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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. 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](khoih-prog/ESP8266_PWM#2) 3. Add examples [SAMD21 multiFileProject](examples/SAMD21/multiFileProject) and [SAMD51 multiFileProject](examples/SAMD51/multiFileProject)to demo for multiple-file project 4. Improve accuracy by using `double`, instead of `uint32_t` for `dutycycle`, `period`. Check [Change Duty Cycle #1](khoih-prog/ESP8266_PWM#1 (comment)) 5. Optimize library code by using `reference-passing` instead of `value-passing` 6. Add support to many more boards, such as `SAMD21E1xA`, `SAMD21G1xA` and`SAMD21J1xA` 7. Update examples accordingly 8. Update `Packages' Patches`
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| /**************************************************************************************************************************** | ||
| ISR_4_PWMs_Array.ino | ||
| For SAMD21/SAMD51 boards | ||
| Written by Khoi Hoang | ||
| Built by Khoi Hoang https://github.com/khoih-prog/SAMD_Slow_PWM | ||
| Licensed under MIT license | ||
| Now even you use all these new 16 ISR-based timers,with their maximum interval practically unlimited (limited only by | ||
| unsigned long miliseconds), you just consume only one SAMD timer and avoid conflicting with other cores' tasks. | ||
| The accuracy is nearly perfect compared to software timers. The most important feature is they're ISR-based timers | ||
| Therefore, their executions are not blocked by bad-behaving functions / tasks. | ||
| This important feature is absolutely necessary for mission-critical tasks. | ||
| *****************************************************************************************************************************/ | ||
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| #if !( defined(ARDUINO_SAMD_ZERO) || defined(ARDUINO_SAMD_MKR1000) || defined(ARDUINO_SAMD_MKRWIFI1010) \ | ||
| || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_SAMD_MKRFox1200) || defined(ARDUINO_SAMD_MKRWAN1300) || defined(ARDUINO_SAMD_MKRWAN1310) \ | ||
| || defined(ARDUINO_SAMD_MKRGSM1400) || defined(ARDUINO_SAMD_MKRNB1500) || defined(ARDUINO_SAMD_MKRVIDOR4000) || defined(__SAMD21G18A__) \ | ||
| || defined(ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS) || defined(__SAMD21G18A__) ) | ||
| #error This code is designed to run on SAMD21 platform! Please check your Tools->Board setting. | ||
| #endif | ||
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| // These define's must be placed at the beginning before #include "SAMD_Slow_PWM.h" | ||
| // _PWM_LOGLEVEL_ from 0 to 4 | ||
| // Don't define _PWM_LOGLEVEL_ > 0. Only for special ISR debugging only. Can hang the system. | ||
| #define _PWM_LOGLEVEL_ 4 | ||
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| #define USING_MICROS_RESOLUTION true //false | ||
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| // Default is true, uncomment to false | ||
| //#define CHANGING_PWM_END_OF_CYCLE false | ||
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| #define MAX_SAMD_PWM_FREQ 1000 | ||
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| // To be included only in main(), .ino with setup() to avoid `Multiple Definitions` Linker Error | ||
| #include "SAMD_Slow_PWM.h" | ||
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| #define LED_OFF LOW | ||
| #define LED_ON HIGH | ||
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| #ifndef LED_BUILTIN | ||
| #define LED_BUILTIN 13 | ||
| #endif | ||
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| // Use 50uS for slow SAMD21 | ||
| #define HW_TIMER_INTERVAL_US 50L | ||
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| uint64_t startMicros = 0; | ||
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| // Init SAMD timer TIMER_TC3 | ||
| SAMDTimer ITimer(TIMER_TC3); | ||
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| // Init SAMD timer TIMER_TCC | ||
| //SAMDTimer ITimer(TIMER_TCC); | ||
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| // Init SAMD_Slow_PWM | ||
| SAMD_Slow_PWM ISR_PWM; | ||
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| ////////////////////////////////////////////////////// | ||
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| void TimerHandler() | ||
| { | ||
| ISR_PWM.run(); | ||
| } | ||
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| ////////////////////////////////////////////////////// | ||
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| // Use max 4 for slow SAMD21 | ||
| #define NUMBER_ISR_PWMS 4 | ||
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| #define PIN_D2 2 | ||
| #define PIN_D7 7 | ||
| #define PIN_D8 8 | ||
| #define PIN_D9 9 | ||
| #define PIN_D10 10 | ||
| #define PIN_D11 11 | ||
| #define PIN_D12 12 | ||
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| ////////////////////////////////////////////////////// | ||
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| #define USING_PWM_FREQUENCY true | ||
|
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| ////////////////////////////////////////////////////// | ||
|
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| // You can assign pins here. Be carefull to select good pin to use or crash, e.g pin 6-11 | ||
| uint32_t PWM_Pin[] = | ||
| { | ||
| LED_BUILTIN, PIN_D2, PIN_D7, PIN_D8 | ||
| }; | ||
|
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||
| // You can assign any interval for any timer here, in microseconds | ||
| double PWM_Period[] = | ||
| { | ||
| 1000000.0, 500000.0, 333333.333, 50000.0 | ||
| }; | ||
|
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| // You can assign any interval for any timer here, in Hz | ||
| double PWM_Freq[] = | ||
| { | ||
| 1.0, 2.0, 3.0, 4.0 | ||
| }; | ||
|
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| // You can assign any interval for any timer here, in milliseconds | ||
| double PWM_DutyCycle[] = | ||
| { | ||
| 40.00, 45.00, 50.00, 55.00 | ||
| }; | ||
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| typedef void (*irqCallback) (); | ||
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| // In SAMD, avoid doing something fancy in ISR, for example complex Serial.print with String() argument | ||
| // The pure simple Serial.prints here are just for demonstration and testing. Must be eliminate in working environment | ||
| // Or you can get this run-time error / crash | ||
| void doingSomething0() | ||
| { | ||
| } | ||
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| void doingSomething1() | ||
| { | ||
| } | ||
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| void doingSomething2() | ||
| { | ||
| } | ||
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| void doingSomething3() | ||
| { | ||
| } | ||
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| irqCallback irqCallbackStartFunc[] = | ||
| { | ||
| doingSomething0, doingSomething1, doingSomething2, doingSomething3 | ||
| }; | ||
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| //////////////////////////////////////////////// | ||
|
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| void setup() | ||
| { | ||
| Serial.begin(115200); | ||
| while (!Serial); | ||
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| delay(2000); | ||
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| Serial.print(F("\nStarting ISR_4_PWMs_Array on ")); Serial.println(BOARD_NAME); | ||
| Serial.println(SAMD_SLOW_PWM_VERSION); | ||
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| // Interval in microsecs | ||
| if (ITimer.attachInterruptInterval(HW_TIMER_INTERVAL_US, TimerHandler)) | ||
| { | ||
| startMicros = micros(); | ||
| Serial.print(F("Starting ITimer OK, micros() = ")); Serial.println(startMicros); | ||
| } | ||
| else | ||
| Serial.println(F("Can't set ITimer. Select another freq. or timer")); | ||
|
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| #if 1 | ||
| // 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 | ||
| for (uint16_t i = 0; i < NUMBER_ISR_PWMS; i++) | ||
| { | ||
| //void setPWM(uint32_t pin, uint32_t frequency, uint32_t dutycycle | ||
| // , timer_callback_p StartCallback = nullptr, timer_callback_p StopCallback = nullptr) | ||
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| #if USING_PWM_FREQUENCY | ||
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| // You can use this with PWM_Freq in Hz | ||
| ISR_PWM.setPWM(PWM_Pin[i], PWM_Freq[i], PWM_DutyCycle[i], irqCallbackStartFunc[i]); | ||
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| #else | ||
| #if USING_MICROS_RESOLUTION | ||
| // Or using period in microsecs resolution | ||
| ISR_PWM.setPWM_Period(PWM_Pin[i], PWM_Period[i], PWM_DutyCycle[i], irqCallbackStartFunc[i]); | ||
| #else | ||
| // Or using period in millisecs resolution | ||
| ISR_PWM.setPWM_Period(PWM_Pin[i], PWM_Period[i] / 1000, PWM_DutyCycle[i], irqCallbackStartFunc[i]); | ||
| #endif | ||
| #endif | ||
| } | ||
| #endif | ||
| } | ||
|
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||
| void loop() | ||
| { | ||
| } |
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