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v1.0.1 to add
PWM_StepperControl example
### Releases v1.0.1 1. Add example [PWM_StepperControl](https://github.com/khoih-prog/nRF52_PWM/tree/main/examples/PWM_StepperControl) to demo how to control Stepper Motor using PWM
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| /**************************************************************************************************************************** | ||
| PWM_StepperControl.ino | ||
| For nRF52-based boards usinghardware-based PWM with Adafruit_nRF52_Arduino core | ||
| Written by Khoi Hoang | ||
| Built by Khoi Hoang https://github.com/khoih-prog/nRF52_PWM | ||
| Licensed under MIT license | ||
| Credits of Paul van Dinther (https://github.com/dinther). Check https://github.com/khoih-prog/RP2040_PWM/issues/16 | ||
| *****************************************************************************************************************************/ | ||
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| // Use with Stepper-Motor driver, such as TMC2209 | ||
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| #define _PWM_LOGLEVEL_ 4 | ||
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| // Select false to use PWM | ||
| #define USING_TIMER false //true | ||
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| #include "nRF52_PWM.h" | ||
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| // OK for Feather_nRF52840_Express (5, 6, 9-13, 14-21/A0-A7, etc.) | ||
| // OK for ItsyBitsy_nRF52840_Express (5, 7, 9-13, 14-20/A0-A6, etc.) | ||
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| #define STEP_PIN 5 | ||
| #define DIR_PIN 9 | ||
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| nRF52_PWM* stepper; | ||
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| void setSpeed(int speed) | ||
| { | ||
| if (speed == 0) | ||
| { | ||
| // Use DC = 0 to stop stepper | ||
| stepper->setPWM(STEP_PIN, 500, 0); | ||
| } | ||
| else | ||
| { | ||
| // Set the frequency of the PWM output and a duty cycle of 50% | ||
| digitalWrite(DIR_PIN, (speed < 0)); | ||
| stepper->setPWM(STEP_PIN, abs(speed), 50); | ||
| } | ||
| } | ||
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| void setup() | ||
| { | ||
| pinMode(DIR_PIN, OUTPUT); | ||
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| Serial.begin(115200); | ||
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| while (!Serial && millis() < 5000); | ||
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| delay(100); | ||
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| Serial.print(F("\nStarting PWM_StepperControl on ")); | ||
| Serial.println(BOARD_NAME); | ||
| Serial.println(NRF52_PWM_VERSION); | ||
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| // Create PWM object and passed just a random frequency of 500 | ||
| // The duty cycle is how you turn the motor on and off | ||
| stepper = new nRF52_PWM(STEP_PIN, 500, 0); | ||
| } | ||
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| void loop() | ||
| { | ||
| setSpeed(1000); | ||
| delay(3000); | ||
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| // Stop before reversing | ||
| setSpeed(0); | ||
| delay(3000); | ||
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| // Reversing | ||
| setSpeed(-500); | ||
| delay(3000); | ||
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| // Stop before reversing | ||
| setSpeed(0); | ||
| delay(3000); | ||
| } |
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