请教输入usart输入打印问题

lhr090

我写了个usart输入的数据打印函数，为什么打印回来的会是5位数的数字啊

uint8_t USART_Scanf(uint32_t value)

{

  uint32_t index = 0;

uint32_t tmp[5] = {0, 0,0,0,0};

while (index < 5)

{

while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);

tmp[index++] = (USART_ReceiveData(USART1));

USART_SendData(USART3, tmp[index]);

if ((tmp[index - 1] < 0x30) || (tmp[index - 1] > 0x39))

{

printf("\n\rPlease enter valid number between 0 and 9");

index--;

}

}

index = (tmp[4] - 0x30) + ((tmp[3] - 0x30) * 10+(tmp[2] - 0x30) *100+(tmp[1] - 0x30) *1000+(tmp[0] - 0x30)*10000);

if (index > value)

{

    printf("\n\rPlease enter valid number between 0 and %d", value);

    return 0xFF;

}

return index;

}

lhr090

求回复

正点原子

仿真吧.

正点圆子

回复【楼主位】lhr090:
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你仔细看看你程序怎么写的撒