b82d92e373
This patch adds an example for I2C callbacks that is very similar to the i2c-LSM9DS0 example except that it uses a PWM device that is built into the platform.
94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*
|
|
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "contiki.h"
|
|
#include "sys/ctimer.h"
|
|
|
|
#include "i2c.h"
|
|
|
|
#define PWM_PCA9685_0_I2C_ADDR 0x47
|
|
#define MODE1_ADDR 0x00
|
|
|
|
static uint8_t tx_data = MODE1_ADDR;
|
|
static uint8_t rx_data = 0;
|
|
static struct ctimer timer;
|
|
|
|
PROCESS(i2c_callbacks_process, "I2C Callbacks Example Process");
|
|
AUTOSTART_PROCESSES(&i2c_callbacks_process);
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
rx(void)
|
|
{
|
|
/* The value below is programmed into this register in pwm_pca9685_init(). */
|
|
printf("%s expected value: %x\n",
|
|
(rx_data == (1 << 5)) ? "Received" : "Did not receive",
|
|
(unsigned)rx_data);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
tx(void)
|
|
{
|
|
rx_data = 0;
|
|
|
|
quarkX1000_i2c_read(&rx_data, sizeof(rx_data), PWM_PCA9685_0_I2C_ADDR);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
err(void)
|
|
{
|
|
printf("Something went wrong. err() callback has been called.\n");
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
timeout(void *data)
|
|
{
|
|
quarkX1000_i2c_write(&tx_data, sizeof(tx_data), PWM_PCA9685_0_I2C_ADDR);
|
|
|
|
ctimer_reset(&timer);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(i2c_callbacks_process, ev, data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
|
|
quarkX1000_i2c_set_callbacks(rx, tx, err);
|
|
|
|
ctimer_set(&timer, CLOCK_SECOND * 5, timeout, NULL);
|
|
|
|
printf("I2C callbacks example is running\n");
|
|
|
|
PROCESS_YIELD();
|
|
|
|
PROCESS_END();
|
|
}
|