MKR WiFi 1010 - read register

Official Hardware MKR Family MKR WiFi 1010
1

Trying to get a read out of the register and keep getting an error relating to:

for (int i = 0; i < 8; i++) {
// Mask each bit in the byte and store it
bits = (byte >> i) & mask;
Serial.print(i);
Serial.print(" = ");
Serial.println(bits);
}

it does not like the unsigned char to int conversion.

error: incompatible types in assignment of 'int' to 'unsigned char [8]'

bits = (byte >> i) & mask;

Whats the reason??

3

This is the latest code I have used for debug

#include <Wire.h>
#define PMIC_ADDRESS 0x6B


byte val;
byte BQ_REG[10] = { 0x01, 0x2, 0x03, 0x04, 0x05, 0x06,0x07,0x08, 0x09 };
byte OTG = 0x2B;
int PA18;

void setup() {
  Serial.begin(115200);
   while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB
  }
  
  Wire.begin();

  // Check battery status
  analogReadResolution(12);
  int sensorValue = analogRead(ADC_BATTERY);
  float voltage = sensorValue * (4.208 / 4095.000);
        if (voltage < 3.000) { // BATLOWV REG04[1] = 1 {
        Serial.println("Battery voltage below 3.0V - Battery BOOST mode not allowed!");
        return;
      }
      else {
      Serial.print("Voltage: ");
      Serial.println(voltage);
      }
      
  // Check watchdog timer status
  Wire.beginTransmission(PMIC_ADDRESS);
  Wire.write(BQ_REG[4]); // REG05
  Wire.endTransmission();
  
  Wire.beginTransmission(PMIC_ADDRESS);
  Wire.requestFrom(PMIC_ADDRESS, 1);
  Wire.endTransmission();

  val = Wire.read();

  Serial.print("Watchdog timer value is: ");
  Serial.println(val);
        
     if (val != 154) {  // 154 DEC = 9A
        Serial.println("Watchdog timer is enabled, we're going to disable it now");
        Wire.beginTransmission(PMIC_ADDRESS);
        Wire.write(BQ_REG[4]); // REG05
        Wire.write(0x9A);  // Enable Termination, match ITERM, Set Watchdog timer to 00, Safety timer on, Fast Charge 8hrs
        Wire.endTransmission();
     }

  // Check OTG pin High and OTG register REG01[4:5] to 10
  PA18 = digitalRead(PIN_USB_HOST_ENABLE);
  Serial.print("PA18 is: ");
  Serial.println(PA18);

  Wire.beginTransmission(PMIC_ADDRESS);
  Wire.write(BQ_REG[0]);  // REG 01
  Wire.write(OTG); // don't reset, normal watchdog, 10=OTG mode, 1011 = 3.5V min sys voltage
  Wire.endTransmission();

}

void loop() {  // We dump now all the registries of the BQ chip

  for (int r = 0; r < 9; r++) {
  Wire.beginTransmission(PMIC_ADDRESS);
  Wire.write(BQ_REG[r]);
  Wire.endTransmission();
  
  Wire.beginTransmission(PMIC_ADDRESS);
  Wire.requestFrom(PMIC_ADDRESS, 1);
  Wire.endTransmission();
  
  val = Wire.read();
 
  Serial.print("Register ");
  Serial.print(BQ_REG[r]);
  Serial.print(" = 0x");
    if (val<15)
   {
    Serial.print("0");
   }
  Serial.print(val, HEX);
  Serial.print("  Bits (0-7) :  ");

  unsigned char byte = val;
  unsigned char mask = 1;
  unsigned char bits[8];

  // Extract the bits
  for (int i = 0; i < 8; i++) {
    // Mask each bit in the byte and store it
    bits[i] = (byte >> i) & mask;

    Serial.print(bits[i]);
    Serial.print(" ");
    }
    Serial.println(" ");
  }
   Serial.println(" ");

  delay(10000);

}
4

Behold81:
...
Whats the reason??

// Mask each bit in the byte and store it
bits = (byte >> i) & mask;

There is a mistake in your code, should be >>

bits[i] = (byte >> i) & mask;
5

ballscrewbob:
TOPIC SPLIT
DO NOT HIJACK !

Could you take a few moments to Learn How To Use The Forum.
It will help you get the best out of the forum.

Bob.

Was that aimed at me? how was this a topic split? I was identifying a bug in the code provided to assist with reading the register.

6

Smile6905:
There is a mistake in your code, should be >>

bits[i] = (byte >> i) & mask;

Thankyou. the newer code works. now to work out if i can find my issue.