TMS320F28377D: 16-bit ADC code generates a 12-bit result

兆顺邓

Part Number: TMS320F28377D
Other Parts Discussed in Thread: C2000WARE,

I am trying to modify the ADC examples of TMS320F28377D in C2000Ware from 12-bit single-ended mode to 16-bit differential mode. Solely changing the parameters in the AdcSetMode() function in the bit-filed example or changing the macro definition EX_ADC_RESOLUTION in the driverlib example cannot work, as the result is still 12-bit. Can anyone provide me the basic code that works for 16 bit ADC, or just give me any advice?

over 1 year ago

0 Santosh Jha over 1 year ago

TI__Guru 50470 points

Hi,

The subject matter expert is out of office due to holiday break. Please expect response by 1st week of January. Sincere apology for inconvenience.

Regards, Santosh

0 GINILY over 1 year ago

Intellectual 445 points

Hi,

For 16bit ADC mode:

1. Hardware inputs should be differential;

2. ADCCTL2 SIGNALMODE =1, RESOLUTION=1;

3. ADCSOC0CTL ACQPS is a larger number for 16bit mode (may try with 119 for 200MHz clock).

Hope these could help you!

Thanks for reaching out to me.

Best Regards,

Lily

0 兆顺邓 over 1 year ago in reply to GINILY

Prodigy 25 points

I solved my problem by unlocking the 16-bit mode using the method described in TMS320F28377D how to configure 16-Bit AD-conversion?

It seems strange every time after the device powered up, I need to take these complex measures to unlock the 16-bit mode.... Is there any way to avoid it?

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TMS320F28377D: 16-bit ADC code generates a 12-bit result