microbit fork
Dependents: demoMicroBit_PCA9685
Fork of PCA9685PWM by
Diff: PCA9685.h
- Revision:
- 2:429b0b439bc1
- Parent:
- 1:7f3c3ac6b20b
diff -r 7f3c3ac6b20b -r 429b0b439bc1 PCA9685.h --- a/PCA9685.h Fri Jul 24 09:03:58 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,109 +0,0 @@ -/**Library for PCA9685 16-channel, 12-bit PWM Fm+ I²C-bus LED controller -* Example code -* @code -* -*#include"PCA9685.h" -*#include"mbed.h" -* -* -* -*PCA9685 pwm(D14,D15); -* -*void setServoPulse(uint8_t n, float pulse) { -* float pulselength = 10000; // 10,000 units per seconds -* pulse = 4094 * pulse / pulselength; -* pwm.setPWM(n, 0, pulse); -*} -* -*void initServoDriver() { -* pwm.begin(); -* pwm.setPrescale(64); //This value is decided for 10ms interval. -* pwm.frequencyI2C(400000); //400kHz -*} -* -* int main() { -* -* while(1){ -* initServoDriver(); -* wait(0.2); -* setServoPulse(0, 2300); -* setServoPulse(1, 500); -* wait(0.5);//delay necessary to perform the action -* setServoPulse(0, 1350); -* setServoPulse(1, 1350); -* wait(0.5); -* setServoPulse(0,550); -* setServoPulse(1, 2250); -* wait(0.5); -* setServoPulse(0, 2300); -* wait(2); -* for (int mov = 550; mov < 2300; mov++){ -* setServoPulse(0, mov); -* wait(0.001); -* } -* for (int mov = 500; mov < 2200; mov++){ -* setServoPulse(1, mov); -* wait(0.001); -* } -* } -*} -*@endcode -* -*/ -#ifndef PCA9685_H -#define PCA9685_H - -#include "mbed.h" -#include <cmath> -//register definitions -#define PCA9685_SUBADR1 0x2 -#define PCA9685_SUBADR2 0x3 -#define PCA9685_SUBADR3 0x4 - -#define PCA9685_MODE1 0x0 -#define PCA9685_PRESCALE 0xFE - -#define LED0_ON_L 0x6 -#define LED0_ON_H 0x7 -#define LED0_OFF_L 0x8 -#define LED0_OFF_H 0x9 - -#define ALLLED_ON_L 0xFA -#define ALLLED_ON_H 0xFB -#define ALLLED_OFF_L 0xFC -#define ALLLED_OFF_H 0xFD - - -class PCA9685 -{ -public: - PCA9685(PinName sda, PinName scl, int addr = 0x80); - void frequencyI2C(int freq); - void begin(void); //Initialize the controller - void reset(void); //Reset the controller - void setPrescale(uint8_t prescale);//setPrescale(prescale) - /** Set prescale - * - * @param prescale: set scale for the PWM frequency - * - */ - void setPWMFreq(float freq);//Set the pwm frequency - /** Set frequency - * - * @param frequency in Hz - * - */ - void setPWM(uint8_t num, uint16_t on, uint16_t off);//SetPWM(channel, on, off) - /** Set the start (on) and the end (off) of the part of the PWM pulse of the channel - * @param channel : from 0 to 15 the channel the should be update - * @param on: from 0 to 4095 the tick when the signal should pass from low to high - * @param off: from 0 to 4095 the tick when the signal should pass from high to low - */ -private: - void write8(uint8_t address, uint8_t data); - char read8(char address); - int _i2caddr; - I2C i2c; -}; - -#endif \ No newline at end of file