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- 2016-8-3
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5金钱
自己画的最小系统,用st官网例程“UART_TwoBoards_ComIT”串口1,pa9、pa10可以正常传输,改为uart2后时钟发不了数据,pa2是一直低电平,pa3一直高电平。
/////////////////////////////////////////主程序//////////////////////////////////////////////////////////////////////
/**
******************************************************************************
* @file UART/UART_TwoBoards_ComIT/Src/main.c
* @author MCD Application Team
* @version V1.7.0
* @date 31-May-2016
* @brief This sample code shows how to use STM32L0xx UART HAL API to transmit
* and receive a data buffer with a communication process based on
* IT transfer.
* The communication is done using 2 Boards.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32L0xx_HAL_Examples
* @{
*/
/** @addtogroup UART_TwoBoards_ComIT
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
//#define TRANSMITTER_BOARD
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* UART handler declaration */
UART_HandleTypeDef UartHandle;
__IO ITStatus UartReady = RESET;
/* Buffer used for transmission */
//uint8_t aTxBuffer[] = " ****UART_TwoBoards_ComIT**** ****UART_TwoBoards_ComIT**** ****UART_TwoBoards_ComIT**** ";
uint8_t aTxBuffer[] = "123456789\r\n";
/* Buffer used for reception */
uint8_t aRxBuffer[RXBUFFERSIZE];
/* Private function prototypes -----------------------------------------------*/
static void SystemClock_Config(void);
static void Error_Handler(void);
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* STM32L0xx HAL library initialization:
- Configure the Flash prefetch, Flash preread and Buffer caches
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 32 Mhz */
SystemClock_Config();
/*##-1- Configure the UART peripheral ######################################*/
/* Put the USART peripheral in the Asynchronous mode (UART Mode) */
/* UART1 configured as follow:
- Word Length = 8 Bits
- Stop Bit = One Stop bit
- Parity = None
- BaudRate = 9600 baud
- Hardware flow control disabled (RTS and CTS signals) */
UartHandle.Instance = USARTx2;
UartHandle.Init.BaudRate = 9600;
UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
UartHandle.Init.StopBits = UART_STOPBITS_1;
UartHandle.Init.Parity = UART_PARITY_NONE;
UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
UartHandle.Init.Mode = UART_MODE_TX_RX;
if(HAL_UART_Init(&UartHandle) != HAL_OK)
{
Error_Handler();
}
while (1)
{
if(HAL_UART_Transmit_IT(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}
// /*##-3- Wait for the end of the transfer ###################################*/
// while (UartReady != SET)
// {
// }
//
// /* Reset transmission flag */
// UartReady = RESET;
}
/* Infinite loop */
while (1)
{
#ifdef TRANSMITTER_BOARD
/*##-2- Start the transmission process #####################################*/
/* While the UART in reception process, user can transmit data through
"aTxBuffer" buffer */
if(HAL_UART_Transmit_IT(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}
/*##-3- Wait for the end of the transfer ###################################*/
while (UartReady != SET)
{
}
/* Reset transmission flag */
UartReady = RESET;
/*##-4- Put UART peripheral in reception process ###########################*/
if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
{
Error_Handler();
}
#else
/* The board receives the message and sends it back */
/*##-2- Put UART peripheral in reception process ###########################*/
if(HAL_UART_Receive_IT(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE) != HAL_OK)
{
Error_Handler();
}
/*##-3- Wait for the end of the transfer ###################################*/
while (UartReady != SET)
{
}
/* Reset transmission flag */
UartReady = RESET;
/*##-4- Start the transmission process #####################################*/
/* While the UART in reception process, user can transmit data through
"aTxBuffer" buffer */
if(HAL_UART_Transmit_IT(&UartHandle, (uint8_t *)aRxBuffer, RXBUFFERSIZE)!= HAL_OK)
// if(HAL_UART_Transmit_IT(&UartHandle, (uint8_t*)aTxBuffer, TXBUFFERSIZE)!= HAL_OK)
{
Error_Handler();
}
#endif /* TRANSMITTER_BOARD */
/*##-5- Wait for the end of the transfer ###################################*/
while (UartReady != SET)
{
}
/* Reset transmission flag */
UartReady = RESET;
/*##-6- Compare the sent and received buffers ##############################*/
// if(Buffercmp((uint8_t*)aTxBuffer,(uint8_t*)aRxBuffer,RXBUFFERSIZE))
// {
// Error_Handler();
// }
//
}
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSI)
* SYSCLK(Hz) = 32000000
* HCLK(Hz) = 32000000
* AHB Prescaler = 1
* APB1 Prescaler = 1
* APB2 Prescaler = 1
* HSI Frequency(Hz) = 16000000
* PLL_MUL = 4
* PLL_DIV = 2
* Flash Latency(WS) = 1
* Main regulator output voltage = Scale1 mode
* @param None
* @retval None
*/
static void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct;
RCC_OscInitTypeDef RCC_OscInitStruct;
/* Enable Power Control clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* The voltage scaling allows optimizing the power consumption when the device is
clocked below the maximum system frequency, to update the voltage scaling value
regarding system frequency refer to product datasheet. */
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/* Enable HSI Oscillator and activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSEState = RCC_HSE_OFF;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
RCC_OscInitStruct.HSICalibrationValue = 0x10;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1);
}
/**
* @brief Tx Transfer completed callback
* @param UartHandle: UART handle.
* @note This example shows a simple way to report end of IT Tx transfer, and
* you can add your own implementation.
* @retval None
*/
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle)
{
/* Set transmission flag: trasfer complete*/
UartReady = SET;
}
/**
* @brief Rx Transfer completed callback
* @param UartHandle: UART handle
* @note This example shows a simple way to report end of IT Rx transfer, and
* you can add your own implementation.
* @retval None
*/
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *UartHandle)
{
/* Set transmission flag: trasfer complete*/
UartReady = SET;
}
/**
* @brief UART error callbacks
* @param UartHandle: UART handle
* @note This example shows a simple way to report transfer error, and you can
* add your own implementation.
* @retval None
*/
void HAL_UART_ErrorCallback(UART_HandleTypeDef *UartHandle)
{
while(1)
{
}
}
/**
* @brief Compares two buffers.
* @param pBuffer1, pBuffer2: buffers to be compared.
* @param BufferLength: buffer's length
* @retval 0 : pBuffer1 identical to pBuffer2
* >0 : pBuffer1 differs from pBuffer2
*/
static uint16_t Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
while (BufferLength--)
{
if ((*pBuffer1) != *pBuffer2)
{
return BufferLength;
}
pBuffer1++;
pBuffer2++;
}
return 0;
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
while(1)
{
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
//////////////////////////////////main.h///主要修改的文件////////////////////////////////////////////////////
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __MAIN_H
#define __MAIN_H
/* Includes ------------------------------------------------------------------*/
#include "stm32l0xx_hal.h"
#include "stm32l0538_discovery.h"
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* User can use this section to tailor USARTx/UARTx instance used and associated
resources */
/* Definition for USARTx clock resources */
#define USARTx2 USART2
#define USARTx2_CLK_ENABLE() __HAL_RCC_USART2_CLK_ENABLE();
#define USARTx2_RX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define USARTx2_TX_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define USARTx2_FORCE_RESET() __HAL_RCC_USART2_FORCE_RESET()
#define USARTx2_RELEASE_RESET() __HAL_RCC_USART2_RELEASE_RESET()
/* Definition for USARTx Pins */
#define USARTx2_TX_PIN GPIO_PIN_2
#define USARTx2_TX_GPIO_PORT GPIOA
#define USARTx2_TX_AF GPIO_AF4_USART2
#define USARTx2_RX_PIN GPIO_PIN_3
#define USARTx2_RX_GPIO_PORT GPIOA
#define USARTx2_RX_AF GPIO_AF4_USART2
/* Definition for USARTx's NVIC */
#define USARTx2_IRQn USART2_IRQn
#define USARTx_IRQHandler USART2_IRQHandler
/* Size of Trasmission buffer */
#define TXBUFFERSIZE (COUNTOF(aTxBuffer) - 1)
/* Size of Reception buffer */
#define RXBUFFERSIZE TXBUFFERSIZE
/* Exported macro ------------------------------------------------------------*/
#define COUNTOF(__BUFFER__) (sizeof(__BUFFER__) / sizeof(*(__BUFFER__)))
/* Exported functions ------------------------------------------------------- */
#endif /* __MAIN_H */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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最佳答案
查看完整内容[请看2#楼]
问题已解决!st官网例程简单的进行如下修改就可一了。
只需要将原来右侧所有的uart1改为uart2,在将GPIO_PIN_9(10)改为GPIO_PIN_2(3)即可。昨天的问题应该是由于我将左侧的USARTx2_IRQn也改成USARTx2_IRQn了导致在如下函数回调中或着是串口中断出现问题导致错发生。
接下来要做的事情就是将串口1和2整合到一个程序中,让uart1和uart2一起工作,解决后在发帖和大家讨论。
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