54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
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/************************************************************************//**
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* \file ext_keyboard.h
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* \brief Function to use the extension keyboard
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* \author pascal (dot) sartoretti (at) hevs (dot) ch
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***************************************************************************/
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#ifndef __EXT_KEYBOARD_H
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#define __EXT_KEYBOARD_H
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#include <stdint.h>
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#include "stm32f7xx_hal.h"
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extern uint8_t ext_kbChar;
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/************************************************************************//**
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* \brief Inits the extension keyboard
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* The extension keyboard use interrupt from keyboard (PF8)
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*
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* Read keyboard non blocking (interrupt):
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* ---------------------------------------
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* To read the keyboard, the callback function HAL_GPIO_EXTI_Callback has
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* to be implemented.
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* the example below send the keyboard char to the serial port
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* void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
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* {
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* if(GPIO_Pin == GPIO_PIN_8)
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* {
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* HAL_UART_Transmit(&ext_uart, &ext_kbChar, 1,100);;
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* }
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* }
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* Read keyboard blocking (pooling until key pressed):
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* ---------------------------------------------------
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* The functions below have to be used:
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* pressed = Ext_Keyboard_Read();
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*
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* \warning The external interrupts (5,6,7,9) have to be implemented
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* in the ext_keyboard.c file because they share the same processor irq
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* EXTI9_5_IRQHandler.
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***************************************************************************/
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void Ext_Keyboard_Init(void);
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/************************************************************************//**
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* \brief Read the pressed key on extension keyboard
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* \return The ASCII code of key pressed.
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*
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* \warning This function is blocking until a char is received
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***************************************************************************/
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uint8_t Ext_Keyboard_Read(void);
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#endif /* __BOARD_LED_H */
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