Trying to connect to portenta H7 without any success

[christosnc]

Hello 👋,

I am using an Arduino Portenta H7, and an analog light sensor. I tested the sensor with the on-board ADC of the arduino (analogRead) and I can read the values (so the sensor works).

This is the sensor I'm using: https://wiki.dfrobot.com/DFRobot_Ambient_Light_Sensor_SKU_DFR0026

This is the pinout for the Portenta: https://content.arduino.cc/assets/Pinout-PortentaH7_latest.png

The connections I'm using are as follows:

AVDD  -> Arduino 5V
GND   -> Arduino GND
PWDN  -> D20
DRDY  -> D21
MISO  -> D10
MOSI  -> D8
SCK   -> D9
CS    -> D7
START -> D4
DVDD  -> Arduino 5V

AGND  -> Arduino GND
AIN0  -> Analog output of the sensor
AIN1  -> Arduino GND

I also changed the pin constants in ads1262.h as follows:

const int ADS1262_DRDY_PIN = 21;
const int ADS1262_CS_PIN = 7;
const int ADS1262_START_PIN = 4;
const int ADS1262_PWDN_PIN = 20;

Finally, in ads1262.cpp I removed the deprecated SPI calls (setBitOrder, setDataMode, setClockDivider) and before every SPI.transfer() call, I added SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE1)); and after each transfer I added SPI.endTransaction();

The only thing I'm getting is "ads1262 Initialised successfully...." and that's it. I wasn't able to get a single reading, no matter what arrangement I tried.

Please help!

[christosnc]

Update:

I changed the DDRY and PWDN pins to D3 and D2 accordingly and now I started getting readings. There must be an issue with pins that can be used as analog, IDK.

BUT all the readings I get are always 0