MSPM0C1104: how to get adc results in different channels

bill.liao

Part Number: MSPM0C1104
Other Parts Discussed in Thread: MSPM0G3507, SYSCONFIG

hi, experts:

We used CCS Theia 1.3.1 to configure and generate code, as known in datasheet, mspm0c1104 has a ADC with up to 10 external channels, but I've no idea how to set the channels in CCS Theia, it seems it could only set one channel. Could you help to show how to get adc results from different channels? All the example codes show only one channel sampling. Thanks.

Bill

over 1 year ago

+1 Zoey Wei over 1 year ago

TI__Genius 10611 points

Hi Bill,

Please refer to MSPM0G3507 demo code ...:\ti\mspm0_sdk_1_30_00_03\examples\nortos\LP_MSPM0G3507\driverlib\adc12_sequence_conversion

You can set different channel through SysConfig

Zoey

0 bill.liao over 1 year ago in reply to Zoey Wei

Intellectual 325 points

Hi, Zoey:

Thanks for your quick response, I do have some more questions to ask:

1. the sequence way only support 4 channels, if over 4 channels are required, then how to do with that?

2. I noted that in this example, Sample Time can be set other than conversions numbers, so does it mean we don't know how many conversions numbers will be accumulated when we choose to set sample time? I don't quite understand these two concepts.

Bill

+1 Zoey Wei over 1 year ago in reply to bill.liao

TI__Genius 10611 points

Hi Bill,

1. I will check and do experiment from my side

2. The sample time you set is for one time. If you do not enable repeat mode, it will transfer one time, and you can read memory.

If you enable repeat mode, it will continue to transfer until you disable ADC

0 bill.liao over 1 year ago in reply to Zoey Wei

Intellectual 325 points

Hi, zoey:

Thank you very much, your answer 2 is very helpful.

Bill

0 Zoey Wei over 1 year ago in reply to bill.liao

TI__Genius 10611 points

Hi Bill,

MSPM0C only support 4 memory, which means if you configurate sequence, you can only read four channels and than, change the memory - channel to read other four channels...

Zoey

0 bill.liao over 1 year ago in reply to Zoey Wei

Intellectual 325 points

Hi, Zoey:

You mean to call ADC api to change the memory-channel to read other four channels? Can you show the api calling process? Thanks!

Bill

0 Zoey Wei over 1 year ago in reply to bill.liao

TI__Genius 10611 points

Hi Bill,

Here is the demo code I write to realize 8 channels ADC, please feel free to use that.

N.B. The channel 6 is reuse the SWD pin, as you use this pin as ADC channel, you can not connect MCU through SWD

tidrive.ext.ti.com/.../953b29e8-7648-43be-aef9-c9c39246f248

password:5Pu.ww4P

Zoey

0 bill.liao over 1 year ago in reply to Zoey Wei

Intellectual 325 points

Hi, Zoey:

Thanks for your strong support, but I can't access to the link you share, the failure is as the screen show, I entered my email as usr id along with the psw, but can't pass.

Bill