TI中文支持网Part Number:TDA4VE-Q1
外设有这样需求，相位保持一样，频率不同，频率例子（EPWM0，A通道30KHZ，EPWM1 A通道15KHZ）
先处理相位，遇到问题如下，
测试引脚为EPWM0/EPWM1的通道A，同频率，示波器显示相位没有对齐，请问怎样对齐
请问怎样对齐
软件的操作
我们在epwm打开dts节点测试
board-support\linux-kernel\arch\arm64\boot\dts\ti\k3-j784s4-evm.dts
&main_ehrpwm0 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&main_epwm0_pins_default>;
};
&main_ehrpwm1 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&main_epwm1_pins_default>;
};
cat pwm.sh if [ ! -d /sys/class/pwm/pwmchip0/pwm0/ ];then echo 0 > /sys/class/pwm/pwmchip0/export fi echo 25000 > /sys/class/pwm/pwmchip0/pwm0/period echo 20000 > /sys/class/pwm/pwmchip0/pwm0/duty_cycle echo 1 >/sys/class/pwm/pwmchip0/pwm0/enable if [ ! -d /sys/class/pwm/pwmchip2/pwm0/ ];then echo 0 > /sys/class/pwm/pwmchip2/export fi echo 25000 > /sys/class/pwm/pwmchip2/pwm0/period echo 20000 > /sys/class/pwm/pwmchip2/pwm0/duty_cycle echo 1 > /sys/class/pwm/pwmchip2/pwm0/enable if [ ! -d /sys/class/pwm/pwmchip4/pwm0/ ];then echo 0 > /sys/class/pwm/pwmchip4/export
Cherry Zhou：
您好，您的问题我们需要升级到英文论坛寻求帮助，链接如下：
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1257381/tda4ve-q1-the-tda4vh-epwm-phase-is-the-same-with-different-frequencies
,
Cherry Zhou：
您好，请看以下答复：
从您的描述来看，您能够获得正确的 PWM 周期/ DUTY_CYCLE。
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/800572/linux-pwm-signals-synchronization/2963166#2963166
请参阅以上帖子看下是否对您有帮助。
