stm32的mini板，fatfs移植，txt存储ad采集信息

joycevvz

[mw_shl_code=c,true]int main(void) { u16 adcx1; u16 adcx2; u16 adcx3; u16 adcx4; float temp1; u32 total,free; u16 pointer=0; u8 *write_buf="0000,0000,0000,0000"; u8 rxlen=21; FIL file; //???????ó FRESULT res; NVIC_Configuration(); delay_init(); //???±?????????? uart_init(9600); //?®??????????9600 exfuns_init(); //??fatfs?à??±????ê?????? LED_Init(); //LED?????? Adc_Init(); usmart_dev.init(72); mem_init(); //???????????? while(SD_Initialize()) //?ì??SD?¨ { } exfuns_init(); //??fatfs?à??±????ê?????? f_mount(fs[0],"0:",1); //????SD?¨ f_mount(fs[1],"1:",1); //????FLASH. while(exf_getfree("0",&total,&free)) //????SD?¨??×??????????à???? { } res=f_open(&file, "0:/ad.txt", FA_OPEN_ALWAYS | FA_WRITE); //?ò??ad.txt???????????????????????ò???¨???????????? pointer=file.fsize; //?????????ó?? res=f_lseek(&file,pointer);//???????????? res=f_write(&file,write_buf,rxlen,&br);//?ò??????????ad×?·??® res=f_close(&file); //??±??ò???????? myfree(write_buf); while(1) { adcx1=Get_Adc_Average(ADC_Channel_11,10)*3300/4096;//PC1 adc write_buf[0]=adcx1/1000+0x30; write_buf[1]=adcx1%1000/100+0x30; write_buf[2]=adcx1%100/10+0x30; write_buf[3]=adcx1%10+0x30; write_buf[4]=','; adcx2=Get_Adc_Average(ADC_Channel_12,10)*3300/4096;//PC2 adc write_buf[5]=adcx2/1000+0x30; write_buf[6]=adcx2%1000/100+0x30; write_buf[7]=adcx2%100/10+0x30; write_buf[8]=adcx2%10+0x30; write_buf[9]=','; adcx3=Get_Adc_Average(ADC_Channel_13,10)*3300/4096;//PC3 adc write_buf[10]=adcx3/1000+0x30; write_buf[11]=adcx3%1000/100+0x30; write_buf[12]=adcx3%100/10+0x30; write_buf[13]=adcx3%10+0x30; write_buf[14]=','; adcx4=Get_Adc_Average(ADC_Channel_14,10)*3300/4096;//PC4 adc write_buf[15]=adcx4/1000+0x30; write_buf[16]=adcx4%1000/100+0x30; write_buf[17]=adcx4%100/10+0x30; write_buf[19]=adcx4%10+0x30; write_buf[20]='\r'; //???????? write_buf[21]='\n'; delay_ms(100); res=f_open(&file, "0:/ad.txt", FA_OPEN_ALWAYS | FA_WRITE); //?ò??ad.txt???????????????????????ò???¨???????????? pointer=file.fsize; //?????????ó?? res=f_lseek(&file,pointer);//???????????? res=f_write(&file,write_buf,rxlen,&br);//?ò??????????ad×?·??® res=f_close(&file); //??±??ò???????? myfree(write_buf); delay_ms(100); } } [/mw_shl_code]

存储的数据一直是0000，0000,0000,0000

miaoguoqiang

需要不停的myfree(write_buf)吗，可以把write_buf定义成一个数组，而不是一个野指针

正点原子

仿真看看write_buf数据是否正常。

joycevvz

回复【3楼】miaoguoqiang:
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把write_buf定义成数组就好了，谢啦，但是现在又发现只能存储64k的数据，怎样可以使存储的数据多一些呀

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