atsam/i2c/atsam_i2c_init.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (c) 2016 embedded brains GmbH & Co. KG
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #include <bsp/atsam-i2c.h>
0029 #include <bsp/i2c.h>
0030
0031 /** TWI0 data pin */
0032 #define PIN_TWI_TWD0 {PIO_PA3A_TWD0, PIOA, ID_PIOA, PIO_PERIPH_A, PIO_DEFAULT}
0033 /** TWI0 clock pin */
0034 #define PIN_TWI_TWCK0 {PIO_PA4A_TWCK0, PIOA, ID_PIOA, PIO_PERIPH_A, PIO_DEFAULT}
0035
0036 /** TWI1 data pin */
0037 #define PIN_TWI_TWD1 {PIO_PB4A_TWD1, PIOB, ID_PIOB, PIO_PERIPH_A, PIO_DEFAULT}
0038 /** TWI1 clock pin */
0039 #define PIN_TWI_TWCK1 {PIO_PB5A_TWCK1, PIOB, ID_PIOB, PIO_PERIPH_A, PIO_DEFAULT}
0040
0041 /** TWI2 data pin */
0042 #define PIN_TWI_TWD2 {PIO_PD27C_TWD2, PIOD, ID_PIOD, PIO_PERIPH_C, PIO_DEFAULT}
0043 /** TWI2 clock pin */
0044 #define PIN_TWI_TWCK2 {PIO_PD28C_TWCK2, PIOD, ID_PIOD, PIO_PERIPH_C, PIO_DEFAULT}
0045
0046 int atsam_register_i2c_0(void)
0047 {
0048     static const Pin pins[] = {PIN_TWI_TWD0, PIN_TWI_TWCK0};
0049
0050     return i2c_bus_register_atsam(
0051         ATSAM_I2C_0_BUS_PATH,
0052         TWIHS0,
0053         ID_TWIHS0,
0054         pins);
0055 }
0056
0057 int atsam_register_i2c_1(void)
0058 {
0059     static const Pin pins[] = {PIN_TWI_TWD1, PIN_TWI_TWCK1};
0060
0061     return i2c_bus_register_atsam(
0062         ATSAM_I2C_1_BUS_PATH,
0063         TWIHS1,
0064         ID_TWIHS1,
0065         pins);
0066 }
0067
0068 int atsam_register_i2c_2(void)
0069 {
0070     static const Pin pins[] = {PIN_TWI_TWD2, PIN_TWI_TWCK2};
0071
0072     return i2c_bus_register_atsam(
0073         ATSAM_I2C_2_BUS_PATH,
0074         TWIHS2,
0075         ID_TWIHS2,
0076         pins);
0077 }