mirror of
https://github.com/Lurkars/esp-ena.git
synced 2026-05-08 20:10:37 +02:00
added dependable build for interface choice in menuconfig
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Lurkars
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// Copyright 2020 Lukas Haubaum
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//
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// Licensed under the GNU Affero General Public License, Version 3;
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// https://www.gnu.org/licenses/agpl-3.0.html
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include "driver/i2c.h"
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#include "esp_log.h"
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#include "i2c-main.h"
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#include "display.h"
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#include "display-gfx.h"
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#include "ssd1306.h"
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void display_start(void)
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{
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if (!i2c_is_initialized())
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{
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i2c_main_init();
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}
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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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// Begin the I2C comm with SSD1306's address (SLA+Write)
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i2c_master_write_byte(cmd, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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// Tell the SSD1306 that a command stream is incoming
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i2c_master_write_byte(cmd, SSD1306_CONTROL_CMD_STREAM, true);
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// Turn the Display OFF
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i2c_master_write_byte(cmd, SSD1306_CMD_OFF, true);
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// Set mux ration tp select max number of rows - 64
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i2c_master_write_byte(cmd, SSD1306_CMD_MULTIPLEX_RATIO, true);
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i2c_master_write_byte(cmd, 0x3F, true);
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// Set the display offset to 0
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i2c_master_write_byte(cmd, SSD1306_CMD_OFFSET, true);
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i2c_master_write_byte(cmd, 0x00, true);
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// Display start line to 0
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i2c_master_write_byte(cmd, SSD1306_CMD_START_LINE, true);
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// Mirror the x-axis. In case you set it up such that the pins are north.
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i2c_master_write_byte(cmd, SSD1306_CMD_SEGMENT_HIGH, true);
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// Mirror the y-axis. In case you set it up such that the pins are north.
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i2c_master_write_byte(cmd, SSD1306_CMD_SCAN_DIRECTION_REMAPPED, true);
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// Default - alternate COM pin map
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i2c_master_write_byte(cmd, SSD1306_CMD_COM_PINS, true);
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i2c_master_write_byte(cmd, 0x12, true);
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// set contrast
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i2c_master_write_byte(cmd, SSD1306_CMD_CONTRAST, true);
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i2c_master_write_byte(cmd, 0xFF, true);
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// Set display to enable rendering from GDDRAM (Graphic Display Data RAM)
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i2c_master_write_byte(cmd, SSD1306_CMD_RAM, true);
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// Normal mode!
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i2c_master_write_byte(cmd, SSD1306_CMD_NORMAL, true);
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// Default oscillator clock
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i2c_master_write_byte(cmd, SSD1306_CMD_CLOCK, true);
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i2c_master_write_byte(cmd, 0x80, true);
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// Enable the charge pump
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i2c_master_write_byte(cmd, SSD1306_CMD_CHARGE_PUMP, true);
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i2c_master_write_byte(cmd, 0x14, true);
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// Set precharge cycles to high cap type
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i2c_master_write_byte(cmd, SSD1306_CMD_PRE_CHARGE_PERIOD, true);
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i2c_master_write_byte(cmd, 0x22, true);
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// Set the V_COMH deselect volatage to max
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i2c_master_write_byte(cmd, SSD1306_CMD_VCOMH, true);
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i2c_master_write_byte(cmd, 0x30, true);
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// Horizonatal addressing mode to page addressing
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i2c_master_write_byte(cmd, SSD1306_CMD_MEMORY_MODE, true);
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i2c_master_write_byte(cmd, 0x02, true);
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//i2c_master_write_byte(cmd, 0x00, true);
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// i2c_master_write_byte(cmd, 0x10, true);
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// i2c_master_write_byte(cmd, SSD1306_CMD_SCROLL_STOP, true);
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// Turn the Display ON
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i2c_master_write_byte(cmd, SSD1306_CMD_ON, true);
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i2c_master_stop(cmd);
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ESP_ERROR_CHECK_WITHOUT_ABORT(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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void display_init_data(void)
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{
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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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// Begin the I2C comm with SSD1306's address (SLA+Write)
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i2c_master_write_byte(cmd, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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// Tell the SSD1306 that a command stream is incoming
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i2c_master_write_byte(cmd, SSD1306_CONTROL_CMD_STREAM, true);
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// set column start + end
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i2c_master_write_byte(cmd, SSD1306_CMD_COLUMN_LOW, true);
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i2c_master_write_byte(cmd, SSD1306_CMD_COLUMN_HIGH, true);
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// set page
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i2c_master_write_byte(cmd, SSD1306_CMD_PAGE, true);
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i2c_master_stop(cmd);
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ESP_ERROR_CHECK_WITHOUT_ABORT(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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void display_clear_line(uint8_t line, bool invert)
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{
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i2c_cmd_handle_t cmd;
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uint8_t *zeros = calloc(SSD1306_COLUMNS, sizeof(uint8_t));
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// set line
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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, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, SSD1306_CONTROL_CMD_STREAM, true);
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i2c_master_write_byte(cmd, SSD1306_CMD_COLUMN_LOW, true);
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i2c_master_write_byte(cmd, SSD1306_CMD_COLUMN_HIGH, true);
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i2c_master_write_byte(cmd, SSD1306_CMD_PAGE | line, 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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// fill line with zeros
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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, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, SSD1306_CONTROL_DATA_STREAM, true);
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i2c_master_write(cmd, zeros, SSD1306_COLUMNS, 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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free(zeros);
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}
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void display_clear(void)
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{
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for (uint8_t i = 0; i < SSD1306_PAGES; i++)
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{
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display_clear_line(i, false);
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}
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}
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void display_on(bool on)
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{
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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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// Begin the I2C comm with SSD1306's address (SLA+Write)
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i2c_master_write_byte(cmd, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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// Tell the SSD1306 that a command stream is incoming
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i2c_master_write_byte(cmd, SSD1306_CONTROL_CMD_STREAM, true);
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if (on)
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{
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// Turn the Display ON
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i2c_master_write_byte(cmd, SSD1306_CMD_ON, true);
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}
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else
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{
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// Turn the Display OFF
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i2c_master_write_byte(cmd, SSD1306_CMD_OFF, true);
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}
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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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void display_data(uint8_t *data, size_t length, uint8_t line, uint8_t offset, bool invert)
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{
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uint8_t column = offset;
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if (column > SSD1306_COLUMNS)
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{
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column = 0;
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}
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size_t columns = length;
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if (columns > (SSD1306_COLUMNS - column))
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{
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columns = (SSD1306_COLUMNS - column);
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}
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display_init_data();
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i2c_cmd_handle_t cmd;
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// set line
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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, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, SSD1306_CONTROL_CMD_STREAM, true);
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i2c_master_write_byte(cmd, SSD1306_CMD_COLUMN_LOW | (column & 0XF), true);
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i2c_master_write_byte(cmd, SSD1306_CMD_COLUMN_HIGH | (column >> 4), true);
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i2c_master_write_byte(cmd, SSD1306_CMD_PAGE | line, 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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if (invert)
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{
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for (uint8_t i = 0; i < columns; i++)
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{
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data[i] = ~data[i];
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}
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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, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(cmd, SSD1306_CONTROL_DATA_STREAM, true);
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i2c_master_write(cmd, data, columns, 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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void display_flipped(bool flipped)
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{
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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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// Begin the I2C comm with SSD1306's address (SLA+Write)
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i2c_master_write_byte(cmd, (SSD1306_ADDRESS << 1) | I2C_MASTER_WRITE, true);
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// Tell the SSD1306 that a command stream is incoming
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i2c_master_write_byte(cmd, SSD1306_CONTROL_CMD_STREAM, true);
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i2c_master_write_byte(cmd, SSD1306_CMD_SEGMENT_HIGH, true);
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if (flipped)
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{
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i2c_master_write_byte(cmd, SSD1306_CMD_SCAN_DIRECTION_NORMAL, true);
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}
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else
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{
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i2c_master_write_byte(cmd, SSD1306_CMD_SCAN_DIRECTION_REMAPPED, true);
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}
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i2c_master_stop(cmd);
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ESP_ERROR_CHECK_WITHOUT_ABORT(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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@@ -0,0 +1,80 @@
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// Copyright 2020 Lukas Haubaum
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//
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// Licensed under the GNU Affero General Public License, Version 3;
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// https://www.gnu.org/licenses/agpl-3.0.html
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @file
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*
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* @brief I2C driver for SSD1306 display
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*
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*/
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#ifndef _ssd1306_H_
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#define _ssd1306_H_
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#include "esp_system.h"
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#define SSD1306_ADDRESS (0x3C)
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#define SSD1306_COLUMNS (128)
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#define SSD1306_PAGES (8)
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// Write mode for I2C https://robotcantalk.blogspot.com/2015/03/interfacing-arduino-with-ssd1306-driven.html
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#define SSD1306_CONTROL_CMD_BYTE (0x80)
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#define SSD1306_CONTROL_CMD_STREAM (0x00)
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#define SSD1306_CONTROL_DATA_BYTE (0xC0)
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#define SSD1306_CONTROL_DATA_STREAM (0x40)
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// 1. Fundamental Command Table
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#define SSD1306_CMD_CONTRAST (0x81)
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#define SSD1306_CMD_RAM (0xA4)
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#define SSD1306_CMD_ALL_ON (0xA5)
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#define SSD1306_CMD_NORMAL (0xA6)
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#define SSD1306_CMD_INVERSE (0xA7)
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#define SSD1306_CMD_OFF (0xAE)
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#define SSD1306_CMD_ON (0xAF)
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// 2. Scrolling Command Table
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#define SSD1306_CMD_SCROLL_HORI_RIGHT (0x26)
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#define SSD1306_CMD_SCROLL_HORI_LEFT (0x27)
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#define SSD1306_CMD_SCROLL_VERT_RIGHT (0x29)
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#define SSD1306_CMD_SCROLL_VERT_LEFT (0x2A)
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#define SSD1306_CMD_SCROLL_STOP (0x2E)
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#define SSD1306_CMD_SCROLL_START (0x2F)
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#define SSD1306_CMD_SCROLL_VERT_AREA (0xA3)
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// 3. Addressing Setting Command Table
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#define SSD1306_CMD_COLUMN_LOW (0x00)
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#define SSD1306_CMD_COLUMN_HIGH (0x10)
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#define SSD1306_CMD_MEMORY_MODE (0x20)
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#define SSD1306_CMD_COLUMN_ADDRESS (0x21)
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#define SSD1306_CMD_PAGE_ADDRESS (0x22)
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#define SSD1306_CMD_PAGE (0xB0)
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// 4. Hardware Configuration (Panel resolution & layout related) Command Table
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#define SSD1306_CMD_START_LINE (0x40)
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#define SSD1306_CMD_SEGMENT_LOW (0xA0)
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#define SSD1306_CMD_SEGMENT_HIGH (0xA1)
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#define SSD1306_CMD_MULTIPLEX_RATIO (0xA8)
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#define SSD1306_CMD_SCAN_DIRECTION_NORMAL (0xC0)
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#define SSD1306_CMD_SCAN_DIRECTION_REMAPPED (0xC8)
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#define SSD1306_CMD_OFFSET (0xD3)
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#define SSD1306_CMD_COM_PINS (0xDA)
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// 5. Timing & Driving Scheme Setting Command Table
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#define SSD1306_CMD_CLOCK (0xD5)
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#define SSD1306_CMD_PRE_CHARGE_PERIOD (0xD9)
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#define SSD1306_CMD_VCOMH (0xDB)
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#define SSD1306_CMD_NOP (0xE3)
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// 1. Charge Pump Command Table
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#define SSD1306_CMD_CHARGE_PUMP (0x8D)
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#endif
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