181 lines
5.8 KiB
C++
181 lines
5.8 KiB
C++
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#include "ssd1366.h"
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#include "font8x8_basic.h"
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#include <string.h>
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#include "driver/gpio.h"
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#define SSD1366_RST_PIN GPIO_NUM_16
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#define SSD1366_VEXT_PIN GPIO_NUM_21
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#define I2C_NUM I2C_NUM_0
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static const char *tag = "oled";
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void ssd1306_init()
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{
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esp_err_t espRc;
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gpio_set_direction(SSD1366_RST_PIN, GPIO_MODE_OUTPUT);
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gpio_set_direction(SSD1366_VEXT_PIN, GPIO_MODE_OUTPUT);
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gpio_set_level(SSD1366_VEXT_PIN, 0); //enable power to oled
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gpio_set_level(SSD1366_RST_PIN, 0);
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vTaskDelay(50 / portTICK_PERIOD_MS);
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gpio_set_level(SSD1366_RST_PIN, 1);
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i2c_cmd_handle_t cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
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i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_OFF, true); // AE
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i2c_master_write_byte(cmd, OLED_CMD_SET_MUX_RATIO, true); // A8
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i2c_master_write_byte(cmd, 0x3F, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_DISPLAY_OFFSET, true); // D3
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i2c_master_write_byte(cmd, 0x00, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_DISPLAY_START_LINE, true); // 40
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i2c_master_write_byte(cmd, OLED_CMD_SET_SEGMENT_REMAP, true); // reverse left-right mapping
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i2c_master_write_byte(cmd, OLED_CMD_SET_COM_SCAN_MODE, true); // reverse up-bottom mapping
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i2c_master_write_byte(cmd, OLED_CMD_SET_DISPLAY_CLK_DIV, true); // D5
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i2c_master_write_byte(cmd, 0x80, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_COM_PIN_MAP, true); // DA
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i2c_master_write_byte(cmd, 0x12, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_CONTRAST, true); // 81
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i2c_master_write_byte(cmd, 0xFF, true);
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i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_RAM, true); // A4
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i2c_master_write_byte(cmd, OLED_CMD_SET_VCOMH_DESELCT, true); // DB
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i2c_master_write_byte(cmd, 0x40, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_MEMORY_ADDR_MODE, true); // 20
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//i2c_master_write_byte(cmd, OLED_CMD_SET_HORI_ADDR_MODE, true); // 00
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i2c_master_write_byte(cmd, OLED_CMD_SET_PAGE_ADDR_MODE, true); // 02
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// Set Lower Column Start Address for Page Addressing Mode
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i2c_master_write_byte(cmd, 0x00, true);
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// Set Higher Column Start Address for Page Addressing Mode
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i2c_master_write_byte(cmd, 0x10, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_CHARGE_PUMP, true); // 8D
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i2c_master_write_byte(cmd, 0x14, true);
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i2c_master_write_byte(cmd, OLED_CMD_DEACTIVE_SCROLL, true); // 2E
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i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_NORMAL, true); // A6
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i2c_master_write_byte(cmd, OLED_CMD_DISPLAY_ON, true);
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i2c_master_stop(cmd);
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espRc = i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
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if (espRc == ESP_OK)
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{
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ESP_LOGI(tag, "OLED configured successfully");
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}
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else
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{
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ESP_LOGE(tag, "OLED configuration failed. code: 0x%.2X", espRc);
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}
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i2c_cmd_link_delete(cmd);
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}
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void i2c_contrast( int contrast) {
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i2c_cmd_handle_t cmd;
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int _contrast = contrast;
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if (contrast < 0x0) _contrast = 0;
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if (contrast > 0xFF) _contrast = 0xFF;
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
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i2c_master_write_byte(cmd, OLED_CMD_SET_CONTRAST, true); // 81
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i2c_master_write_byte(cmd, _contrast, true);
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i2c_master_stop(cmd);
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i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
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i2c_cmd_link_delete(cmd);
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}
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void ssd1306_display_clear(void) {
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i2c_cmd_handle_t cmd;
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uint8_t zero[128] = {0};
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for (uint8_t i = 0; i < 8; i++) {
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_SINGLE, true);
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i2c_master_write_byte(cmd, 0xB0 | i, true); // Set GDDRAM page start address
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_DATA_STREAM, true);
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i2c_master_write(cmd, zero, 128, true);
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i2c_master_stop(cmd);
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i2c_master_cmd_begin(I2C_NUM_0, cmd, 10/portTICK_PERIOD_MS);
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i2c_cmd_link_delete(cmd);
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}
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}
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void ssd1306_display_text(char* text, uint16_t text_len)
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{
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i2c_cmd_handle_t cmd;
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uint8_t cur_page = 0;
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
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i2c_master_write_byte(cmd, 0x00, true); // reset column
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i2c_master_write_byte(cmd, 0x10, true);
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i2c_master_write_byte(cmd, 0xB0 | cur_page, true); // reset page
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i2c_master_stop(cmd);
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i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
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i2c_cmd_link_delete(cmd);
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for (uint8_t i = 0; i < text_len; i++)
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{
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if (text[i] == '\n')
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{
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_CMD_STREAM, true);
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i2c_master_write_byte(cmd, 0x00, true); // reset column
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i2c_master_write_byte(cmd, 0x10, true);
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i2c_master_write_byte(cmd, 0xB0 | ++cur_page, true); // increment page
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i2c_master_stop(cmd);
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i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
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i2c_cmd_link_delete(cmd);
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}
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else
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{
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cmd = i2c_cmd_link_create();
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i2c_master_start(cmd);
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i2c_master_write_byte(cmd, (OLED_I2C_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, OLED_CONTROL_BYTE_DATA_STREAM, true);
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i2c_master_write(cmd, font8x8_basic_tr[(uint8_t)text[i]], 8, true);
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i2c_master_stop(cmd);
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i2c_master_cmd_begin(I2C_NUM, cmd, 10/portTICK_PERIOD_MS);
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i2c_cmd_link_delete(cmd);
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}
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}
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}
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void task_ssd1306_display_text(void *pvParameters)
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{
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char *pcTaskName;
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pcTaskName = (char *) pvParameters;
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//char text[13] = "Hello world!";
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//uint8_t text_len = strlen(text);
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ssd1306_display_text(pcTaskName, strlen(pcTaskName));
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vTaskDelete(NULL);
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}
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