1.概述

本篇文章主要介紹如何使用e2studio對瑞薩進行DTC配置，并且對多通道ADC進行采集。

2.硬件準備

首先需要準備一個開發板，這里我準備的是芯片型號 R7FA2L1AB2DFL 的開發板。

3.新建工程

4.工程模板

5.保存工程路徑

6.芯片配置

本文中使用R7FA2L1AB2DFL來進行演示。

7

7.工程模板選擇

8.ADC配置

點擊Stacks->New Stack->Driver->Analog -> ADC Driver on r_adc。

9.ADC屬性配置

10.DTC配置

點擊Stacks->New Stack->Driver->Transfer-> Transfer Driver on r_dtc。

11.DTC屬性配置

12.設置e2studio堆棧

13.e2studio的重定向printf設置

C++ 構建->設置->GNU ARM Cross C Linker->Miscellaneous去掉Other linker flags中的 “--specs=rdimon.specs”

14.UART配置

點擊Stacks->New Stack->Driver->Connectivity -> UART Driver on r_sci_uart。

15.UART屬性配置

配置串口，用于打印數據。

16.printf輸出重定向到串口

打印最常用的方法是printf，所以要解決的問題是將printf的輸出重定向到串口，然后通過串口將數據發送出去。

注意一定要加上頭文件#include

#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_uart0_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;i++)>

17.代碼


#include "hal_data.h"
#include 
FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

fsp_err_t err = FSP_SUCCESS;
unsigned char send_buff[100];
volatile bool uart_send_complete_flag = false;
void user_uart_callback (uart_callback_args_t * p_args)
{
 	   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_uart0_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;ievent == ADC_EVENT_SCAN_COMPLETE )
	    {
        err = R_DTC_Reset( &g_transfer0_ctrl,
                           (void*)&R_ADC0->ADDR[0],     // reset source address
                           &adc_result_buffer[0],       // reset destination address
                           1 );                         // reset block size
        if( FSP_SUCCESS != err )
        {
            __BKPT(1);
        }
    }
}
void hal_entry(void)
{
  	  /* TODO: add your own code here */
   	  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);
       // Source is first ADC result register
       g_transfer0_cfg.p_info->p_src = (void*)&R_ADC0->ADDR[0];
       // Destination is results buffer
       g_transfer0_cfg.p_info->p_dest = &adc_result_buffer[0];
       /* Open the transfer instance with initial configuration. */
       err = R_DTC_Open(&g_transfer0_ctrl, &g_transfer0_cfg);
       /* Handle any errors. This function should be defined by the user. */
       assert(FSP_SUCCESS == err);
       /* Enable the DTC to handle incoming transfer requests. */
       err = R_DTC_Enable(&g_transfer0_ctrl);
       assert(FSP_SUCCESS == err);
while(1)
      {
          /* In software trigger mode, start a scan by calling R_ADC_ScanStart(). In other modes, enable external
           * triggers by calling R_ADC_ScanStart(). */
          err = R_ADC_ScanStart(&g_adc0_ctrl);
          assert(FSP_SUCCESS == err);
          printf("adc[0]_v=%f\n",(float)adc_result_buffer[0]/4095*3.3);
          printf("adc[1]_v=%f\n",(float)adc_result_buffer[1]/4095*3.3);
          printf("adc[2]_v=%f\n",(float)adc_result_buffer[2]/4095*3.3);
          R_BSP_SoftwareDelay(1000, BSP_DELAY_UNITS_MILLISECONDS); // NOLINT100->160
      }
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
};i++)>

18.多通道ADC采集通過DTC傳輸例程

現在設置3個ADC通道的輸入電壓如下所示。

ADC通道	管腳	輸入電壓
AN0	P000	GND(0V)
AN1	P001	VCC(3.3V)
AN2	P002	1.5V

19.演示效果

通過串口打印出的數據如下所示。

原創：By RA_Billy Xiao

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原文標題：瑞薩e2studio----基于DTC的多通道ADC采集

文章出處：【微信公眾號：RA生態工作室】歡迎添加關注！文章轉載請注明出處。