1244 lines
45 KiB
C
1244 lines
45 KiB
C
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/**************************************************************************//**
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* @file i2c.c
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* @version V3.00
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* @brief NUC980 series I2C driver source file
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*
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* SPDX-License-Identifier: Apache-2.0
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* @copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
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*****************************************************************************/
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#include "nu_i2c.h"
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#include "nu_sys.h"
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/** @addtogroup Standard_Driver Standard Driver
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@{
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*/
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/** @addtogroup I2C_Driver I2C Driver
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@{
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*/
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/** @addtogroup I2C_EXPORTED_FUNCTIONS I2C Exported Functions
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@{
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*/
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/**
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* @brief Enable specify I2C Controller and set Clock Divider
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u32BusClock The target I2C bus clock in Hz
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*
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* @return Actual I2C bus clock frequency
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*
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* @details The function enable the specify I2C Controller and set proper Clock Divider
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* in I2C CLOCK DIVIDED REGISTER (I2CLK) according to the target I2C Bus clock.
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* I2C Bus clock = PCLK / (4*(divider+1).
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*
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*/
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uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock)
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{
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uint32_t u32Div;
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uint32_t u32Pclk;
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u32Pclk = (sysGetClock(SYS_PCLK01)) * 1000000;
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u32Div = (uint32_t)(((u32Pclk * 10U) / (u32BusClock * 4U) + 5U) / 10U - 1U); /* Compute proper divider for I2C clock */
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i2c->CLKDIV = u32Div;
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/* Enable I2C */
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i2c->CTL0 |= I2C_CTL0_I2CEN_Msk;
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return (u32Pclk / ((u32Div + 1U) << 2U));
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}
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/**
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* @brief Disable specify I2C Controller
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details Reset I2C Controller and disable specify I2C port.
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*
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*/
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void I2C_Close(I2C_T *i2c)
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{
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/* Reset I2C Controller */
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if ((uint32_t)i2c == I2C0_BA)
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{
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 0));
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 0));
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}
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else if ((uint32_t)i2c == I2C1_BA)
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{
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 1));
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 1));
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}
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else if ((uint32_t)i2c == I2C2_BA)
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{
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 2));
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 2));
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}
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else if ((uint32_t)i2c == I2C3_BA)
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{
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 3));
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outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 3));
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}
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/* Disable I2C */
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i2c->CTL0 &= ~I2C_CTL0_I2CEN_Msk;
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}
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/**
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* @brief Clear Time-out Counter flag
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details When Time-out flag will be set, use this function to clear I2C Bus Time-out counter flag .
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*
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*/
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void I2C_ClearTimeoutFlag(I2C_T *i2c)
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{
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i2c->TOCTL |= I2C_TOCTL_TOIF_Msk;
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}
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/**
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* @brief Set Control bit of I2C Controller
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u8Start Set I2C START condition
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* @param[in] u8Stop Set I2C STOP condition
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* @param[in] u8Si Clear SI flag
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* @param[in] u8Ack Set I2C ACK bit
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*
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* @return None
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*
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* @details The function set I2C Control bit of I2C Bus protocol.
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*
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*/
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void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack)
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{
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uint32_t u32Reg = 0U;
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if (u8Start)
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{
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u32Reg |= I2C_CTL_STA;
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}
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if (u8Stop)
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{
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u32Reg |= I2C_CTL_STO;
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}
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if (u8Si)
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{
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u32Reg |= I2C_CTL_SI;
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}
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if (u8Ack)
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{
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u32Reg |= I2C_CTL_AA;
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}
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i2c->CTL0 = (i2c->CTL0 & ~0x3CU) | u32Reg;
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}
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/**
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* @brief Disable Interrupt of I2C Controller
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details The function is used for disable I2C interrupt
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*
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*/
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void I2C_DisableInt(I2C_T *i2c)
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{
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i2c->CTL0 &= ~I2C_CTL0_INTEN_Msk;
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}
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/**
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* @brief Enable Interrupt of I2C Controller
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*
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* @param[in] i2c Specify I2C port
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*
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* @return None
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*
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* @details The function is used for enable I2C interrupt
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*
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*/
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void I2C_EnableInt(I2C_T *i2c)
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{
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i2c->CTL0 |= I2C_CTL0_INTEN_Msk;
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}
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/**
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* @brief Get I2C Bus Clock
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*
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* @param[in] i2c Specify I2C port
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*
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* @return The actual I2C Bus clock in Hz
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*
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* @details To get the actual I2C Bus Clock frequency.
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*/
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uint32_t I2C_GetBusClockFreq(I2C_T *i2c)
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{
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uint32_t u32Divider = i2c->CLKDIV;
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uint32_t u32Pclk;
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u32Pclk = (sysGetClock(SYS_PCLK01)) * 1000000;
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return (u32Pclk / ((u32Divider + 1U) << 2U));
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}
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/**
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* @brief Set I2C Bus Clock
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u32BusClock The target I2C Bus Clock in Hz
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*
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* @return The actual I2C Bus Clock in Hz
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*
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* @details To set the actual I2C Bus Clock frequency.
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*/
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uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
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{
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uint32_t u32Div;
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uint32_t u32Pclk;
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u32Pclk = (sysGetClock(SYS_PCLK01)) * 1000000;
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u32Div = (uint32_t)(((u32Pclk * 10U) / (u32BusClock * 4U) + 5U) / 10U - 1U); /* Compute proper divider for I2C clock */
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i2c->CLKDIV = u32Div;
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return (u32Pclk / ((u32Div + 1U) << 2U));
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}
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/**
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* @brief Get Interrupt Flag
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*
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* @param[in] i2c Specify I2C port
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*
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* @return I2C interrupt flag status
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*
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* @details To get I2C Bus interrupt flag.
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*/
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uint32_t I2C_GetIntFlag(I2C_T *i2c)
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{
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uint32_t u32Value;
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if ((i2c->CTL0 & I2C_CTL0_SI_Msk) == I2C_CTL0_SI_Msk)
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{
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u32Value = 1U;
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}
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else
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{
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u32Value = 0U;
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}
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return u32Value;
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}
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/**
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* @brief Get I2C Bus Status Code
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*
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* @param[in] i2c Specify I2C port
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*
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* @return I2C Status Code
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*
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* @details To get I2C Bus Status Code.
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*/
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uint32_t I2C_GetStatus(I2C_T *i2c)
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{
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return (i2c->STATUS0);
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}
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/**
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* @brief Read a Byte from I2C Bus
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*
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* @param[in] i2c Specify I2C port
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*
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* @return I2C Data
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*
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* @details To read a bytes data from specify I2C port.
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*/
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uint8_t I2C_GetData(I2C_T *i2c)
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{
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return (uint8_t)(i2c->DAT);
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}
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/**
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* @brief Send a byte to I2C Bus
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u8Data The data to send to I2C bus
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*
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* @return None
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*
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* @details This function is used to write a byte to specified I2C port
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*/
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void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
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{
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i2c->DAT = u8Data;
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}
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/**
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* @brief Set 7-bit Slave Address and GC Mode
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u8SlaveNo Set the number of I2C address register (0~3)
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* @param[in] u8SlaveAddr 7-bit slave address
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* @param[in] u8GCMode Enable/Disable GC mode (I2C_GCMODE_ENABLE / I2C_GCMODE_DISABLE)
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*
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* @return None
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*
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* @details This function is used to set 7-bit slave addresses in I2C SLAVE ADDRESS REGISTER (I2CADDR0~3)
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* and enable GC Mode.
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*
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*/
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void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode)
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{
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switch (u8SlaveNo)
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{
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case 1:
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i2c->ADDR1 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
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break;
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case 2:
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i2c->ADDR2 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
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break;
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case 3:
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i2c->ADDR3 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
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break;
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case 0:
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default:
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i2c->ADDR0 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
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break;
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}
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}
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/**
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* @brief Configure the mask bits of 7-bit Slave Address
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*
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* @param[in] i2c Specify I2C port
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* @param[in] u8SlaveNo Set the number of I2C address mask register (0~3)
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* @param[in] u8SlaveAddrMask A byte for slave address mask
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*
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* @return None
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*
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* @details This function is used to set 7-bit slave addresses.
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*
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*/
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void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask)
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{
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switch (u8SlaveNo)
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{
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case 1:
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i2c->ADDRMSK1 = (uint32_t)u8SlaveAddrMask << 1U;
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break;
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case 2:
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i2c->ADDRMSK2 = (uint32_t)u8SlaveAddrMask << 1U;
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break;
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case 3:
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i2c->ADDRMSK3 = (uint32_t)u8SlaveAddrMask << 1U;
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break;
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case 0:
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default:
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i2c->ADDRMSK0 = (uint32_t)u8SlaveAddrMask << 1U;
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break;
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||
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}
|
||
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}
|
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|
|
|
||
|
|
/**
|
||
|
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* @brief Enable Time-out Counter Function and support Long Time-out
|
||
|
|
*
|
||
|
|
* @param[in] i2c Specify I2C port
|
||
|
|
* @param[in] u8LongTimeout Configure DIV4 to enable Long Time-out (0/1)
|
||
|
|
*
|
||
|
|
* @return None
|
||
|
|
*
|
||
|
|
* @details This function enable Time-out Counter function and configure DIV4 to support Long
|
||
|
|
* Time-out.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void I2C_EnableTimeout(I2C_T *i2c, uint8_t u8LongTimeout)
|
||
|
|
{
|
||
|
|
if (u8LongTimeout)
|
||
|
|
{
|
||
|
|
i2c->TOCTL |= I2C_TOCTL_TOCDIV4_Msk;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
i2c->TOCTL &= ~I2C_TOCTL_TOCDIV4_Msk;
|
||
|
|
}
|
||
|
|
|
||
|
|
i2c->TOCTL |= I2C_TOCTL_TOCEN_Msk;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Disable Time-out Counter Function
|
||
|
|
*
|
||
|
|
* @param[in] i2c Specify I2C port
|
||
|
|
*
|
||
|
|
* @return None
|
||
|
|
*
|
||
|
|
* @details To disable Time-out Counter function in I2CTOC register.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void I2C_DisableTimeout(I2C_T *i2c)
|
||
|
|
{
|
||
|
|
i2c->TOCTL &= ~I2C_TOCTL_TOCEN_Msk;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Enable I2C Wake-up Function
|
||
|
|
*
|
||
|
|
* @param[in] i2c Specify I2C port
|
||
|
|
*
|
||
|
|
* @return None
|
||
|
|
*
|
||
|
|
* @details To enable Wake-up function of I2C Wake-up control register.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void I2C_EnableWakeup(I2C_T *i2c)
|
||
|
|
{
|
||
|
|
i2c->WKCTL |= I2C_WKCTL_WKEN_Msk;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Disable I2C Wake-up Function
|
||
|
|
*
|
||
|
|
* @param[in] i2c Specify I2C port
|
||
|
|
*
|
||
|
|
* @return None
|
||
|
|
*
|
||
|
|
* @details To disable Wake-up function of I2C Wake-up control register.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void I2C_DisableWakeup(I2C_T *i2c)
|
||
|
|
{
|
||
|
|
i2c->WKCTL &= ~I2C_WKCTL_WKEN_Msk;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Write a byte to Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] data Write a byte data to Slave
|
||
|
|
*
|
||
|
|
* @retval 0 Write data success
|
||
|
|
* @retval 1 Write data fail, or bus occurs error events
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master write a byte data to Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint8_t I2C_WriteByte(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t data)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c);
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, data); /* Write data to I2CDAT */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return (u8Err | u8Xfering); /* return (Success)/(Fail) status */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Write multi bytes to Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] *data Pointer to array to write data to Slave
|
||
|
|
* @param[in] u32wLen How many bytes need to write to Slave
|
||
|
|
*
|
||
|
|
* @return A length of how many bytes have been transmitted.
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master write multi bytes data to Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint32_t I2C_WriteMultiBytes(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t data[], uint32_t u32wLen)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32txLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
case 0x28u:
|
||
|
|
if (u32txLen < u32wLen)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, data[u32txLen++]); /* Write Data to I2CDAT */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return u32txLen; /* Return bytes length that have been transmitted */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify a byte register address and write a byte to Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u8DataAddr Specify a address (1 byte) of data write to
|
||
|
|
* @param[in] data A byte data to write it to Slave
|
||
|
|
*
|
||
|
|
* @retval 0 Write data success
|
||
|
|
* @retval 1 Write data fail, or bus occurs error events
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify a address that data write to in Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint8_t I2C_WriteByteOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr, uint8_t data)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32txLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Send Slave address with write bit */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
if (u32txLen < 1u)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, data);
|
||
|
|
u32txLen++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return (u8Err | u8Xfering); /* return (Success)/(Fail) status */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify a byte register address and write multi bytes to Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u8DataAddr Specify a address (1 byte) of data write to
|
||
|
|
* @param[in] *data Pointer to array to write data to Slave
|
||
|
|
* @param[in] u32wLen How many bytes need to write to Slave
|
||
|
|
*
|
||
|
|
* @return A length of how many bytes have been transmitted.
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify a byte address that multi data bytes write to in Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint32_t I2C_WriteMultiBytesOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr, uint8_t data[], uint32_t u32wLen)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32txLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI;
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
if (u32txLen < u32wLen)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, data[u32txLen++]);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
|
||
|
|
return u32txLen; /* Return bytes length that have been transmitted */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify two bytes register address and Write a byte to Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u16DataAddr Specify a address (2 byte) of data write to
|
||
|
|
* @param[in] data Write a byte data to Slave
|
||
|
|
*
|
||
|
|
* @retval 0 Write data success
|
||
|
|
* @retval 1 Write data fail, or bus occurs error events
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify two bytes address that data write to in Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint8_t I2C_WriteByteTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, uint8_t data)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Addr = 1u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32txLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
if (u8Addr)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */
|
||
|
|
u8Addr = 0u;
|
||
|
|
}
|
||
|
|
else if ((u32txLen < 1u) && (u8Addr == 0u))
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, data);
|
||
|
|
u32txLen++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return (u8Err | u8Xfering); /* return (Success)/(Fail) status */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify two bytes register address and write multi bytes to Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u16DataAddr Specify a address (2 bytes) of data write to
|
||
|
|
* @param[in] data[] A data array for write data to Slave
|
||
|
|
* @param[in] u32wLen How many bytes need to write to Slave
|
||
|
|
*
|
||
|
|
* @return A length of how many bytes have been transmitted.
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify a byte address that multi data write to in Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
uint32_t I2C_WriteMultiBytesTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, uint8_t data[], uint32_t u32wLen)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Addr = 1u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32txLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
if (u8Addr)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */
|
||
|
|
u8Addr = 0u;
|
||
|
|
}
|
||
|
|
else if ((u32txLen < u32wLen) && (u8Addr == 0u))
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, data[u32txLen++]); /* Write data to Register I2CDAT*/
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return u32txLen; /* Return bytes length that have been transmitted */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Read a byte from Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
*
|
||
|
|
* @return Read a byte data from Slave
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master to read a byte data from Slave.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
uint8_t I2C_ReadByte(I2C_T *i2c, uint8_t u8SlaveAddr)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, rdata = 0u, u8Ctrl = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x40u: /* Slave Address ACK */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x48u: /* Slave Address NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x58u:
|
||
|
|
rdata = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
if (u8Err)
|
||
|
|
{
|
||
|
|
rdata = 0u; /* If occurs error, return 0 */
|
||
|
|
}
|
||
|
|
return rdata; /* Return read data */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Read multi bytes from Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[out] rdata[] A data array to store data from Slave
|
||
|
|
* @param[in] u32rLen How many bytes need to read from Slave
|
||
|
|
*
|
||
|
|
* @return A length of how many bytes have been received
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master to read multi data bytes from Slave.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
uint32_t I2C_ReadMultiBytes(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t rdata[], uint32_t u32rLen)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32rxLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x40u: /* Slave Address ACK */
|
||
|
|
u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */
|
||
|
|
break;
|
||
|
|
case 0x48u: /* Slave Address NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x50u:
|
||
|
|
rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
if (u32rxLen < (u32rLen - 1u))
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x58u:
|
||
|
|
rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return u32rxLen; /* Return bytes length that have been received */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify a byte register address and read a byte from Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u8DataAddr Specify a address(1 byte) of data read from
|
||
|
|
*
|
||
|
|
* @return Read a byte data from Slave
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify a byte address that a data byte read from Slave.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
uint8_t I2C_ReadByteOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, rdata = 0u, u8Ctrl = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
u8Ctrl = I2C_CTL_STA_SI; /* Send repeat START */
|
||
|
|
break;
|
||
|
|
case 0x10u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x40u: /* Slave Address ACK */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x48u: /* Slave Address NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x58u:
|
||
|
|
rdata = (uint8_t) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
if (u8Err)
|
||
|
|
{
|
||
|
|
rdata = 0u; /* If occurs error, return 0 */
|
||
|
|
}
|
||
|
|
return rdata; /* Return read data */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify a byte register address and read multi bytes from Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u8DataAddr Specify a address (1 bytes) of data read from
|
||
|
|
* @param[out] rdata[] A data array to store data from Slave
|
||
|
|
* @param[in] u32rLen How many bytes need to read from Slave
|
||
|
|
*
|
||
|
|
* @return A length of how many bytes have been received
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify a byte address that multi data bytes read from Slave.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
uint32_t I2C_ReadMultiBytesOneReg(I2C_T *i2c, uint8_t u8SlaveAddr, uint8_t u8DataAddr, uint8_t rdata[], uint32_t u32rLen)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32rxLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, u8DataAddr); /* Write Lo byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
u8Ctrl = I2C_CTL_STA_SI; /* Send repeat START */
|
||
|
|
break;
|
||
|
|
case 0x10u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x40u: /* Slave Address ACK */
|
||
|
|
u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */
|
||
|
|
break;
|
||
|
|
case 0x48u: /* Slave Address NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x50u:
|
||
|
|
rdata[u32rxLen++] = (uint8_t) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
if (u32rxLen < (u32rLen - 1u))
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x58u:
|
||
|
|
rdata[u32rxLen++] = (uint8_t) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return u32rxLen; /* Return bytes length that have been received */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify two bytes register address and read a byte from Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u16DataAddr Specify an address(2 bytes) of data read from
|
||
|
|
*
|
||
|
|
* @return Read a byte data from Slave
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify two bytes address that a data byte read from Slave.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
uint8_t I2C_ReadByteTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, rdata = 0u, u8Addr = 1u, u8Ctrl = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
if (u8Addr)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */
|
||
|
|
u8Addr = 0u;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STA_SI; /* Clear SI and send repeat START */
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x10u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x40u: /* Slave Address ACK */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x48u: /* Slave Address NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x58u:
|
||
|
|
rdata = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
if (u8Err)
|
||
|
|
{
|
||
|
|
rdata = 0u; /* If occurs error, return 0 */
|
||
|
|
}
|
||
|
|
return rdata; /* Return read data */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Specify two bytes register address and read multi bytes from Slave
|
||
|
|
*
|
||
|
|
* @param[in] *i2c Point to I2C peripheral
|
||
|
|
* @param[in] u8SlaveAddr Access Slave address(7-bit)
|
||
|
|
* @param[in] u16DataAddr Specify a address (2 bytes) of data read from
|
||
|
|
* @param[out] rdata[] A data array to store data from Slave
|
||
|
|
* @param[in] u32rLen How many bytes need to read from Slave
|
||
|
|
*
|
||
|
|
* @return A length of how many bytes have been received
|
||
|
|
*
|
||
|
|
* @details The function is used for I2C Master specify two bytes address that multi data bytes read from Slave.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
uint32_t I2C_ReadMultiBytesTwoRegs(I2C_T *i2c, uint8_t u8SlaveAddr, uint16_t u16DataAddr, uint8_t rdata[], uint32_t u32rLen)
|
||
|
|
{
|
||
|
|
uint8_t u8Xfering = 1u, u8Err = 0u, u8Addr = 1u, u8Ctrl = 0u;
|
||
|
|
uint32_t u32rxLen = 0u;
|
||
|
|
|
||
|
|
I2C_START(i2c); /* Send START */
|
||
|
|
while (u8Xfering && (u8Err == 0u))
|
||
|
|
{
|
||
|
|
I2C_WAIT_READY(i2c) {}
|
||
|
|
switch (I2C_GET_STATUS(i2c))
|
||
|
|
{
|
||
|
|
case 0x08u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u8SlaveAddr << 1u | 0x00u)); /* Write SLA+W to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x18u: /* Slave Address ACK */
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u16DataAddr & 0xFF00u) >> 8u)); /* Write Hi byte address of register */
|
||
|
|
break;
|
||
|
|
case 0x20u: /* Slave Address NACK */
|
||
|
|
case 0x30u: /* Master transmit data NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x28u:
|
||
|
|
if (u8Addr)
|
||
|
|
{
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)(u16DataAddr & 0xFFu)); /* Write Lo byte address of register */
|
||
|
|
u8Addr = 0u;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_STA_SI; /* Clear SI and send repeat START */
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x10u:
|
||
|
|
I2C_SET_DATA(i2c, (uint8_t)((u8SlaveAddr << 1u) | 0x01u)); /* Write SLA+R to Register I2CDAT */
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
break;
|
||
|
|
case 0x40u: /* Slave Address ACK */
|
||
|
|
u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */
|
||
|
|
break;
|
||
|
|
case 0x48u: /* Slave Address NACK */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
case 0x50u:
|
||
|
|
rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
if (u32rxLen < (u32rLen - 1u))
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_SI_AA; /* Clear SI and set ACK */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u8Ctrl = I2C_CTL_SI; /* Clear SI */
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case 0x58u:
|
||
|
|
rdata[u32rxLen++] = (unsigned char) I2C_GET_DATA(i2c); /* Receive Data */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Xfering = 0u;
|
||
|
|
break;
|
||
|
|
case 0x38u: /* Arbitration Lost */
|
||
|
|
default: /* Unknow status */
|
||
|
|
u8Ctrl = I2C_CTL_STO_SI; /* Clear SI and send STOP */
|
||
|
|
u8Err = 1u;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
I2C_SET_CONTROL_REG(i2c, u8Ctrl); /* Write controlbit to I2C_CTL register */
|
||
|
|
}
|
||
|
|
return u32rxLen; /* Return bytes length that have been received */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief The macro is used to set STOP condition of I2C Bus
|
||
|
|
*
|
||
|
|
* @param[in] i2c Specify I2C port
|
||
|
|
*
|
||
|
|
* @return None
|
||
|
|
*
|
||
|
|
* @details Set the I2C bus STOP condition in I2C_CTL register.
|
||
|
|
*/
|
||
|
|
void I2C_STOP(I2C_T *i2c)
|
||
|
|
{
|
||
|
|
|
||
|
|
(i2c)->CTL0 |= (I2C_CTL0_SI_Msk | I2C_CTL0_STO_Msk);
|
||
|
|
while (i2c->CTL0 & I2C_CTL0_STO_Msk)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*@}*/ /* end of group I2C_EXPORTED_FUNCTIONS */
|
||
|
|
|
||
|
|
/*@}*/ /* end of group I2C_Driver */
|
||
|
|
|
||
|
|
/*@}*/ /* end of group Standard_Driver */
|
||
|
|
|
||
|
|
/*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/
|