84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*!
|
|
\file i2c.c
|
|
\brief I2C configuration file
|
|
|
|
\version 2021-10-30, V1.0.0, firmware for GD32W51x
|
|
*/
|
|
|
|
/*
|
|
Copyright (c) 2021, GigaDevice Semiconductor Inc.
|
|
|
|
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 "gd32w51x.h"
|
|
#include "i2c.h"
|
|
#include <stdio.h>
|
|
|
|
/*!
|
|
\brief configure the GPIO ports
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void gpio_config(void)
|
|
{
|
|
/* enable GPIOB clock */
|
|
rcu_periph_clock_enable(RCU_GPIOB);
|
|
/* enable GPIOC clock */
|
|
rcu_periph_clock_enable(RCU_GPIOA);
|
|
/* enable I2C1 clock */
|
|
rcu_periph_clock_enable(RCU_I2C1);
|
|
|
|
/* connect PA8 to I2C1_SDA */
|
|
gpio_af_set(GPIOA, GPIO_AF_6, GPIO_PIN_8);
|
|
/* connect PB15 to I2C1_SCL */
|
|
gpio_af_set(GPIOB, GPIO_AF_6, GPIO_PIN_15);
|
|
/* configure GPIO pins of I2C1 */
|
|
gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_8);
|
|
gpio_output_options_set(GPIOA, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ, GPIO_PIN_8);
|
|
gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_15);
|
|
gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_25MHZ, GPIO_PIN_15);
|
|
}
|
|
|
|
/*!
|
|
\brief configure the I2C1 interface
|
|
\param[in] none
|
|
\param[out] none
|
|
\retval none
|
|
*/
|
|
void i2c_config(void)
|
|
{
|
|
/* configure I2C timing */
|
|
i2c_timing_config(I2C1, 0, 0x4, 0);
|
|
i2c_master_clock_config(I2C1, 0x1A, 0x4F);
|
|
/* enable I2C1 */
|
|
i2c_enable(I2C1);
|
|
|
|
/* enable the I2C1 interrupt */
|
|
i2c_interrupt_enable(I2C1, I2C_INT_ERR | I2C_INT_STPDET | I2C_INT_RBNE | I2C_INT_TC | I2C_INT_TI);
|
|
nvic_irq_enable(I2C1_EV_IRQn, 0, 2);
|
|
nvic_irq_enable(I2C1_ER_IRQn, 0, 1);
|
|
}
|