add api for stddevice.PWM and support rtDevice_PWM

package/PikaStdDevice/PikaStdDevice.py

@@ -184,12 +184,27 @@ class PWM(TinyObj):
     def init():
         pass
 
+    def setName(name: str):
+        pass
+
+    def getName() -> str:
+        pass
+
+    def setChannel(ch: int):
+        pass
+
+    def getChannel() -> int:
+        pass
+
     def setPin(pin: str):
         pass
 
     def setFrequency(freq: int):
         pass
 
+    def setFreq(freq: int):
+        pass
+
     def setDuty(duty: float):
         pass
 

package/PikaStdDevice/PikaStdDevice_PWM.c

@@ -2,8 +2,10 @@
 #include "BaseObj.h"
 
 void PikaStdDevice_PWM_init(PikaObj* self) {
-    obj_setStr(self, "pin", "PA8");
+    obj_setStr(self, "pin", "none");
+    obj_setStr(self, "name", "none");
     obj_setInt(self, "freq", 1000);
+    obj_setInt(self, "ch", 0);
     obj_setFloat(self, "duty", 0.5f);
 }
 
@@ -49,3 +51,23 @@ void PikaStdDevice_PWM_platformSetFrequency(PikaObj* self) {
     obj_setErrorCode(self, 1);
     obj_setSysOut(self, "[error] platform method need to be override.");
 }
+
+char* PikaStdDevice_PWM_getName(PikaObj* self) {
+    return obj_getStr(self, "name");
+}
+
+void PikaStdDevice_PWM_setName(PikaObj* self, char* name) {
+    obj_setStr(self, "name", name);
+}
+
+void PikaStdDevice_PWM_setChannel(PikaObj* self, int ch) {
+    obj_setInt(self, "ch", ch);
+}
+
+int PikaStdDevice_PWM_getChannel(PikaObj* self) {
+    return obj_getInt(self, "ch");
+}
+
+void PikaStdDevice_PWM_setFreq(PikaObj* self, int freq) {
+    PikaStdDevice_PWM_setFrequency(self, freq);
+}

package/pikaRTDevice/pikaRTDevice.py

@@ -19,3 +19,17 @@ class GPIO(PikaStdDevice.GPIO):
 
     def platformRead():
         pass
+
+
+class PWM(PikaStdDevice.PWM):
+    # override
+    def platformEnable():
+        pass
+
+    # override
+    def platformSetFrequency():
+        pass
+
+    # override
+    def platformSetDuty():
+        pass

package/pikaRTDevice/pikaRTDevice_PWM.c

@@ -0,0 +1,32 @@
+#include "pikaRTDevice_PWM.h"
+#include <rtdevice.h>
+#include <rtthread.h>
+
+struct rt_device_pwm* PWM_getDevice(PikaObj* self) {
+    char* name = obj_getStr(self, "name");
+    rt_device_t pwm_device = rt_device_find(name);
+    if(NULL == pwm_device){
+        printf("[error] PWM: device \"%s\" no found.\r\n", name);
+    }
+    return (struct rt_device_pwm*)pwm_device;
+}
+
+void pikaRTDevice_PWM_platformEnable(PikaObj* self) {
+    struct rt_device_pwm* pwm_dev = PWM_getDevice(self);
+    int ch = obj_getInt(self, "ch");
+    rt_pwm_enable(pwm_dev, ch);
+}
+
+void pikaRTDevice_PWM_platformSetDuty(PikaObj* self) {
+    struct rt_device_pwm* pwm_dev = PWM_getDevice(self);
+    int ch = obj_getInt(self, "ch");
+    int freq = obj_getInt(self, "freq");
+    float duty = obj_getFloat(self, "duty");
+    int period = (int)((1.0 / (float)freq) * 1000 * 1000);
+    int pulse = (int)((float)period * duty);
+    rt_pwm_set(pwm_dev, ch, period, pulse);
+}
+
+void pikaRTDevice_PWM_platformSetFrequency(PikaObj* self) {
+    pikaRTDevice_PWM_platformSetDuty(self);
+}