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https://github.com/espressif/esp-idf.git
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89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stddef.h>
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#include "hal/i2c_hal.h"
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#include "hal/i2c_ll.h"
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#include "hal/i2c_types.h"
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#if SOC_I2C_SUPPORT_SLAVE
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void i2c_hal_slave_init(i2c_hal_context_t *hal)
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{
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i2c_ll_slave_init(hal->dev);
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//Use fifo mode
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i2c_ll_set_fifo_mode(hal->dev, true);
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//MSB
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i2c_ll_set_data_mode(hal->dev, I2C_DATA_MODE_MSB_FIRST, I2C_DATA_MODE_MSB_FIRST);
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//Reset fifo
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i2c_ll_txfifo_rst(hal->dev);
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i2c_ll_rxfifo_rst(hal->dev);
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}
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#endif
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void i2c_hal_set_bus_timing(i2c_hal_context_t *hal, int scl_freq, i2c_clock_source_t src_clk, int source_freq)
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{
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i2c_ll_set_source_clk(hal->dev, src_clk);
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i2c_hal_clk_config_t clk_cal = {0};
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i2c_ll_cal_bus_clk(source_freq, scl_freq, &clk_cal);
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i2c_ll_set_bus_timing(hal->dev, &clk_cal);
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}
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void i2c_hal_master_fsm_rst(i2c_hal_context_t *hal)
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{
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i2c_ll_master_fsm_rst(hal->dev);
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}
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void i2c_hal_master_init(i2c_hal_context_t *hal)
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{
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i2c_ll_master_init(hal->dev);
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//Use fifo mode
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i2c_ll_set_fifo_mode(hal->dev, true);
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//MSB
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i2c_ll_set_data_mode(hal->dev, I2C_DATA_MODE_MSB_FIRST, I2C_DATA_MODE_MSB_FIRST);
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//Reset fifo
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i2c_ll_txfifo_rst(hal->dev);
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i2c_ll_rxfifo_rst(hal->dev);
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}
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void i2c_hal_init(i2c_hal_context_t *hal, int i2c_port)
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{
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if (hal->dev == NULL) {
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hal->dev = I2C_LL_GET_HW(i2c_port);
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i2c_ll_enable_controller_clock(hal->dev, true);
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}
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}
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void i2c_hal_deinit(i2c_hal_context_t *hal)
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{
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i2c_ll_enable_controller_clock(hal->dev, false);
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hal->dev = NULL;
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}
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void i2c_hal_master_trans_start(i2c_hal_context_t *hal)
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{
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i2c_ll_update(hal->dev);
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i2c_ll_trans_start(hal->dev);
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}
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void i2c_hal_get_timing_config(i2c_hal_context_t *hal, i2c_hal_timing_config_t *timing_config)
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{
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i2c_ll_get_scl_clk_timing(hal->dev, &timing_config->high_period, &timing_config->low_period, &timing_config->wait_high_period);
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i2c_ll_get_start_timing(hal->dev, &timing_config->rstart_setup, &timing_config->start_hold);
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i2c_ll_get_stop_timing(hal->dev, &timing_config->stop_setup, &timing_config->stop_hold);
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i2c_ll_get_sda_timing(hal->dev, &timing_config->sda_sample, &timing_config->sda_hold);
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i2c_ll_get_tout(hal->dev, &timing_config->timeout);
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}
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void i2c_hal_set_timing_config(i2c_hal_context_t *hal, i2c_hal_timing_config_t *timing_config)
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{
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i2c_ll_set_scl_clk_timing(hal->dev, timing_config->high_period, timing_config->low_period, timing_config->wait_high_period);
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i2c_ll_set_start_timing(hal->dev, timing_config->rstart_setup, timing_config->start_hold);
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i2c_ll_set_stop_timing(hal->dev, timing_config->stop_setup, timing_config->stop_hold);
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i2c_ll_set_sda_timing(hal->dev, timing_config->sda_sample, timing_config->sda_hold);
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i2c_ll_set_tout(hal->dev, timing_config->timeout);
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}
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