Ryan Vasquez
This is a library for the PCA9685 ported from the Adafruit Ardiuno library.
Diff: PCA9685Lib.h
- Revision:
- 2:ec40a85eba51
- Parent:
- 1:f1b17f9d387e
--- a/PCA9685Lib.h Fri Feb 13 23:26:00 2015 +0000
+++ b/PCA9685Lib.h Sat Feb 14 19:35:08 2015 +0000
@@ -1,4 +1,150 @@
-/***************************************************
+
+
+
+
+#ifndef _ADAFRUIT_PWMServoDriver_H
+#define _ADAFRUIT_PWMServoDriver_H
+
+#include "mbed.h"
+#include <cmath>
+
+#define PCA9685_SUBADR1 0x2
+#define PCA9685_SUBADR2 0x3
+#define PCA9685_SUBADR3 0x4
+
+#define PCA9685_MODE1 0x0
+#define PCA9685_MODE2 0x1
+#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 PCA9685Lib; //Forward declaration
+
+/*! \struct LEDarr
+ \brief LEDarr is a simple struct that stores the outpin it is,
+ *a pointer to the class it is in, and an overloaded = operator
+ * to make assigning duty cycle easier.
+ A more detailed class description.
+*/
+struct LEDarr {
+
+ uint8_t LEDnum;
+ PCA9685Lib* PCALib;
+ /** Overloaded assignement operator.
+ * Allows the user to more simply assign duty cycle values to a pin.
+ * @param duty unsigned 16 integer as the duty cycle
+ */
+ void operator= (uint16_t duty);
+};
+
+/** My PCA9685Lib class
+* used for controlling the pca9685
+*
+* Example:
+* @code
+* // Change the duty cycle of an led
+*
+* #include "mbed.h"
+* #include "PCA9685Lib.h"
+* I2C i2c(p28, p27);
+* PCA9685Lib LedDriver(i2c);
+* LedDriver.begin();
+* LedDriver.setPWMFreq(1600);
+* int main()
+* {
+* while(1)
+* {
+*
+* for(uint16_t i = 0; i < 16; i++)
+ {
+ for(uint16_t j = 0; j < 4096; j += 8)
+ {
+ LedDriver.LED[i] = j;
+ }
+ }
+ for(uint16_t i = 0; i < 16; i++)
+ {
+ for(uint16_t j = 4095; j > 0; j -= 8)
+ {
+ LedDriver.LED[i] = j;
+ }
+ }
+*
+* }
+* }
+* @endcode
+*/
+
+
+class PCA9685Lib
+{
+public:
+ /** Create an PCA9685Lib instance, pass in an I2C object and the PCA9685 device address
+ * The default address is 0x80
+ * @param i2cobj Pass and instantiated I2C object to the class to communicate with
+ * @param addr pass the device address the constructor (optional)
+ *
+ */
+ PCA9685Lib(I2C i2cobj, int addr = 0x80); //0b 1_000000_(R/W) <- default slave adress
+ /** Seaches for I2C devices
+
+ */
+ void i2c_probe(void);
+ /** Resets the PCA9685 (clears device registers)
+ */
+ void begin(void);
+ /** Sets the I2C frequency.
+ */
+ void setI2Cfreq(int freq);
+ /** Resets the PCA9685 (clears device registers)
+ */
+ void reset(void);
+ /** sets the pwm frequency
+ */
+ void setPWMFreq(float freq);
+ /** Set the prescale registers on the pca9685
+ */
+ void setPrescale(uint8_t prescale);
+ /** Sets the Mode2 to 0x15 (totem pole configuration) by default
+ @param val Mode2 register value
+ */
+ void setMode2(uint8_t val = 0x15);
+ /** Sets the pwm on a specific pin
+ * Each PWM clock cycle is divided in 4096 steps
+ * See datasheet for more details
+ * @param num Output pin number (0-15)
+ * @param on This is speicify at what point in the cycle the output will turn on (0-4095 or 0x000-0xFFF)
+ * @param off This is speicify at what point in the cycle the output will turn off (0-4095 or 0x000-0xFFF)
+ */
+ void setPWM(uint8_t num, uint16_t on, uint16_t off);
+ /** Sets the duty cycle on a specific pin
+ * @param num Output pin number (0-15)
+ * @param duty This is speicify at what point in the cycle the output will turn off (0-4095 or 0x000-0xFFF)
+ */
+ void setDuty(uint8_t num, uint16_t duty);
+
+
+ LEDarr LED[15];
+private:
+ int _i2caddr;
+ I2C i2c;
+ uint8_t read8(char addr);
+ void write8(char addr, char d);
+};
+
+
+#endif
+/*
This is a library for our Adafruit 16-channel PWM & Servo driver
Pick one up today in the adafruit shop!
@@ -17,92 +163,5 @@
/*****************************
This program was ported from https://github.com/adafruit/Adafruit-PWM-Servo-Driver-Library.
- I also added some functions.
- Shundo Kishi
- *****************************/
-#ifndef _ADAFRUIT_PWMServoDriver_H
-#define _ADAFRUIT_PWMServoDriver_H
-
-#include "mbed.h"
-#include <cmath>
-
-#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
-
-
-
- /** An analog input, used for reading the voltage on a pin
- *
- * Example:
- * @code
- * // Print messages when the AnalogIn is greater than 50%
- *
- * #include "mbed.h"
- *
- * AnalogIn temperature(p20);
- *
- * int main() {
- * while(1) {
- * if(temperature > 0.5) {
- * printf("Too hot! (%f)", temperature.read());
- * }
- * }
- * }
- * @endcode
*/
-class PCA9685Lib; //Forward declaration
-struct LEDarr
-{
- /** Create an PCA9685 object, pass in an I2C object and the PCA9685 device address
- * The default address is 0x80
- * @param i2cobj PCA9685Lib pin to connect to
- * @param name (optional) A string to identify the object
- */
- uint8_t LEDnum;
- PCA9685Lib* PCALib;
- void operator= (uint16_t duty);
-};
-
-class PCA9685Lib {
- public:
- /** Create an PCA9685 object, pass in an I2C object and the PCA9685 device address
- * The default address is 0x80
- * @param i2cobj PCA9685Lib pin to connect to
- * @param name (optional) A string to identify the object
- */
- PCA9685Lib(I2C i2cobj, int addr = 0x80); //0b 1_000000_(R/W) <- default slave adress
- void i2c_probe(void);
- void begin(void);
- void setI2Cfreq(int freq);
- void reset(void);
- void setPWMFreq(float freq);
- void setPrescale(uint8_t prescale);
- void setPWM(uint8_t num, uint16_t on, uint16_t off);
- void setDuty(uint8_t num, uint16_t duty);
- void operator[](int i);
- LEDarr LED[15];
- private:
- int _i2caddr;
- I2C i2c;
-
- uint8_t read8(char addr);
- void write8(char addr, char d);
-};
-
-
-#endif