143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/*
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* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-03-19 wangyq the first version
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* 2019-11-01 wangyq update libraries
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include <rtdevice.h>
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#include "board.h"
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#include "drv_i2c.h"
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#include <ald_i2c.h>
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#include <ald_gpio.h>
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#ifdef RT_USING_I2C
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#define TIMEOUT 0x0FFF
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/* I2C struct definition */
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static i2c_handle_t _h_i2c0, _h_i2c1;
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static void _i2c_init(void)
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{
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gpio_init_t gpio_instruct;
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/* Initialize I2C Pin */
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gpio_instruct.mode = GPIO_MODE_OUTPUT;
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gpio_instruct.odos = GPIO_PUSH_PULL;
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gpio_instruct.pupd = GPIO_PUSH_UP;
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gpio_instruct.odrv = GPIO_OUT_DRIVE_NORMAL;
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gpio_instruct.flt = GPIO_FILTER_DISABLE;
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gpio_instruct.type = GPIO_TYPE_CMOS;
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gpio_instruct.func = GPIO_FUNC_5;
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#ifdef BSP_USING_I2C0
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/* Initialize I2C Function */
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_h_i2c0.perh = I2C0;
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_h_i2c0.init.clk_speed = 100000;
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_h_i2c0.init.duty = I2C_DUTYCYCLE_2;
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_h_i2c0.init.own_addr1 = 0x0A;
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_h_i2c0.init.addr_mode = I2C_ADDR_7BIT;
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_h_i2c0.init.general_call = I2C_GENERALCALL_DISABLE;
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_h_i2c0.init.no_stretch = I2C_NOSTRETCH_ENABLE;
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ald_i2c_reset(&_h_i2c0);
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ald_i2c_init(&_h_i2c0);
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/* I2C0_SCL->PB8, I2C0_SDA->PB9 */
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ald_gpio_init(GPIOB, GPIO_PIN_8 | GPIO_PIN_9, &gpio_instruct);
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#endif
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#ifdef BSP_USING_I2C1
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/* Initialize i2c function */
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_h_i2c1.perh = I2C1;
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_h_i2c1.init.clk_speed = 100000;
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_h_i2c1.init.duty = I2C_DUTYCYCLE_2;
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_h_i2c1.init.own_addr1 = 0xA0;
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_h_i2c1.init.addr_mode = I2C_ADDR_7BIT;
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_h_i2c1.init.general_call = I2C_GENERALCALL_DISABLE;
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_h_i2c1.init.no_stretch = I2C_NOSTRETCH_ENABLE;
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ald_i2c_reset(&_h_i2c1);
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ald_i2c_init(&_h_i2c1);
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/* I2C1_SCL->PB10, I2C1_SDA->PB11 */
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ald_gpio_init(GPIOB, GPIO_PIN_10 | GPIO_PIN_11, &gpio_instruct);
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#endif
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}
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static rt_size_t es32f0_master_xfer(struct rt_i2c_bus_device *bus,
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struct rt_i2c_msg msgs[],
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rt_uint32_t num)
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{
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struct rt_i2c_msg *msg;
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rt_uint32_t i;
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rt_err_t ret = RT_ERROR;
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for (i = 0; i < num; i++)
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{
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msg = &msgs[i];
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if (msg->flags & RT_I2C_RD)
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{
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if (ald_i2c_master_recv(bus->priv, msg->addr << 1, msg->buf, msg->len, TIMEOUT) != 0)
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{
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i2c_dbg("i2c bus write failed,i2c bus stop!\n");
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goto out;
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}
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}
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else
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{
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if (ald_i2c_master_send(bus->priv, msg->addr << 1, msg->buf, msg->len, TIMEOUT) != 0)
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{
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i2c_dbg("i2c bus write failed,i2c bus stop!\n");
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goto out;
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}
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}
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}
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ret = i;
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out:
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i2c_dbg("send stop condition\n");
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return ret;
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}
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const struct rt_i2c_bus_device_ops es32f0_i2c_ops =
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{
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es32f0_master_xfer,
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RT_NULL,
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RT_NULL,
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};
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int rt_hw_i2c_init(void)
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{
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_i2c_init();
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#ifdef BSP_USING_I2C0
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/* define i2c Instance */
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static struct rt_i2c_bus_device _i2c_device0;
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rt_memset((void *)&_i2c_device0, 0, sizeof(struct rt_i2c_bus_device));
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_i2c_device0.ops = &es32f0_i2c_ops;
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_i2c_device0.priv = &_h_i2c0;
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rt_i2c_bus_device_register(&_i2c_device0, "i2c0");
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#endif
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#ifdef BSP_USING_I2C1
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/* define i2c Instance */
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static struct rt_i2c_bus_device _i2c_device1;
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rt_memset((void *)&_i2c_device1, 0, sizeof(struct rt_i2c_bus_device));
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_i2c_device1.ops = &es32f0_i2c_ops;
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_i2c_device1.priv = &_h_i2c1;
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rt_i2c_bus_device_register(&_i2c_device1, "i2c1");
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#endif
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return RT_EOK;
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}
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INIT_DEVICE_EXPORT(rt_hw_i2c_init);
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#endif
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