fix: pwm,setDuty和setFreq没有立即生效,添加对应的demo

demo/pwm_new/main.lua

@@ -0,0 +1,44 @@
+
+-- LuaTools需要PROJECT和VERSION这两个信息
+PROJECT = "pwmdemo"
+VERSION = "1.0.0"
+
+log.info("main", PROJECT, VERSION)
+
+-- sys库是标配
+_G.sys = require("sys")
+
+--添加硬狗防止程序卡死
+if wdt then
+    wdt.init(9000)--初始化watchdog设置为9s
+    sys.timerLoopStart(wdt.feed, 3000)--3s喂一次狗
+end
+
+local PWM_ID = 4
+
+sys.taskInit(function()
+    log.info("pwm", "ch", PWM_ID)
+    pwm.setup(PWM_ID, 1000, 90)
+    pwm.start(PWM_ID)
+    while 1 do
+        -- 仿呼吸灯效果
+        log.info("pwm", ">>>>>")
+        for i = 10,1,-1 do 
+            pwm.setDuty(PWM_ID, i*9) -- 频率1000hz, 占空比0-100
+            -- pwm.setFreq(PWM_ID, 1000 + i*10)
+            sys.wait(100 + i*10)
+        end
+        for i = 10,1,-1 do 
+            pwm.setDuty(PWM_ID, 100 - i*9)
+            -- pwm.setFreq(PWM_ID, 1000 - i*10)
+            sys.wait(100 + i*10)
+        end
+        sys.wait(2000)
+    end
+    pwm.stop(PWM_ID)
+end)
+
+-- 用户代码已结束---------------------------------------------
+-- 结尾总是这一句
+sys.run()
+-- sys.run()之后后面不要加任何语句!!!!!

demo/pwm_new/pins_Air780EPM.json

@@ -0,0 +1,6 @@
+{
+    "pins" : [
+        [16, "PWM4"]
+    ],
+    "pins_debug" : true
+}

luat/modules/luat_lib_pwm.c

@@ -153,7 +153,8 @@ static int l_pwm_set_duty(lua_State *L) {
         return 0;
     }
     confs[channel]->pulse = luaL_checkinteger(L, 2);
-    lua_pushboolean(L, 1);
+    int ret = luat_pwm_setup(confs[channel]);
+    lua_pushboolean(L, ret == 0 ? 1 : 0);
     return 1;
 }
 static int l_pwm_set_freq(lua_State *L) {
@@ -162,7 +163,8 @@ static int l_pwm_set_freq(lua_State *L) {
         return 0;
     }
     confs[channel]->period = luaL_checkinteger(L, 2);
-    lua_pushboolean(L, 1);
+    int ret = luat_pwm_setup(confs[channel]);
+    lua_pushboolean(L, ret == 0 ? 1 : 0);
     return 1;
 }