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Joule.md: Added Interrupt Pin assignment information #723

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Joule.md: Added Interrupt Pin assignment information #723

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Commits on May 8, 2017

  1. Added Interrupt Pin information 

    Verified that they worked with UBUNTU 16.04 LTS, Joule 570X, Tuchuck, BIOS eclipse#174, MRAA V1.5.1-24-g2ea6810

Setup: 
use
"#define CHECK_ALL_80_PINS_CONFIGURATION_STATUS  1" if you want to check which pins are interrupt "configurable"
If not defined, one "specified pin" can be tested with the interrupt handler
3 pin switch connected: to 1.8v J13.12 and GND J12.39, switch center pin connected to "Pin55" J13.15 in example below

pseudo code:
init mraa!!!
call initIsrPins()

void myISR {
   static uint32_t myCnt = 0;
   qDebug("Interrupt: POWER_FAIL!!! %d\n", myCnt++);
}

void initIsrPins(void)
{
   mraa_result_t myStatus;
   uint8_t myPinNum = 1;

#ifdef CHECK_ALL_80_PINS_CONFIGURATION_STATUS
   for(myPinNum = 1; myPinNum <=80; myPinNum++)
   {
       mraa_gpio_context myIsrPwrFail = mraa_gpio_init(myPinNum);
#else
       mraa_gpio_context myIsrPwrFail = mraa_gpio_init(55);   // Manually enter Pin to test
#endif

       if(myIsrPwrFail == 0)
           qDebug("FAILED mraa_gpio_context");
       else
       {
           myStatus = mraa_gpio_dir(myIsrPwrFail, MRAA_GPIO_IN);
           if(myStatus != MRAA_SUCCESS)
               qDebug("FAILED mraa_gpio_dir");
           else
           {
               myStatus = mraa_gpio_isr(myIsrPwrFail, MRAA_GPIO_EDGE_BOTH, (void (*)(void*)) ISR_POWER_FAIL, NULL);
               if(myStatus != MRAA_SUCCESS)
                   qDebug("FAILED mraa_gpio_isr");
               else
                   qDebug("Passed:%d", myPinNum);
           }
       }
#ifdef CHECK_ALL_80_PINS_CONFIGURATION_STATUS
   }
}


for(;;) { };
}
    @swfFrg
    swfFrg authored May 8, 2017
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