ISCS_CABINET_CONTROL/mainboard/components/i2c/user_i2c.c

#include "user_i2c.h"

/*******************************************************************************
  * @函数名称   user_i2c_dma_init
  * @函数说明   I2C DMA初始化
  * @输入参数  	txData：数据指针
               txSize：数据长度
  * @输出参数   无
  * @返回参数   无
*******************************************************************************/
static void user_i2c_dma_init(uint8_t *txData, uint32_t txSize)
{
    DMA_InitTypeDef DMA_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    USER_I2C_DMA_RCC_ENABLE;

    DMA_DeInit(USER_I2C_TX_DMA_CHANNEL);  // Channel for I2C_TX
    DMA_DeInit(USER_I2C_RX_DMA_CHANNEL);  // Channel for I2C_RX

    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USER_WS2812B_02_SPI->DATAR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)txData;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = txSize;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    DMA_Init(USER_I2C_TX_DMA_CHANNEL, &DMA_InitStructure);
    // 启用 DMA 传输完成中断
    DMA_ITConfig(USER_I2C_TX_DMA_CHANNEL, DMA_IT_TC, ENABLE);
    NVIC_InitStructure.NVIC_IRQChannel = USER_I2C_TX_DMA_IRQn;

    NVIC_Init(&NVIC_InitStructure);
}

/*******************************************************************************
  * @函数名称   user_i2c_Init
  * @函数说明   I2C初始化
  * @输入参数  	无
  * @输出参数   无
  * @返回参数   无
*******************************************************************************/
void user_i2c_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure={0};
	I2C_InitTypeDef I2C_InitTSturcture={0};

	USER_I2C_GPIO_RCC_ENABLE;
	USER_I2C_RCC_ENABLE;	
	USER_I2C_ENABLE;

	GPIO_InitStructure.GPIO_Pin = USER_I2C_SCL_PIN;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(USER_I2C_SCL_GPIO, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Pin = USER_I2C_SDA_PIN;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(USER_I2C_SDA_GPIO, &GPIO_InitStructure);

	I2C_InitTSturcture.I2C_ClockSpeed = 100000;
	I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;
	I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_16_9;
	I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;
	I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_Init(USER_I2C, &I2C_InitTSturcture);

	I2C_DMACmd(USER_I2C, ENABLE);

	I2C_Cmd(USER_I2C, ENABLE);
}