概述

本篇文章主要介绍如何使用e2studio对瑞萨RA2E1开发板进行数码管的驱动。

硬件准备

首先需要准备一个开发板，这里我准备的是芯片型号R7FA2E1A72DFL的开发板：

视频教程

https://www.bilibili.com/video/BV1pV411K78Y

数码管说明

查看手册可以得知，该数码管位共阴极。

同时查看原理图，可以看到数码管连接到MCU对应的管脚。

配置这些IO都为输出口，当红色为高电平，蓝色为低电平时候，LED亮起。

配置IO口

配置与数码管连接的IO都为Output mode (Initial Low)模式。

#数码管显示库 数码管的控制管教如下所示。

下图列出了数码管显示0到F时点亮的段。例如，在显示数字0的时候，除了中间的G段外其他的段都被点亮了。而数字1只点亮了B段和C段。

这里的项目位电子时钟，所以需要使用的字库为0-9。后续在添加温湿度的字库。 新建smg.c和smg.h文件，用于保存数码管的驱动程序。

smg.c

/*
 * smg.c
 *
 *  Created on: 2023年6月29日
 *      Author: a8456
 */

#include "smg.h"
#include "hal_data.h"


void smg_num(int num)
{
    switch(num)
    {
        case 0:
        {
            SMG_A_OPEN;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_OPEN;
            SMG_E_OPEN;
            SMG_F_OPEN;
            SMG_G_CLOSE;
            SMG_DP_CLOSE;
            break;
        }
        case 1:
        {
            SMG_A_CLOSE;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_CLOSE;
            SMG_E_CLOSE;
            SMG_F_CLOSE;
            SMG_G_CLOSE;
            SMG_DP_CLOSE;
            break;
        }
        case 2:
        {
            SMG_A_OPEN;
            SMG_B_OPEN;
            SMG_C_CLOSE;
            SMG_D_OPEN;
            SMG_E_OPEN;
            SMG_F_CLOSE;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }
        case 3:
        {
            SMG_A_OPEN;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_OPEN;
            SMG_E_CLOSE;
            SMG_F_CLOSE;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }
        case 4:
        {
            SMG_A_CLOSE;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_CLOSE;
            SMG_E_CLOSE;
            SMG_F_OPEN;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }
        case 5:
        {
            SMG_A_OPEN;
            SMG_B_CLOSE;
            SMG_C_OPEN;
            SMG_D_OPEN;
            SMG_E_CLOSE;
            SMG_F_OPEN;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }
        case 6:
        {
            SMG_A_OPEN;
            SMG_B_CLOSE;
            SMG_C_OPEN;
            SMG_D_OPEN;
            SMG_E_OPEN;
            SMG_F_OPEN;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }
        case 7:
        {
            SMG_A_OPEN;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_CLOSE;
            SMG_E_CLOSE;
            SMG_F_CLOSE;
            SMG_G_CLOSE;
            SMG_DP_CLOSE;
            break;
        }
        case 8:
        {
            SMG_A_OPEN;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_OPEN;
            SMG_E_OPEN;
            SMG_F_OPEN;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }
        case 9:
        {
            SMG_A_OPEN;
            SMG_B_OPEN;
            SMG_C_OPEN;
            SMG_D_OPEN;
            SMG_E_CLOSE;
            SMG_F_OPEN;
            SMG_G_OPEN;
            SMG_DP_CLOSE;
            break;
        }




    }



}

void smg_1(int num)
{
    SMG_1_OPEN;
    SMG_2_CLOSE;
    SMG_3_CLOSE;
    SMG_4_CLOSE;

    smg_num(num);

}


void smg_2(int num)
{
    SMG_1_CLOSE;
    SMG_2_OPEN;
    SMG_3_CLOSE;
    SMG_4_CLOSE;
    smg_num(num);

}



void smg_3(int num)
{
    SMG_1_CLOSE;
    SMG_2_CLOSE;
    SMG_3_OPEN;
    SMG_4_CLOSE;
    smg_num(num);

}



void smg_4(int num)
{

    SMG_1_CLOSE;
    SMG_2_CLOSE;
    SMG_3_CLOSE;
    SMG_4_OPEN;
    smg_num(num);

}


void smg_1_p(void)
{
    SMG_1_OPEN;
    SMG_2_CLOSE;
    SMG_3_CLOSE;
    SMG_4_CLOSE;

    SMG_A_OPEN;
    SMG_B_OPEN;
    SMG_C_CLOSE;
    SMG_D_CLOSE;
    SMG_E_OPEN;
    SMG_F_OPEN;
    SMG_G_OPEN;
    SMG_DP_CLOSE;

}





void smg_1_close(void)
{
    SMG_1_OPEN;
    SMG_2_CLOSE;
    SMG_3_CLOSE;
    SMG_4_CLOSE;

    SMG_A_CLOSE;
    SMG_B_CLOSE;
    SMG_C_CLOSE;
    SMG_D_CLOSE;
    SMG_E_CLOSE;
    SMG_F_CLOSE;
    SMG_G_CLOSE;
    SMG_DP_CLOSE;

}


void smg_2_close(void)
{
    SMG_1_CLOSE;
    SMG_2_OPEN;
    SMG_3_CLOSE;
    SMG_4_CLOSE;

    SMG_A_CLOSE;
    SMG_B_CLOSE;
    SMG_C_CLOSE;
    SMG_D_CLOSE;
    SMG_E_CLOSE;
    SMG_F_CLOSE;
    SMG_G_CLOSE;
    SMG_DP_CLOSE;
}



void smg_3_close(void)
{
    SMG_1_CLOSE;
    SMG_2_CLOSE;
    SMG_3_OPEN;
    SMG_4_CLOSE;

    SMG_A_CLOSE;
    SMG_B_CLOSE;
    SMG_C_CLOSE;
    SMG_D_CLOSE;
    SMG_E_CLOSE;
    SMG_F_CLOSE;
    SMG_G_CLOSE;
    SMG_DP_CLOSE;
}



void smg_4_close(void)
{
    SMG_1_CLOSE;
    SMG_2_CLOSE;
    SMG_3_CLOSE;
    SMG_4_OPEN;

    SMG_A_CLOSE;
    SMG_B_CLOSE;
    SMG_C_CLOSE;
    SMG_D_CLOSE;
    SMG_E_CLOSE;
    SMG_F_CLOSE;
    SMG_G_CLOSE;
    SMG_DP_CLOSE;
}








void smg_maohao_open(int num)
{

    SMG_1_CLOSE;
    SMG_2_CLOSE;

    if(num)//开启冒号
    {
        SMG_3_OPEN;
        SMG_4_OPEN;
        SMG_A_CLOSE;
        SMG_B_CLOSE;
        SMG_C_CLOSE;
        SMG_D_CLOSE;
        SMG_E_CLOSE;
        SMG_F_CLOSE;
        SMG_G_CLOSE;
        SMG_DP_OPEN;


    }
    else
    {
        SMG_3_CLOSE;
        SMG_4_CLOSE;

        SMG_A_CLOSE;
        SMG_B_CLOSE;
        SMG_C_CLOSE;
        SMG_D_CLOSE;
        SMG_E_CLOSE;
        SMG_F_CLOSE;
        SMG_G_CLOSE;
        SMG_DP_CLOSE;

    }
}

void ceshi_smg(void)
{
    for(int i=0;i< 40;i++)
    {
        if(i< 10)
        {   smg_1(i);}

        else if(i >=10&&i< 20)
        {    smg_2(i-10);}

        else if(i >=20&&i< 30)
        {    smg_3(i-20);}

        else if(i >=30&&i< 40)
        {   smg_4(i-30);}


        R_BSP_SoftwareDelay(100U, BSP_DELAY_UNITS_MILLISECONDS);
    }
     smg_maohao_open(1);





}

smg.h

/*
 * smg.h
 *
 *  Created on: 2023年6月29日
 *      Author: a8456
 */

#ifndef SMG_H_
#define SMG_H_
#define SMG_A_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_03, BSP_IO_LEVEL_HIGH)
#define SMG_B_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_05_PIN_00, BSP_IO_LEVEL_HIGH)
#define SMG_C_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_02_PIN_13, BSP_IO_LEVEL_HIGH)
#define SMG_D_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_08, BSP_IO_LEVEL_HIGH)
#define SMG_E_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_07, BSP_IO_LEVEL_HIGH)
#define SMG_F_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_02, BSP_IO_LEVEL_HIGH)
//旧版PCB
//#define SMG_G_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_00, BSP_IO_LEVEL_HIGH)
//新版PCB
#define SMG_G_OPEN  R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_00, BSP_IO_LEVEL_HIGH)
#define SMG_DP_OPEN R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_02_PIN_12, BSP_IO_LEVEL_HIGH)


#define SMG_A_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_03, BSP_IO_LEVEL_LOW)
#define SMG_B_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_05_PIN_00, BSP_IO_LEVEL_LOW)
#define SMG_C_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_02_PIN_13, BSP_IO_LEVEL_LOW)
#define SMG_D_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_08, BSP_IO_LEVEL_LOW)
#define SMG_E_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_07, BSP_IO_LEVEL_LOW)
#define SMG_F_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_02, BSP_IO_LEVEL_LOW)
//旧版PCB
//#define SMG_G_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_00, BSP_IO_LEVEL_LOW)
//新版PCB
#define SMG_G_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_00, BSP_IO_LEVEL_LOW)
#define SMG_DP_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_02_PIN_12, BSP_IO_LEVEL_LOW)

#define SMG_1_OPEN R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_04, BSP_IO_LEVEL_LOW)
#define SMG_2_OPEN R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_01, BSP_IO_LEVEL_LOW)
#define SMG_3_OPEN R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_00, BSP_IO_LEVEL_LOW)
//旧版PCB
//#define SMG_4_OPEN R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_00, BSP_IO_LEVEL_LOW)
//新版PCB
#define SMG_4_OPEN R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_00, BSP_IO_LEVEL_LOW)


#define SMG_1_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_04, BSP_IO_LEVEL_HIGH)
#define SMG_2_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_01, BSP_IO_LEVEL_HIGH)
#define SMG_3_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_01_PIN_00, BSP_IO_LEVEL_HIGH)
//旧版PCB
//#define SMG_4_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_00_PIN_00, BSP_IO_LEVEL_HIGH)
//新版PCB
#define SMG_4_CLOSE R_IOPORT_PinWrite(&g_ioport_ctrl, BSP_IO_PORT_04_PIN_00, BSP_IO_LEVEL_HIGH)


void smg_num(int num);

void smg_1(int num);
void smg_2(int num);
void smg_3(int num);
void smg_4(int num);

void smg_1_p(void);


void smg_1_close(void);
void smg_2_close(void);
void smg_3_close(void);
void smg_4_close(void);
void smg_maohao_open(int num);

void ceshi_smg(void);
#endif /* SMG_H_ */

添加完毕之后需要在主程序中加入对于的头文件。

#include "smg.h"

添加测试程序。

主程序

#include "hal_data.h"
#include < stdio.h >
#include "smg.h"
FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

fsp_err_t err = FSP_SUCCESS;
volatile bool uart_send_complete_flag = false;
/* Callback function */
void user_uart_callback(uart_callback_args_t *p_args)
{
    /* TODO: add your own code here */
    if(p_args- >event == UART_EVENT_TX_COMPLETE)
     {
         uart_send_complete_flag = true;
     }
}


#ifdef __GNUC__                                 //串口重定向
    #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
    #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif

PUTCHAR_PROTOTYPE
{
        err = R_SCI_UART_Write(&g_uart9_ctrl, (uint8_t *)&ch, 1);
        if(FSP_SUCCESS != err) __BKPT();
        while(uart_send_complete_flag == false){}
        uart_send_complete_flag = false;
        return ch;
}

int _write(int fd,char *pBuffer,int size)
{
    for(int i=0;i< size;i++)
    {
        __io_putchar(*pBuffer++);
    }
    return size;
}



/*******************************************************************************************************************//**
 * main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.  This function
 * is called by main() when no RTOS is used.
 **********************************************************************************************************************/
void hal_entry(void)
{
    /* TODO: add your own code here */

/**********************串口设置***************************************/
    /* Open the transfer instance with initial configuration. */
       err = R_SCI_UART_Open(&g_uart9_ctrl, &g_uart9_cfg);
       assert(FSP_SUCCESS == err);

/**********************数码管测试***************************************/
       ceshi_smg();

       while(1)
       {
       printf("hello world!n");
       R_BSP_SoftwareDelay(1000U, BSP_DELAY_UNITS_MILLISECONDS);
       }



#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

加入对于的数码管测试程序。

审核编辑：汤梓红