【RA4L1-SENSOR】+ RA4L1-SENSOR开发板之电压测量仪使用LCD显示电压你们都学不会的

jf_43382582

2025-6-13 11:30:57

1376 开发板 lcd

ADC电压采集

拿到瑞萨的RA4L1-SENSOR开发板很久了，今天来使用ADC测量下电压，并通过LCD屏显示电压值。

使用RA4L1上的A0通道的ADC。如下图所示：

1。打开瑞萨的smart配置软件。

取名RA4L1_template

2。选择芯片型号

3。继续

4。继续

5。继续

6。生成代码

配置ADC001

7。打开KEIL，编译工程

添加核心代码

#include "hal_data.h"

#include "usart9.h"

#include "esp8266.h"

FSP_CPP_HEADER

void R_BSP_WarmStart(bsp_warm_start_event_t event);

FSP_CPP_FOOTER

void GLCD_Init(void);

void disp_0(void);

void disp_1(void);

void disp_2(void);

void disp_3(void);

void disp_4(void);

void disp_5(void);

void disp_6(void);

void disp_7(void);

void disp_8(void);

void disp_9(void);

void disp_num(uint8_t channel, uint8_t num);

void disp_num1(uint8_t channel, uint8_t num);

void disp_COL1(void);

void disp_DOT1(void);

void disp_Battery(uint8_t num);

void GLCD_OFF(void);

void GLCD_ON(void);

void ADC_25(void);

volatile bool scan_complete_flag = false;

void adc_callback (adc_callback_args_t * p_args)

{

//宏将告知编译器回调函数不使用参数 p_args，从而避免编译器发出警告，

FSP_PARAMETER_NOT_USED(p_args);

scan_complete_flag = true;

}

double a0,a5;

uint16_t adc_data1=0;

uint16_t adc_data2=0;

/*******************************************************************************************************************//**

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)

{

fsp_err_t err = FSP_SUCCESS;

/* TODO: add your own code here */

UART9_Init();UART1_Init();

ADC_25();
GLCD_Init();

GLCD_OFF();

disp_Battery(4);

uint8_t rtc_second = 34; //秒

uint8_t rtc_minute = 43; //分

uint8_t rtc_hour = 10; //时

uint8_t rtc_day = 0; //日

uint8_t rtc_month = 0; //月

uint16_t rtc_year = 0; //年

uint8_t rtc_week = 0; //周

uint16_t year = 0;

disp_Battery(4);
//disp_num(1, rtc_hour/10);disp_num(2, rtc_hour%10);
disp_num(3, rtc_minute/10);disp_num(4, rtc_minute%10);
disp_num(5, rtc_second/10);disp_num(6, rtc_second%10);

uint8_t voltage_1   = 0;         //电压整数
uint8_t voltage_2   = 0;         //电压小数

printf("测量ADC 001通道电压值\\r\\n");

while(1)
{
    /* Enable scan triggering from ELC events. */
    (void) R_ADC_ScanStart(&g_adc0_ctrl);
    scan_complete_flag = false;
    while (!scan_complete_flag)
    {
        /* Wait for callback to set flag. */
    }

    err = R_ADC_Read(&g_adc0_ctrl, ADC_CHANNEL_1, &adc_data1);
    assert(FSP_SUCCESS == err);
    a0=(double)(adc_data1/4095.0)*3.3;
	adc_data2=(double)a0*100;
	voltage_1 = adc_data2/100;
	voltage_2 = adc_data2%100;
	disp_num(4, voltage_1%10);
	disp_num(5, voltage_2/10);disp_num(6, voltage_2%10);
	printf("P003(AN001)=%d,voltage=%f\\n",adc_data1,a0);


    R_BSP_SoftwareDelay (1000, BSP_DELAY_UNITS_MILLISECONDS);
}