AM62L FreeRTOS SDK  11.00.00
ECAP APWM mode

Introduction

This example uses the ECAP in APWM mode to generate a PWM signal.

The example does the below

  • Configures ECAP in APWM mode and configures values in period and compare registers
  • Waits for the specified time using the ECAP ISR.

External Connections

AM62LX-EVM

  • This example uses the user expansion connector (J2) in the board for testing on AM62LX-SK.
  • All pin numbers are on the expansion connector in the board.
  • The pins configured for the example is enabled on user expansion connector based on the FET selection switch(FET_SEL0).
  • The SOC_VOUT0_DATAn are the input to FET switches. The pins that are configured for the example are pinmuxed with the FET switches.
  • The S0 select pin decides if the configured pins (which is pinmuxed with SOC_VOUT0_DATAn) map to HDMI or USER EXP connector.
  • The S0 pin is triggered to a high value in the software. When the S0 is high, the pin that is configured for the example (which is pinmuxed with SOC_VOUT0_DATAn) will be available on the user expansion connector.

The below diagram depicts the selection:

S2 S1 S0 IP(nA)/OP(nB1 (Or) nB2)
H H L nA=nB1 -> SOC - HDMI
H H H nA=nB2 -> SOC - GPIO EXP CONN

Below is the connection details.

  • The signal can be probed from Pin 24 of the User Expansion Connector (J2) on the base board.

Supported Combinations

Parameter Value
CPU + OS a53ss0-0 nortos
a53ss0-0 freertos
Toolchain arm.gnu.aarch64-none
Board am62lx-evm
Example folder examples/drivers/ecap/ecap_apwm_mode/

Steps to Run the Example

See Also

ECAP

Sample Output

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

ECAP APWM Mode Test Started ...
ECAP APWM Test Passed!!
All tests have passed!!