Experiment 20190113a

New tests with m5stack

BEWARE white screens may occur if connections are wrong.

Photos and connections

Overall setup

Detail of m5stack box

Detail of RPi header

Back of m5stack

Code

#include <SPI.h>
#include <M5Stack.h>

/* CONNECTIONS BETWEEN RPi and m5stack
  M5STACK pin22 -> RPi header GPIO 23 (Ice40 reset)
  M5STACK pin21 -> RPi header GPIO 8 (Ice40 CS)
  M5STACK pin19 -> RPi header GPIO 10 (Rpi MISO)
  M5STACK pin23 -> RPi header GPIO 9 (Rpi MOSI)
  M5STACK pin18 -> RPi header GPIO 11 (Rpi  CLK)
  M5STACK GND to RaspberryPi header GND pin
  M5STACK 5V ->  RaspberryPi header 5V pin
*/

#define ICE40RESET 22
#define ICE40CS    21
#define ICE40MISO  19
#define ICE40MOSI  23
#define ICE40CLK   18
#define PTS        3200
#define LenAcq      2*PTS+1
#define LenData      PTS+1

// Sound aspects
#define D0 -1 //silence
//THE FIRST OCTAVE
#define B1 262 //Do (B)
#define D1 294 //Re (D)
#define E1 330 //Mi (E)

uint16_t MaxPt = PTS / 2;
int CenterPeak = 80;
uint16_t DATA[LenAcq];
uint16_t RAWDATA[LenData];

uint16_t CLEANDATA[320];
int Factor = 80;
int SPIMODE = 1;
int i = 0;
int j = 0;
int value = 0;

int GainLevel = 400;
bool MSBF = true;

void SetGain(  ) {
  for (int i = 0; i <= 40; i++) {
    WriteFPGA(16 + i, 400 / 4);
  }
}

void buttons_test() {
  int MAXARRAY = 0;

  if (M5.BtnA.wasPressed()) {

    M5.Lcd.fillScreen(BLACK);
    M5.Lcd.setCursor(10, 10);
    M5.Lcd.setTextColor(TFT_RED);
    M5.Lcd.setTextSize(3);
    M5.Lcd.printf("Testing if connection is OK \n\n");

    M5.Lcd.printf("LED 2 should be blinking 3 times \n\n");
    TestFPGA();
    TestFPGA();
    TestFPGA();


    M5.Speaker.tone(B1, 200); //frequency 3000, with a duration of 200ms

  }

  if (M5.BtnB.wasPressed()) {
    M5.Lcd.fillScreen(BLACK);
    M5.Lcd.setCursor(10, 10);
    M5.Lcd.setTextColor(TFT_RED);
    M5.Lcd.setTextSize(3);
    M5.Lcd.printf("Details of a peak\n\n");

    CenterPeak = MaxPt * Factor;
    for (int i = 0; i <= 319 / 2; i++) {

      M5.Lcd.drawPixel(2 * i, RAWDATA[CenterPeak - 320 / 4 + i] / 4 + 20, TFT_RED);

      M5.Lcd.drawLine(2 * i, RAWDATA[CenterPeak - 320 / 4 + i] / 4 + 20, 2 * i + 2, RAWDATA[CenterPeak - 320 / 4 + i + 1] / 4 + 20, TFT_ORANGE);

      /*if (i < 5) {
        M5.Lcd.printf("%3d ; ", i);
        M5.Lcd.printf("%3d \n", RAWDATA[CenterPeak - 320 / 2 + i] / 4);
        }
      */
    }

    M5.Speaker.tone(D1, 200); //frequency 3000, with a duration of 200ms

  }

  if (M5.BtnC.wasPressed()) {
    M5.Lcd.fillScreen(BLACK);
    M5.Lcd.setCursor(10, 10);
    M5.Lcd.setTextColor(TFT_GREEN);
    M5.Lcd.setTextSize(3);
    M5.Lcd.printf("Acquisition\n\n");
    // Read
    WriteFPGA(0xEF, 0x01); // cleaning pointer
    WriteFPGA(0xEA, 0x01); // trigging acquisition
    delay(200);
    GetData();




    /*
        for (int i = 0; i <= 20; i++) {
      M5.Lcd.printf("%3d -- ", DATA[2 * i]);
      M5.Lcd.printf("%3d -->  ", DATA[2 * i + 1]);
      M5.Lcd.printf("%3d\n", RAWDATA[i]);
      }
    */
    Factor = PTS / 320; // PTS = 3200 pts (16msps * 200us)
    for (int i = 0; i <= 319; i++) {
      value = 0;
      for (int j = 0; j <= Factor ; j++) {
        value = value + abs(RAWDATA[i * Factor + j] - 512);
      }
      if (value >  MAXARRAY ) {
        if  (i < 310) {
          MAXARRAY = value;
          MaxPt = i;
        }
      }
      value = value / (Factor * 2); // 240 (512, going into 240)
      M5.Lcd.drawFastVLine(i, (240 - value) - 10, 240 - 10, TFT_GREEN);
    }
    M5.Lcd.drawRect(230, 0, 240, 320, BLACK);
    //M5.Lcd.printf("== Value Max at %3d \n", MaxPt);

    //M5.Lcd.drawFastVLine(0, 0, 100, TFT_RED);
    //M5.Lcd.drawFastVLine(319, 0, 200, TFT_GREEN);

    M5.Speaker.tone(E1, 200); //frequency 3000, with a duration of 200ms

  }
}


void SetupFPGA() {
  GainLevel = 200;
  SetGain(); // TGC level

  // Duration of Pon
  WriteFPGA(0xE0, 0x19 ); // 200ns Pon
  // Duration between Pon and Poff
  WriteFPGA(0xD0, 0xC ); // 12*7.8125ns delay between Pon and Poff
  // Duration of damper
  WriteFPGA(0xE1, 0 ); //
  WriteFPGA(0xE2, 254 ); //
  // Duration betwen beginning and end of acquisition
  WriteFPGA(0xE3, 2 ); //
  WriteFPGA(0xE4, 128 ); //
  // Length of acquisition
  WriteFPGA(0xE5, 0x60 ); //
  WriteFPGA(0xE6, 0x00 ); // 0x60 * 255 *   7.8125ns duree
  //Freq
  WriteFPGA(0xED, 3); // setting freq as 64Msps / (1+arg) eg 3 = 16msps
  //Shoot
  WriteFPGA(0xEB, 0x00); // Doing 1 shot
}


void GetData() {


  for (int i = 0; i <= LenAcq; i++) {
    DATA[i] = 0;
  }

  for (int i = 0; i <= LenData; i++) {
    RAWDATA[i] = 0;
  }

  for (int i = 0; i <= LenAcq; i++) {
    SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));
    digitalWrite(ICE40CS, LOW);
    DATA[i] = SPI.transfer(0x00);
    digitalWrite(ICE40CS, HIGH);
    SPI.endTransaction();
  }

  for (int i = 0; i <= LenData ; i++) {

    RAWDATA[i] = 128 * (DATA[2 * i + 1] & 0b111) + DATA[2 * i + 2];

    /*
      if (i < 10) {
      M5.Lcd.printf("%3d ", DATA[2 * i + 1]); M5.Lcd.printf("%3d - ", DATA[2 * i + 1] & 0b111);
      M5.Lcd.printf("%3d ", DATA[2 * i ]); M5.Lcd.printf("%3d - ", DATA[2 * i + 2]);
      M5.Lcd.printf("%3d \n", RAWDATA[i]);
      }
    */
  }



}


void setup() {
  // put your setup code here, to run once:
  pinMode(ICE40CS, OUTPUT);
  pinMode(ICE40RESET, OUTPUT);




  // initialize SPI:
  //SPI.begin();



  SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));
  SPI.endTransaction();

  Serial.begin(115200);         // SERIAL
  M5.begin();                   // M5STACK INITIALIZE
  M5.Lcd.setBrightness(200);    // BRIGHTNESS = MAX 255
  M5.Lcd.fillScreen(BLACK);     // CLEAR SCREEN
  M5.Lcd.setRotation(0);        // SCREEN ROTATION = 0

  M5.Lcd.setTextColor(TFT_RED);
  M5.Lcd.setTextSize(3);


  M5.Lcd.printf("Initialisation\n\n");
  delay(500);
  digitalWrite(ICE40RESET, LOW);
  delay(500);
  digitalWrite(ICE40RESET, HIGH);
  M5.Lcd.setTextColor(TFT_YELLOW);
  M5.Lcd.printf("RESET DONE\n\n");
  delay(500);
  M5.Lcd.setTextColor(TFT_GREEN);
  SetupFPGA();
  M5.Lcd.printf("FPGA has been set up for acquisitions\n\n");

}

int WriteFPGA(int address, int value) {

  //SPI.begin();
  SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));

  digitalWrite(ICE40CS, LOW);
  SPI.transfer(0xAA);
  digitalWrite(ICE40CS, HIGH);
  delayMicroseconds(5);
  digitalWrite(ICE40CS, LOW);
  SPI.transfer(address);
  digitalWrite(ICE40CS, HIGH);
  delayMicroseconds(5);
  digitalWrite(ICE40CS, LOW);
  SPI.transfer(value);
  digitalWrite(ICE40CS, HIGH);
  delayMicroseconds(5);
  //SPI.end();
  SPI.endTransaction();
  return 1;
}

int TestFPGA() {
  M5.Lcd.printf("Blink 1 -  ");
  WriteFPGA(0xEB, 0x01);
  delay(750);
  WriteFPGA(0xEB, 0x00);
  delay(750);

}


void loop() {
  // put your main code here, to run repeatedly:
  //TestFPGA();

  buttons_test();
  M5.update();
}

Automated list of supporting files for the experiment 20190113a

List of files

md

Modules

Images of the Experiment

Others

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