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MSPM0L1306: Read 8 analog signals with MSPM0L1306

albgarc2014
Genius 3570 points
Part Number: MSPM0L1306
Other Parts Discussed in Thread: SYSCONFIG

Hi TI!!!

I am new with MSPM0, however I would like to use it in a project.

In my project I need to measure 8 analog signals. Is this possible with the MSPM0L1306?
The MSPM0L1306 has more than 8 pins with analog capability, ok. But CCS allows to select only one pin as analog input.

Am I missing something or do I have to change the analog input pin dynamically in the firmware to read all signals?

What is the best way to read 8 analog signals with the MSPM0L1306?

Thanks very much. Best Regards.

  • 0
    TI__Genius 11150 points

    Hello,

    I am so sorry that I am sick today. I will check it and reply to you tomorrow.

  • 0
    TI__Genius 10921 points

    Hi,

    You need to add memory size and channel (max can be 4).

     

    If you want to read 8 ADC channel.

    Please change the channel-memory in you code.

    Here is demo code for MSPM0C: E2E_ADC_8Channels_sequence_C.zip for you reference

  • 0 in reply to Zoey Wei
    Genius 3570 points

    Hello Zoey Wei,

    Thanks very much for your answer.

    Correct, by increasing the ADC Configuration Memory (maximum allowed 4) sysconfig allows me to select up to 4 analog inputs. However I still don't understand in the example code you share with me how to achieve 8 analog input signals.


    We have the 4 analog input signals allowed by sysconfig, also in the code are defined:
    #define GPIO_ADC12_0_C4_PORT GPIOA
    #define GPIO_ADC12_0_C4_PIN DL_GPIO_PIN_22
    #define GPIO_ADC12_0_C5_PORT GPIOA
    #define GPIO_ADC12_0_C5_PIN DL_GPIO_PIN_28
    #define GPIO_ADC12_0_C7_PORT GPIOA
    #define GPIO_ADC12_0_C7_PIN DL_GPIO_PIN_18
    #define GPIO_ADC12_0_C8_PORT GPIOA
    #define GPIO_ADC12_0_C8_PIN DL_GPIO_PIN_16

    Which correspond to the pins of the other 4 analog signals.
    In the while loop, a first acquisition of 4 analog signals is performed and then a second acquisition of 4 other analog signals. Where are the inputs to be read in each acquisition set?

    Thanks very much. Best Regards

  • +1 in reply to albgarc2014
    TI__Genius 10921 points

    Hi The former GPIO is set through Sysconfig and you can find in "ti_msp_dl_config.h"

    The channel and pin are one-to-one.

    The step of my code is: use former four channels and then start the later four channels. In hardware is eight channels.

    B.R.

    Zoey