本帖最后由 joypark159 于 2013-8-7 17:42 编辑
用串口输入也总是在红色的句子那边扫描，端口配置都没问题
uint8_t USART_Scanf(uint32_t value)
{
uint32_t index = 0;
uint32_t tmp[2] = {0, 0};
while (index < 2)
{
/* Loop until RXNE = 1 */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET)
{}
tmp[index++] = (USART_ReceiveData(USART1));
if ((tmp[index - 1] < 0x30) || (tmp[index - 1] > 0x39))
{
printf("\n\rPlease enter valid number between 0 and 9");
index--;
}
}
/* Calculate the Corresponding value */
index = (tmp[1] - 0x30) + ((tmp[0] - 0x30) * 10);
/* Checks */
if (index > value)
{
printf("\n\rPlease enter valid number between 0 and %d", value);
return 0xFF;
}
return index;
} |
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