ECE4333 - 2018 - Ahmed & Brandon / Mbed OS PlayBackFinal

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ExternalInterruptThread.cpp@8:a0890fa79084, 2018-02-19 (annotated)

Committer:
asobhy
Date:
Mon Feb 19 17:42:33 2018 +0000
Revision:
8:a0890fa79084
Parent:
7:73fd05fe556a
Child:
9:fe56b888985c
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asobhy 8:a0890fa79084 1 /******************************************************************************/
asobhy 8:a0890fa79084 2 // ECE4333
asobhy 8:a0890fa79084 3 // LAB Partner 1: Ahmed Sobhy - ID: 3594449
asobhy 8:a0890fa79084 4 // LAB Partner 2: Brandon Kingman - ID: 3470444
asobhy 8:a0890fa79084 5 // Project: Autonomous Robot Design
asobhy 8:a0890fa79084 6 // Instructor: Prof. Chris Diduch
asobhy 8:a0890fa79084 7 /******************************************************************************/
asobhy 8:a0890fa79084 8 // filename: ExternalInterruptThread.cpp
asobhy 8:a0890fa79084 9 // file content description:
asobhy 8:a0890fa79084 10 // * Function to create the External Interrupt Thread
asobhy 8:a0890fa79084 11 // * ExternalInterruptThread
asobhy 8:a0890fa79084 12 // * ExternalInterrupt ISR
asobhy 8:a0890fa79084 13 /******************************************************************************/
asobhy 0:a355e511bc5d 14 #include "mbed.h"
asobhy 0:a355e511bc5d 15
asobhy 0:a355e511bc5d 16 void ExtInterruptISR(void);
asobhy 0:a355e511bc5d 17 void ExtInterruptThread(void const *argument);
asobhy 0:a355e511bc5d 18
asobhy 0:a355e511bc5d 19 osThreadId ExtInterruptId;
asobhy 0:a355e511bc5d 20
asobhy 0:a355e511bc5d 21 osThreadDef(ExtInterruptThread, osPriorityHigh, 1024); // Declare ExtInterruptThread as a thread/process
asobhy 0:a355e511bc5d 22
asobhy 0:a355e511bc5d 23 InterruptIn Bumper(p8); // External interrupt pin declared as Bumper
asobhy 0:a355e511bc5d 24
asobhy 0:a355e511bc5d 25 DigitalOut led2(LED2);
asobhy 0:a355e511bc5d 26
asobhy 0:a355e511bc5d 27
asobhy 7:73fd05fe556a 28 /*******************************************************************************
asobhy 7:73fd05fe556a 29 * @brief This is the initialization function for ExternalInterruptthread
asobhy 7:73fd05fe556a 30 * @param none
asobhy 7:73fd05fe556a 31 * @return none
asobhy 7:73fd05fe556a 32 *******************************************************************************/
asobhy 0:a355e511bc5d 33 void ExternalInterruptThreadInit()
asobhy 0:a355e511bc5d 34 {
asobhy 0:a355e511bc5d 35 Bumper.rise(&ExtInterruptISR); // Attach the address of the interrupt handler to the rising edge of Bumper
asobhy 0:a355e511bc5d 36 ExtInterruptId = osThreadCreate(osThread(ExtInterruptThread), NULL);
asobhy 0:a355e511bc5d 37 }
asobhy 0:a355e511bc5d 38
asobhy 7:73fd05fe556a 39
asobhy 7:73fd05fe556a 40 /*******************************************************************************
asobhy 7:73fd05fe556a 41 * @brief ******** External Interrupt Thread ********
asobhy 7:73fd05fe556a 42 * @param none
asobhy 7:73fd05fe556a 43 * @return none
asobhy 7:73fd05fe556a 44 *******************************************************************************/
asobhy 0:a355e511bc5d 45 void ExtInterruptThread(void const *argument)
asobhy 0:a355e511bc5d 46 {
asobhy 0:a355e511bc5d 47 while (true) {
asobhy 0:a355e511bc5d 48 osSignalWait(0x01, osWaitForever); // Go to sleep until signal, SignalExtCollision, is received
asobhy 0:a355e511bc5d 49 led2 = !led2;
asobhy 0:a355e511bc5d 50 }
asobhy 0:a355e511bc5d 51 }
asobhy 0:a355e511bc5d 52
asobhy 0:a355e511bc5d 53
asobhy 7:73fd05fe556a 54 /*******************************************************************************
asobhy 7:73fd05fe556a 55 * @brief ******** External Interrupt ISR ********
asobhy 7:73fd05fe556a 56 * @param none
asobhy 7:73fd05fe556a 57 * @return none
asobhy 7:73fd05fe556a 58 *******************************************************************************/
asobhy 0:a355e511bc5d 59 void ExtInterruptISR(void)
asobhy 0:a355e511bc5d 60 {
asobhy 0:a355e511bc5d 61 osSignalSet(ExtInterruptId,0x01); // Send signal to the thread with ID, ExtInterruptId, i.e., ExtInterruptThread.
asobhy 0:a355e511bc5d 62 }