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esp-idf-ssd1306/components/ssd1306/ssd1306_i2c.c

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#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2c.h"
#include "esp_log.h"
#include "ssd1306.h"
#define tag "SSD1306"
#define I2C_NUM I2C_NUM_0
//#define I2C_NUM I2C_NUM_1
//#define I2C_MASTER_FREQ_HZ 400000 /*!< I2C master clock frequency. no higher than 1MHz for now */
#define I2C_MASTER_FREQ_HZ 800000 /*!< I2C master clock frequency. no higher than 1MHz for now */
//#define I2C_MASTER_FREQ_HZ 1000000 /*!< I2C master clock frequency. no higher than 1MHz for now */
void i2c_master_init(SSD1306_t * dev, int16_t sda, int16_t scl, int16_t reset)
{
i2c_config_t i2c_config = {
.mode = I2C_MODE_MASTER,
.sda_io_num = sda,
.scl_io_num = scl,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_MASTER_FREQ_HZ
};
ESP_ERROR_CHECK(i2c_param_config(I2C_NUM, &i2c_config));
ESP_ERROR_CHECK(i2c_driver_install(I2C_NUM, I2C_MODE_MASTER, 0, 0, 0));
if (reset >= 0) {
//gpio_pad_select_gpio(reset);
gpio_reset_pin(reset);
gpio_set_direction(reset, GPIO_MODE_OUTPUT);
gpio_set_level(reset, 0);
vTaskDelay(50 / portTICK_PERIOD_MS);
gpio_set_level(reset, 1);
}
dev->_address = I2CAddress;
dev->_flip = false;
}
void i2c_init(SSD1306_t * dev, int width, int height) {
dev->_width = width;
dev->_height = height;
dev->_pages = 8;
if (dev->_height == 32) dev->_pages = 4;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev->_address << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_OFF, true); // AE
i2c_master_write_byte(cmd, OLED_CMD_SET_MUX_RATIO, true); // A8
if (dev->_height == 64) i2c_master_write_byte(cmd, 0x3F, true);
if (dev->_height == 32) i2c_master_write_byte(cmd, 0x1F, true);
i2c_master_write_byte(cmd, OLED_CMD_SET_DISPLAY_OFFSET, true); // D3
i2c_master_write_byte(cmd, 0x00, true);
i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_DATA_STREAM, true); // 40
//i2c_master_write_byte(cmd, OLED_CMD_SET_SEGMENT_REMAP, true); // A1
if (dev->_flip) {
i2c_master_write_byte(cmd, OLED_CMD_SET_SEGMENT_REMAP_0, true); // A0
} else {
i2c_master_write_byte(cmd, OLED_CMD_SET_SEGMENT_REMAP_1, true); // A1
}
i2c_master_write_byte(cmd, OLED_CMD_SET_COM_SCAN_MODE, true); // C8
i2c_master_write_byte(cmd, OLED_CMD_SET_DISPLAY_CLK_DIV, true); // D5
i2c_master_write_byte(cmd, 0x80, true);
i2c_master_write_byte(cmd, OLED_CMD_SET_COM_PIN_MAP, true); // DA
if (dev->_height == 64) i2c_master_write_byte(cmd, 0x12, true);
if (dev->_height == 32) i2c_master_write_byte(cmd, 0x02, true);
i2c_master_write_byte(cmd, OLED_CMD_SET_CONTRAST, true); // 81
i2c_master_write_byte(cmd, 0xFF, true);
i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_RAM, true); // A4
i2c_master_write_byte(cmd, OLED_CMD_SET_VCOMH_DESELCT, true); // DB
i2c_master_write_byte(cmd, 0x40, true);
i2c_master_write_byte(cmd, OLED_CMD_SET_MEMORY_ADDR_MODE, true); // 20
//i2c_master_write_byte(cmd, OLED_CMD_SET_HORI_ADDR_MODE, true); // 00
i2c_master_write_byte(cmd, OLED_CMD_SET_PAGE_ADDR_MODE, true); // 02
// Set Lower Column Start Address for Page Addressing Mode
i2c_master_write_byte(cmd, 0x00, true);
// Set Higher Column Start Address for Page Addressing Mode
i2c_master_write_byte(cmd, 0x10, true);
i2c_master_write_byte(cmd, OLED_CMD_SET_CHARGE_PUMP, true); // 8D
i2c_master_write_byte(cmd, 0x14, true);
i2c_master_write_byte(cmd, OLED_CMD_DEACTIVE_SCROLL, true); // 2E
i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_NORMAL, true); // A6
i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_ON, true); // AF
i2c_master_stop(cmd);
esp_err_t espRc = i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
if (espRc == ESP_OK) {
ESP_LOGI(tag, "OLED configured successfully");
} else {
ESP_LOGE(tag, "OLED configuration failed. code: 0x%.2X", espRc);
}
i2c_cmd_link_delete(cmd);
}
void i2c_display_image(SSD1306_t * dev, int page, int seg, uint8_t * images, int width) {
i2c_cmd_handle_t cmd;
if (page >= dev->_pages) return;
if (seg >= dev->_width) return;
int _seg = seg + CONFIG_OFFSETX;
uint8_t columLow = _seg & 0x0F;
uint8_t columHigh = (_seg >> 4) & 0x0F;
int _page = page;
if (dev->_flip) {
_page = (dev->_pages - page) - 1;
}
cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev->_address << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
// Set Lower Column Start Address for Page Addressing Mode
i2c_master_write_byte(cmd, (0x00 + columLow), true);
// Set Higher Column Start Address for Page Addressing Mode
i2c_master_write_byte(cmd, (0x10 + columHigh), true);
// Set Page Start Address for Page Addressing Mode
i2c_master_write_byte(cmd, 0xB0 | _page, true);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev->_address << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_DATA_STREAM, true);
i2c_master_write(cmd, images, width, true);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
}
void i2c_contrast(SSD1306_t * dev, int contrast) {
i2c_cmd_handle_t cmd;
int _contrast = contrast;
if (contrast < 0x0) _contrast = 0;
if (contrast > 0xFF) _contrast = 0xFF;
cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev->_address << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
i2c_master_write_byte(cmd, OLED_CMD_SET_CONTRAST, true); // 81
i2c_master_write_byte(cmd, _contrast, true);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
}
void i2c_hardware_scroll(SSD1306_t * dev, ssd1306_scroll_type_t scroll) {
esp_err_t espRc;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev->_address << 1) | I2C_MASTER_WRITE, true);
i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
if (scroll == SCROLL_RIGHT) {
i2c_master_write_byte(cmd, OLED_CMD_HORIZONTAL_RIGHT, true); // 26
i2c_master_write_byte(cmd, 0x00, true); // Dummy byte
i2c_master_write_byte(cmd, 0x00, true); // Define start page address
i2c_master_write_byte(cmd, 0x07, true); // Frame frequency
i2c_master_write_byte(cmd, 0x07, true); // Define end page address
i2c_master_write_byte(cmd, 0x00, true); //
i2c_master_write_byte(cmd, 0xFF, true); //
i2c_master_write_byte(cmd, OLED_CMD_ACTIVE_SCROLL, true); // 2F
}
if (scroll == SCROLL_LEFT) {
i2c_master_write_byte(cmd, OLED_CMD_HORIZONTAL_LEFT, true); // 27
i2c_master_write_byte(cmd, 0x00, true); // Dummy byte
i2c_master_write_byte(cmd, 0x00, true); // Define start page address
i2c_master_write_byte(cmd, 0x07, true); // Frame frequency
i2c_master_write_byte(cmd, 0x07, true); // Define end page address
i2c_master_write_byte(cmd, 0x00, true); //
i2c_master_write_byte(cmd, 0xFF, true); //
i2c_master_write_byte(cmd, OLED_CMD_ACTIVE_SCROLL, true); // 2F
}
if (scroll == SCROLL_DOWN) {
i2c_master_write_byte(cmd, OLED_CMD_CONTINUOUS_SCROLL, true); // 29
i2c_master_write_byte(cmd, 0x00, true); // Dummy byte
i2c_master_write_byte(cmd, 0x00, true); // Define start page address
i2c_master_write_byte(cmd, 0x07, true); // Frame frequency
//i2c_master_write_byte(cmd, 0x01, true); // Define end page address
i2c_master_write_byte(cmd, 0x00, true); // Define end page address
i2c_master_write_byte(cmd, 0x3F, true); // Vertical scrolling offset
i2c_master_write_byte(cmd, OLED_CMD_VERTICAL, true); // A3
i2c_master_write_byte(cmd, 0x00, true);
if (dev->_height == 64)
//i2c_master_write_byte(cmd, 0x7F, true);
i2c_master_write_byte(cmd, 0x40, true);
if (dev->_height == 32)
i2c_master_write_byte(cmd, 0x20, true);
i2c_master_write_byte(cmd, OLED_CMD_ACTIVE_SCROLL, true); // 2F
}
if (scroll == SCROLL_UP) {
i2c_master_write_byte(cmd, OLED_CMD_CONTINUOUS_SCROLL, true); // 29
i2c_master_write_byte(cmd, 0x00, true); // Dummy byte
i2c_master_write_byte(cmd, 0x00, true); // Define start page address
i2c_master_write_byte(cmd, 0x07, true); // Frame frequency
//i2c_master_write_byte(cmd, 0x01, true); // Define end page address
i2c_master_write_byte(cmd, 0x00, true); // Define end page address
i2c_master_write_byte(cmd, 0x01, true); // Vertical scrolling offset
i2c_master_write_byte(cmd, OLED_CMD_VERTICAL, true); // A3
i2c_master_write_byte(cmd, 0x00, true);
if (dev->_height == 64)
//i2c_master_write_byte(cmd, 0x7F, true);
i2c_master_write_byte(cmd, 0x40, true);
if (dev->_height == 32)
i2c_master_write_byte(cmd, 0x20, true);
i2c_master_write_byte(cmd, OLED_CMD_ACTIVE_SCROLL, true); // 2F
}
if (scroll == SCROLL_STOP) {
i2c_master_write_byte(cmd, OLED_CMD_DEACTIVE_SCROLL, true); // 2E
}
i2c_master_stop(cmd);
espRc = i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
if (espRc == ESP_OK) {
ESP_LOGD(tag, "Scroll command succeeded");
} else {
ESP_LOGE(tag, "Scroll command failed. code: 0x%.2X", espRc);
}
i2c_cmd_link_delete(cmd);
}
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