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Bug? Audio output doesn't seem to be working.

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Bug? Audio output doesn't seem to be working.

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NeXT-Generation

Senior Roboticist

Joined: Wed Sep 28, 2011 10:13 pm
Posts: 630
Location: If I told you, I'd have to kill you.

Bug? Audio output doesn't seem to be working.

I have a Piezo buzzer connected with the "+" to digital port 10, and the "-" to GND. If I use this code:


	Code: #pragma config(CircuitBoardType, typeCktBoardUNO) #pragma config(UART_Usage, UART0, uartSystemCommPort, baudRate200000, IOPins, dgtl1, dgtl0) #pragma config(Motor, servo_10, , tmotorAudio, openLoop, IOPins, None, None) //!!Code automatically generated by 'ROBOTC' configuration wizard !!// task main() { for(int i = 0; i <= 127; i++) { motor[servo_10] = i; wait1Msec(400); } }

Then it should do an upward sweep of tones, right? Instead, it gives me this error screen:


	Attachment: File comment: ERROR! RobotC_exception.jpg [ 53.98 KiB \| Viewed 2379 times ]

Am I doing this right? Or is it a bug?

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Fri May 18, 2012 9:13 am

Dennis Mabrey

Rookie

Joined: Mon May 14, 2012 3:24 pm
Posts: 43

Re: Bug? Audio output doesn't seem to be working.

Not at computer so just guessing but did you try it on port 5 or 6 ? 9 & 10 normally used for servo motors and maybe the code doesn't like you using it for generating a tone.

Fri May 18, 2012 7:38 pm

NeXT-Generation

Senior Roboticist

Joined: Wed Sep 28, 2011 10:13 pm
Posts: 630
Location: If I told you, I'd have to kill you.

Re: Bug? Audio output doesn't seem to be working.


	Dennis Mabrey wrote: Not at computer so just guessing but did you try it on port 5 or 6 ? 9 & 10 normally used for servo motors and maybe the code doesn't like you using it for generating a tone.

Here's what I've tried: (these are all the standard variable intensity commands as far as I can tell)


	Code: #pragma config(Motor, servo_10, , tmotorAudio, openLoop, IOPins, None, None) #pragma config(Motor, motor_5, , tmotorVariableIntensityLED, openLoop, reversed, IOPins, dgtl5, None) #pragma config(Motor, motor_6, , tmotorAnalogWrite, openLoop, IOPins, dgtl6, None)

None of these produce any results. Any other ideas? Has anybody else tried this?

Fri May 18, 2012 11:48 pm

Dennis Mabrey

Rookie

Joined: Mon May 14, 2012 3:24 pm
Posts: 43

Re: Bug? Audio output doesn't seem to be working.

Yes I get the same error. Using a logic analyzer it seems only the external h-bridge types are working.

Nothing else appears to work properly. analogWrite and variable LED do not generate a PWM signal.

Servos don't work as well. For example setting the motor value to 126 only generates a 9% duty cycle:


	Code: #pragma config(CircuitBoardType, typeCktBoardUNO) #pragma config(UART_Usage, UART0, uartSystemCommPort, baudRate200000, IOPins, dgtl1, dgtl0) #pragma config(Motor, motor_6, , tmotorServoStandard, openLoop, IOPins, dgtl6, None) //!!Code automatically generated by 'ROBOTC' configuration wizard !!// task main(){ while(true){ motor[motor_6] = 126 ; } }

Changing the value didn't really change the signal much (value of 1 gave a 7% duty cycle).

More than likely they would not use the motor array to set these motor types anyway. Servos should be set by angle, audio by tone and duration, and analogWrite would be a value from 0-255.

It's beta so it just hasn't been implemented yet.

Sat May 19, 2012 12:14 pm

NeXT-Generation

Senior Roboticist

Joined: Wed Sep 28, 2011 10:13 pm
Posts: 630
Location: If I told you, I'd have to kill you.

Re: Bug? Audio output doesn't seem to be working.

Dennis Mabrey wrote:


	Code: #pragma config(CircuitBoardType, typeCktBoardUNO) #pragma config(UART_Usage, UART0, uartSystemCommPort, baudRate200000, IOPins, dgtl1, dgtl0) #pragma config(Motor, motor_6, , tmotorServoStandard, openLoop, IOPins, dgtl6, None) //!!Code automatically generated by 'ROBOTC' configuration wizard !!// task main(){ while(true){ motor[motor_6] = 126 ; } }

(image ommited)

Changing the value didn't really change the signal much (value of 1 gave a 7% duty cycle).

More than likely they would not use the motor array to set these motor types anyway. Servos should be set by angle, audio by tone and duration, and analogWrite would be a value from 0-255.

It's beta so it just hasn't been implemented yet.

I suspected as much. But, I don't have a logic analyzer (or oscilliscope) so I couldn't be sure. I thought it was strange to have the "motor" command for all those things. Thanks for trying.

Sat May 19, 2012 12:41 pm

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