TMS320F28P550SJ: Sysconfig PinMux_Init

Hi Ari,

Could you send your .syscfg file? I'm assuming you're using version 5.02 of C2000Ware from ti.com. When I test this on my end, GPIO28 is configured to disable analog mode:

Thank you,

Luke

Hi Luke,

I couldn't figure out how to upload the .syscfg file. It's the same as the "adc_ex2_soc_epwm" example, it just includes "Device Support" to be able to switch to the internal oscillator. My board does not have an external crystal. Is there a way to configure the .syscfg file to choose which pins I want to be analog? And I don't understand why once configured as analog, I can't make the pin become an SCI pin for example?

Ari

Hi Ari,

You can upload a .syscfg file using the "Insert" tab when writing a message in E2E. I'm a bit confused on what you are trying to do. Do you want GPIO28 and GPIO29 to be analog or digital pins? To do SCI communication, these pins will need to configured as digital.

To designate pins as analog in SysConfig, you need to add an ADC instance in the SysConfig GUI by pressing the "ADD" button at the top of the ADC GUI.

Thank you,

Luke

Hi Luke,

 Insert: "Image/Video/File"? Should I manually enter the file path?

 I started the project from the "adc_ex2_soc_epwm"  example, which uses sysconfig to configure the ADC. Sysconfig configures the GPIO28 as analog, using: 

   GPIO_setAnalogMode(28, GPIO_ANALOG_ENABLED);

 I was trying to configure the GPIO28 pin as SCI_RX using:

Board_init();  

GPIO_setAnalogMode(28U, GPIO_ANALOG_DISABLED);
GPIO_setPinConfig(GPIO_28_SCIA_RX);
GPIO_setDirectionMode(28U, GPIO_DIR_MODE_IN);
GPIO_setPadConfig(28U, GPIO_PIN_TYPE_STD);
GPIO_setQualificationMode(28U, GPIO_QUAL_ASYNC);

I discovered that I need to convert GPOIO28 to digital before configuring it to be SCIA_RX, using the code below:

GPIO_setAnalogMode(28U, GPIO_ANALOG_DISABLED);

Now the only question remains is how to configure sysconfig so that GPIO28 is not configured as analog?

Ari.

Hi Ari,

You should move your ADC to another pin if you want to configure GPIO28 as digital SCIA_RX. No additional code should be needed outside of Board_init(). Does the issue still persist after moving your ADC to another pin?

Thank you,

Luke

Hi Luke,

 If you import the adc_ex2_soc_epwm example, and compile it, you will notice that sysconfig initializes all pins that can be analog as analog. In the PinMux_init() function called in Board_Init(). I couldn't figure out how to configure sysconfig to be able to choose which pins I want to be analog. 

 What does "any" mean in the ADC pin configuration?

It doesn't matter if I set it to "any" or not, all pins are configured as analog in Board_Init();