v1.2.2 to replace double with float

### Releases v1.2.2

1. Use `float` for `DutyCycle` and `Freq`, `uint32_t` for `period`. 
2. Optimize code by not calculation in ISR

Author: khoih-prog

README.md

@@ -510,12 +510,12 @@ typedef struct
   irqCallback   irqCallbackStopFunc;
 
 #if USING_PWM_FREQUENCY  
-  double        PWM_Freq;
+  float         PWM_Freq;
 #else  
-  double        PWM_Period;
+  uint32_t      PWM_Period;
 #endif
   
-  double        PWM_DutyCycle;
+  float         PWM_DutyCycle;
   
   uint64_t      deltaMicrosStart;
   uint64_t      previousMicrosStart;

examples/ISR_16_PWMs_Array_Complex/ISR_16_PWMs_Array_Complex.ino

@@ -116,12 +116,12 @@ typedef struct
   irqCallback   irqCallbackStopFunc;
 
 #if USING_PWM_FREQUENCY  
-  double        PWM_Freq;
+  float         PWM_Freq;
 #else  
-  double        PWM_Period;
+  uint32_t      PWM_Period;
 #endif
 
-  double        PWM_DutyCycle;
+  float         PWM_DutyCycle;
 
   uint64_t      deltaMicrosStart;
   uint64_t      previousMicrosStart;