串口调试住手输入到单片机的数据是以什么形式保存在寄存器中的？

好土豆 · 发表于 2015-10-18 09:00:06

[mw_shl_code=c,true]#include "stm32f10x.h" #include "sys.h" #include "stdio.h" void usart1(void) { GPIO_InitTypeDef GPIO_InitStruct; USART_InitTypeDef USART_InitStruct; NVIC_InitTypeDef NVIC_InitStruct; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); USART_DeInit(USART1); GPIO_InitStruct.GPIO_Mode=GPIO_Mode_AF_PP; GPIO_InitStruct.GPIO_Pin=GPIO_Pin_9; GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStruct); GPIO_InitStruct.GPIO_Mode=GPIO_Mode_IN_FLOATING; GPIO_InitStruct.GPIO_Pin=GPIO_Pin_10; GPIO_InitStruct.GPIO_Speed=GPIO_Speed_50MHz; GPIO_Init(GPIOA,&GPIO_InitStruct); USART_InitStruct.USART_BaudRate=115200; USART_InitStruct.USART_HardwareFlowControl=USART_HardwareFlowControl_None; USART_InitStruct.USART_Mode=USART_Mode_Rx | USART_Mode_Tx; USART_InitStruct.USART_Parity=USART_Parity_No; USART_InitStruct.USART_StopBits=USART_StopBits_1; USART_InitStruct.USART_WordLength=USART_WordLength_8b; USART_Init(USART1,&USART_InitStruct); NVIC_InitStruct.NVIC_IRQChannel=USART1_IRQn; NVIC_InitStruct.NVIC_IRQChannelCmd=ENABLE; NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority=3; NVIC_InitStruct.NVIC_IRQChannelSubPriority=3; NVIC_Init(&NVIC_InitStruct); USART_ITConfig(USART1,USART_IT_RXNE,ENABLE); USART_Cmd(USART1,ENABLE); } void USART1_IRQHandler(void) { u8 res; u8 temp; if(USART_GetITStatus(USART1,USART_IT_RXNE)) { res=USART_ReceiveData(USART1); temp=res+0x01; USART_SendData(USART1,temp); } } int main(void) { NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); usart1(); while(1); } [/mw_shl_code]

代码应该怎么改才能实现把输入的十六进制数加1，例如1的ASCII码为49，十六进制为31，我输入31，输出应该是2。