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main.c 7.13 KiB
/**
* @file main.c
* @brief I2C Loopback Example
* @details This example uses the I2C Master to read/write from/to the I2C Slave. For
* this example you must connect P0.6 to P0.14 (SDA) and P0.7 to P0.15 (SCL). The Master
* will use P0.6 and P0.7. The Slave will use P0.14 and P0.15. You must also
* connect the pull-up jumpers (JP23 and JP24) to the proper I/O voltage.
* Refer to JP27 to determine the I/O voltage.
* @note Other devices on the EvKit will be using the same bus. This example cannot be combined with
* a PMIC or bluetooth example because the I2C Slave uses GPIO pins for those devices.
*/
/*******************************************************************************
* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
*
* 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 MAXIM INTEGRATED 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.
*
* Except as contained in this notice, the name of Maxim Integrated
* Products, Inc. shall not be used except as stated in the Maxim Integrated
* Products, Inc. Branding Policy.
*
* The mere transfer of this software does not imply any licenses
* of trade secrets, proprietary technology, copyrights, patents,
* trademarks, maskwork rights, or any other form of intellectual
* property whatsoever. Maxim Integrated Products, Inc. retains all
* ownership rights.
*
* $Date: 2019-02-26 15:50:33 -0600 (Tue, 26 Feb 2019) $
* $Revision: 41252 $
*
******************************************************************************/
/***** Includes *****/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "mxc_config.h"
#include "pb.h"
#include "i2c.h"
/***** Definitions *****/
#define I2C_MASTER MXC_I2C0_BUS0
#define I2C_SLAVE MXC_I2C1_BUS0
#define I2C_SLAVE_ADDR (0x51<<1)
/***** Globals *****/
static uint8_t txdata[16];
static uint8_t rxdata[16];
volatile int i2c_flag;
volatile int i2c_flag1;
volatile int buttonPressed;