我正在尝试读取电位计的模拟电压值，将其转换为数字值，然后将其显示在atollic true studio中的终端上。我没有错误，但是在调试时没有任何结果显示。这是我的代码，非常感谢您的帮助！我还将添加示意图。
#include <stddef.h>
#include "stm32f10x.h"
#define RX_BUF_SIZE 80
volatile char RX_FLAG_END_LINE = 0;
volatile unsigned char RXi;
volatile char RXc;
char RX_BUF[RX_BUF_SIZE] = {'\0'};
volatile char buffer[80] = {'\0'};
void clear_RXBuffer(void) {
for (RXi=0; RXi<RX_BUF_SIZE; RXi++)
RX_BUF[RXi] = '\0';
RXi = 0;
}
void usart_init(void)
{
/* Enable USART1 and GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
/* NVIC Configuration */
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the USARTx Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Configure the GPIOs */
GPIO_InitTypeDef GPIO_InitStructure;
/* Configure USART1 Tx (PA.09) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART1 Rx (PA.10) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure the USART1 */
USART_InitTypeDef USART_InitStructure;
/* USART1 configuration ------------------------------------------------------*/
/* USART1 configured as follow:
- BaudRate = 9600 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
- USART Clock disabled
- USART CPOL: Clock is active low
- USART CPHA: Data is captured on the middle
- USART LastBit: The clock pulse of the last data bit is not output to
the SCLK pin
*/
USART_InitStructure.USART_BaudRate =9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
/* Enable USART1 */
USART_Cmd(USART1, ENABLE);
/* Enable the USART1 Receive interrupt: this interrupt is generated when the
USART1 receive data register is not empty */
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}
void USART1_IRQHandler(void)
{
if ((USART1->SR & USART_FLAG_RXNE) != (u16)RESET)
{
RXc = USART_ReceiveData(USART1);
RX_BUF[RXi] = RXc;
RXi++;
if (RXc != 13) {
if (RXi > RX_BUF_SIZE-1) {
clear_RXBuffer();
}
}
else {
RX_FLAG_END_LINE = 1;
}
//Echo
USART_SendData(USART1, RXc);
}
}
void USARTSend(const char *pucBuffer)
{
while (*pucBuffer)
{
USART_SendData(USART1, *pucBuffer++);
while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{
}
}
}
void SetSysClockTo72(void)
{
ErrorStatus HSEStartUpStatus;
/* SYSCLK, HCLK, PCLK2 and PCLK1 configuration -----------------------------*/
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig( RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if (HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
//FLASH_PrefetchBufferCmd( FLASH_PrefetchBuffer_Enable);
/* Flash 2 wait state */
//FLASH_SetLatency( FLASH_Latency_2);
/* HCLK = SYSCLK */
RCC_HCLKConfig( RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config( RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config( RCC_HCLK_Div2);
/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(0x00010000, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd( ENABLE);
/* Wait till PLL is ready */
while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
/* Select PLL as system clock source */
RCC_SYSCLKConfig( RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while (RCC_GetSYSCLKSource() != 0x08)
{
}
}
else
{ /* If HSE fails to start-up, the application will have wrong clock configuration.
User can add here some code to deal with this error */
/* Go to infinite loop */
while (1)
{
}
}
}
int main(void)
{
// Set System clock
SetSysClockTo72();
/* Initialize LED which connected to PC13 */
GPIO_InitTypeDef GPIO_InitStructure;
// Enable PORTC Clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Configure the GPIO_LED pin */
// Initialize USART
usart_init();
USARTSend(" Hello.\r\nUSART1 is ready.\r\n");
ADC_InitTypeDef ADC_InitStructure;
/* Enable ADC1 and GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);
/* Configure PA.01 (ADC Channel1) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE; // Single Channel
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; // Scan on Demand
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel1 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_55Cycles5);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibaration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
while(1)
{
if (RX_FLAG_END_LINE == 1) {
// Reset END_LINE Flag
RX_FLAG_END_LINE = 0;
USARTSend("\r\nI has received a line:\r\n");
USARTSend(RX_BUF);
USARTSend("\r\n");
clear_RXBuffer();
if (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == SET)
{
int adc;
adc = ADC_GetConversionValue(ADC1);
char buffer[2];
buffer[0] = '0' + adc;
buffer[1] = '\0';
USARTSend(buffer);
/* Probably overkill */
ADC_ClearFlag(ADC1, ADC_FLAG_EOC);
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
}
} // sourcer32@gmail.com
while(1); /* does not exit - kind of important */
}
}