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+/*
+Copyright 2019 Ryan Caltabiano <https://github.com/XScorpion2>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "i2c_master.h"
+#include "oled_driver.h"
+#include OLED_FONT_H
+#include "timer.h"
+#include "print.h"
+
+#include <string.h>
+
+#include "progmem.h"
+
+#include "keyboard.h"
+
+// Used commands from spec sheet: https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf
+// for SH1106: https://www.velleman.eu/downloads/29/infosheets/sh1106_datasheet.pdf
+
+// Fundamental Commands
+#define CONTRAST 0x81
+#define DISPLAY_ALL_ON 0xA5
+#define DISPLAY_ALL_ON_RESUME 0xA4
+#define NORMAL_DISPLAY 0xA6
+#define INVERT_DISPLAY 0xA7
+#define DISPLAY_ON 0xAF
+#define DISPLAY_OFF 0xAE
+#define NOP 0xE3
+
+// Scrolling Commands
+#define ACTIVATE_SCROLL 0x2F
+#define DEACTIVATE_SCROLL 0x2E
+#define SCROLL_RIGHT 0x26
+#define SCROLL_LEFT 0x27
+#define SCROLL_RIGHT_UP 0x29
+#define SCROLL_LEFT_UP 0x2A
+
+// Addressing Setting Commands
+#define MEMORY_MODE 0x20
+#define COLUMN_ADDR 0x21
+#define PAGE_ADDR 0x22
+#define PAM_SETCOLUMN_LSB 0x00
+#define PAM_SETCOLUMN_MSB 0x10
+#define PAM_PAGE_ADDR 0xB0 // 0xb0 -- 0xb7
+
+// Hardware Configuration Commands
+#define DISPLAY_START_LINE 0x40
+#define SEGMENT_REMAP 0xA0
+#define SEGMENT_REMAP_INV 0xA1
+#define MULTIPLEX_RATIO 0xA8
+#define COM_SCAN_INC 0xC0
+#define COM_SCAN_DEC 0xC8
+#define DISPLAY_OFFSET 0xD3
+#define COM_PINS 0xDA
+#define COM_PINS_SEQ 0x02
+#define COM_PINS_ALT 0x12
+#define COM_PINS_SEQ_LR 0x22
+#define COM_PINS_ALT_LR 0x32
+
+// Timing & Driving Commands
+#define DISPLAY_CLOCK 0xD5
+#define PRE_CHARGE_PERIOD 0xD9
+#define VCOM_DETECT 0xDB
+
+// Advance Graphic Commands
+#define FADE_BLINK 0x23
+#define ENABLE_FADE 0x20
+#define ENABLE_BLINK 0x30
+
+// Charge Pump Commands
+#define CHARGE_PUMP 0x8D
+
+// Commands specific to the SH1107 chip
+#define SH1107_DISPLAY_START_LINE 0xDC
+#define SH1107_MEMORY_MODE_PAGE 0x20
+#define SH1107_MEMORY_MODE_VERTICAL 0x21
+
+// Misc defines
+#ifndef OLED_BLOCK_COUNT
+# define OLED_BLOCK_COUNT (sizeof(OLED_BLOCK_TYPE) * 8)
+#endif
+#ifndef OLED_BLOCK_SIZE
+# define OLED_BLOCK_SIZE (OLED_MATRIX_SIZE / OLED_BLOCK_COUNT)
+#endif
+
+#define OLED_ALL_BLOCKS_MASK (((((OLED_BLOCK_TYPE)1 << (OLED_BLOCK_COUNT - 1)) - 1) << 1) | 1)
+
+#define OLED_IC_HAS_HORIZONTAL_MODE (OLED_IC == OLED_IC_SSD1306)
+#define OLED_IC_COM_PINS_ARE_COLUMNS (OLED_IC == OLED_IC_SH1107)
+
+#ifndef OLED_COM_PIN_COUNT
+# if OLED_IC == OLED_IC_SH1106
+# define OLED_COM_PIN_COUNT 64
+# elif OLED_IC == OLED_IC_SH1107
+# define OLED_COM_PIN_COUNT 128
+# else
+# error Invalid OLED_IC value
+# endif
+#endif
+
+#ifndef OLED_COM_PIN_OFFSET
+# define OLED_COM_PIN_OFFSET 0
+#endif
+
+// i2c defines
+#define I2C_CMD 0x00
+#define I2C_DATA 0x40
+#if defined(__AVR__)
+# define I2C_TRANSMIT_P(data) i2c_transmit_P((OLED_DISPLAY_ADDRESS << 1), &data[0], sizeof(data), OLED_I2C_TIMEOUT)
+#else // defined(__AVR__)
+# define I2C_TRANSMIT_P(data) i2c_transmit((OLED_DISPLAY_ADDRESS << 1), &data[0], sizeof(data), OLED_I2C_TIMEOUT)
+#endif // defined(__AVR__)
+#define I2C_TRANSMIT(data) i2c_transmit((OLED_DISPLAY_ADDRESS << 1), &data[0], sizeof(data), OLED_I2C_TIMEOUT)
+#define I2C_WRITE_REG(mode, data, size) i2c_writeReg((OLED_DISPLAY_ADDRESS << 1), mode, data, size, OLED_I2C_TIMEOUT)
+
+#define HAS_FLAGS(bits, flags) ((bits & flags) == flags)
+
+// Display buffer's is the same as the OLED memory layout
+// this is so we don't end up with rounding errors with
+// parts of the display unusable or don't get cleared correctly
+// and also allows for drawing & inverting
+uint8_t oled_buffer[OLED_MATRIX_SIZE];
+uint8_t * oled_cursor;
+OLED_BLOCK_TYPE oled_dirty = 0;
+bool oled_initialized = false;
+bool oled_active = false;
+bool oled_scrolling = false;
+bool oled_inverted = false;
+uint8_t oled_brightness = OLED_BRIGHTNESS;
+oled_rotation_t oled_rotation = 0;
+uint8_t oled_rotation_width = 0;
+uint8_t oled_scroll_speed = 0; // this holds the speed after being remapped to ssd1306 internal values
+uint8_t oled_scroll_start = 0;
+uint8_t oled_scroll_end = 7;
+#if OLED_TIMEOUT > 0
+uint32_t oled_timeout;
+#endif
+#if OLED_SCROLL_TIMEOUT > 0
+uint32_t oled_scroll_timeout;
+#endif
+#if OLED_UPDATE_INTERVAL > 0
+uint16_t oled_update_timeout;
+#endif
+
+// Internal variables to reduce math instructions
+
+#if defined(__AVR__)
+// identical to i2c_transmit, but for PROGMEM since all initialization is in PROGMEM arrays currently
+// probably should move this into i2c_master...
+static i2c_status_t i2c_transmit_P(uint8_t address, const uint8_t *data, uint16_t length, uint16_t timeout) {
+ i2c_status_t status = i2c_start(address | I2C_WRITE, timeout);
+
+ for (uint16_t i = 0; i < length && status >= 0; i++) {
+ status = i2c_write(pgm_read_byte((const char *)data++), timeout);
+ if (status) break;
+ }
+
+ i2c_stop();
+
+ return status;
+}
+#endif
+
+// Flips the rendering bits for a character at the current cursor position
+static void InvertCharacter(uint8_t *cursor) {
+ const uint8_t *end = cursor + OLED_FONT_WIDTH;
+ while (cursor < end) {
+ *cursor = ~(*cursor);
+ cursor++;
+ }
+}
+
+bool oled_init(oled_rotation_t rotation) {
+#if defined(USE_I2C) && defined(SPLIT_KEYBOARD)
+ if (!is_keyboard_master()) {
+ return true;
+ }
+#endif
+
+ oled_rotation = oled_init_user(oled_init_kb(rotation));
+ if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_90)) {
+ oled_rotation_width = OLED_DISPLAY_WIDTH;
+ } else {
+ oled_rotation_width = OLED_DISPLAY_HEIGHT;
+ }
+ i2c_init();
+
+ static const uint8_t PROGMEM display_setup1[] = {
+ I2C_CMD,
+ DISPLAY_OFF,
+ DISPLAY_CLOCK,
+ 0x80,
+ MULTIPLEX_RATIO,
+#if OLED_IC_COM_PINS_ARE_COLUMNS
+ OLED_DISPLAY_WIDTH - 1,
+#else
+ OLED_DISPLAY_HEIGHT - 1,
+#endif
+ DISPLAY_OFFSET,
+ 0x00,
+ DISPLAY_START_LINE | 0x00,
+ CHARGE_PUMP,
+ 0x14,
+#if (OLED_IC != OLED_IC_SH1106)
+ // MEMORY_MODE is unsupported on SH1106 (Page Addressing only)
+ MEMORY_MODE,
+ 0x00, // Horizontal addressing mode
+#elif OLED_IC == OLED_IC_SH1107
+ // Page addressing mode
+ SH1107_MEMORY_MODE_PAGE,
+#endif
+ };
+ if (I2C_TRANSMIT_P(display_setup1) != I2C_STATUS_SUCCESS) {
+ print("oled_init cmd set 1 failed\n");
+ return false;
+ }
+
+ if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_180)) {
+ static const uint8_t PROGMEM display_normal[] = {
+ I2C_CMD, SEGMENT_REMAP_INV, COM_SCAN_DEC, DISPLAY_OFFSET, OLED_COM_PIN_OFFSET,
+ };
+ if (I2C_TRANSMIT_P(display_normal) != I2C_STATUS_SUCCESS) {
+ print("oled_init cmd normal rotation failed\n");
+ return false;
+ }
+ } else {
+ static const uint8_t PROGMEM display_flipped[] = {
+ I2C_CMD, SEGMENT_REMAP, COM_SCAN_INC, DISPLAY_OFFSET, (OLED_COM_PIN_COUNT - OLED_COM_PIN_OFFSET) % OLED_COM_PIN_COUNT,
+ };
+ if (I2C_TRANSMIT_P(display_flipped) != I2C_STATUS_SUCCESS) {
+ print("display_flipped failed\n");
+ return false;
+ }
+ }
+
+ static const uint8_t PROGMEM display_setup2[] = {I2C_CMD, COM_PINS, OLED_COM_PINS, CONTRAST, OLED_BRIGHTNESS, PRE_CHARGE_PERIOD, 0x22, VCOM_DETECT, 0x35, DISPLAY_ALL_ON_RESUME, NORMAL_DISPLAY, DEACTIVATE_SCROLL, DISPLAY_ON}; if (I2C_TRANSMIT_P(display_setup2) != I2C_STATUS_SUCCESS) {
+ print("display_setup2 failed\n");
+ return false;
+ }
+
+#if OLED_TIMEOUT > 0
+ oled_timeout = timer_read32() + OLED_TIMEOUT;
+#endif
+#if OLED_SCROLL_TIMEOUT > 0
+ oled_scroll_timeout = timer_read32() + OLED_SCROLL_TIMEOUT;
+#endif
+
+ oled_clear();
+ oled_initialized = true;
+ oled_active = true;
+ oled_scrolling = false;
+ return true;
+}
+
+__attribute__((weak)) oled_rotation_t oled_init_kb(oled_rotation_t rotation) { return rotation; }
+__attribute__((weak)) oled_rotation_t oled_init_user(oled_rotation_t rotation) { return rotation; }
+
+void oled_clear(void) {
+ memset(oled_buffer, 0, sizeof(oled_buffer));
+ oled_cursor = &oled_buffer[0];
+ oled_dirty = OLED_ALL_BLOCKS_MASK;
+}
+
+static void calc_bounds(uint8_t update_start, uint8_t *cmd_array) {
+ // Calculate commands to set memory addressing bounds.
+ uint8_t start_page = OLED_BLOCK_SIZE * update_start / OLED_DISPLAY_WIDTH;
+ uint8_t start_column = OLED_BLOCK_SIZE * update_start % OLED_DISPLAY_WIDTH;
+#if !OLED_IC_HAS_HORIZONTAL_MODE
+ // Commands for Page Addressing Mode. Sets starting page and column; has no end bound.
+ // Column value must be split into high and low nybble and sent as two commands.
+ cmd_array[0] = PAM_PAGE_ADDR | start_page;
+ cmd_array[1] = PAM_SETCOLUMN_LSB | ((OLED_COLUMN_OFFSET + start_column) & 0x0f);
+ cmd_array[2] = PAM_SETCOLUMN_MSB | ((OLED_COLUMN_OFFSET + start_column) >> 4 & 0x0f);
+ cmd_array[3] = NOP;
+ cmd_array[4] = NOP;
+ cmd_array[5] = NOP;
+#else
+ // Commands for use in Horizontal Addressing mode.
+ cmd_array[1] = start_column + OLED_COLUMN_OFFSET;
+ cmd_array[4] = start_page;
+ cmd_array[2] = (OLED_BLOCK_SIZE + OLED_DISPLAY_WIDTH - 1) % OLED_DISPLAY_WIDTH + cmd_array[1];
+ cmd_array[5] = (OLED_BLOCK_SIZE + OLED_DISPLAY_WIDTH - 1) / OLED_DISPLAY_WIDTH - 1 + cmd_array[4];
+#endif
+}
+
+static void calc_bounds_90(uint8_t update_start, uint8_t *cmd_array) {
+ // Block numbering starts from the bottom left corner, going up and then to
+ // the right. The controller needs the page and column numbers for the top
+ // left and bottom right corners of that block.
+
+ // Total number of pages across the screen height.
+ const uint8_t height_in_pages = OLED_DISPLAY_HEIGHT / 8;
+
+ // Difference of starting page numbers for adjacent blocks; may be 0 if
+ // blocks are large enough to occupy one or more whole 8px columns.
+ const uint8_t page_inc_per_block = OLED_BLOCK_SIZE % OLED_DISPLAY_HEIGHT / 8;
+
+ // Top page number for a block which is at the bottom edge of the screen.
+ const uint8_t bottom_block_top_page = (height_in_pages - page_inc_per_block) % height_in_pages;
+
+#if !OLED_IC_HAS_HORIZONTAL_MODE
+ // Only the Page Addressing Mode is supported
+ uint8_t start_page = bottom_block_top_page - (OLED_BLOCK_SIZE * update_start % OLED_DISPLAY_HEIGHT / 8);
+ uint8_t start_column = OLED_BLOCK_SIZE * update_start / OLED_DISPLAY_HEIGHT * 8;
+ cmd_array[0] = PAM_PAGE_ADDR | start_page;
+ cmd_array[1] = PAM_SETCOLUMN_LSB | ((OLED_COLUMN_OFFSET + start_column) & 0x0f);
+ cmd_array[2] = PAM_SETCOLUMN_MSB | ((OLED_COLUMN_OFFSET + start_column) >> 4 & 0x0f);
+#else
+ cmd_array[1] = OLED_BLOCK_SIZE * update_start / OLED_DISPLAY_HEIGHT * 8 + OLED_COLUMN_OFFSET;
+ cmd_array[4] = bottom_block_top_page - (OLED_BLOCK_SIZE * update_start % OLED_DISPLAY_HEIGHT / 8);
+ cmd_array[2] = (OLED_BLOCK_SIZE + OLED_DISPLAY_HEIGHT - 1) / OLED_DISPLAY_HEIGHT * 8 - 1 + cmd_array[1];
+ cmd_array[5] = (OLED_BLOCK_SIZE + OLED_DISPLAY_HEIGHT - 1) % OLED_DISPLAY_HEIGHT / 8 + cmd_array[4];
+#endif
+}
+
+uint8_t crot(uint8_t a, int8_t n) {
+ const uint8_t mask = 0x7;
+ n &= mask;
+ return a << n | a >> (-n & mask);
+}
+
+static void rotate_90(const uint8_t *src, uint8_t *dest) {
+ for (uint8_t i = 0, shift = 7; i < 8; ++i, --shift) {
+ uint8_t selector = (1 << i);
+ for (uint8_t j = 0; j < 8; ++j) {
+ dest[i] |= crot(src[j] & selector, shift - (int8_t)j);
+ }
+ }
+}
+
+void oled_render(void) {
+ if (!oled_initialized) {
+ return;
+ }
+
+ // Do we have work to do?
+ oled_dirty &= OLED_ALL_BLOCKS_MASK;
+ if (!oled_dirty || oled_scrolling) {
+ return;
+ }
+
+ // Find first dirty block
+ uint8_t update_start = 0;
+ while (!(oled_dirty & ((OLED_BLOCK_TYPE)1 << update_start))) {
+ ++update_start;
+ }
+
+ // Set column & page position
+#if OLED_IC_HAS_HORIZONTAL_MODE
+ static uint8_t display_start[] = {I2C_CMD, COLUMN_ADDR, 0, OLED_DISPLAY_WIDTH - 1, PAGE_ADDR, 0, OLED_DISPLAY_HEIGHT / 8 - 1};
+#else
+ static uint8_t display_start[] = {I2C_CMD, PAM_PAGE_ADDR, PAM_SETCOLUMN_LSB, PAM_SETCOLUMN_MSB};
+#endif
+ if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_90)) {
+ calc_bounds(update_start, &display_start[1]); // Offset from I2C_CMD byte at the start
+ } else {
+ calc_bounds_90(update_start, &display_start[1]); // Offset from I2C_CMD byte at the start
+ }
+
+ // Send column & page position
+ if (I2C_TRANSMIT(display_start) != I2C_STATUS_SUCCESS) {
+ print("oled_render offset command failed\n");
+ return;
+ }
+
+ if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_90)) {
+ // Send render data chunk as is
+ if (I2C_WRITE_REG(I2C_DATA, &oled_buffer[OLED_BLOCK_SIZE * update_start], OLED_BLOCK_SIZE) != I2C_STATUS_SUCCESS) {
+ print("oled_render data failed\n");
+ return;
+ }
+ } else {
+ // Rotate the render chunks
+ const static uint8_t source_map[] = OLED_SOURCE_MAP;
+ const static uint8_t target_map[] = OLED_TARGET_MAP;
+
+ static uint8_t temp_buffer[OLED_BLOCK_SIZE];
+ memset(temp_buffer, 0, sizeof(temp_buffer));
+ for (uint8_t i = 0; i < sizeof(source_map); ++i) {
+ rotate_90(&oled_buffer[OLED_BLOCK_SIZE * update_start + source_map[i]], &temp_buffer[target_map[i]]);
+ }
+
+#if OLED_IC_HAS_HORIZONTAL_MODE
+ // Send render data chunk after rotating
+ if (I2C_WRITE_REG(I2C_DATA, &temp_buffer[0], OLED_BLOCK_SIZE) != I2C_STATUS_SUCCESS) {
+ print("oled_render90 data failed\n");
+ return;
+ }
+#else
+ // For SH1106 or SH1107 the data chunk must be split into separate pieces for each page
+ const uint8_t columns_in_block = (OLED_BLOCK_SIZE + OLED_DISPLAY_HEIGHT - 1) / OLED_DISPLAY_HEIGHT * 8;
+ const uint8_t num_pages = OLED_BLOCK_SIZE / columns_in_block;
+ for (uint8_t i = 0; i < num_pages; ++i) {
+ // Send column & page position for all pages except the first one
+ if (i > 0) {
+ display_start[1]++;
+ if (I2C_TRANSMIT(display_start) != I2C_STATUS_SUCCESS) {
+ print("oled_render offset command failed\n");
+ return;
+ }
+ }
+ // Send data for the page
+ if (I2C_WRITE_REG(I2C_DATA, &temp_buffer[columns_in_block * i], columns_in_block) != I2C_STATUS_SUCCESS) {
+ print("oled_render90 data failed\n");
+ return;
+ }
+ }
+#endif
+ }
+
+ // Turn on display if it is off
+ oled_on();
+
+ // Clear dirty flag
+ oled_dirty &= ~((OLED_BLOCK_TYPE)1 << update_start);
+}
+
+void oled_set_cursor(uint8_t col, uint8_t line) {
+ uint16_t index = line * oled_rotation_width + col * OLED_FONT_WIDTH;
+
+ // Out of bounds?
+ if (index >= OLED_MATRIX_SIZE) {
+ index = 0;
+ }
+
+ oled_cursor = &oled_buffer[index];
+}
+
+void oled_advance_page(bool clearPageRemainder) {
+ uint16_t index = oled_cursor - &oled_buffer[0];
+ uint8_t remaining = oled_rotation_width - (index % oled_rotation_width);
+
+ if (clearPageRemainder) {
+ // Remaining Char count
+ remaining = remaining / OLED_FONT_WIDTH;
+
+ // Write empty character until next line
+ while (remaining--) oled_write_char(' ', false);
+ } else {
+ // Next page index out of bounds?
+ if (index + remaining >= OLED_MATRIX_SIZE) {
+ index = 0;
+ remaining = 0;
+ }
+
+ oled_cursor = &oled_buffer[index + remaining];
+ }
+}
+
+void oled_advance_char(void) {
+ uint16_t nextIndex = oled_cursor - &oled_buffer[0] + OLED_FONT_WIDTH;
+ uint8_t remainingSpace = oled_rotation_width - (nextIndex % oled_rotation_width);
+
+ // Do we have enough space on the current line for the next character
+ if (remainingSpace < OLED_FONT_WIDTH) {
+ nextIndex += remainingSpace;
+ }
+
+ // Did we go out of bounds
+ if (nextIndex >= OLED_MATRIX_SIZE) {
+ nextIndex = 0;
+ }
+
+ // Update cursor position
+ oled_cursor = &oled_buffer[nextIndex];
+}
+
+// Main handler that writes character data to the display buffer
+void oled_write_char(const char data, bool invert) {
+ // Advance to the next line if newline
+ if (data == '\n') {
+ // Old source wrote ' ' until end of line...
+ oled_advance_page(true);
+ return;
+ }
+
+ if (data == '\r') {
+ oled_advance_page(false);
+ return;
+ }
+
+ // copy the current render buffer to check for dirty after
+ static uint8_t oled_temp_buffer[OLED_FONT_WIDTH];
+ memcpy(&oled_temp_buffer, oled_cursor, OLED_FONT_WIDTH);
+
+ _Static_assert(sizeof(font) >= ((OLED_FONT_END + 1 - OLED_FONT_START) * OLED_FONT_WIDTH), "OLED_FONT_END references outside array");
+
+ // set the reder buffer data
+ uint8_t cast_data = (uint8_t)data; // font based on unsigned type for index
+ if (cast_data < OLED_FONT_START || cast_data > OLED_FONT_END) {
+ memset(oled_cursor, 0x00, OLED_FONT_WIDTH);
+ } else {
+ const uint8_t *glyph = &font[(cast_data - OLED_FONT_START) * OLED_FONT_WIDTH];
+ memcpy_P(oled_cursor, glyph, OLED_FONT_WIDTH);
+ }
+
+ // Invert if needed
+ if (invert) {
+ InvertCharacter(oled_cursor);
+ }
+
+ // Dirty check
+ if (memcmp(&oled_temp_buffer, oled_cursor, OLED_FONT_WIDTH)) {
+ uint16_t index = oled_cursor - &oled_buffer[0];
+ oled_dirty |= ((OLED_BLOCK_TYPE)1 << (index / OLED_BLOCK_SIZE));
+ // Edgecase check if the written data spans the 2 chunks
+ oled_dirty |= ((OLED_BLOCK_TYPE)1 << ((index + OLED_FONT_WIDTH - 1) / OLED_BLOCK_SIZE));
+ }
+
+ // Finally move to the next char
+ oled_advance_char();
+}
+
+void oled_write(const char *data, bool invert) {
+ const char *end = data + strlen(data);
+ while (data < end) {
+ oled_write_char(*data, invert);
+ data++;
+ }
+}
+
+void oled_write_ln(const char *data, bool invert) {
+ oled_write(data, invert);
+ oled_advance_page(true);
+}
+
+void oled_pan(bool left) {
+ uint16_t i = 0;
+ for (uint16_t y = 0; y < OLED_DISPLAY_HEIGHT / 8; y++) {
+ if (left) {
+ for (uint16_t x = 0; x < OLED_DISPLAY_WIDTH - 1; x++) {
+ i = y * OLED_DISPLAY_WIDTH + x;
+ oled_buffer[i] = oled_buffer[i + 1];
+ }
+ } else {
+ for (uint16_t x = OLED_DISPLAY_WIDTH - 1; x > 0; x--) {
+ i = y * OLED_DISPLAY_WIDTH + x;
+ oled_buffer[i] = oled_buffer[i - 1];
+ }
+ }
+ }
+ oled_dirty = OLED_ALL_BLOCKS_MASK;
+}
+
+oled_buffer_reader_t oled_read_raw(uint16_t start_index) {
+ if (start_index > OLED_MATRIX_SIZE) start_index = OLED_MATRIX_SIZE;
+ oled_buffer_reader_t ret_reader;
+ ret_reader.current_element = &oled_buffer[start_index];
+ ret_reader.remaining_element_count = OLED_MATRIX_SIZE - start_index;
+ return ret_reader;
+}
+
+void oled_write_raw_byte(const char data, uint16_t index) {
+ if (index > OLED_MATRIX_SIZE) index = OLED_MATRIX_SIZE;
+ if (oled_buffer[index] == data) return;
+ oled_buffer[index] = data;
+ oled_dirty |= ((OLED_BLOCK_TYPE)1 << (index / OLED_BLOCK_SIZE));
+}
+
+void oled_write_raw(const char *data, uint16_t size) {
+ uint16_t cursor_start_index = oled_cursor - &oled_buffer[0];
+ if ((size + cursor_start_index) > OLED_MATRIX_SIZE) size = OLED_MATRIX_SIZE - cursor_start_index;
+ for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
+ uint8_t c = *data++;
+ if (oled_buffer[i] == c) continue;
+ oled_buffer[i] = c;
+ oled_dirty |= ((OLED_BLOCK_TYPE)1 << (i / OLED_BLOCK_SIZE));
+ }
+}
+
+void oled_write_pixel(uint8_t x, uint8_t y, bool on) {
+ if (x >= oled_rotation_width) {
+ return;
+ }
+ uint16_t index = x + (y / 8) * oled_rotation_width;
+ if (index >= OLED_MATRIX_SIZE) {
+ return;
+ }
+ uint8_t data = oled_buffer[index];
+ if (on) {
+ data |= (1 << (y % 8));
+ } else {
+ data &= ~(1 << (y % 8));
+ }
+ if (oled_buffer[index] != data) {
+ oled_buffer[index] = data;
+ oled_dirty |= ((OLED_BLOCK_TYPE)1 << (index / OLED_BLOCK_SIZE));
+ }
+}
+
+#if defined(__AVR__)
+void oled_write_P(const char *data, bool invert) {
+ uint8_t c = pgm_read_byte(data);
+ while (c != 0) {
+ oled_write_char(c, invert);
+ c = pgm_read_byte(++data);
+ }
+}
+
+void oled_write_ln_P(const char *data, bool invert) {
+ oled_write_P(data, invert);
+ oled_advance_page(true);
+}
+
+void oled_write_raw_P(const char *data, uint16_t size) {
+ uint16_t cursor_start_index = oled_cursor - &oled_buffer[0];
+ if ((size + cursor_start_index) > OLED_MATRIX_SIZE) size = OLED_MATRIX_SIZE - cursor_start_index;
+ for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
+ uint8_t c = pgm_read_byte(data++);
+ if (oled_buffer[i] == c) continue;
+ oled_buffer[i] = c;
+ oled_dirty |= ((OLED_BLOCK_TYPE)1 << (i / OLED_BLOCK_SIZE));
+ }
+}
+#endif // defined(__AVR__)
+
+bool oled_on(void) {
+ if (!oled_initialized) {
+ return oled_active;
+ }
+
+#if OLED_TIMEOUT > 0
+ oled_timeout = timer_read32() + OLED_TIMEOUT;
+#endif
+
+ static const uint8_t PROGMEM display_on[] =
+#ifdef OLED_FADE_OUT
+ {I2C_CMD, FADE_BLINK, 0x00};
+#else
+ {I2C_CMD, DISPLAY_ON};
+#endif
+
+ if (!oled_active) {
+ if (I2C_TRANSMIT_P(display_on) != I2C_STATUS_SUCCESS) {
+ print("oled_on cmd failed\n");
+ return oled_active;
+ }
+ oled_active = true;
+ }
+ return oled_active;
+}
+
+bool oled_off(void) {
+ if (!oled_initialized) {
+ return !oled_active;
+ }
+
+ static const uint8_t PROGMEM display_off[] =
+#ifdef OLED_FADE_OUT
+ {I2C_CMD, FADE_BLINK, ENABLE_FADE | OLED_FADE_OUT_INTERVAL};
+#else
+ {I2C_CMD, DISPLAY_OFF};
+#endif
+
+ if (oled_active) {
+ if (I2C_TRANSMIT_P(display_off) != I2C_STATUS_SUCCESS) {
+ print("oled_off cmd failed\n");
+ return oled_active;
+ }
+ oled_active = false;
+ }
+ return !oled_active;
+}
+
+bool is_oled_on(void) { return oled_active; }
+
+uint8_t oled_set_brightness(uint8_t level) {
+ if (!oled_initialized) {
+ return oled_brightness;
+ }
+
+ uint8_t set_contrast[] = {I2C_CMD, CONTRAST, level};
+ if (oled_brightness != level) {
+ if (I2C_TRANSMIT(set_contrast) != I2C_STATUS_SUCCESS) {
+ print("set_brightness cmd failed\n");
+ return oled_brightness;
+ }
+ oled_brightness = level;
+ }
+ return oled_brightness;
+}
+
+uint8_t oled_get_brightness(void) { return oled_brightness; }
+
+// Set the specific 8 lines rows of the screen to scroll.
+// 0 is the default for start, and 7 for end, which is the entire
+// height of the screen. For 128x32 screens, rows 4-7 are not used.
+void oled_scroll_set_area(uint8_t start_line, uint8_t end_line) {
+ oled_scroll_start = start_line;
+ oled_scroll_end = end_line;
+}
+
+void oled_scroll_set_speed(uint8_t speed) {
+ // Sets the speed for scrolling... does not take effect
+ // until scrolling is either started or restarted
+ // the ssd1306 supports 8 speeds
+ // FrameRate2 speed = 7
+ // FrameRate3 speed = 4
+ // FrameRate4 speed = 5
+ // FrameRate5 speed = 0
+ // FrameRate25 speed = 6
+ // FrameRate64 speed = 1
+ // FrameRate128 speed = 2
+ // FrameRate256 speed = 3
+ // for ease of use these are remaped here to be in order
+ static const uint8_t scroll_remap[8] = {7, 4, 5, 0, 6, 1, 2, 3};
+ oled_scroll_speed = scroll_remap[speed];
+}
+
+bool oled_scroll_right(void) {
+ if (!oled_initialized) {
+ return oled_scrolling;
+ }
+
+ // Dont enable scrolling if we need to update the display
+ // This prevents scrolling of bad data from starting the scroll too early after init
+ if (!oled_dirty && !oled_scrolling) {
+ uint8_t display_scroll_right[] = {I2C_CMD, SCROLL_RIGHT, 0x00, oled_scroll_start, oled_scroll_speed, oled_scroll_end, 0x00, 0xFF, ACTIVATE_SCROLL};
+ if (I2C_TRANSMIT(display_scroll_right) != I2C_STATUS_SUCCESS) {
+ print("oled_scroll_right cmd failed\n");
+ return oled_scrolling;
+ }
+ oled_scrolling = true;
+ }
+ return oled_scrolling;
+}
+
+bool oled_scroll_left(void) {
+ if (!oled_initialized) {
+ return oled_scrolling;
+ }
+
+ // Dont enable scrolling if we need to update the display
+ // This prevents scrolling of bad data from starting the scroll too early after init
+ if (!oled_dirty && !oled_scrolling) {
+ uint8_t display_scroll_left[] = {I2C_CMD, SCROLL_LEFT, 0x00, oled_scroll_start, oled_scroll_speed, oled_scroll_end, 0x00, 0xFF, ACTIVATE_SCROLL};
+ if (I2C_TRANSMIT(display_scroll_left) != I2C_STATUS_SUCCESS) {
+ print("oled_scroll_left cmd failed\n");
+ return oled_scrolling;
+ }
+ oled_scrolling = true;
+ }
+ return oled_scrolling;
+}
+
+bool oled_scroll_off(void) {
+ if (!oled_initialized) {
+ return !oled_scrolling;
+ }
+
+ if (oled_scrolling) {
+ static const uint8_t PROGMEM display_scroll_off[] = {I2C_CMD, DEACTIVATE_SCROLL};
+ if (I2C_TRANSMIT_P(display_scroll_off) != I2C_STATUS_SUCCESS) {
+ print("oled_scroll_off cmd failed\n");
+ return oled_scrolling;
+ }
+ oled_scrolling = false;
+ oled_dirty = OLED_ALL_BLOCKS_MASK;
+ }
+ return !oled_scrolling;
+}
+
+bool is_oled_scrolling(void) { return oled_scrolling; }
+
+bool oled_invert(bool invert) {
+ if (!oled_initialized) {
+ return oled_inverted;
+ }
+
+ if (invert && !oled_inverted) {
+ static const uint8_t PROGMEM display_inverted[] = {I2C_CMD, INVERT_DISPLAY};
+ if (I2C_TRANSMIT_P(display_inverted) != I2C_STATUS_SUCCESS) {
+ print("oled_invert cmd failed\n");
+ return oled_inverted;
+ }
+ oled_inverted = true;
+ } else if (!invert && oled_inverted) {
+ static const uint8_t PROGMEM display_normal[] = {I2C_CMD, NORMAL_DISPLAY};
+ if (I2C_TRANSMIT_P(display_normal) != I2C_STATUS_SUCCESS) {
+ print("oled_invert cmd failed\n");
+ return oled_inverted;
+ }
+ oled_inverted = false;
+ }
+
+ return oled_inverted;
+}
+
+uint8_t oled_max_chars(void) {
+ if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_90)) {
+ return OLED_DISPLAY_WIDTH / OLED_FONT_WIDTH;
+ }
+ return OLED_DISPLAY_HEIGHT / OLED_FONT_WIDTH;
+}
+
+uint8_t oled_max_lines(void) {
+ if (!HAS_FLAGS(oled_rotation, OLED_ROTATION_90)) {
+ return OLED_DISPLAY_HEIGHT / OLED_FONT_HEIGHT;
+ }
+ return OLED_DISPLAY_WIDTH / OLED_FONT_HEIGHT;
+}
+
+void oled_task(void) {
+ if (!oled_initialized) {
+ return;
+ }
+
+#if OLED_UPDATE_INTERVAL > 0
+ if (timer_elapsed(oled_update_timeout) >= OLED_UPDATE_INTERVAL) {
+ oled_update_timeout = timer_read();
+ oled_set_cursor(0, 0);
+ oled_task_kb();
+ }
+#else
+ oled_set_cursor(0, 0);
+ oled_task_kb();
+#endif
+
+#if OLED_SCROLL_TIMEOUT > 0
+ if (oled_dirty && oled_scrolling) {
+ oled_scroll_timeout = timer_read32() + OLED_SCROLL_TIMEOUT;
+ oled_scroll_off();
+ }
+#endif
+
+ // Smart render system, no need to check for dirty
+ oled_render();
+
+ // Display timeout check
+#if OLED_TIMEOUT > 0
+ if (oled_active && timer_expired32(timer_read32(), oled_timeout)) {
+ oled_off();
+ }
+#endif
+
+#if OLED_SCROLL_TIMEOUT > 0
+ if (!oled_scrolling && timer_expired32(timer_read32(), oled_scroll_timeout)) {
+# ifdef OLED_SCROLL_TIMEOUT_RIGHT
+ oled_scroll_right();
+# else
+ oled_scroll_left();
+# endif
+ }
+#endif
+}
+
+__attribute__((weak)) bool oled_task_kb(void) { return oled_task_user(); }
+__attribute__((weak)) bool oled_task_user(void) { return true; }