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### Releases v1.2.0 1. Add efficient `setPWM_manual()` function to use in wafeform creation using PWM. Check [Duty cycle as integer rather than float #6](#6) 2. Add example [PWM_Waveform](https://github.com/khoih-prog/RP2040_PWM/tree/main/examples/PWM_Waveform) to demonstrate how to use new `setPWM_manual()` function in wafeform creation 3. Optimize library code and examples by using **reference-passing instead of value-passing**.
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,130 @@ | ||
| /**************************************************************************************************************************** | ||
| PWM_Waveform.ino | ||
| For RP2040 boards | ||
| Written by Khoi Hoang | ||
| Built by Khoi Hoang https://github.com/khoih-prog/RP2040_PWM | ||
| Licensed under MIT license | ||
| The RP2040 PWM block has 8 identical slices. Each slice can drive two PWM output signals, or measure the frequency | ||
| or duty cycle of an input signal. This gives a total of up to 16 controllable PWM outputs. All 30 GPIO pins can be driven | ||
| by the PWM block | ||
| *****************************************************************************************************************************/ | ||
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| // This example to demo the new function setPWM_manual(uint8_t pin, uint16_t top, uint8_t div, uint16_t level, bool phaseCorrect = false) | ||
| // used to generate a waveform. Check https://github.com/khoih-prog/RP2040_PWM/issues/6 | ||
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| #define _PWM_LOGLEVEL_ 2 | ||
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| #if ( defined(ARDUINO_NANO_RP2040_CONNECT) || defined(ARDUINO_RASPBERRY_PI_PICO) || defined(ARDUINO_ADAFRUIT_FEATHER_RP2040) || \ | ||
| defined(ARDUINO_GENERIC_RP2040) ) && defined(ARDUINO_ARCH_MBED) | ||
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| #if(_PWM_LOGLEVEL_>3) | ||
| #warning USING_MBED_RP2040_PWM | ||
| #endif | ||
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| #elif ( defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_RASPBERRY_PI_PICO) || defined(ARDUINO_ADAFRUIT_FEATHER_RP2040) || \ | ||
| defined(ARDUINO_GENERIC_RP2040) ) && !defined(ARDUINO_ARCH_MBED) | ||
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| #if(_PWM_LOGLEVEL_>3) | ||
| #warning USING_RP2040_PWM | ||
| #endif | ||
| #else | ||
| #error This code is intended to run on the RP2040 mbed_nano, mbed_rp2040 or arduino-pico platform! Please check your Tools->Board setting. | ||
| #endif | ||
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| #include "RP2040_PWM.h" | ||
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| #define LED_ON LOW | ||
| #define LED_OFF HIGH | ||
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| #define pinLed 25 // GP25, On-board BUILTIN_LED | ||
| #define pin0 16 // GP16, PWM channel 4B (D2) | ||
| #define pin10 10 // PWM channel 5A | ||
| #define pin11 11 // PWM channel 5B | ||
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| #define pinToUse pin10 | ||
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| RP2040_PWM* PWM_Instance; | ||
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| typedef struct | ||
| { | ||
| uint16_t top; | ||
| uint8_t div; | ||
| uint16_t level; | ||
| } PWD_Data; | ||
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| #define NUM_PWM_POINTS 12 | ||
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| // PWM Freq = 12487 Hz | ||
| PWD_Data PWM_data[NUM_PWM_POINTS] = | ||
| { | ||
| { 1000, 10, 0 }, | ||
| { 1000, 10, 50 }, | ||
| { 1000, 10, 100 }, | ||
| { 1000, 10, 200 }, | ||
| { 1000, 10, 300 }, | ||
| { 1000, 10, 400 }, | ||
| { 1000, 10, 500 }, | ||
| { 1000, 10, 600 }, | ||
| { 1000, 10, 700 }, | ||
| { 1000, 10, 800 }, | ||
| { 1000, 10, 900 }, | ||
| { 1000, 10, 1000 }, | ||
| }; | ||
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| float frequency; | ||
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| // You can select any value | ||
| PWD_Data PWM_data_idle = PWM_data[0]; | ||
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| char dashLine[] = "============================================================="; | ||
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| void setup() | ||
| { | ||
| Serial.begin(115200); | ||
| while (!Serial && millis() < 5000); | ||
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| delay(100); | ||
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| Serial.print(F("\nStarting PWM_Waveform on ")); Serial.println(BOARD_NAME); | ||
| Serial.println(RP2040_PWM_VERSION); | ||
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| frequency = 1000; | ||
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| // Create a dummy instance | ||
| PWM_Instance = new RP2040_PWM(pinToUse, frequency, 0); | ||
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| if (PWM_Instance) | ||
| { | ||
| // setPWM_manual(uint8_t pin, uint16_t top, uint8_t div, uint16_t level, bool phaseCorrect = false) | ||
| PWM_Instance->setPWM_manual(pinToUse, PWM_data_idle.top, PWM_data_idle.div, PWM_data_idle.level, true); | ||
| } | ||
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| Serial.println(dashLine); | ||
| } | ||
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| void printPWMInfo(RP2040_PWM* PWM_Instance) | ||
| { | ||
| uint32_t div = PWM_Instance->get_DIV(); | ||
| uint32_t top = PWM_Instance->get_TOP(); | ||
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| // PWM_Freq = ( F_CPU ) / [ ( TOP + 1 ) * ( DIV + DIV_FRAC/16) ] | ||
| PWM_LOGINFO1("Actual PWM Frequency = ", PWM_Instance->get_freq_CPU() / ( (PWM_Instance->get_TOP() + 1) * (PWM_Instance->get_DIV() ) ) ); | ||
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| PWM_LOGDEBUG5("TOP =", top, ", DIV =", div, ", CPU_freq =", PWM_Instance->get_freq_CPU()); | ||
| } | ||
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| void loop() | ||
| { | ||
| for (int index = 0; index < NUM_PWM_POINTS; index++) | ||
| { | ||
| PWM_Instance->setPWM_manual(pinToUse, PWM_data[index].top, PWM_data[index].div, PWM_data[index].level, true); | ||
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| // Use at low freq to check | ||
| //printPWMInfo(PWM_Instance); | ||
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| // delay something here between data | ||
| delay(100); | ||
| } | ||
| } |
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