stm32f4中fwrite函数的输入只能为16进制吗？

qjj88798014 · 发表于 2017-9-28 17:02:20

如题，本人小白，现在项目上需要用stm32向SD卡内写数据，因此用到FATFS里的fwrite函数，但是无法做到输入10进制数并写进SD卡，只能输入16进制，写文件的主要代码如下:
int main()
{
u8 offline_cnt=0;
u8 tct=0;
u8 USB_STA;
u8 Divece_STA;
  u8 i=0;
  u16 j=0;
  u32 free,total;

SysTick_Init(168);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
LED_Init();
KEY_Init();
USART3_Init(9600);
TFTLCD_Init();
EN25QXX_Init();
my_mem_init(SRAMIN);

FRONT_COLOR=RED;

while(SD_Init())
{
printf("SD Card Error!\r\n");
delay_ms(500);
}

FRONT_COLOR=BLUE;
printf("SD Card OK!\r\n");

FATFS_Init();
    f_mount(fs[0],"0:",1);

while(FATFS_GetFree("0:",&total,&free))
{
delay_ms(200);
}
FRONT_COLOR=BLUE;

printf("SD Total Size: %ldMB\r\n",total>>10);
printf("SD  Free Size: %ldMB\r\n",free>>10);

FATFS fs;
  FIL fsrc;
  FRESULT res;

UINT  btw = 512;
  UINT  bw;
u16 WriteBuffer[3] = {0x31,0x32,0x33};
u8 ReadBuffer[512];

res = f_open(&fsrc,"0:/test.txt",FA_CREATE_ALWAYS|FA_WRITE);

if(res == FR_OK)
{
f_lseek(&fsrc,fsrc.fsize);

f_write(&fsrc,WriteBuffer,sizeof(WriteBuffer),&bw);

LCD_ShowString(10,200,tftlcd_data.width,tftlcd_data.height,16,"Write Success");
}
else
{
LCD_ShowString(10,200,tftlcd_data.width,tftlcd_data.height,16,"Write Error");
}
f_close(&fsrc);

res = f_open(&fsrc,"0:/test.txt",FA_READ);
f_read(&fsrc,ReadBuffer,sizeof(ReadBuffer),&br);
f_close(&fsrc);
LCD_ShowString(10,240,tftlcd_data.width,tftlcd_data.height,16,"SD Card TXT:");

LCD_ShowString(10,260,tftlcd_data.width,tftlcd_data.height,16,ReadBuffer);

USBD_Init(&USB_OTG_dev,USB_OTG_FS_CORE_ID,&USR_desc,&USBD_MSC_cb,&USR_cb);

while(1)
{
if(USB_STA!=USB_STATUS_REG)
{
Divece_STA=bDeviceState;
}
tct++;
if(tct==200)
{
tct=0;
led2=1;
led1=!led1;
if(USB_STATUS_REG&0x10)
{
offline_cnt=0;
bDeviceState=1;
}else
{
offline_cnt++;
if(offline_cnt>10)bDeviceState=0;
}
USB_STATUS_REG=0;
}
delay_ms(10);
}
}

输入的数组为WriteBuffer，0x31~0x33对应的是按键1~3，现在想做到输入量就是1~3，同时也能通过fwrite函数写在SD卡里面去，

求大佬指教！