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PWM Example

Introduction

This example is a PWM HAL functional test program, focusing on verifying multi-channel simultaneous output, dynamic adjustment of frequency/duty cycle, and readback verification.

Source location: src/rtsmart/examples/peripheral/pwm/test_pwm.c

Example Behavior

• Map PWM0/PWM1 to PIN42/PIN43 respectively

• Perform dual-channel synchronous output test after PWM initialization

• Dynamically adjust frequency and duty cycle at runtime

• Execute frequency test scenarios such as synchronous/independent/rapid switching

• Finally disable the channel and deinitialize

Key Interfaces

• drv_pwm_init() / drv_pwm_deinit()

• drv_pwm_set_freq() / drv_pwm_get_freq()

• drv_pwm_set_duty() / drv_pwm_get_duty()

• drv_pwm_enable() / drv_pwm_disable()

• drv_fpioa_set_pin_func()

Build and Run

cd src/rtsmart/examples/peripheral/pwm
make
./test_pwm

This example has no command-line arguments.

Hint

For PWM interface details, please refer to PWM API Documentation.