Chris Styles
/
EA_PCA9532_HelloWorld
Simple Hello World for the PCA9532 on the Embedded Artists Baseboard
Diff: PCA9532.h
- Revision:
- 1:bd3f6bfeebac
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PCA9532.h Fri May 07 12:40:00 2010 +0000 @@ -0,0 +1,98 @@ +/* mbed PCF9532 LED Driver Library + * + * Copyright (c) 2010, cstyles (http://mbed.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#ifndef PCA9532_H +#define PCA9532_H + +#include "mbed.h" + +/* + * register names + */ + +#define PCA9532_REG_INPUT0 0 +#define PCA9532_REG_INPUT1 1 +#define PCA9532_REG_PSC0 2 +#define PCA9532_REG_PWM0 3 +#define PCA9532_REG_PSC1 4 +#define PCA9532_REG_PWM1 5 +#define PCA9532_REG_LS0 6 +#define PCA9532_REG_LS1 7 +#define PCA9532_REG_LS2 8 +#define PCA9532_REG_LS3 9 + +/* + LED modes + */ + +#define MODE_OFF 0 +#define MODE_ON 1 +#define MODE_PWM0 2 +#define MODE_PWM1 3 + +class PCA9532 { + +public: + + /* + * Constructor + * Pass the I2C pins being used, and the address + * The address bottom bit will be replaced by R/W bit + */ + PCA9532(PinName sda, PinName scl, int addr); + + /* + * SetLed(int led, int mode) + * Set the LED (0-15) into the specified mode (0-3) (OFF, On, PWM0, PWM1) + */ + int SetLed (int led, int mode); + + /* + * SetMode(int mask, int mode) + * Set the LED specified in the mask to the given mode + */ + int SetMode (int mask, int mode); + + /* + * SetDuty(int channel, float duty) + * Set the duty cycle (0.0-1.0) of the specified PWM channel (0|1) + */ + int Duty (int channel, float duty); + + /* + * SetPeriod(int channel, float duty) + * Set the period (0.0-1.0) of the specified PWM channel (0|1) + */ + int Period (int channel, float period); + +protected: + + void _write(int reg, int data); + int _read(int reg); + int _addr; + I2C _i2c; + +}; + + +#endif