ADC Multiple SOC EPWM

Table of Contents

• Introduction
• Watch Variables
• External Connections
  • AM263PX-CC E2 or AM263X-CC E2 or AM261X-SOM E1
  • AM263X-CC E1
  • AM263X-LP or AM263X-LP
  • AM261X-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 ADC2 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 ADC2 and ADC1 to be triggered by EPWM0.
• Configures ADC interrupt 0 to be generated at end of conversion of SOC0.
• ADC2 Interrupt ISR is used to read results of both ADC2 and ADC1.

Watch Variables

• The watch variables gAdc2Result0, gAdc2Result1, gAdc2Result2, gAdc1Result0, gAdc1Result1, gAdc1Result2 storing ADC conversion outputs can be used to view the results.

External Connections

• ADC2_AIN0, ADC2_AIN1, ADC2_AIN2 and ADC1_AIN0, ADC1_AIN1, ADC1_AIN2 pins should be connected to signals to be converted.

AM263PX-CC E2 or AM263X-CC E2 or AM261X-SOM E1

When using AM263Px-CC E2 or AM263x-CC E2 with TMDSHSECDOCK (HSEC180 controlCARD Baseboard Docking Station)

• Feed analog inputs to the following.
  • ADC2_AIN0 - HSEC 25
  • ADC2_AIN1 - HSEC 27
  • ADC2_AIN2 - HSEC 31
  • ADC1_AIN0 - HSEC 12
  • ADC1_AIN1 - HSEC 14
  • ADC1_AIN2 - HSEC 18

AM263X-CC E1

When using AM263x-CC E1 with TMDSHSECDOCK (HSEC180 controlCARD Baseboard Docking Station)

• Feed analog inputs to the following.
  • ADC2_AIN0 - HSEC 24
  • ADC2_AIN1 - HSEC 26
  • ADC2_AIN2 - HSEC 28
  • ADC1_AIN0 - HSEC 18
  • ADC1_AIN1 - HSEC 20
  • ADC1_AIN2 - HSEC 21

AM263X-LP or AM263X-LP

When using LP

• Feed analog inputs to the following.
  • ADC2_AIN0 - J1/J3 25
  • ADC2_AIN1 - J5/J7 63
  • ADC2_AIN2 - J5/J7 68
  • ADC1_AIN0 - J1/J3 24
  • ADC1_AIN1 - J1/J3 29
  • ADC1_AIN2 - J5/J7 67

AM261X-LP

When using LP

• Feed analog inputs to the following.
  • ADC2_AIN0 - J1/3 25
  • ADC2_AIN2 - J5/7 65 | note this will require IO expander configurations. check schematics and syscfg for details.
  • ADC2_AIN3 - J1/3 6
  • ADC1_AIN0 - J1/J3 24
  • ADC1_AIN1 - J1/J3 42
  • ADC1_AIN2 - J5/J7 64

Supported Combinations

Parameter	Value
CPU + OS	r5fss0-0 nortos
Toolchain	ti-arm-clang
Board	am263px-cc, am263px-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 ...
ADC2 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!!