ls1x-master-v0.4/private/ls1c102/1c102_myI2C.c

#include "Config.h"
#include "ls1x.h"
#include "ls1x_latimer.h"
#include "ls1x_clock.h"
#include "ls1x_gpio.h"
#include "1c102_myGPIO.h"
#include "1c102_myI2C.h"

/**初始化部分**/
void MY_I2C_StructInit(I2C_InitTypeDef *I2C_InitStruct)
{
    /*---------------- Reset I2C init structure parameters values ----------------*/
    /* initialize the I2C_ClockSpeed member */
    I2C_InitStruct->I2C_ClockSpeed = 100000;
    /* Initialize the I2C_Mode member */
    I2C_InitStruct->I2C_Mode = I2C_Mode_Master;
    //  I2C_InitStruct->I2C_Mode = I2C_Mode_Slave;
    /* Initialize the I2C_OwnAddress1 member */
    I2C_InitStruct->I2C_OwnAddress1 = 0x2A;
    /* Initialize the I2C_Buslock Check */
    I2C_InitStruct->I2C_BuslockCheckEn = I2C_Buslock_Check_Enable;
    /* Initialize the I2C_Slave_Autoreset */
    I2C_InitStruct->I2C_SlvAutoresetEn = I2C_Slv_Autoreset_Disable;
}

void MY_I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct)
{
    uint32_t tmp = 0;
    uint32_t pclk1 = SystemFreq;

    /*---------------------------- I2Cx Configuration ------------------------*/
    I2Cx->CTRL = 0x20;        //访问分频寄存器
    tmp = pclk1/I2C_InitStruct->I2C_ClockSpeed;
    tmp = (tmp>>2)-1;
    I2Cx->PRERL = tmp;
    I2Cx->PRERH = tmp >> 8;

    /* Enable the selected I2C peripheral */
    I2Cx->CTRL = 0x80|(I2C_InitStruct->I2C_Mode)|(I2C_InitStruct->I2C_BuslockCheckEn)|(I2C_InitStruct->I2C_SlvAutoresetEn);
    if (I2C_InitStruct->I2C_BuslockCheckEn)
    {
        I2Cx->CR_SR = 0x04;
    }

    I2Cx->SADDR = I2C_InitStruct->I2C_OwnAddress1;
    I2C_wait(I2C);

    return;
}

void MY_I2C_InitTask()
{
    remap_gpio(MYI2C_SDA_GPIO_INDEX, GPIO_FUNC_MAIN);
    remap_gpio(MYI2C_SCL_GPIO_INDEX, GPIO_FUNC_MAIN);

    I2C_InitTypeDef My_I2C_InitStruct;
    MY_I2C_StructInit(&My_I2C_InitStruct);
    My_I2C_InitStruct.I2C_ClockSpeed = MYI2C_CLOCK_FAST_SPEED;
    I2C_Init(I2C, &My_I2C_InitStruct);
    delay_ms(500);

    return;
}

/**工具部分*/
void myI2C_write_signal(unsigned char dev_addr, unsigned char reg_addr, unsigned char w_data)
{
    //unsigned int v = SaveDisableInt();

    I2C_GenerateSTART(I2C,ENABLE);
    I2C_wait(I2C);

    I2C_Send7bitAddress(I2C, dev_addr & 0xff, I2C_Direction_Transmitter);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send 7 bit address failed\n");
        goto exit_point;
    }

    I2C_SendData(I2C, reg_addr);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send reg address failed\n");
        goto exit_point;
    }

    I2C_SendData(I2C, w_data);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send data failed\n");
        goto exit_point;
    }

    I2C_GenerateSTOP(I2C,ENABLE);
    I2C_wait(I2C);

    exit_point:
    //recvEnableInt(v);
    return;
}

void myI2C_write_mult(uint8_t dev_addr, uint8_t reg_addr, uint8_t *w_data, uint8_t num)
{
    int i=0;

    I2C_GenerateSTART(I2C,ENABLE);
    I2C_wait(I2C);

    I2C_Send7bitAddress(I2C, dev_addr & 0xff, I2C_Direction_Transmitter);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send 7 bit address failed\n");
        goto exit_point;
    }

    I2C_SendData(I2C, reg_addr);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send reg address failed\n");
        goto exit_point;
    }

    for(i=0; i<num; ++i)
    {
        I2C_SendData(I2C, w_data[i]);
        I2C_wait(I2C);
        if(I2C->CR_SR & 0x80)
        {
            printf("I2C send data failed\n");
            goto exit_point;
        }
    }

    I2C_GenerateSTOP(I2C,ENABLE);
    I2C_wait(I2C);

    exit_point:
    //recvEnableInt(v);
    return;
}

unsigned char myI2C_read_signal(unsigned char dev_addr, unsigned char reg_addr)
{
    //unsigned int v = SaveDisableInt();
    unsigned char ret = 0xff;

    I2C_GenerateSTART(I2C,ENABLE);
    I2C_wait(I2C);

    I2C_Send7bitAddress(I2C, dev_addr & 0xff, I2C_Direction_Transmitter);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send 7 bit address failed\n");
        goto exit_point;
    }

    I2C_SendData(I2C,reg_addr);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send reg address failed\n");
        goto exit_point;
    }

    I2C_Send7bitAddress(I2C, dev_addr & 0xff, I2C_Direction_Receiver);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send 7 bit address failed\n");
        goto exit_point;
    }

    I2C_ReceiveData(I2C,I2C_NACK,I2C_STOP);
    I2C_wait(I2C);
    ret = (uint8_t)I2C->DR;

    exit_point:
    //recvEnableInt(v);
    return ret;
}

unsigned char myI2C_read_mult(uint8_t dev_addr, uint8_t reg_addr, uint8_t *rece_data)
{
    unsigned char i = 0;
    unsigned char ret = 0xFF;

    I2C_GenerateSTART(I2C,ENABLE);
    I2C_wait(I2C);

    I2C_Send7bitAddress(I2C, dev_addr & 0xff, I2C_Direction_Transmitter);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send 7 bit address failed\n");
        goto exit_point;
    }

    I2C_SendData(I2C,reg_addr);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send reg address failed\n");
        goto exit_point;
    }

    I2C_Send7bitAddress(I2C, dev_addr&0xFF, I2C_Direction_Receiver);
    I2C_wait(I2C);
    if(I2C->CR_SR & 0x80)
    {
        printf("I2C send 7 bit address failed\n");
        goto exit_point;
    }

    unsigned char chk = 0;
    while (!chk)
    {
        if(I2C->CR_SR && 0x80){
            I2C_ReceiveData(I2C, I2C_NACK, I2C_STOP);
            I2C_wait(I2C);
            ret = (uint8_t)I2C->DR;
            chk = 1;
        }
        else{
            I2C_ReceiveData(I2C,I2C_ACK,I2C_NSTOP);
            I2C_wait(I2C);
            ret = (uint8_t)I2C->DR;
            chk = 0;
        }
        rece_data[i++] = ret;
    }
    rece_data[i] = '\0';

    exit_point:
    //recvEnableInt(v);
    return i;
}