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rt-thread-official/bsp/nuvoton/libraries/nuc980/Driver/Source/nu_i2c.c

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Update nuvoton porting. 1. Make up sources and bugfix. 2. Add nu_gpio_pin_get. 3. Add PM operator in USB host driver. 4. Support NUC980 stage 1 and add nk-980iot board.
2020-12-21 14:34:01 +08:00
/**************************************************************************//**
* @file i2c.c
* @version V3.00
* @brief NUC980 series I2C driver source file
*
* SPDX-License-Identifier: Apache-2.0
* @copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
*****************************************************************************/
#include "nu_i2c.h"
#include "nu_sys.h"
/** @addtogroup Standard_Driver Standard Driver
@{
*/
/** @addtogroup I2C_Driver I2C Driver
@{
*/
/** @addtogroup I2C_EXPORTED_FUNCTIONS I2C Exported Functions
@{
*/
/**
* @brief Enable specify I2C Controller and set Clock Divider
*
* @param[in] i2c Specify I2C port
* @param[in] u32BusClock The target I2C bus clock in Hz
*
* @return Actual I2C bus clock frequency
*
* @details The function enable the specify I2C Controller and set proper Clock Divider
* in I2C CLOCK DIVIDED REGISTER (I2CLK) according to the target I2C Bus clock.
* I2C Bus clock = PCLK / (4*(divider+1).
*
*/
uint32_t I2C_Open(I2C_T *i2c, uint32_t u32BusClock)
{
uint32_t u32Div;
uint32_t u32Pclk;
u32Pclk = (sysGetClock(SYS_PCLK01)) * 1000000;
u32Div = (uint32_t)(((u32Pclk * 10U) / (u32BusClock * 4U) + 5U) / 10U - 1U); /* Compute proper divider for I2C clock */
i2c->CLKDIV = u32Div;
/* Enable I2C */
i2c->CTL0 |= I2C_CTL0_I2CEN_Msk;
return (u32Pclk / ((u32Div + 1U) << 2U));
}
/**
* @brief Disable specify I2C Controller
*
* @param[in] i2c Specify I2C port
*
* @return None
*
* @details Reset I2C Controller and disable specify I2C port.
*
*/
void I2C_Close(I2C_T *i2c)
{
/* Reset I2C Controller */
if ((uint32_t)i2c == I2C0_BA)
{
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 0));
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 0));
}
else if ((uint32_t)i2c == I2C1_BA)
{
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 1));
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 1));
}
else if ((uint32_t)i2c == I2C2_BA)
{
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 2));
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 2));
}
else if ((uint32_t)i2c == I2C3_BA)
{
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) | (0x1 << 3));
outp32(REG_SYS_APBIPRST1, inpw(REG_SYS_APBIPRST1) & ~(0x1 << 3));
}
/* Disable I2C */
i2c->CTL0 &= ~I2C_CTL0_I2CEN_Msk;
}
/**
* @brief Clear Time-out Counter flag
*
* @param[in] i2c Specify I2C port
*
* @return None
*
* @details When Time-out flag will be set, use this function to clear I2C Bus Time-out counter flag .
*
*/
void I2C_ClearTimeoutFlag(I2C_T *i2c)
{
i2c->TOCTL |= I2C_TOCTL_TOIF_Msk;
}
/**
* @brief Set Control bit of I2C Controller
*
* @param[in] i2c Specify I2C port
* @param[in] u8Start Set I2C START condition
* @param[in] u8Stop Set I2C STOP condition
* @param[in] u8Si Clear SI flag
* @param[in] u8Ack Set I2C ACK bit
*
* @return None
*
* @details The function set I2C Control bit of I2C Bus protocol.
*
*/
void I2C_Trigger(I2C_T *i2c, uint8_t u8Start, uint8_t u8Stop, uint8_t u8Si, uint8_t u8Ack)
{
uint32_t u32Reg = 0U;
if (u8Start)
{
u32Reg |= I2C_CTL_STA;
}
if (u8Stop)
{
u32Reg |= I2C_CTL_STO;
}
if (u8Si)
{
u32Reg |= I2C_CTL_SI;
}
if (u8Ack)
{
u32Reg |= I2C_CTL_AA;
}
i2c->CTL0 = (i2c->CTL0 & ~0x3CU) | u32Reg;
}
/**
* @brief Disable Interrupt of I2C Controller
*
* @param[in] i2c Specify I2C port
*
* @return None
*
* @details The function is used for disable I2C interrupt
*
*/
void I2C_DisableInt(I2C_T *i2c)
{
i2c->CTL0 &= ~I2C_CTL0_INTEN_Msk;
}
/**
* @brief Enable Interrupt of I2C Controller
*
* @param[in] i2c Specify I2C port
*
* @return None
*
* @details The function is used for enable I2C interrupt
*
*/
void I2C_EnableInt(I2C_T *i2c)
{
i2c->CTL0 |= I2C_CTL0_INTEN_Msk;
}
/**
* @brief Get I2C Bus Clock
*
* @param[in] i2c Specify I2C port
*
* @return The actual I2C Bus clock in Hz
*
* @details To get the actual I2C Bus Clock frequency.
*/
uint32_t I2C_GetBusClockFreq(I2C_T *i2c)
{
uint32_t u32Divider = i2c->CLKDIV;
uint32_t u32Pclk;
u32Pclk = (sysGetClock(SYS_PCLK01)) * 1000000;
return (u32Pclk / ((u32Divider + 1U) << 2U));
}
/**
* @brief Set I2C Bus Clock
*
* @param[in] i2c Specify I2C port
* @param[in] u32BusClock The target I2C Bus Clock in Hz
*
* @return The actual I2C Bus Clock in Hz
*
* @details To set the actual I2C Bus Clock frequency.
*/
uint32_t I2C_SetBusClockFreq(I2C_T *i2c, uint32_t u32BusClock)
{
uint32_t u32Div;
uint32_t u32Pclk;
u32Pclk = (sysGetClock(SYS_PCLK01)) * 1000000;
u32Div = (uint32_t)(((u32Pclk * 10U) / (u32BusClock * 4U) + 5U) / 10U - 1U); /* Compute proper divider for I2C clock */
i2c->CLKDIV = u32Div;
return (u32Pclk / ((u32Div + 1U) << 2U));
}
/**
* @brief Get Interrupt Flag
*
* @param[in] i2c Specify I2C port
*
* @return I2C interrupt flag status
*
* @details To get I2C Bus interrupt flag.
*/
uint32_t I2C_GetIntFlag(I2C_T *i2c)
{
uint32_t u32Value;
if ((i2c->CTL0 & I2C_CTL0_SI_Msk) == I2C_CTL0_SI_Msk)
{
u32Value = 1U;
}
else
{
u32Value = 0U;
}
return u32Value;
}
/**
* @brief Get I2C Bus Status Code
*
* @param[in] i2c Specify I2C port
*
* @return I2C Status Code
*
* @details To get I2C Bus Status Code.
*/
uint32_t I2C_GetStatus(I2C_T *i2c)
{
return (i2c->STATUS0);
}
/**
* @brief Read a Byte from I2C Bus
*
* @param[in] i2c Specify I2C port
*
* @return I2C Data
*
* @details To read a bytes data from specify I2C port.
*/
uint8_t I2C_GetData(I2C_T *i2c)
{
return (uint8_t)(i2c->DAT);
}
/**
* @brief Send a byte to I2C Bus
*
* @param[in] i2c Specify I2C port
* @param[in] u8Data The data to send to I2C bus
*
* @return None
*
* @details This function is used to write a byte to specified I2C port
*/
void I2C_SetData(I2C_T *i2c, uint8_t u8Data)
{
i2c->DAT = u8Data;
}
/**
* @brief Set 7-bit Slave Address and GC Mode
*
* @param[in] i2c Specify I2C port
* @param[in] u8SlaveNo Set the number of I2C address register (0~3)
* @param[in] u8SlaveAddr 7-bit slave address
* @param[in] u8GCMode Enable/Disable GC mode (I2C_GCMODE_ENABLE / I2C_GCMODE_DISABLE)
*
* @return None
*
* @details This function is used to set 7-bit slave addresses in I2C SLAVE ADDRESS REGISTER (I2CADDR0~3)
* and enable GC Mode.
*
*/
void I2C_SetSlaveAddr(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddr, uint8_t u8GCMode)
{
switch (u8SlaveNo)
{
case 1:
i2c->ADDR1 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
break;
case 2:
i2c->ADDR2 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
break;
case 3:
i2c->ADDR3 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
break;
case 0:
default:
i2c->ADDR0 = ((uint32_t)u8SlaveAddr << 1U) | u8GCMode;
break;
}
}
/**
* @brief Configure the mask bits of 7-bit Slave Address
*
* @param[in] i2c Specify I2C port
* @param[in] u8SlaveNo Set the number of I2C address mask register (0~3)
* @param[in] u8SlaveAddrMask A byte for slave address mask
*
* @return None
*
* @details This function is used to set 7-bit slave addresses.
*
*/
void I2C_SetSlaveAddrMask(I2C_T *i2c, uint8_t u8SlaveNo, uint8_t u8SlaveAddrMask)
{
switch (u8SlaveNo)
{
case 1:
i2c->ADDRMSK1 = (uint32_t)u8SlaveAddrMask << 1U;
break;
case 2:
i2c->ADDRMSK2 = (uint32_t)u8SlaveAddrMask << 1U;
break;
case 3:
i2c->ADDRMSK3 = (uint32_t)u8SlaveAddrMask << 1U;
break;
case 0:
default:
i2c->ADDRMSK0 = (uint32_t)u8SlaveAddrMask << 1U;
break;
}
}
/**
* @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. ***/