RA生态之基于 DTC 的多通道 ADC 采集

Posted 2022-05-19 衾许°

配置ADC：Stacks->New Stack-> Analog -> ADC Driver on r_adc

 

配置ADC：Stacks->New Stack->Transfer-> Transfer Driver on r_dtc

 堆栈设置

 示例代码:

#include "hal_data.h"
#include <stdio.h>

FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

/*串口发送标志位*/
fsp_err_t err = FSP_SUCCESS;
unsigned char send_buff[100];
volatile bool uart_send_complete_flag = false;

/******************************************************************/
/*串口重定向*/
int fputc(int ch, FILE *f)

    err = R_SCI_UART_Write(&g_uart0_ctrl, (uint8_t *)&ch, 1);
    if(FSP_SUCCESS != err) __BKPT();
    while(uart_send_complete_flag == false)
    uart_send_complete_flag = false;
    return 0;

/*串口回调函数*///函数功能把串口接收到的数据存到
void user_uart_callback (uart_callback_args_t * p_args)

    /*如果串口发送数据完成*/
    if(p_args->event == UART_EVENT_TX_COMPLETE)
    
        uart_send_complete_flag = true;
    

/******************************************************************/
uint16_t adc_result_buffer[3];
void adc_callback(adc_callback_args_t *p_args)

    if( p_args->event == ADC_EVENT_SCAN_COMPLETE)
    
        err = R_DTC_Reset( &g_transfer0_ctrl,(void*)&R_ADC0->ADDR[0],&adc_result_buffer[0],1 );
    
    if( FSP_SUCCESS != err )
    
        __BKPT(1);
    

void hal_entry(void)

        err = R_SCI_UART_Open(&g_uart0_ctrl, &g_uart0_cfg);
        assert(FSP_SUCCESS == err);
        adc_status_t adc_status;
        err = R_ADC_Open(&g_adc0_ctrl, &g_adc0_cfg);
        assert(FSP_SUCCESS == err);
        err = R_ADC_StatusGet (&g_adc0_ctrl, &adc_status);
        assert(FSP_SUCCESS == err);
        err = R_ADC_ScanCfg(&g_adc0_ctrl, &g_adc0_channel_cfg);
        assert(FSP_SUCCESS == err);
        g_transfer0_cfg.p_info->p_src = (void*)&R_ADC0->ADDR[0];
        g_transfer0_cfg.p_info->p_dest = &adc_result_buffer[0];
        err = R_DTC_Open(&g_transfer0_ctrl, &g_transfer0_cfg);
        assert(FSP_SUCCESS == err);
        err = R_DTC_Enable(&g_transfer0_ctrl);
        assert(FSP_SUCCESS == err);
        while(1)
        
            err = R_ADC_ScanStart(&g_adc0_ctrl);
            assert(FSP_SUCCESS == err);
            printf("adc[0]_v=%f\\r\\n",(float)adc_result_buffer[0]/4095*3.3);
            printf("adc[1]_v=%f\\r\\n",(float)adc_result_buffer[1]/4095*3.3);
            printf("adc[2]_v=%f\\r\\n",(float)adc_result_buffer[2]/4095*3.3);
            R_BSP_SoftwareDelay(1000, BSP_DELAY_UNITS_MILLISECONDS);
        
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif

 例程现象：比如你拿根杜邦线接P000，P000adc采集到的电压值就会串口打印出来