目录
- API (机翻)
- 上机实战
- 配置
- 初始化和实验
- 实验结果
- 整体代码
- myUart.c
- myUart.h
- myTask.c
- myTask.h
- main.c
- main.h
平台：Code Composer Studio 10.4.0
MSP432P401R SimpleLink™ 微控制器 LaunchPad™ 开发套件
(MSP-EXP432P401R)
API (机翻)
官方UART API 手册
void UART_close (UART_Handle handle)
关闭由UART句柄指定的UART外围设备int_fast16_t UART_control (UART_Handle handle, uint_fast16_t cmd, void *arg)
在给定的UART_Handle上执行实现特定的特性void UART_init (void)
初始化UART模块UART_Handle UART_open (uint_least8_t index, UART_Params *params)
初始化给定的UART外围设备void UART_Params_init (UART_Params *params)
初始化UART_Params结构体为其默认值int_fast32_t UART_write (UART_Handle handle, const void *buffer, size_t size)
用于在启用中断的情况下将数据写入UARTint_fast32_t UART_writePolling (UART_Handle handle, const void *buffer, size_t size)
向UART写入数据的函数，它轮询外围设备以等待可以写入新数据。此API的使用与UART_write()
的使用是互斥的void UART_writeCancel (UART_Handle handle)
取消调用UART_write()int_fast32_t UART_read (UART_Handle handle, void *buffer, size_t size)
用于从启用中断的UART读取数据int_fast32_t UART_readPolling (UART_Handle handle, void *buffer, size_t size)
从UART读取数据而不中断。此API必须与UART_read()互斥使用void UART_readCancel (UART_Handle handle)
取消调用UART_read()
上机实战
配置
LED1用于提示单片机正常运行
初始化和实验
/** ======== mainThread ========*/
void *mainThread(void *arg0)
{My_Task_Init(LED_Task, 1, 1024);My_Uart_Init(&huart1, USB_UART, 115200);while(1){UART_printf(huart1, "MSP432P401R in 115200\r\n");usleep(1000);}
}
实验结果
点击发送
如图收发实验成功
整体代码
myUart.c
/** myUart.c** Created on: 2021年8月3日* Author: Royic*/#include "./inc/myUart.h"#include <ti/drivers/GPIO.h>UART_Handle huart1;char Uart_Rx_Buffer[Uart_Rx_Buffer_Size] = {0};void Uart_TxCallback_Func(UART_Handle handle, void *buf, size_t count)
{}void Uart_RxCallback_Func(UART_Handle handle, void *buf, size_t count)
{UART_read(handle, Uart_Rx_Buffer, Uart_Rx_Buffer_Size);
}void My_Uart_Init(UART_Handle *huart, uint_least8_t index, uint32_t BaudRate)
{UART_Params uartParams;// Initialize the UART driver. UART_init() must be called before// calling any other UART APIs.UART_init();// Create a UART with data processing off.UART_Params_init(&uartParams);uartParams.readMode = UART_MODE_CALLBACK;
// uartParams.writeMode = UART_MODE_CALLBACK;uartParams.writeMode = UART_MODE_BLOCKING;uartParams.readCallback = Uart_RxCallback_Func;uartParams.writeCallback = Uart_TxCallback_Func;uartParams.writeDataMode = UART_DATA_TEXT;uartParams.readDataMode = UART_DATA_TEXT;uartParams.readReturnMode = UART_RETURN_NEWLINE;uartParams.readEcho = UART_ECHO_OFF;uartParams.baudRate = BaudRate;// Open an instance of the UART drivers*huart = UART_open(index, &uartParams);if (*huart == NULL){// UART_open() failedwhile (1);}UART_read(*huart, Uart_Rx_Buffer, Uart_Rx_Buffer_Size);
}#include <string.h>
#include <stdarg.h>
#include <stdio.h>
void UART_printf(UART_Handle handle, const char *format,...)
{uint32_t length;va_list args;char TxBuffer[Uart_Tx_Buffer_Size] = {0};va_start(args, format);length = vsnprintf((char*)TxBuffer, sizeof(TxBuffer)+1, (char*)format, args);va_end(args);UART_write(handle, TxBuffer, length);
}
myUart.h
/** myUart.h** Created on: 2021年8月3日* Author: Royic*/#ifndef INC_MYUART_H_
#define INC_MYUART_H_#include "./inc/main.h"// Import the UART driver definitions
#include <ti/drivers/UART.h>#define Uart_Rx_Buffer_Size 32
#define Uart_Tx_Buffer_Size 32extern char Uart_Rx_Buffer[Uart_Rx_Buffer_Size];void My_Uart_Init(UART_Handle *huart, uint_least8_t index, uint32_t BaudRate);
void UART_printf(UART_Handle handle, const char *format,...);//Example
//My_Uart_Init(&huart1, USB_UART, 115200);
//UART_write(huart1, "OK\r\n", 5);extern UART_Handle huart1;#endif /* INC_MYUART_H_ */myTask.c
/** myTask.c** Created on: 2021年8月2日* Author: Royic*//* POSIX Header files */
#include <pthread.h>/* RTOS header files */
#include <ti/sysbios/BIOS.h>#include "./inc/myTask.h"/* Driver Header files */
#include <ti/drivers/GPIO.h>void My_Task_Init(void *(*startroutine)(void *), int priority, size_t stacksize)
{pthread_t thread;pthread_attr_t attrs;struct sched_param priParam;int retc;/* Initialize the attributes structure with default values */pthread_attr_init(&attrs);/* Set priority, detach state, and stack size attributes */priParam.sched_priority = priority;retc = pthread_attr_setschedparam(&attrs, &priParam);retc |= pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);retc |= pthread_attr_setstacksize(&attrs, stacksize);if (retc != 0){/* failed to set attributes */while (1){}}retc = pthread_create(&thread, &attrs, startroutine, NULL);if (retc != 0){/* pthread_create() failed */while (1){}}
}void *LED_Task(void *arg0)
{while(1){GPIO_toggle(LED1);sleep(1);}
}myTask.h
/** myTask.h** Created on: 2021年8月2日* Author: Royic*/#ifndef INC_MYTASK_H_
#define INC_MYTASK_H_#include "./inc/main.h"void *mainThread(void *arg0);
void My_Task_Init(void *(*startroutine)(void *), int priority, size_t stacksize);void *LED_Task(void *arg0);#endif /* INC_MYTASK_H_ */main.c
/** ======== main_tirtos.c ========*/#include "./inc/main.h"/* POSIX Header files */
#include <pthread.h>/* RTOS header files */
#include <ti/sysbios/BIOS.h>/* Driver configuration */
#include <ti/drivers/Board.h>
#include <ti/drivers/GPIO.h>#include "./inc/myTask.h"
#include "./inc/myUart.h"/** ======== main ========*/
int main(void)
{/* Call driver init functions */Board_init();GPIO_init();My_Task_Init(mainThread, 1, 1024);BIOS_start();return (0);
}/** ======== mainThread ========*/
void *mainThread(void *arg0)
{My_Task_Init(LED_Task, 1, 1024);My_Uart_Init(&huart1, USB_UART, 115200);while(1){UART_printf(huart1, "MSP432P401R in 115200\r\n");usleep(1000);}
}main.h
/** main.h** Created on: 2021年8月2日* Author: Royic*/#ifndef INC_MAIN_H_
#define INC_MAIN_H_/* For usleep() */
#include <unistd.h>
#include <stdint.h>
#include <stddef.h>/* Driver configuration */
#include "ti_drivers_config.h"#endif /* INC_MAIN_H_ */
