tuber/desk/modules/ssd_1327/i2c_bridge.cpp

#include "i2c_bridge.h"
#include "oled_config.h"


I2C_HandleTypeDef hi2c2;


//
void i2c_bridge_init(void)
{
    hi2c2.Instance = I2C2;
    hi2c2.Init.Timing = 0x4052060F; //0x00303D5B;
    hi2c2.Init.OwnAddress1 = 0;
    hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c2.Init.OwnAddress2 = 0;
    hi2c2.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
    hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    HAL_I2C_Init(&hi2c2);

    HAL_I2CEx_ConfigAnalogFilter(&hi2c2, I2C_ANALOGFILTER_DISABLE);

    HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0);

    // TODO Разобраться
    //HAL_I2CEx_EnableFastModePlus(I2C_FASTMODEPLUS_I2C2);
}


//
I2C_HandleTypeDef *i2c_get_bridge(void)
{
    return &hi2c2;
}


//
void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    RCC_PeriphCLKInitTypeDef  RCC_PeriphCLKInitStruct = {0};
    
    HAL_I2C_DeInit(i2cHandle);
    
    if(i2cHandle->Instance==I2C2)
    {
        __HAL_RCC_GPIOA_CLK_ENABLE();
        __HAL_RCC_GPIOC_CLK_ENABLE();
    
        RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_I2C2;
        RCC_PeriphCLKInitStruct.I2c1ClockSelection = RCC_I2C2CLKSOURCE_SYSCLK;
        HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct);
        
        // I2C2 SDA
        GPIO_InitStruct.Pin = GPIO_PIN_8;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
        GPIO_InitStruct.Pull = GPIO_PULLUP;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
        GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
        
        // I2C2 CLCK
        GPIO_InitStruct.Pin = GPIO_PIN_4;
        GPIO_InitStruct.Alternate = GPIO_AF4_I2C2;
        HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
        
        __HAL_RCC_I2C2_CLK_ENABLE();
    }
}


//
void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{
    if(i2cHandle->Instance==I2C2)
    {
        __HAL_RCC_I2C2_CLK_DISABLE();
        HAL_GPIO_DeInit(GPIOA, GPIO_PIN_8);
        HAL_GPIO_DeInit(GPIOC, GPIO_PIN_4);
    }
}