help with the AD1851

blazin961 · 29th March 2007, 02:31 PM

Hi, I'm looking for help with a project I'm working on using the AD1851 DAC. To test it I am trying to play a wav file that is just a tone but no matter what i play i just get a nonsensible output.

I am outputing to the DAC using a general purpose DSP from motorola that reads the flash memory and sends it to the DAC. I am sending the data at 7.5MHz which is within the 12.5MHz spec. Ive pretty much checked over everything including send MSB first.

I am using a timer interrupt that sends 16 bits every 22.727272us which is 44000Hz.
I think the problem is due to two's complement but for all i know it could be the timing in general or some other problem.

Thanks, Blazin

Luckyboydtt · 10th December 2007, 08:17 AM

Can you send me your code. We can check it together because I'm doing with this device. Thanks

29th March 2007, 02:31 PM	#1
blazin961 diyAudio Member Join Date: Mar 2007	help with the AD1851 Hi, I'm looking for help with a project I'm working on using the AD1851 DAC. To test it I am trying to play a wav file that is just a tone but no matter what i play i just get a nonsensible output. I am outputing to the DAC using a general purpose DSP from motorola that reads the flash memory and sends it to the DAC. I am sending the data at 7.5MHz which is within the 12.5MHz spec. Ive pretty much checked over everything including send MSB first. I am using a timer interrupt that sends 16 bits every 22.727272us which is 44000Hz. I think the problem is due to two's complement but for all i know it could be the timing in general or some other problem. Thanks, Blazin

10th December 2007, 08:17 AM	#2
Luckyboydtt diyAudio Member Join Date: Dec 2007	Hi Can you send me your code. We can check it together because I'm doing with this device. Thanks

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