Add necessary delays to SPI DigitalPotControl example

SimonePDA · per1234 · commit 2729d38cd95d · 2019-03-26T01:25:28.000-07:00
According to arduino/Arduino#6395, these delays are required for the SPI communication with the digital potentiometer to work.
diff --git a/libraries/SPI/examples/DigitalPotControl/DigitalPotControl.ino b/libraries/SPI/examples/DigitalPotControl/DigitalPotControl.ino
@@ -63,9 +63,11 @@ void loop() {
 void digitalPotWrite(int address, int value) {
   // take the SS pin low to select the chip:
   digitalWrite(slaveSelectPin, LOW);
+  delay(100);
   //  send in the address and value via SPI:
   SPI.transfer(address);
   SPI.transfer(value);
+  delay(100);
   // take the SS pin high to de-select the chip:
   digitalWrite(slaveSelectPin, HIGH);
 }
