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HALCOGEN: How to configure the ADC using HALCOGEN? Is there an action routine?

Ben Qin
Intellectual 2690 points

Part Number: HALCOGEN
Other Parts Discussed in Thread: TMS570LS1224

Hi Team,

There's an issue from the customer need your help:

How to configure the ADC using HALCOGEN? Is there an action routine? Like this, the more detailed the better, thank you! 

Could you help check this case please? Thanks.

Best Regards,

Ben

  • 0 in reply to QJ Wang
    TI__Guru**** 200256 points
    1. launch HALCoGen
    2. To create a new HALCoGen project: File → New → Project
    3. If you use TMS570LS1224 Lauchpad, Choose
        Family: TMS570LS12x,
        Device:TMS570LS1224PGE
        
    4. Then define a project name and Location
    5. The next step is to enable the appropriate drivers
    6. Enable MIBADC1 drivers in the „Driver Enable‟ sub tab of the device
        
    7. From the MIBADC1 Group1 tab (or Group2, or Group Event), configure FIFO Size, Trigger Source and ADC channel
        
    8. Generate code: File → Generate Code
  • 0 in reply to QJ Wang
    TI__Guru**** 200256 points
    1. Cycle time and Sample Time for the ADC?
       
    Cycle time is the period of the ADCCLK. The ADCCLK is the reference clock by which it uses to operate the conversion.
    Sample Time is the sample window in the device TRM. The minimum sample time is specified in device datasheet. 
    Please refer to this application note about ADC source impedance. It details the requirement for calculating the sampling time necessary based on the impedance of the circuit driving the ADC input. http://www.ti.com/lit/an/spna118b/spna118b.pdf
    2. Sample capacitor discharge mode and sample time
    The discharge mode allows the charge on the ADC core’s internal sampling capacitor to be discharged before starting the sampling phase of the next channel. The sample capacitor discharge mode does not help in reducing the sampling time required unless the next channel to be converted has a level close to ground. The actual sample time required for the charge on the sampling capacitor to settle within 2 counts of the external input is dictated by the external source impedance characteristics. Please refer to spna118b.pdf.
    3. FIFO size
    If you want to generate interrupt to the CPU after all channels are converted then you should put # of ADC channel as your FIFO size. In my example, 6 ADC channels are selected (pin 0, pin 1, ... pin 5), so FIFO size is 6.
    If you don't want to generate interrupt, you can configure FIFO size to be multiple of ADC channels, for example 2*6, or 3*6
  • 0 in reply to QJ Wang
    TI__Guru**** 200256 points

    Here is the example:

    ADC Pin 0 and Pin 1 are used in the example. The sampling is triggered by rising edge of signal at GIOB0.

    The sampled value is displayed on UART console, the UART baudrate is 9600.

    myExample.zip

  • 0 in reply to QJ Wang
    TI__Intellectual 2690 points

    Hi Wang,

    Thanks for your great help.

    How does HALCOGEN font size adjust? The font is too small to see after generating code. 

    If one of the ADC interfaces is selected, as shown in the figure below, how do I configure the VU size? 

    Best Regards,

    Ben

  • 0 in reply to Ben Qin
    TI__Guru**** 200256 points

    Hi Ben,

    Ben Qin said:
    How does HALCOGEN font size adjust?

    HALCoGen GUI is not designed to scale with the user's desktop resolution setting. We can't adjust the font size.

    Ben Qin said:
    If one of the ADC interfaces is selected, as shown in the figure below, how do I configure the VU size? 

    This is not from HalCOGen GUI. I don't know how to change the resolution or font size of the screenshot posted onto E2E thread.

  • 0 in reply to QJ Wang
    TI__Intellectual 2690 points

    Hi Wang,

    Ben Qin said:
    If one of the ADC interfaces is selected, as shown in the figure below, how do I configure the VU size? 

    Sorry for the translation problem. It should be:

    how do I configure the HALCOGEN to get the VU's value.

    Best Regards,

    Ben

  • 0 in reply to QJ Wang
    TI__Intellectual 2690 points

    Hi Wang,

    The customer said the picture seems a different software, is there a download link?

    Best Regards,

    Ben

  • 0 in reply to Ben Qin
    TI__Guru**** 200256 points

    Hi Ben,

    If you use Altium to design or view the schematics, you can zoom in/out the display by selecting View->Zoom IN or Zoom Out command from the main menu. The font size can be changed from Preferences -> Schematic.

  • 0 in reply to QJ Wang
    TI__Intellectual 2690 points

    Hi Wang,

    Thanks for your response.

    What should I do after generating the code? And what's next after choosing one of the ADC interface?

    Best Regards.

    Ben

  • 0 in reply to Ben Qin
    TI__Guru**** 200256 points

    Hi Ben,

    You can use the ADC APIs generated by HAL in your application:

    For example:

    /* initialize ADC */
    /* Groupx and Pins, trigger source etc */
    adcInit();

    /* start adc conversion */
    adcStartConversion(adcREG1,adcGROUP1);

    /* wait and read the conversion count */
    while((adcIsConversionComplete(adcREG1,adcGROUP1))==0);
    ch_count = adcGetData(adcREG1, adcGROUP1,&adc_data[0]);

    /* conversion results : */
    /* adc_data[0] -> should have conversions for Group1 channel1 */
    /* adc_data[1] -> should have conversions for Group1 channel2 */
    id = adc_data[0].id;
    value = adc_data[0].value;

  • 0 in reply to QJ Wang
    TI__Intellectual 2690 points

    Hi Wang,

    How to use that? Can I import HAL project into CCS?

    Best Regards,

    Ben

  • 0 in reply to Ben Qin
    TI__Guru**** 200256 points

    Hi Ben,

    This application note will help you create A HALCoGen-Based Project For CCS:

    https://www.ti.com/lit/an/spna121b/spna121b.pdf?ts=1668696157896&ref_url=https%253A%252F%252Fwww.google.com%252F