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!!