v1.2.0 to fix multiple-definitions linker error

### Releases v1.2.0

1. Fix `multiple-definitions` linker error. Drop `src_cpp` and `src_h` directories
2. Add support to `ESP32_C3`
3. Add example [multiFileProject](examples/multiFileProject) to demo for multiple-file project
4. Improve accuracy by using `double`, instead of `uint32_t` for `dutycycle`, `period`
5. Update examples accordingly

Author: khoih-prog

CONTRIBUTING.md

@@ -14,9 +14,11 @@ If you don't find anything, please [open a new issue](https://github.com/khoih-p
 
 Please ensure to specify the following:
 
-* Arduino IDE version (e.g. 1.8.16) or Platform.io version
-* `ESP32` Core Version (e.g. ESP32 core v2.0.0)
+* Arduino IDE version (e.g. 1.8.19) or Platform.io version
+* `ESP32` Core Version (e.g. ESP32 core v2.0.2)
+* `ESP32` Board type (e.g. ESP32_DEV Module, etc.)
 * `ESP32-S2` Board type (e.g. ESP32S2_DEV Module, ESP32_S2_Saola, etc.)
+* `ESP32-C3` Board type (e.g. ESP32C3_DEV Module, etc.)
 * Contextual information (e.g. what you were trying to achieve)
 * Simplest possible steps to reproduce
 * Anything that might be relevant in your opinion, such as:
@@ -27,11 +29,11 @@ Please ensure to specify the following:
 ### Example
 
 ```
-Arduino IDE version: 1.8.16
-ESP32 core v2.0.0
+Arduino IDE version: 1.8.19
+ESP32 core v2.0.2
 ESP32S2_DEV Module
 OS: Ubuntu 20.04 LTS
-Linux xy-Inspiron-3593 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
+Linux xy-Inspiron-3593 5.4.0-96-generic #109-Ubuntu SMP Wed Jan 12 16:49:16 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
 
 Context:
 I encountered a crash while using TimerInterrupt.

README.md

@@ -12,6 +12,7 @@
 ## Table of Contents
 
 * [Changelog](#changelog)
+  * [Releases v1.2.0](#releases-v120)
   * [Releases v1.1.1](#releases-v111)
   * [Releases v1.1.0](#releases-v110)
   * [Releases v1.0.1](#releases-v101)
@@ -22,6 +23,14 @@
 
 ## Changelog
 
+### Releases v1.2.0
+
+1. Fix `multiple-definitions` linker error. Drop `src_cpp` and `src_h` directories
+2. Add support to `ESP32_C3`
+3. Add example [multiFileProject](examples/multiFileProject) to demo for multiple-file project
+4. Improve accuracy by using `double`, instead of `uint32_t` for `dutycycle`, `period`
+5. Update examples accordingly
+
 ### Releases v1.1.1
 
 1. Fix examples to not use GPIO1/TX0 for core v2.0.1+

changelog.md

@@ -20,10 +20,10 @@
   Therefore, their executions are not blocked by bad-behaving functions / tasks.
   This important feature is absolutely necessary for mission-critical tasks.
 *****************************************************************************************************************************/
+
 #if !defined( ESP32 )
   #error This code is designed to run on ESP32 platform, not Arduino nor ESP8266! Please check your Tools->Board setting.
-#elif ( ARDUINO_ESP32C3_DEV )
-  #error This code is not designed to run on ESP32-C3 platform! Please check your Tools->Board setting.     
+   
 #endif
 
 // These define's must be placed at the beginning before #include "ESP32_PWM.h"
@@ -33,6 +33,7 @@
 
 #define USING_MICROS_RESOLUTION       true    //false 
 
+// To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error
 #include "ESP32_PWM.h"
 
 #ifndef LED_BUILTIN
@@ -66,7 +67,11 @@ bool IRAM_ATTR TimerHandler(void * timerNo)
 
 //////////////////////////////////////////////////////
 
-#define NUMBER_ISR_PWMS         16
+#if ( ARDUINO_ESP32C3_DEV )
+  #define NUMBER_ISR_PWMS         4
+#else
+  #define NUMBER_ISR_PWMS         16
+#endif
 
 #define PIN_D0            0         // Pin D0 mapped to pin GPIO0/BOOT/ADC11/TOUCH1 of ESP32
 #define PIN_D1            1         // Pin D1 mapped to pin GPIO1/TX0 of ESP32
@@ -99,32 +104,40 @@ bool IRAM_ATTR TimerHandler(void * timerNo)
 
 // You can assign pins here. Be carefull to select good pin to use or crash, e.g pin 6-11
 // Can't use PIN_D1 for core v2.0.1+
-uint32_t PWM_Pin[NUMBER_ISR_PWMS] =
+
+#if ( ARDUINO_ESP32C3_DEV )
+uint32_t PWM_Pin[] =
+// Bad pins to use: PIN_D12-PIN_D24
+{
+  LED_BUILTIN, PIN_D3,  PIN_D4,  PIN_D5
+};
+#else
+uint32_t PWM_Pin[] =
 {
   PIN_D24, LED_BUILTIN,  PIN_D3,  PIN_D4,  PIN_D5,  PIN_D12, PIN_D13, PIN_D14,
   PIN_D15, PIN_D16,      PIN_D17, PIN_D18, PIN_D19, PIN_D21, PIN_D22, PIN_D23
 };
+#endif
 
 // You can assign any interval for any timer here, in microseconds
-uint32_t PWM_Period[NUMBER_ISR_PWMS] =
+double PWM_Period[] =
 {
-  1000000L,   500000L,   333333L,   250000L,   200000L,   166667L,   142857L,   125000L,
-   111111L,   100000L,    66667L,    50000L,    40000L,   33333L,     25000L,    20000L
+  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
 };
 
 // You can assign any interval for any timer here, in Hz
-double PWM_Freq[NUMBER_ISR_PWMS] =
+double 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
-uint32_t PWM_DutyCycle[NUMBER_ISR_PWMS] =
+double PWM_DutyCycle[] =
 {
-   5, 10, 20, 30, 40, 45, 50, 55,
-  60, 65, 70, 75, 80, 85, 90, 95
+   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
 };
 
 typedef void (*irqCallback)  ();
@@ -197,7 +210,7 @@ void doingSomething15()
 {
 }
 
-irqCallback irqCallbackStartFunc[NUMBER_ISR_PWMS] =
+irqCallback irqCallbackStartFunc[] =
 {
   doingSomething0,  doingSomething1,  doingSomething2,  doingSomething3, 
   doingSomething4,  doingSomething5,  doingSomething6,  doingSomething7,