56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
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/*!
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* @defgroup EdgeTriggered
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* @brief Edge triggered interrupts
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<table>
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<caption id="Edgepins">Edge triggered pin</caption>
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<tr><th>Pin <th>Description
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<tr><td>PB21 <td>S3 negative logic switch
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</table>
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* @{*/
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/**
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* @file EdgeTriggered.h
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* @brief Edge triggered interrupts
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* @details Edge triggered interrupts on PB21.
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* Interrupts on both rise and fall.
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* Since the switch is negative logic, there is a fall on touch,
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* and a rise on release.
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* @version ECE319K v1.0
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* @author Daniel Valvano and Jonathan Valvano
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* @copyright Copyright 2023 by Jonathan W. Valvano, valvano@mail.utexas.edu,
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* @warning AS-IS
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* @note For more information see http://users.ece.utexas.edu/~valvano/
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* @date August 13, 2023
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<table>
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<caption id="Edgepins2">Edge triggered pin</caption>
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<tr><th>Pin <th>Description
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<tr><td>PB21 <td>S3 negative logic switch
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</table>
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******************************************************************************/
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#ifndef __EDGETRIGGERED_H__
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#define __EDGETRIGGERED_H__
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/**
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* Arm interrupts on rise and fall of PB21
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* @param none
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* @return none
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* @see LaunchPad_Init()
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* @brief Initialize edge-triggered interrupt
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* @note interrupts will be enabled in main after all initialization
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* User defines their own ISR like the following
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* @code
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uint32_t Count;
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void GROUP1_IRQHandler(void){
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Count++; // number of touches
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GPIOB->DOUTTGL31_0 = RED; // toggle PB26
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GPIOB->CPU_INT.ICLR = 0x00200000; // clear bit 21
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}
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@endcode
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*/
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void EdgeTriggered_Init(void);
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#endif // __EDGETRIGGERED_H__
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/** @}*/
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