51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <stdio.h>
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#include "driver/i2c_master.h"
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#define I2C_SCL 1 /*FIXME*/
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#define I2C_SDA 2
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/* Docs: https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf */
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#define DISP_ADDRESS 0X3c
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#define I2C_FREQ 100000
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static i2c_master_dev_handle_t disp_handle;
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void init_i2c(void){
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i2c_master_bus_config_t i2c_mst_config = {
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.clk_source = I2C_CLK_SRC_DEFAULT,
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.i2c_port = I2C_PORT_NUM_0,
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.scl_io_num = I2C_SCL,
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.sda_io_num = I2C_SDA,
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.glitch_ignore_cnt = 7,
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.flags.enable_internal_pullup = true,
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};
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i2c_master_bus_handle_t bus_handle;
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ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_mst_config, &bus_handle));
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i2c_device_config_t dev_cfg = {
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.dev_addr_length = I2C_ADDR_BIT_LEN_7,
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.device_address = DISP_ADDRESS,
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.scl_speed_hz = I2C_FREQ,
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};
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ESP_ERROR_CHECK(i2c_master_bus_add_device(bus_handle, &dev_cfg, &disp_handle));
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}
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void i2c_disp_send_cmd(uint8_t cmd){
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uint8_t data[2] = {0x00, cmd}; /*command mode*/
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ESP_ERROR_CHECK(
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i2c_master_transmit(disp_handle, data, sizeof(data), -1)
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);
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}
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void init_display(void){
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}
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void app_main(void){
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init_i2c();
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} |