Setting interrupt priority

[pwd847]

Full project can be found here: https://forum.pjrc.com/threads/59860-Senior-design-project-UIUC.

Using this function I am trying to poll 3 filtered audio signals.



But when I run this code, nothing happens in the serial monitor. Also, sometimes I get a message that the Teensy on COM6 is not available.

#define PIN_BASS  A0
#define PIN_MID   A1
#define PIN_TWEET A2
#define BITS      10
IntervalTimer ADC_Read_Timer_Bass, ADC_Read_Timer_Mid, ADC_Read_Timer_Tweet;

void setup() {
  
  IOMUXC_SW_PAD_CTL_PAD_GPIO_AD_B1_02 &= ~ (1<<12) ; // disable keeper
  IOMUXC_SW_PAD_CTL_PAD_GPIO_AD_B1_03 &= ~ (1<<12) ; // disable keeper
  IOMUXC_SW_PAD_CTL_PAD_GPIO_AD_B1_04 &= ~ (1<<12) ; // disable keeper
  
  pinMode(PIN_BASS,  INPUT);
  pinMode(PIN_MID,   INPUT);
  pinMode(PIN_TWEET, INPUT);
  
  analogReadResolution(BITS);
  
  ADC_Read_Timer_Bass.begin( ADC_READ_BASS,  22);
  delayMicroseconds(7);
  ADC_Read_Timer_Mid.begin(  ADC_READ_MID,   22);
  delayMicroseconds(7);
  ADC_Read_Timer_Tweet.begin(ADC_READ_TWEET, 22);

  ADC_Read_Timer_Bass.priority(10); 
  ADC_Read_Timer_Mid.priority(9); 
  ADC_Read_Timer_Tweet.priority(8); 
  
  Serial.begin(115200);
}

volatile u_int16_t AnalogValue_Bass;
volatile u_int16_t AnalogValue_Mid;
volatile u_int16_t AnalogValue_Tweet;

void ADC_READ_BASS(){
  AnalogValue_Bass = analogRead(PIN_BASS);
}

void ADC_READ_MID(){
  AnalogValue_Mid = analogRead(PIN_MID);
}

void ADC_READ_TWEET(){
  AnalogValue_Tweet = analogRead(PIN_TWEET);
}

void loop() {
  u_int16_t AnalogValue_Bass_copy;
  u_int16_t AnalogValue_Mid_copy;
  u_int16_t AnalogValue_Tweet_copy;
  
  noInterrupts();
  AnalogValue_Bass_copy  = AnalogValue_Bass;
  interrupts();
  
  noInterrupts();
  AnalogValue_Mid_copy   = AnalogValue_Mid;
  interrupts();
  
  noInterrupts();
  AnalogValue_Tweet_copy = AnalogValue_Tweet;
  interrupts();
  
  Serial.print("Analog value Bass is  ");
  Serial.println(AnalogValue_Bass_copy);
  Serial.print("Analog value Mid is  ");
  Serial.println(AnalogValue_Mid_copy);
  Serial.print("Analog value Tweet is  ");
  Serial.println(AnalogValue_Tweet_copy);
}

This issue started when I added the interrupt priority code and called the two additional interval timers. Originally I was just using one interval timer, but since I needed to set priority on all 3 I figured I needed to call 3.

 

[pwd847]

So this code (with some edits) works when I back off the timing. I am currently trying to call setAveraging(1). The Arduino IDE doesn't seem to recognize it. Additionally, when I include ADC.h and ADC_Module.h setAveraging() STILL isn't recognized. Not sure what the problem is there.

 

[tonton81]

You can't run pinMode INPUT 'after' removing the keepers. That defeats the purpose. Move the keeper removals to after pinMode...