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inc/EdgeTriggered.h

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