战舰V3开发板ADC采集数据写入SD卡txt文本文件

m32112 · 发表于 2017-7-14 16:10:33

如题，程序见下，问题是txt文本的数据不对。
#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "lcd.h"
#include "usart.h"
#include "sram.h"
#include "malloc.h"
#include "string.h"
#include "mmc_sd.h"
#include "ff.h"
#include "usmart.h"
#include "adc.h"
//////////
FIL fnew; /* file objects */
FATFS fs1; /* Work area (file system object) for logical drives */
FRESULT res;
extern UINT br, bw;             /* File R/W count */
BYTE buffer[4096]={0};             /* file copy buffer */
BYTE textFileBuffer[] = "Welcome ， today is a good day";

int main(void)
{

u8 t=0;

u16 adcx;
unsigned char temp0[400]={48,49,50,51,52,53,54,55,56,57,58}; //ASCII  实际为0 1 2 。。。
u16 temp1;

delay_init();            //延时函数初始化
NVIC_Configuration();    //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
uart_init(9600);      //串口初始化为9600
LED_Init();       //LED端口初始化
LCD_Init();    //初始化液晶
KEY_Init();    //初始化按键
   Adc_Init();       //ADC初始化
usmart_dev.init(72);
mem_init(SRAMIN); //初始化内部内存池

   f_mount(0,&fs1);
   res = f_open(&fnew, "0:newfile.txt", FA_CREATE_ALWAYS | FA_WRITE );
   if ( res == FR_OK )
{
res = f_write(&fnew, textFileBuffer, sizeof(textFileBuffer), &bw);
f_close(&fnew);
}

res = f_open(&fnew, "0:armfly.txt", FA_OPEN_EXISTING | FA_READ);
res = f_read(&fnew, buffer, sizeof(buffer), &br);
/* Close open files */
f_close(&fnew);

f_mount(0, NULL);


while(1)
{
if(KEY2==0)
{
for(t=0;t<128;t++)
{
adcx=Get_Adc_Average(ADC_Channel_0,5);
temp0[t]= (char)adcx*(3300.0/4096)+'0' ;

adcx=Get_Adc_Average(ADC_Channel_1,5);
temp0[t+128]= (char)adcx*(3300.0/4096)+'0' ;

adcx=Get_Adc_Average(ADC_Channel_2,5);
temp0[t+256]= (char)adcx*(3300.0/4096)+'0' ;

LED1=!LED1;

}

}

if(KEY1==0)
{

f_mount(0,&fs1);
res = f_open(&fnew, "0:ADC.txt", FA_CREATE_ALWAYS | FA_WRITE );
if ( res == FR_OK )
{
res = f_write(&fnew, temp0, sizeof(temp0), &bw);
f_close(&fnew);
}

f_close(&fnew);

            f_mount(0, NULL);

LED1=!LED1;

}

if(KEY0==0)
{


LED1=!LED1;
LCD_ShowString(0,250,200,16,16,buffer);

}

LED0=!LED0;

}
}
//注释：
KEY0 按下读取已有文本中字符串并显示。
KEY2按下为AD采集数据，转换放入char型数组
KEY1 按下char数组存入TXT。

上电运行后，按KEY1    SD卡中TXT文本中为  0 1 2 3 4 5 6 7 8 9 ：。正确；
                     按KEY2    AD采集后。在按KEY1。数据就不对了。