TMS570LS1224: Can I set a Word Length of 1 for ADC2 Group1?

SACHIN BABYRAJAN

Part Number: TMS570LS1224

I am using only one channel in ADC2 Group1 for sampling current. Can I set a word length of 1 in ADC2 memory configuration? I can set only integer values in BNDB value ? I am getting only minimum 2 word length. Is there any configuration for that?

over 4 years ago

0 QJ Wang over 4 years ago

TI__Guru**** 198766 points

Hi Sachin,

The ADC stores the conversion results in 3 separate memory regions in the ADC results' RAM. Each memory region is a stack of buffers, with each buffer capable of holding one conversion result.

The number of buffers allocated for each group is programmable. The minimum buffer for each region is 2.

0 SACHIN BABYRAJAN over 4 years ago in reply to QJ Wang

Prodigy 180 points

Hi QJ,

If I am using only one channel, and I am using minimum buffer =2, What is the best method to read the ADC value with out any delay?

+1 QJ Wang over 4 years ago in reply to SACHIN BABYRAJAN

TI__Guru**** 198766 points

Hello Sachin,

You can read the conversion results directly from ADC RAM.

The ADC2 result memory is: 0xFF3A0000

If the ADC2 Event group has 8 buffers, and Group1 has 2 buffers, you can read the Group1 Buffer 1 at 0xFF3A000+(8-1)*4 + 1*4 = 0xFF3A020

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TMS570LS1224: Can I set a Word Length of 1 for ADC2 Group1?