【AT-START-F407测评】+ 串口收发
今天搞了一下串口串口2
代码：
#include "at32f4xx.h"
#include "at32_board.h"
/** @addtogroup AT32F407_StdPeriph_Examples
* @{
*/
/** @addtogroup USART_Interrupt
* @{
*/
/* Private typedef -----------------------------------------------------------*/
typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
/* Private define ------------------------------------------------------------*/
#define TxBufferSize1 (countof(TxBuffer1) - 1)
#define TxBufferSize2 (countof(TxBuffer2) - 1)
#define RxBufferSize1 TxBufferSize2
#define RxBufferSize2 TxBufferSize1
/* Private macro -------------------------------------------------------------*/
#define countof(a) (sizeof(a) / sizeof(*(a)))
/* Private variables ---------------------------------------------------------*/
USART_InitType USART_InitStructure;
uint8_t TxBuffer1[] = "USART Interrupt Example: USART2 -> USART3 using Interrupt";
uint8_t TxBuffer2[] = "USART Interrupt Example: USART3 -> USART2 using Interrupt";
uint8_t RxBuffer1;
uint8_t RxBuffer2;
__IO uint8_t TxCounter1 = 0x00;
__IO uint8_t TxCounter2 = 0x00;
__IO uint8_t RxCounter1 = 0x00;
__IO uint8_t RxCounter2 = 0x00;
uint8_t NbrOfDataToTransfer1 = TxBufferSize1;
uint8_t NbrOfDataToTransfer2 = TxBufferSize2;
uint8_t NbrOfDataToRead1 = RxBufferSize1;
uint8_t NbrOfDataToRead2 = RxBufferSize2;
__IO TestStatus TransferStatus1 = FAILED;
__IO TestStatus TransferStatus2 = FAILED;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @paramNone
* @retval None
*/
int main(void)
{
/* System Clocks Configuration */
RCC_Configuration();
/* NVIC configuration */
NVIC_Configuration();
/* Configure the GPIO ports */
GPIO_Configuration();
/* Initialize Leds mounted on board */
AT32_Board_Init();
/* USART2 and USART3 configuration ------------------------------------------------------*/
/* USART2 and USART3 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_StructInit(&USART_InitStructure);
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;
/* Configure USART2 */
USART_Init(USART2, &USART_InitStructure);
/* Enable USART2 Receive and Transmit interrupts */
USART_INTConfig(USART2, USART_INT_RDNE, ENABLE);
//USART_INTConfig(USART2, USART_INT_TDE, ENABLE);
/* Enable the USART2 */
USART_Cmd(USART2, ENABLE);
while(1)
{
}
}
/**
* @briefConfigures the different system clocks.
* @paramNone
* @retval None
*/
void RCC_Configuration(void)
{
/* Enable GPIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOA | RCC_APB2PERIPH_GPIOD | RCC_APB2PERIPH_GPIOC | RCC_APB2PERIPH_AFIO, ENABLE);
/* Enable USART2 Clock */
RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_USART2, ENABLE);
/* Enable USART3 Clock */
//RCC_APB1PeriphClockCmd(RCC_APB1PERIPH_USART3, ENABLE);
}
/**
* @briefConfigures the different GPIO ports.
* @paramNone
* @retval None
*/
void GPIO_Configuration(void)
{
GPIO_InitType GPIO_InitStructure;
/* Enable the USART3 Pins Software Remapping */
//GPIO_PinsRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
/* Enable the USART2 Pins Software Remapping */
//GPIO_PinsRemapConfig(GPIO_Remap_USART2, ENABLE);
/* Configure USART2 Rx as input floating */
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure USART3 Rx as input floating */
//GPIO_InitStructure.GPIO_Pins = GPIO_Pins_11;
//GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Configure USART2 Tx as alternate function push-pull */
GPIO_InitStructure.GPIO_Pins = GPIO_Pins_2;
GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
///* Configure USART3 Tx as alternate function push-pull */
//GPIO_InitStructure.GPIO_Pins = GPIO_Pins_10;
//GPIO_Init(GPIOC, &GPIO_InitStructure);
}
/**
* @briefConfigures the nested vectored interrupt controller.
* @paramNone
* @retval None
*/
void NVIC_Configuration(void)
{
NVIC_InitType NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
/* Enable the USART2 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the USART3 Interrupt */
//NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//NVIC_Init(&NVIC_InitStructure);
}
/**
* @briefCompares two buffers.
* @parampBuffer1, pBuffer2: buffers to be compared.
* @paramBufferLength: buffer's length
* @retval PASSED: pBuffer1 identical to pBuffer2
* FAILED: pBuffer1 differs from pBuffer2
*/
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
while(BufferLength--)
{
if(*pBuffer1 != *pBuffer2)
{
return FAILED;
}
pBuffer1++;
pBuffer2++;
}
return PASSED;
}
#ifdefUSE_FULL_ASSERT
/**
* @briefReports the name of the source file and the source line number
* where the assert_param error has occurred.
* @paramfile: pointer to the source file name
* @paramline: 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
/**
* @}
*/
/**
* @}
*/
void USART2_IRQHandler(void)
{
if(USART_GetITStatus(USART2, USART_INT_RDNE) != RESET)
{
/* Read one byte from the receive data register */
RxBuffer1 = USART_ReceiveData(USART2);
/* Write one byte to the transmit data register */
USART_SendData(USART2, RxBuffer1);
}
//
//if(USART_GetITStatus(USART2, USART_INT_TDE) != RESET)
//{
// /* Write one byte to the transmit data register */
// USART_SendData(USART2, TxBuffer1);
// if(TxCounter1 == NbrOfDataToTransfer1)
// {
// /* Disable the USART2 Transmit interrupt */
// USART_INTConfig(USART2, USART_INT_TDE, DISABLE);
// }
//}
}效果图：
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