STM32L010とMbedでI2Cスレーブで遊ぶ(受信)(STM32L010F4P6)HAL



x Mbed2リビジョン125


目的
I2Cスレーブのテスト



参考



https://gsmcustomeffects.hatenablog.com/entry/2017/04/03/023111




![o_con139.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/840352/1c0ef419-97e5-111b-ad98-4155ad2cf2b4.jpeg)





```c++



//I2C_SLAVE_TEST1

#include "mbed.h"

//シリアルの初期化
RawSerial pc(PA_2, PA_3); //010

//I2Cアドレス
const int ADDR = 0x80; //  address

//I2Cの構造体
I2C_HandleTypeDef hi2c1;

//I2Cの初期化
void I2C_INIT1()
{
    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF1_I2C1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    __HAL_RCC_I2C1_CLK_ENABLE();

    //I2C_HandleTypeDef hi2c1;

    hi2c1.Instance = I2C1;
    hi2c1.Init.Timing = 0x00000708;
    hi2c1.Init.OwnAddress1 = ADDR;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    HAL_I2C_Init(&hi2c1);

    HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE);

    HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0);

}//I2C_INIT1

//GPIOの初期化
void GPIO_INIT1()
{

    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_4;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}//GPIO_INIT1

//メイン関数
int main()
{
    wait_ms(2); //HAL_Delay()になぜか失敗するので呼び出す

    //I2Cの初期化
    I2C_INIT1();

    //GPIOの初期化
    GPIO_INIT1();

    uint8_t aRxBuffer[1] = {0};
    char *str1;

    //無限ループ
    while (1) {

        aRxBuffer[0] = 0 ;

        if(HAL_I2C_Slave_Receive(&hi2c1,(uint8_t*)aRxBuffer, 1, 1000) == HAL_OK) {
            str1="OK";
        } else {
            str1="NG";
        }
        
        //ステータスの表示
        pc.printf("I2C Status: %s\r\n", str1);
        
        //I2Cスレーブの受信データの表示
        pc.printf("\tRead A: %d\r\n", aRxBuffer[0]);
        

        HAL_Delay(500);//0.5秒待つ

    }//while

}//main

//容量削減
void error(const char* format, ...){}






```


I2Cマスター STM32L010F4P6



```c++


//I2C_OUT_TEST1

#include "mbed.h"

//I2Cアドレス
const int ADDR = 0x80; //  address

//I2Cの構造体
I2C_HandleTypeDef hi2c1;

//I2Cの初期化
void I2C_INIT1()
{
    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF1_I2C1;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    __HAL_RCC_I2C1_CLK_ENABLE();

    //I2C_HandleTypeDef hi2c1;

    hi2c1.Instance = I2C1;
    hi2c1.Init.Timing = 0x00000708;
    hi2c1.Init.OwnAddress1 = 0;
    hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c1.Init.OwnAddress2 = 0;
    hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
    hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    HAL_I2C_Init(&hi2c1);

    HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE);

    HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0);

}//I2C_INIT1

//GPIOの初期化
void GPIO_INIT1()
{
    
    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct = {0};
    GPIO_InitStruct.Pin = GPIO_PIN_4;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

}//GPIO_INIT1

//メイン関数
int main()
{
    wait_ms(2); //HAL_Delay()になぜか失敗するので呼び出す

    //I2Cの初期化
    I2C_INIT1();

    //GPIOの初期化
    GPIO_INIT1();

    //無限ループ
    while (1) {

        //I2Cに1を送信
        HAL_I2C_Master_Transmit(&hi2c1,ADDR, (uint8_t *)"\001", 1, 3000); //data 1
        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
        HAL_Delay(1000);//1秒待つ

        //I2Cに1を送信
        HAL_I2C_Master_Transmit(&hi2c1, ADDR, (uint8_t *)"\002", 1, 3000); //data 2
        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);
        HAL_Delay(1000);//1秒待つ

    }//while

}//main





```