rt-thread/bsp/swm320-lq100/Libraries/SWM320_StdPeriph_Driver/SWM320_i2c.c

/******************************************************************************************************************************************
* <EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: SWM320_i2c.c
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: SWM320<EFBFBD><EFBFBD>Ƭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD>нӿڹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>֧<EFBFBD><EFBFBD>: http://www.synwit.com.cn/e/tool/gbook/?bid=1
* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
* <EFBFBD>汾<EFBFBD><EFBFBD><EFBFBD><EFBFBD>: V1.1.0      2017<EFBFBD><EFBFBD>10<EFBFBD><EFBFBD>25<EFBFBD><EFBFBD>
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¼:
*
*
*******************************************************************************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIES AT PROVIDING CUSTOMERS WITH CODING INFORMATION
* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIEE. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIES ARISING FROM THE CONTENT
* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
* -ECTION WITH THEIR PRODUCTS.
*
* COPYRIGHT 2012 Synwit Technology
*******************************************************************************************************************************************/
#include "SWM320.h"
#include "SWM320_i2c.h"

/******************************************************************************************************************************************
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Init()
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: I2C<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
* <EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>: I2C_TypeDef * I2Cx      ָ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Чֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>I2C0<EFBFBD><EFBFBD>I2C1
*           I2C_InitStructure * initStruct  <EFBFBD><EFBFBD><EFBFBD><EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>趨ֵ<EFBFBD>Ľṹ<EFBFBD><EFBFBD>
* <EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: ģ<EFBFBD><EFBFBD>ֻ<EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ
******************************************************************************************************************************************/
void I2C_Init(I2C_TypeDef *I2Cx, I2C_InitStructure *initStruct)
{
    switch ((uint32_t)I2Cx)
    {
    case ((uint32_t)I2C0):
        SYS->CLKEN |= (0x01 << SYS_CLKEN_I2C0_Pos);
        break;

    case ((uint32_t)I2C1):
        SYS->CLKEN |= (0x01 << SYS_CLKEN_I2C1_Pos);
        break;
    }

    I2C_Close(I2Cx);    //һЩ<D2BB>ؼ<EFBFBD><D8BC>Ĵ<EFBFBD><C4B4><EFBFBD>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>I2C<32>ر<EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>

    if (initStruct->Master == 1)
    {
        I2Cx->CLKDIV = SystemCoreClock / 5 / initStruct->MstClk;

        I2Cx->MSTCMD = (I2Cx->MSTCMD & (~I2C_MSTCMD_IF_Msk)) | (1 << I2C_MSTCMD_IF_Pos);    //ʹ<><CAB9><EFBFBD>ж<EFBFBD>֮ǰ<D6AE><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϱ<D0B6>־
        I2Cx->CTRL &= ~I2C_CTRL_MSTIE_Msk;
        I2Cx->CTRL |= (initStruct->MstIEn << I2C_CTRL_MSTIE_Pos);

        switch ((uint32_t)I2Cx)
        {
        case ((uint32_t)I2C0):
            if (initStruct->MstIEn)
            {
                NVIC_EnableIRQ(I2C0_IRQn);
            }
            else
            {
                NVIC_DisableIRQ(I2C0_IRQn);
            }
            break;

        case ((uint32_t)I2C1):
            if (initStruct->MstIEn)
            {
                NVIC_EnableIRQ(I2C1_IRQn);
            }
            else
            {
                NVIC_DisableIRQ(I2C1_IRQn);
            }
            break;
        }
    }
    else
    {
        I2Cx->SLVCR |= (1 << I2C_SLVCR_SLAVE_Pos);

        I2Cx->SLVCR &= ~(I2C_SLVCR_ADDR7b_Msk | I2C_SLVCR_ADDR_Msk);
        I2Cx->SLVCR |= (1 << I2C_SLVCR_ACK_Pos) |
                       (initStruct->Addr7b << I2C_SLVCR_ADDR7b_Pos) |
                       (initStruct->SlvAddr << I2C_SLVCR_ADDR_Pos);

        I2Cx->SLVIF = I2C_SLVIF_RXEND_Msk | I2C_SLVIF_TXEND_Msk | I2C_SLVIF_STADET_Msk | I2C_SLVIF_STODET_Msk;  //<2F><><EFBFBD>жϱ<D0B6>־
        I2Cx->SLVCR &= ~(I2C_SLVCR_IM_RXEND_Msk | I2C_SLVCR_IM_TXEND_Msk | I2C_SLVCR_IM_STADET_Msk | I2C_SLVCR_IM_STODET_Msk |
                         I2C_SLVCR_IM_RDREQ_Msk | I2C_SLVCR_IM_WRREQ_Msk);
        I2Cx->SLVCR |= ((initStruct->SlvRxEndIEn  ? 0 : 1) << I2C_SLVCR_IM_RXEND_Pos)  |
                       ((initStruct->SlvTxEndIEn  ? 0 : 1) << I2C_SLVCR_IM_TXEND_Pos)  |
                       ((initStruct->SlvSTADetIEn ? 0 : 1) << I2C_SLVCR_IM_STADET_Pos) |
                       ((initStruct->SlvSTODetIEn ? 0 : 1) << I2C_SLVCR_IM_STODET_Pos) |
                       ((initStruct->SlvRdReqIEn  ? 0 : 1) << I2C_SLVCR_IM_RDREQ_Pos)  |
                       ((initStruct->SlvWrReqIEn  ? 0 : 1) << I2C_SLVCR_IM_WRREQ_Pos);

        switch ((uint32_t)I2Cx)
        {
        case ((uint32_t)I2C0):
            if (initStruct->SlvRxEndIEn | initStruct->SlvTxEndIEn | initStruct->SlvSTADetIEn |
                    initStruct->SlvSTODetIEn | initStruct->SlvRdReqIEn | initStruct->SlvWrReqIEn)
            {
                NVIC_EnableIRQ(I2C0_IRQn);
            }
            else
            {
                NVIC_DisableIRQ(I2C0_IRQn);
            }
            break;

        case ((uint32_t)I2C1):
            if (initStruct->SlvRxEndIEn | initStruct->SlvTxEndIEn | initStruct->SlvSTADetIEn |
                    initStruct->SlvSTODetIEn | initStruct->SlvRdReqIEn | initStruct->SlvWrReqIEn)
            {
                NVIC_EnableIRQ(I2C1_IRQn);
            }
            else
            {
                NVIC_DisableIRQ(I2C1_IRQn);
            }
            break;
        }
    }
}

/******************************************************************************************************************************************
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Open()
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: I2C<EFBFBD>򿪣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>շ<EFBFBD>
* <EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>: I2C_TypeDef * I2Cx      ָ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Чֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>I2C0<EFBFBD><EFBFBD>I2C1
* <EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
******************************************************************************************************************************************/
void I2C_Open(I2C_TypeDef *I2Cx)
{
    I2Cx->CTRL |= (0x01 << I2C_CTRL_EN_Pos);
}

/******************************************************************************************************************************************
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: I2C_Close()
* <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>: I2C<EFBFBD>رգ<EFBFBD><EFBFBD><EFBFBD>ֹ<EFBFBD>շ<EFBFBD>
* <EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>: I2C_TypeDef * I2Cx      ָ<EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>I2C<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Чֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>I2C0<EFBFBD><EFBFBD>I2C1
* <EFBFBD><EFBFBD>    <EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
* ע<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>: <EFBFBD><EFBFBD>
******************************************************************************************************************************************/
void I2C_Close(I2C_TypeDef *I2Cx)
{
    I2Cx->CTRL &= ~I2C_CTRL_EN_Msk;
}