Linux5.4内核
使用PI11、PI12引脚作为PWM输出实例
修改设备树文件:/root/longan-h618/device/config/chips/h618/configs/1GB/linux-5.4/board.dts
增加PWM引脚描述:
注意:确保PI11、PI12两个引脚没有被其他地方占用
pwm1_pin_a: pwm1@0 {
pins = "PI11";
function = "pwm1";
drive-strength = <10>;
bias-pull-up;
};
pwm1_pin_b: pwm1@1 {
pins = "PI11";
function = "gpio_in";
};
pwm2_pin_a: pwm2@0 {
pins = "PI12";
function = "pwm2";
drive-strength = <10>;
bias-pull-up;
};
pwm2_pin_b: pwm2@1 {
pins = "PI12";
function = "gpio_in";