Hi folks, I am using Wiced feather STM32F205 for my project and I want to be able to acquire and reconstruct input signals upto 3Mhz (i.e sampling rate = 6MSPS). I was able to implement kelu's code on dual ADC and attain a sampling rate of 1.8 MSPS. I was going through the code written by hathatch based on ADC class and I made the following modifications in his code with an aim to get a sampling rate of 6MSPS. I am very new to ADC coding so it would be really great to have your suggestions and feedback.

define BUFSIZE 390

int analogPin = PC5; int p2=PA1; int p3=PA2; int ledPin = PA15; uint16_t buffer[BUFSIZE] = { 0 }; boolean flag;

void adc_interrupt(void) { digitalWrite(ledPin, HIGH); digitalWrite(ledPin, LOW); flag=true;

// Continue sampling ADC.resume(); }

void setup() { pinMode(ledPin, OUTPUT);

// Init ADC with analog pin ADC.begin(analogPin,p2,p3);

//triple mode ADC1->regs->CR1 |= 0X07 << 0;

//set the resolution adc_set_resolution (uint32_t adc, uint32_t 8 )

// Set up FIFO holding ADC data ADC.setBuffer(buffer, BUFSIZE);

// Set up interrupt callback // Fired when the FIFO is full of samples ADC.attachInterrupt(adc_interrupt);

// Set sample rate, possible value is in enum adc_smp_rate (adc.h) // When speed up the sample rate, you may need to increase // the buffer. Otherwise buffer overrun error will occur ADC.setSampleRate(ADC_SMPR_1_5);

// Start ADC sampling ADC.start(); }

void loop() { if (flag) { for (m=0;m<390;m++) { val[m]=adc_read(); } for (m=0;m<390;m++) { Serial.println(val[m]); } flag=false; }

}

adafruit / Adafruit_WICED_Arduino

How to get 6MSPS from Wiced feather board STM32F205 #72

define BUFSIZE 390