TMS570LS3137: ADC stop a conversion while conversion is in progress

li qunxiong

Part Number: TMS570LS3137

Hello,

If the conversion is in progress,and I clear the channel select register to stop the conversion,will the conversion currently in progress continue to be completed and written to result memory, or will it be discarded directly?

Thanks.

over 4 years ago

0 QJ Wang over 4 years ago

TI__Guru**** 197036 points

Hi,

During a Conversion, Writing 0x00000000 to ADGxSEL stops the Groupx conversions.

For example, say channels 0,2,4 and 6 are selected for conversion in Group 1 in single-conversion mode. When the Group1 gets serviced, the ADC will start conversion for channel 0, then channel 2, then channel 4, and then channel 6. If you clear the ADG1SEL register during conversion for channel 4, the conversion for channel will be stopped immediately. The ADC Group1 conversion memory contains only the result of channel 0 and channel 2.

0 li qunxiong over 4 years ago in reply to QJ Wang

Intellectual 335 points

Hi QJ Wang,

How to enter ADC's emulation mode?I didn't found it in the manual,thanks.

0 QJ Wang over 4 years ago in reply to li qunxiong

TI__Guru**** 197036 points

There is one buffer for each conversion group. Reading from those 3 buffers do not affect the status flags in group's flag registers. Those registers are very useful for debug. Emulation mode means you read the conversion result from those 3 buffers:

1. ADEVEMUBUFFER

2. ADG1EMUBUFFER

3. ADG2EMUBUFFER

0 li qunxiong over 4 years ago in reply to QJ Wang

Intellectual 335 points

I want to know how to switch from normal mode to emulation mode?Thanks.

0 QJ Wang over 4 years ago in reply to li qunxiong

TI__Guru**** 197036 points

Emulation mode is used by debugger tools to stop the CPU at breakpoints to read registers.

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TMS570LS3137: ADC stop a conversion while conversion is in progress