ADC Multiple SOC EPWM

Table of Contents

• Introduction
• External Connections
  • AM263X-CC
  • AM263X-LP
• Supported Combinations
• Steps to Run the Example
• See Also
• Sample Output

Introduction

This example sets up ePWM0 to periodically trigger a set of conversions(SOC 0,1,2) on ADC0 and ADC1. This example demonstrates multiple ADCs working together to process of a batch of conversions using the available parallelism across multiple ADCs.

Module Block diagram

The example does the below

• Configures SOC0,1,2 of ADC0 and ADC1 to be triggered by EPWM0.
• Configures ADC interrupt 0 to be generated at end of conversion of SOC0.
• ADC0 Interrupt ISR is used to read results of both ADC0 and ADC1.

Watch Variables

• The watch variables gAdc0Result0, gAdc0Result1, gAdc0Result2, gAdc1Result0, gAdc1Result1, gAdc1Result2 storing ADC conversion outputs can be used to view the results.

External Connections

• ADC0_AIN0, ADC0_AIN1, ADC0_AIN2 and ADC1_AIN0, ADC1_AIN1, ADC1_AIN2 pins should be connected to signals to be converted.

AM263X-CC

When using AM263x-CC with TMDSHSECDOCK (HSEC180 controlCARD Baseboard Docking Station)

• Feed analog inputs (non-zero voltage) to HSEC Pin 12, HSEC Pin 14, HSEC Pin 15 and HSEC Pin 18, HSEC Pin 20, HSEC Pin 21

AM263X-LP

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 nortos
Toolchain	ti-arm-clang
Board	am263x-cc, am263x-lp
Example folder	examples/drivers/adc/adc_multiple_soc_epwm/

Steps to Run the Example

• When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
• When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
• Establish connections as mentioned in External Connections section.
• Launch a CCS debug session and run the executable, see CCS Launch, Load and Run
• Using the watch variables, view the ADC conversion results.
• View the ADC conversion results in UART console logs

See Also

ADC

Sample Output

Shown below is a sample output when the application is run,

ADC EPWM Triggered Conversion Test Started ...
ADC0 SOC0 : SOC1 : SOC2 : ADC1 SOC0 : SOC1: SOC2 Result register value :
3379 : 2364 : 1524 : 3371 : 2348 : 2364
1158 : 2314 : 1519 : 1306 : 2316 : 2312
1158 : 2314 : 1522 : 1306 : 2316 : 2313
1157 : 2314 : 1524 : 1306 : 2316 : 2312
1158 : 2313 : 1520 : 1306 : 2316 : 2312
1158 : 2313 : 1523 : 1306 : 2316 : 2312
1158 : 2314 : 1522 : 1306 : 2316 : 2312
1158 : 2313 : 1520 : 1307 : 2316 : 2312
1157 : 2313 : 1527 : 1306 : 2316 : 2312
1158 : 2314 : 1522 : 1306 : 2316 : 2312
1158 : 2314 : 1518 : 1306 : 2316 : 2312
ADC EPWM Triggered Conversion Test Passed
All tests have passed!!