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

@@ -12,6 +12,7 @@
 ## Table of Contents
 
 * [Changelog](#changelog)
+  * [Releases v1.2.2](#releases-v122)
   * [Releases v1.2.1](#releases-v121)
   * [Releases v1.2.0](#releases-v120)
   * [Releases v1.1.1](#releases-v111)
@@ -24,6 +25,11 @@
 
 ## Changelog
 
+### Releases v1.2.2
+
+1. Use `float` for `DutyCycle` and `Freq`, `uint32_t` for `period`. 
+2. Optimize code by not calculation in ISR
+
 ### Releases v1.2.1
 
 1. DutyCycle to be optionally updated at the end current PWM period instead of immediately. Check [DutyCycle to be updated at the end current PWM period #2](https://github.com/khoih-prog/ESP8266_PWM/issues/2)

changelog.md

@@ -123,21 +123,21 @@ uint32_t PWM_Pin[] =
 #endif
 
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period[] =
+uint32_t PWM_Period[] =
 {
-  1000000.0,     500000.0,   333333.333,   250000.0,   200000.0,   166666.666,   142857.143,   125000.0,
-   111111.111,   100000.0,    66666.666,    50000.0,    40000.0,    33333.333,    25000.0,      20000.0
+  1000000,     500000,   333333,   250000,   200000,   166667,   142857,   125000,
+   111111,     100000,    66667,    50000,    40000,    33333,    25000,    20000
 };
 
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq[] =
+float PWM_Freq[] =
 {
   1.0f,  2.0f,  3.0f,  4.0f,  5.0f,  6.0f,  7.0f,  8.0f,
   9.0f, 10.0f, 15.0f, 20.0f, 25.0f, 30.0f, 40.0f, 50.0f
 };
 
 // You can assign any interval for any timer here, in milliseconds
-double PWM_DutyCycle[] =
+float PWM_DutyCycle[] =
 {
    5.00, 10.00, 20.00, 30.00, 40.00, 45.00, 50.00, 55.00,
   60.00, 65.00, 70.00, 75.00, 80.00, 85.00, 90.00, 95.00
@@ -249,7 +249,7 @@ void setup()
   // You can use up to 16 timer for each ISR_PWM
   for (uint16_t i = 0; i < NUMBER_ISR_PWMS; i++)
   {
-    //void setPWM(uint32_t pin, uint32_t frequency, uint32_t dutycycle
+    //void setPWM(uint32_t pin, float frequency, float dutycycle
     // , timer_callback_p StartCallback = nullptr, timer_callback_p StopCallback = nullptr)
 
 #if USING_PWM_FREQUENCY

examples/ISR_16_PWMs_Array/ISR_16_PWMs_Array.ino

@@ -132,21 +132,21 @@ uint32_t PWM_Pin[] =
 #endif
 
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period[] =
+uint32_t PWM_Period[] =
 {
-  1000000.0,     500000.0,   333333.333,   250000.0,   200000.0,   166666.666,   142857.143,   125000.0,
-   111111.111,   100000.0,    66666.666,    50000.0,    40000.0,    33333.333,    25000.0,      20000.0
+  1000000,     500000,   333333,   250000,   200000,   166667,   142857,   125000,
+   111111,     100000,    66667,    50000,    40000,    33333,    25000,    20000
 };
 
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq[] =
+float PWM_Freq[] =
 {
   1.0f,  2.0f,  3.0f,  4.0f,  5.0f,  6.0f,  7.0f,  8.0f,
   9.0f, 10.0f, 15.0f, 20.0f, 25.0f, 30.0f, 40.0f, 50.0f
 };
 
 // You can assign any interval for any timer here, in milliseconds
-double PWM_DutyCycle[] =
+float PWM_DutyCycle[] =
 {
    5.00, 10.00, 20.00, 30.00, 40.00, 45.00, 50.00, 55.00,
   60.00, 65.00, 70.00, 75.00, 80.00, 85.00, 90.00, 95.00

examples/ISR_16_PWMs_Array_Complex/ISR_16_PWMs_Array_Complex.ino

@@ -123,21 +123,21 @@ uint32_t PWM_Pin[] =
 #endif
 
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period[] =
+uint32_t PWM_Period[] =
 {
-  1000000.0,     500000.0,   333333.333,   250000.0,   200000.0,   166666.666,   142857.143,   125000.0,
-   111111.111,   100000.0,    66666.666,    50000.0,    40000.0,    33333.333,    25000.0,      20000.0
+  1000000,     500000,   333333,   250000,   200000,   166667,   142857,   125000,
+   111111,     100000,    66667,    50000,    40000,    33333,    25000,    20000
 };
 
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq[] =
+float PWM_Freq[] =
 {
   1.0f,  2.0f,  3.0f,  4.0f,  5.0f,  6.0f,  7.0f,  8.0f,
   9.0f, 10.0f, 15.0f, 20.0f, 25.0f, 30.0f, 40.0f, 50.0f
 };
 
 // You can assign any interval for any timer here, in milliseconds
-double PWM_DutyCycle[] =
+float PWM_DutyCycle[] =
 {
    5.00, 10.00, 20.00, 30.00, 40.00, 45.00, 50.00, 55.00,
   60.00, 65.00, 70.00, 75.00, 80.00, 85.00, 90.00, 95.00
@@ -170,7 +170,7 @@ void setup()
   for (uint16_t i = 0; i < NUMBER_ISR_PWMS; i++)
   //for (uint16_t i = 0; i < 1; i++)
   {
-    //void setPWM(uint32_t pin, uint32_t frequency, uint32_t dutycycle
+    //void setPWM(uint32_t pin, float frequency, float dutycycle
     // , timer_callback_p StartCallback = nullptr, timer_callback_p StopCallback = nullptr)
 
 #if USING_PWM_FREQUENCY

examples/ISR_16_PWMs_Array_Simple/ISR_16_PWMs_Array_Simple.ino

@@ -69,19 +69,19 @@ bool IRAM_ATTR TimerHandler(void * timerNo)
 uint32_t PWM_Pin    = LED_BUILTIN;
 
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq1   = 1.0f;
+float PWM_Freq1   = 1.0f;
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq2   = 2.0f;
+float PWM_Freq2   = 2.0f;
 
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period1 = 1000000.0 / PWM_Freq1;
+uint32_t PWM_Period1 = 1000000 / PWM_Freq1;
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period2 = 1000000.0 / PWM_Freq2;
+uint32_t PWM_Period2 = 1000000 / PWM_Freq2;
 
 // You can assign any duty_cycle for any PWM here, from 0-100
-double PWM_DutyCycle1  = 50.0;
+float PWM_DutyCycle1  = 50.0;
 // You can assign any duty_cycle for any PWM here, from 0-100
-double PWM_DutyCycle2  = 90.0;
+float PWM_DutyCycle2  = 90.0;
 
 // Channel number used to identify associated channel
 int channelNum;
@@ -135,7 +135,7 @@ void loop()
 
   delay(10000);
 
-  ISR_PWM.deleteChannel((unsigned) channelNum);
+  ISR_PWM.deleteChannel((uint8_t) channelNum);
 
   Serial.print(F("Using PWM Freq = ")); Serial.print(PWM_Freq2); Serial.print(F(", PWM DutyCycle = ")); Serial.println(PWM_DutyCycle2);
 
@@ -156,5 +156,5 @@ void loop()
 
   delay(10000);
 
-  ISR_PWM.deleteChannel((unsigned) channelNum);
+  ISR_PWM.deleteChannel((uint8_t) channelNum);
 }

examples/ISR_Changing_PWM/ISR_Changing_PWM.ino

@@ -70,19 +70,19 @@ bool IRAM_ATTR TimerHandler(void * timerNo)
 uint32_t PWM_Pin    = LED_BUILTIN;
 
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq1   = 1.0f;
+float PWM_Freq1   = 1.0f;
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq2   = 2.0f;
+float PWM_Freq2   = 2.0f;
 
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period1 = 1000000.0 / PWM_Freq1;
+uint32_t PWM_Period1 = 1000000 / PWM_Freq1;
 // You can assign any interval for any timer here, in microseconds
-double PWM_Period2 = 1000000.0 / PWM_Freq2;
+uint32_t PWM_Period2 = 1000000 / PWM_Freq2;
 
 // You can assign any duty_cycle for any PWM here, from 0-100
-double PWM_DutyCycle1  = 10.0;
+float PWM_DutyCycle1  = 10.0;
 // You can assign any duty_cycle for any PWM here, from 0-100
-double PWM_DutyCycle2  = 90.0;
+float PWM_DutyCycle2  = 90.0;
 
 // Channel number used to identify associated channel
 int channelNum;
@@ -111,7 +111,7 @@ void setup()
 
   // Just to demonstrate, don't use too many ISR Timers if not absolutely necessary
   // You can use up to 16 timer for each ISR_PWM
-  //void setPWM(uint32_t pin, uint32_t frequency, uint32_t dutycycle
+  //void setPWM(uint32_t pin, float frequency, float dutycycle
   // , timer_callback_p StartCallback = nullptr, timer_callback_p StopCallback = nullptr)
   Serial.print(F("Using PWM Freq = ")); Serial.print(PWM_Freq1); Serial.print(F(", PWM DutyCycle = ")); Serial.println(PWM_DutyCycle1);
 
@@ -137,8 +137,8 @@ void changePWM()
 {
   static uint8_t count = 1;
 
-  double PWM_Freq;
-  uint32_t PWM_DutyCycle;
+  float PWM_Freq;
+  float PWM_DutyCycle;
 
   if (count++ % 2)
   {

examples/ISR_Modify_PWM/ISR_Modify_PWM.ino

@@ -1,6 +1,6 @@
 {
   "name": "ESP32_PWM",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "keywords": "timing, device, control, pwm, timer, interrupt, hardware, isr, isr-based, hardware-timer, isr-timer, isr-based-timer, mission-critical, accuracy, precise, non-blocking, esp32, esp32-s2, esp32-c3, synchronized-PWM, on-the-fly",
   "description": "This library enables you to use Interrupt from Hardware Timers on an ESP32, ESP32_S2 or ESP32_C3-based board to create and output PWM to pins. It now supports 16 ISR-based synchronized PWM channels, while consuming only 1 Hardware Timer. PWM interval can be very long (uint32_t millisecs). The most important feature is they're ISR-based PWM channels. Therefore, their executions are not blocked by bad-behaving functions or tasks. This important feature is absolutely necessary for mission-critical tasks. These hardware PWM channels, using interrupt, still work even if other functions are blocking. Moreover, they are much more precise (certainly depending on clock frequency accuracy) than other software timers using millis() or micros(). That's necessary if you need to measure some data requiring better accuracy. Now you can change the PWM settings on-the-fly",
   "authors":

library.json

@@ -1,5 +1,5 @@
 name=ESP32_PWM
-version=1.2.1
+version=1.2.2
 author=Khoi Hoang <khoih.prog@gmail.com>
 maintainer=Khoi Hoang <khoih.prog@gmail.com>
 sentence=This library enables you to use Interrupt from Hardware Timers on an ESP32, ESP32_S2 or ESP32_C3-based board to create and output PWM to pins.

library.properties

@@ -21,7 +21,7 @@
   Therefore, their executions are not blocked by bad-behaving functions / tasks.
   This important feature is absolutely necessary for mission-critical tasks.
 
-  Version: 1.2.1
+  Version: 1.2.2
 
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
@@ -31,6 +31,7 @@
   1.1.1   K Hoang      09/11/2021 Fix examples to not use GPIO1/TX0 for core v2.0.1+
   1.2.0   K Hoang      29/01/2022 Fix multiple-definitions linker error. Improve accuracy. Fix bug
   1.2.1   K Hoang      30/01/2022 DutyCycle to be updated at the end current PWM period
+  1.2.2   K Hoang      01/02/2022 Use float for DutyCycle and Freq, uint32_t for period. Optimize code
 *****************************************************************************************************************************/
 
 #pragma once