45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
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/************************************************************************//**
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* \file ext_uart.h
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* \brief Function to use the extension uart
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* \author pascal (dot) sartoretti (at) hevs (dot) ch
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***************************************************************************/
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#ifndef __EXT_UART_H
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#define __EXT_UART_H
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#include <stdint.h>
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#include "stm32f7xx_hal.h"
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extern UART_HandleTypeDef ext_uart; // extension uart handle
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/************************************************************************//**
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* \brief Inits the extension uart
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* \param speed This si the uart speed selected for example 115200.
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* The extension uart could be use with or without interrupts.
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*
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* Without interrupts:
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* -------------------
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* To send something on the uart, you have to use HAL_UART_Transmit function
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* as the example below.
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* error = HAL_UART_Transmit(&ext_uart, msg, sizeof(msg),50);
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* To receive you have to use HAL_UART_Receive as example below.
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* error = HAL_UART_Receive(&ext_uart, msg, sizeof(msg),HAL_MAX_DELAY);
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* The HAL_MAX_DELAY waits until receive is finished.
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*
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* With interrupts:
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* ----------------
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* The functions below have to be used:
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* HAL_UART_Transmit_IT(&ext_uart," Welcome\n\r", 10);
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* HAL_UART_Receive_IT(&ext_uart,data,8);
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*
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* The callback functions above could be implemented for usage on interrupt
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* mode when the full size is transmitted (or received).
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* void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
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* void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
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*
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***************************************************************************/
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extern void Ext_UART_Init(uint32_t speed);
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#endif /* __BOARD_LED_H */
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