172 lines
5.3 KiB
C
172 lines
5.3 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Device drivers for tlc5916 led driver in Zolertia Z1.
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* \author
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* Jelmer Tiete, VUB <jelmer@tiete.be>
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*/
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#include <stdio.h>
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#include "contiki.h"
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#include "tlc59116.h"
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#include "i2cmaster.h"
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/*---------------------------------------------------------------------------*/
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/* Write to a register.
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args:
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reg register to write to
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val value to write
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*/
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void
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tlc59116_write_reg(uint8_t reg, uint8_t val) {
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uint8_t tx_buf[] = {reg, val};
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i2c_transmitinit(TLC59116_ADDR);
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while (i2c_busy());
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PRINTFDEBUG("I2C Ready to TX\n");
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i2c_transmit_n(2, tx_buf);
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while (i2c_busy());
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PRINTFDEBUG("WRITE_REG 0x%02X @ reg 0x%02X\n", val, reg);
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}
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/*---------------------------------------------------------------------------*/
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/* Write several registers from a stream.
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args:
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len number of bytes to read
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data pointer to where the data is read from
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First byte in stream must be the register address to begin writing to.
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The data is then written from second byte and increasing. */
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void
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tlc59116_write_stream(uint8_t len, uint8_t *data) {
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i2c_transmitinit(TLC59116_ADDR);
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while (i2c_busy());
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PRINTFDEBUG("I2C Ready to TX(stream)\n");
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i2c_transmit_n(len, data); // start tx and send conf reg
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while (i2c_busy());
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PRINTFDEBUG("WRITE_STR %u B to 0x%02X\n", len, data[0]);
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}
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/*---------------------------------------------------------------------------*/
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/* Read one register.
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args:
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reg what register to read
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returns the value of the read register
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*/
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uint8_t
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tlc59116_read_reg(uint8_t reg) {
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uint8_t retVal = 0;
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uint8_t rtx = reg;
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PRINTFDEBUG("READ_REG 0x%02X\n", reg);
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/* transmit the register to read */
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i2c_transmitinit(TLC59116_ADDR);
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while (i2c_busy());
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i2c_transmit_n(1, &rtx);
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while (i2c_busy());
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/* receive the data */
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i2c_receiveinit(TLC59116_ADDR);
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while (i2c_busy());
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i2c_receive_n(1, &retVal);
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while (i2c_busy());
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return retVal;
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}
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/*---------------------------------------------------------------------------*/
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/* Read several registers in a stream.
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args:
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reg what register to start reading from
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len number of bytes to read
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whereto pointer to where the data is saved
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*/
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void
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tlc59116_read_stream(uint8_t reg, uint8_t len, uint8_t *whereto) {
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uint8_t rtx = reg;
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PRINTFDEBUG("READ_STR %u B from 0x%02X\n", len, reg);
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/* transmit the register to start reading from */
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i2c_transmitinit(TLC59116_ADDR);
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while (i2c_busy());
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i2c_transmit_n(1, &rtx);
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while (i2c_busy());
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/* receive the data */
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i2c_receiveinit(TLC59116_ADDR);
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while (i2c_busy());
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i2c_receive_n(len, whereto);
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while (i2c_busy());
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}
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/*---------------------------------------------------------------------------*/
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/* Set pwm value for individual led
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*/
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void
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tlc59116_led(uint8_t led, uint8_t pwm) {
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if (led<1 | led>16) {
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PRINTFDEBUG("TLC59116: wrong led value.");
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}
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tlc59116_write_reg(led, pwm);
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}
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/*---------------------------------------------------------------------------*/
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/* Init the led driver: ports, pins, registers, interrupts (none enabled), I2C,
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default threshold values etc. */
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void
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tlc59116_init(void) {
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/* Set up ports and pins for I2C communication */
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i2c_enable();
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/* set default register values. */
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tlc59116_write_reg(TLC59116_MODE1, TLC59116_MODE1_DEFAULT);
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tlc59116_write_reg(TLC59116_MODE2, TLC59116_MODE2_DEFAULT);
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/* set all leds to PWM control */
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tlc59116_write_reg(TLC59116_LEDOUT0,TLC59116_LEDOUT_PWM);
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tlc59116_write_reg(TLC59116_LEDOUT1,TLC59116_LEDOUT_PWM);
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tlc59116_write_reg(TLC59116_LEDOUT2,TLC59116_LEDOUT_PWM);
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tlc59116_write_reg(TLC59116_LEDOUT3,TLC59116_LEDOUT_PWM);
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}
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