65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*#############################################################################
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## Author: Shaun Reed ##
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## Legal: All Content (c) 2025 Shaun Reed, all rights reserved ##
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## ##
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## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com ##
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##############################################################################
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*/
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#ifndef I2C_H
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#define I2C_H
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#define I2C_BUS_PORT 0
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#define I2C_DEFAULT_PIN_RST (-1)
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#include <driver/i2c_master.h>
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#include <esp_log.h>
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/// Tag used for ESP logging.
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static const char* I2C_TAG = "I2C component";
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/**
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* ESP I2C master bus handle getter.
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*/
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static i2c_master_bus_handle_t I2C_get()
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{
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i2c_master_bus_handle_t i2c = NULL;
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ESP_ERROR_CHECK(i2c_master_get_bus_handle(0, &i2c));
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return i2c;
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}
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/**
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* Construct an ESP I2C master bus given a specific ESP I2C configuration.
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* An I2C constructor may only be called one time in any application.
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*
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* @param config ESP I2C master bus configuration.
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*/
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static void I2C_config_init(const i2c_master_bus_config_t config)
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{
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i2c_master_bus_handle_t i2c = NULL;
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ESP_LOGI(I2C_TAG, "Initializing new master I2C bus");
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ESP_ERROR_CHECK(i2c_new_master_bus(&config, &i2c));
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}
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/**
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* Construct and initialize an ESP I2C master bus.
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* An I2C constructor may only be called one time in any application.
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*
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* @param sda GPIO pin for SDA
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* @param scl GPIO pin for SCL
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*/
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static void I2C_init(gpio_num_t sda, gpio_num_t scl)
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{
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I2C_config_init((i2c_master_bus_config_t){
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.i2c_port = I2C_BUS_PORT,
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.sda_io_num = sda,
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.scl_io_num = scl,
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.clk_source = I2C_CLK_SRC_DEFAULT,
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.glitch_ignore_cnt = 7,
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.flags =
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{
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.enable_internal_pullup = true,
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},
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});
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}
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#endif // I2C_H
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