ADC DMA Not work properly (stm32f1)

[satar1980]

i want to take 1500 square wave data at pin A0 and 1500 sine wave data at pin A1, but the output is always swapped. so it will produce 2 graphs that merge each other. what should be graph 1 is a square wave and graph 2 is a sine wave. is there anyone who can fix it.

//==============================================================

include

uint8 pins[] = {PA0, PA1}; uint8 pin = PA0;

uint16_t dataPoints[3000];

char dataready = 0;

define sampleFreqKhz 1

define samplePeriodus 1600 / sampleFreqKhz

volatile static bool dma1_ch1_Active; //flag for interrupt

STM32ADC myADC1(ADC1);

void tx (unsigned char c) { //Serial.print(c); Serial.write( byte(c));

}

int ledState = LOW; volatile unsigned long blinkCount = 0;

void blinkLED(void) { if (ledState == LOW) { ledState = HIGH; blinkCount = blinkCount + 1; } else { ledState = LOW; } digitalWrite(PB1, ledState); }

void setup() { pinMode(PC13, OUTPUT); digitalWrite(PC13, HIGH); Serial.begin(115200); pinMode(PA0, INPUT_ANALOG); pinMode(PA1, INPUT_ANALOG); pinMode(PB1, OUTPUT);

Timer3.pause(); Timer3.setPrescaleFactor(1); Timer3.setOverflow(4); Timer3.setMasterModeTrGo(TIMER_CR2_MMS_UPDATE); Timer3.refresh(); // обнулить таймер Timer3.resume(); // запускаем таймер

Timer1.init(); Timer1.pause(); //Timer1.setMasterMode(TIMER_MASTER_MODE_UPDATE); Timer1.setPeriod(500); Timer1.setMode(TIMER_CH2, TIMER_OUTPUT_COMPARE); Timer1.setCompare(TIMER_CH2, 1); Timer1.attachInterrupt(TIMER_CH2, blinkLED); Timer1.refresh(); Timer1.resume();

myADC1.calibrate(); myADC1.setPins(pins, 2);

myADC1.setSampleRate(ADC_SMPR_1_5); myADC1.setScanMode();

}

void myDMA() { dma1_ch1_Active = 1;

myADC1.setDMA(dataPoints, 3000, (DMA_MINC_MODE | DMA_TRNS_CMPLT), DMA1_CH1_Event); myADC1.setTrigger(ADC_EXT_EV_TIM3_TRGO); myADC1.startConversion(); while (dma1_ch1_Active >= 1) {}; dma_disable(DMA1, DMA_CH1); }

static void DMA1_CH1_Event() { dma1_ch1_Active = 0; }

char read_char() { while (!Serial.available()) {

}; return Serial.read(); }

unsigned char buf[6]; void loop() {

unsigned char c;

//tx(255); //tx(255);

digitalWrite(PC13, LOW); char cc = read_char(); digitalWrite(PC13, HIGH);

if (cc == 0xE ) { buf[0] = cc; buf[1] = read_char(); buf[2] = read_char(); buf[3] = read_char();

} else if ( cc == 0xF) { buf[0] = cc;

} else { buf[0] = 0; }

if (buf[0] == 0xF) { // request do triger

dataready = 0;
myDMA();
dataready = 1;
tx(0);

} else if (buf[0] == 0xE) { c = 0;

if (dataready == 1) {
  // digitalWrite(PC13, LOW);
  if (buf[1] == 0x1) {
    delayMicroseconds(10);
    tx(0);
    tx(0);

    for (int i = 0; i < 1500; i++) {
      c = (unsigned char)map(dataPoints[i], 0, 1023, 1, 254)  ;
      if (c == 0) c = 1;
      tx(c);
    }
    tx(0);
  } else if (buf[1] == 0x2) {
    delayMicroseconds(10);
    tx(0);
    tx(0);
    for (int i = 1500; i < 3000; i++) {
      c =  (unsigned char)map(dataPoints[i], 0, 1023, 1, 254)  ;
      if (c == 0) c = 1;
      tx(c);

    }
    tx(0);
  } else {
    tx(0);
  }

  //digitalWrite(PC13, HIGH);

} else {
  tx(255);
}

} else { tx(255); }

}

[stevstrong]

Sorry, but I cannot understand what your code is doing. How do you detect that the output is swapped? Please simplify your sketch to a minimum in order to demonstrate the issue.

[stevstrong]

Closing this due to inactivity from OP.