板子上有个232，我正好有个USB转232，就搞个232通讯程序吧。我用的串口1
原理图：
主程序代码：
#include "main.h"
#include "stdio.h"
/** @addtogroup Examples
@{
*/
/** @addtogroup USART_Interrupt
@{
*/
/** @addtogroup USART_Interrupt_MACROS MACROS
@{
*/
#define DEBUG_USART USART2
/**@} end of group USART_Interrupt_MACROS */
/** @addtogroup USART_Interrupt_Variables Variables
@{
*/
uint8_t txBuf[] = "Hello USART2 \r\n";
uint8_t count = 0;
/**@} end of group USART_Interrupt_Variables */
/** @addtogroup USART_Interrupt_Functions Functions
@{
*/
/*!
* [url=home.php?mod=space&uid=247401]@brief[/url] Main program
*
* @param None
*
* @retval None
*
*/
int main(void)
{
USART_Config_T USART_ConfigStruct;
APM_MINI_LEDInit(LED2);
RCM_EnableAPB2PeriphClock((RCM_APB2_PERIPH_T)(RCM_APB2_PERIPH_GPIOA | RCM_APB2_PERIPH_USART1));
RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_USART2);
USART_ConfigStruct.baudRate = 115200;
USART_ConfigStruct.hardwareFlow = USART_HARDWARE_FLOW_NONE;
USART_ConfigStruct.mode = USART_MODE_TX_RX;
USART_ConfigStruct.parity = USART_PARITY_NONE;
USART_ConfigStruct.stopBits = USART_STOP_BIT_1;
USART_ConfigStruct.wordLength = USART_WORD_LEN_8B;
APM_MINI_COMInit(COM1, &USART_ConfigStruct);
//APM_MINI_COMInit(COM2, &USART_ConfigStruct);
USART_EnableInterrupt(USART1, USART_INT_RXBNE);
//USART_EnableInterrupt(USART2, USART_INT_RXBNE);
NVIC_EnableIRQRequest(USART1_IRQn, 2, 0);
//NVIC_EnableIRQRequest(USART2_IRQn, 1, 0);
while (1)
{
}
}
/*!
* @brief Delay
*
* @param None
*
* @retval None
*
*/
void Delay(void)
{
uint32_t tick = 0xfffff;
while (tick--);
}
/*!
* @brief USART1_Interrupt
*
* @param None
*
* @retval None
*
*/
void USART1_Isr(void)
{
// if(USART_ReadIntFlag(USART1, USART_INT_TXBE))
// {
// USART_TxData(USART1, txBuf[count]);
// count++;
// if (count == sizeof(txBuf))
// {
// count = 0;
// Delay();
// APM_MINI_LEDToggle(LED2);
// }
// }
uint8_t dat;
if(USART_ReadIntFlag(USART1, USART_INT_RXBNE))
{
dat = (uint8_t)USART_RxData(USART1);
USART_TxData(USART1, dat);
}
}
/*!
* @brief USART2_Interrupt
*
* @param None
*
* @retval None
*
*/
void USART2_Isr(void)
{
uint8_t dat;
if(USART_ReadIntFlag(USART2, USART_INT_RXBNE))
{
dat = (uint8_t)USART_RxData(USART2);
printf("%c", dat);
}
}
#if defined (__CC_ARM) || defined (__ICCARM__) || (defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050))
/*!
* @brief Redirect C Library function printf to serial port.
* After Redirection, you can use printf function.
*
* @param ch: The characters that need to be send.
*
* @param *f: pointer to a FILE that can recording all information
* needed to control a stream
*
* @retval The characters that need to be send.
*
* @note
*/
int fputc(int ch, FILE *f)
{
/* send a byte of data to the serial port */
USART_TxData(DEBUG_USART, (uint8_t)ch);
/* wait for the data to be send */
while (USART_ReadStatusFlag(DEBUG_USART, USART_FLAG_TXBE) == RESET);
return (ch);
}
#elif defined (__GNUC__)
/*!
* @brief Redirect C Library function printf to serial port.
* After Redirection, you can use printf function.
*
* @param ch: The characters that need to be send.
*
* @retval The characters that need to be send.
*
* @note
*/
int __io_putchar(int ch)
{
/* send a byte of data to the serial port */
USART_TxData(DEBUG_USART, ch);
/* wait for the data to be send */
while (USART_ReadStatusFlag(DEBUG_USART, USART_FLAG_TXBE) == RESET);
return ch;
}
/*!
* @brief Redirect C Library function printf to serial port.
* After Redirection, you can use printf function.
*
* @param file: Meaningless in this function.
*
* @param *ptr: Buffer pointer for data to be sent.
*
* @param len: Length of data to be sent.
*
* @retval The characters that need to be send.
*
* @note
*/
int _write(int file, char *ptr, int len)
{
int i;
for (i = 0; i < len; i++)
{
__io_putchar(*ptr++);
}
return len;
}
#else
#warning Not supported compiler type
#endif
/**@} end of group USART_Interrupt_Functions */
/**@} end of group USART_Interrupt */
/**@} end of group Examples */
#define MINI_COM1 USART1
#define MINI_COM1_CLK RCM_APB2_PERIPH_USART1
#define MINI_COM1_TX_PIN GPIO_PIN_9
#define MINI_COM1_TX_GPIO_PORT GPIOA
#define MINI_COM1_TX_GPIO_CLK RCM_APB2_PERIPH_GPIOA
#define MINI_COM1_RX_PIN GPIO_PIN_10
#define MINI_COM1_RX_GPIO_PORT GPIOA
#define MINI_COM1_RX_GPIO_CLK RCM_APB2_PERIPH_GPIOA
#define MINI_COM1_IRQn USART1_IRQn
/*!
* @brief Configures COM port.
*
* @param COM: Specifies the COM port to be configured.
* This parameter can be one of following parameters:
* [url=home.php?mod=space&uid=2817080]@ARG[/url] COM1
* @arg COM2
*
* @retval None
*/
void APM_MINI_COMInit(COM_TypeDef COM, USART_Config_T* configStruct)
{
GPIO_Config_T GPIO_configStruct;
/* Enable GPIO clock */
RCM_EnableAPB2PeriphClock(COM_TX_PORT_CLK[COM] | COM_RX_PORT_CLK[COM]);
if (COM == COM1)
{
RCM_EnableAPB2PeriphClock(COM_USART_CLK[COM]);
}
else
{
RCM_EnableAPB1PeriphClock(COM_USART_CLK[COM]);
}
/* Configure USART Tx as alternate function push-pull */
GPIO_configStruct.mode = GPIO_MODE_AF_PP;
GPIO_configStruct.pin = COM_TX_PIN[COM];
GPIO_configStruct.speed = GPIO_SPEED_50MHz;
GPIO_Config(COM_TX_PORT[COM], &GPIO_configStruct);
/* Configure USART Rx as input floating */
GPIO_configStruct.mode = GPIO_MODE_IN_FLOATING;
GPIO_configStruct.pin = COM_RX_PIN[COM];
GPIO_Config(COM_RX_PORT[COM], &GPIO_configStruct);
/* USART configuration */
USART_Config(COM_USART[COM], configStruct);
/* Enable USART */
USART_Enable(COM_USART[COM]);
}
/*!
* @brief This function handles USART1 Handler
*
* @param None
*
* @retval None
*
*/
void USART1_IRQHandler(void)
{
USART1_Isr();
}
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