Stm32f103 and ADS1252

Projects Programming
1

Hi

ads1252
ads1252585×517 33.2 KB
.

ADS1252U
ADS1252U226×152 3.57 KB

I am using this code for ADS1252 and this is what i have on serial plotter when I disconnect jumper from PA6, when jumper is connected serial plotter is freezing.
No responds to shorting input pins 1 and 2 of ADS1252 .

#include <SPI.h>

// ADS1252 Connections
const int CLK_PIN = PA0;  // PWM output for ADS1252 Clock, ADS1252 pin # 4
const int DOUT_PIN = PA6; // SPI1 MISO                     ADS1252 pin # 5
const int SCLK_PIN = PA5; // SPI1 SCK                      ADS1252 pin # 6

void setup() {
  Serial.begin(115200);
  
  // Set up 1 MHz Clock on PA0 for ADS1252
  pinMode(CLK_PIN, OUTPUT);
  // Configure Timer to produce a 1MHz-2MHz clock here. 
  // Simplified: Using analogWrite to produce PWM (may need frequency adjustment)
  analogWrite(CLK_PIN, 128); 
  
  // Initialize SPI for reading
  SPI.begin();
  SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));
  
  pinMode(DOUT_PIN, INPUT);
}

void loop() {
  // Wait for /DRDY (DOUT/DRDY goes low)
  if (digitalRead(DOUT_PIN) == LOW) {
    long result = 0;
    
    // Read 24-bit (3 bytes)
    byte b1 = SPI.transfer(0x00);
    byte b2 = SPI.transfer(0x00);
    byte b3 = SPI.transfer(0x00);
    
    // Assemble 24 bits
    result = ((long)b1 << 16) | ((long)b2 << 8) | (long)b3;
    
    // Handle 24-bit signed conversion
    if (result & 0x800000) {
      result |= 0xFF000000;
    }
    Serial.print(" analog = ");  Serial.print( analogRead (PA2));
    Serial.print(" result = ");Serial.print(result);
    Serial.println();
  }
}