STM32G031とDS1307で時計プログラム(ソフトウェアシリアル出力100bps)(HAL)

STM32G031とDS1307で時計プログラム(ソフトウェアシリアル出力100bps)

x 過去ログを見よ
x PA_0をOBでGPIOに出来る人むけ
x STM32G031は、秋月で売っているSTM32G031J6M6の事

目的
秋月のDS1307ZN+T&R I-06950

//HAL_ds1307_S_SER_031_1

#include "mbed.h"


#define  TX_1()      HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_SET)
#define  TX_0()      HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_RESET)

//仮想シリアルへの一文字出力 1000bps
// 10 100bps
//  5
//  2
//  1 1000bps
int pc_putc(char ch)
{
    TX_1();
    TX_0();//Start
    HAL_Delay(9);

    for(int ii=0; ii<8; ii++) { //Data x 8
        if(   ((ch>>ii)&1) == 0 ){TX_0();} else {TX_1();}
        HAL_Delay(9);
    }; //for

    TX_1();//Stop
    HAL_Delay(9);

    return(0);
} //pc_putc


int main() {

    __HAL_RCC_GPIOA_CLK_ENABLE();

    GPIO_InitTypeDef GPIO_InitStruct = {0};

    GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
    GPIO_InitStruct.Pull = GPIO_PULLUP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    GPIO_InitStruct.Alternate = GPIO_AF6_I2C2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_0;
    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);


    __HAL_RCC_I2C2_CLK_ENABLE();

    I2C_HandleTypeDef hi2c2;

    hi2c2.Instance = I2C2;
    hi2c2.Init.Timing = 0x10707DBC;
    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_ENABLE);

    HAL_I2CEx_ConfigDigitalFilter(&hi2c2, 0);


    uint8_t data_read[7]; //リードバッファー
    uint8_t n1_8[8]; //バッファー

    while(1) {

//data_read[2] = 0x12;
//data_read[1] = 0x32;
//data_read[0] = 0x45;

        //時間の読み込み
        HAL_I2C_Master_Transmit(&hi2c2, (0xD0)     , (uint8_t*)"\000", 1, 3000);        
        HAL_I2C_Master_Receive( &hi2c2, (0xD0) | 1 , data_read,        7, 3000);

        //温度の表示
        pc_putc( '0'+(data_read[2] >> 4)  );
        pc_putc( '0'+(data_read[2] & 0xf) );
        pc_putc( '.' );
        pc_putc( '0'+(data_read[1] >> 4)  );
        pc_putc( '0'+(data_read[1] & 0xf) );
        pc_putc( '.' );
        pc_putc( '0'+(data_read[0] >> 4)  );
        pc_putc( '0'+(data_read[0] & 0xf) );
        pc_putc('\r');
        pc_putc('\n');

        // 1秒待つ
        HAL_Delay(10);
  
    }//while

}//main