analogRead problem with IDE 1.5.5 libraries

cmaglie · December 16, 2013, 9:53pm

Hi guys,

The bug was introduced after the optimization of the ADC reads (shame on me :()

May I ask you to try with the following patch and check if that fixes the problem?

github.com/arduino/Arduino

Due analog read

opened 02:34AM - 16 Dec 13 UTC

closed 09:58AM - 02 Jul 14 UTC

donelsonas

Component: Core Board: Arduino Due

I'm trying to read multiple analog sensors with the Due board. Reading one sens…or works fine, but when I try to read two or more, the device returns garbage. This same code works fine on the Uno. I found a web posting about this issue and it has a work around that doesn't seem to work anymore. Also, analogReference() does not compile with the due. Here's my code: ``` int a, b, c, d; void setup() { Serial.begin(9600); Serial.println("Program is Starting"); } void loop() { a=analogRead(0); delay(50); a=analogRead(0); b=analogRead(1); delay(50); b=analogRead(1); c=analogRead(2); delay(50); c=analogRead(2); d=analogRead(3); delay(50); d=analogRead(3); Serial.print("Port 0 "); Serial.println(a); Serial.print("Port 1 "); Serial.println(b); Serial.print("Port 2 "); Serial.println(c); Serial.print("Port 3 "); Serial.println(d); delay(1000); } ```

replace the file Arduino/hardware/arduino/sam/cores/arduino/wiring_analog.c
with the file here: https://raw.github.com/arduino/Arduino/a1c48091051bfc7f3366cac6fc23212c4e4fb4a3/hardware/arduino/sam/cores/arduino/wiring_analog.c

Thanks

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analogRead problem with IDE 1.5.5 libraries

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