mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 21:48:13 +00:00
446 lines
12 KiB
C
446 lines
12 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/spi.h>
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#include <string.h>
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#include "memzero.h"
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#include "oled.h"
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#include "util.h"
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#define OLED_SETCONTRAST 0x81
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#define OLED_DISPLAYALLON_RESUME 0xA4
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#define OLED_DISPLAYALLON 0xA5
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#define OLED_NORMALDISPLAY 0xA6
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#define OLED_INVERTDISPLAY 0xA7
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#define OLED_DISPLAYOFF 0xAE
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#define OLED_DISPLAYON 0xAF
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#define OLED_SETDISPLAYOFFSET 0xD3
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#define OLED_SETCOMPINS 0xDA
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#define OLED_SETVCOMDETECT 0xDB
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#define OLED_SETDISPLAYCLOCKDIV 0xD5
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#define OLED_SETPRECHARGE 0xD9
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#define OLED_SETMULTIPLEX 0xA8
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#define OLED_SETLOWCOLUMN 0x00
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#define OLED_SETHIGHCOLUMN 0x10
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#define OLED_SETSTARTLINE 0x40
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#define OLED_MEMORYMODE 0x20
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#define OLED_COMSCANINC 0xC0
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#define OLED_COMSCANDEC 0xC8
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#define OLED_SEGREMAP 0xA0
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#define OLED_CHARGEPUMP 0x8D
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#define SPI_BASE SPI1
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#define OLED_DC_PORT GPIOB
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#define OLED_DC_PIN GPIO0 // PB0 | Data/Command
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#define OLED_CS_PORT GPIOA
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#define OLED_CS_PIN GPIO4 // PA4 | SPI Select
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#define OLED_RST_PORT GPIOB
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#define OLED_RST_PIN GPIO1 // PB1 | Reset display
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/* Trezor has a display of size OLED_WIDTH x OLED_HEIGHT (128x64).
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* The contents of this display are buffered in _oledbuffer. This is
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* an array of OLED_WIDTH * OLED_HEIGHT/8 bytes. At byte y*OLED_WIDTH + x
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* it stores the column of pixels from (x,8y) to (x,8y+7); the LSB stores
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* the top most pixel. The pixel (0,0) is the top left corner of the
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* display.
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*/
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static uint8_t _oledbuffer[OLED_BUFSIZE];
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static bool is_debug_link = 0;
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/*
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* macros to convert coordinate to bit position
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*/
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#define OLED_OFFSET(x, y) (OLED_BUFSIZE - 1 - (x) - ((y) / 8) * OLED_WIDTH)
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#define OLED_MASK(x, y) (1 << (7 - (y) % 8))
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/*
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* Return the state of the pixel at x, y
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*/
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bool oledGetPixel(int x, int y) {
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return _oledbuffer[OLED_OFFSET(x, y)] & OLED_MASK(x, y);
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}
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/*
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* Draws a white pixel at x, y
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*/
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void oledDrawPixel(int x, int y) {
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if ((x < 0) || (y < 0) || (x >= OLED_WIDTH) || (y >= OLED_HEIGHT)) {
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return;
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}
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_oledbuffer[OLED_OFFSET(x, y)] |= OLED_MASK(x, y);
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}
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/*
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* Clears pixel at x, y
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*/
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void oledClearPixel(int x, int y) {
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if ((x < 0) || (y < 0) || (x >= OLED_WIDTH) || (y >= OLED_HEIGHT)) {
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return;
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}
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_oledbuffer[OLED_OFFSET(x, y)] &= ~OLED_MASK(x, y);
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}
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/*
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* Inverts pixel at x, y
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*/
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void oledInvertPixel(int x, int y) {
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if ((x < 0) || (y < 0) || (x >= OLED_WIDTH) || (y >= OLED_HEIGHT)) {
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return;
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}
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_oledbuffer[OLED_OFFSET(x, y)] ^= OLED_MASK(x, y);
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}
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#if !EMULATOR
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/*
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* Send a block of data via the SPI bus.
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*/
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static inline void SPISend(uint32_t base, const uint8_t *data, int len) {
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delay(1);
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for (int i = 0; i < len; i++) {
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spi_send(base, data[i]);
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}
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while (!(SPI_SR(base) & SPI_SR_TXE))
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;
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while ((SPI_SR(base) & SPI_SR_BSY))
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;
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}
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/*
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* Initialize the display.
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*/
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void oledInit() {
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static const uint8_t s[25] = {OLED_DISPLAYOFF,
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OLED_SETDISPLAYCLOCKDIV,
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0x80,
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OLED_SETMULTIPLEX,
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0x3F, // 128x64
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OLED_SETDISPLAYOFFSET,
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0x00,
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OLED_SETSTARTLINE | 0x00,
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OLED_CHARGEPUMP,
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0x14,
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OLED_MEMORYMODE,
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0x00,
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OLED_SEGREMAP | 0x01,
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OLED_COMSCANDEC,
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OLED_SETCOMPINS,
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0x12, // 128x64
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OLED_SETCONTRAST,
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0xCF,
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OLED_SETPRECHARGE,
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0xF1,
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OLED_SETVCOMDETECT,
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0x40,
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OLED_DISPLAYALLON_RESUME,
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OLED_NORMALDISPLAY,
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OLED_DISPLAYON};
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gpio_clear(OLED_DC_PORT, OLED_DC_PIN); // set to CMD
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gpio_set(OLED_CS_PORT, OLED_CS_PIN); // SPI deselect
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// Reset the LCD
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gpio_set(OLED_RST_PORT, OLED_RST_PIN);
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delay(40);
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gpio_clear(OLED_RST_PORT, OLED_RST_PIN);
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delay(400);
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gpio_set(OLED_RST_PORT, OLED_RST_PIN);
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// init
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gpio_clear(OLED_CS_PORT, OLED_CS_PIN); // SPI select
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SPISend(SPI_BASE, s, 25);
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gpio_set(OLED_CS_PORT, OLED_CS_PIN); // SPI deselect
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oledClear();
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oledRefresh();
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}
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#endif
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/*
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* Clears the display buffer (sets all pixels to black)
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*/
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void oledClear() { memzero(_oledbuffer, sizeof(_oledbuffer)); }
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void oledInvertDebugLink() {
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if (is_debug_link) {
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oledInvertPixel(OLED_WIDTH - 5, 0);
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oledInvertPixel(OLED_WIDTH - 4, 0);
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oledInvertPixel(OLED_WIDTH - 3, 0);
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oledInvertPixel(OLED_WIDTH - 2, 0);
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oledInvertPixel(OLED_WIDTH - 1, 0);
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oledInvertPixel(OLED_WIDTH - 4, 1);
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oledInvertPixel(OLED_WIDTH - 3, 1);
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oledInvertPixel(OLED_WIDTH - 2, 1);
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oledInvertPixel(OLED_WIDTH - 1, 1);
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oledInvertPixel(OLED_WIDTH - 3, 2);
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oledInvertPixel(OLED_WIDTH - 2, 2);
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oledInvertPixel(OLED_WIDTH - 1, 2);
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oledInvertPixel(OLED_WIDTH - 2, 3);
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oledInvertPixel(OLED_WIDTH - 1, 3);
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oledInvertPixel(OLED_WIDTH - 1, 4);
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}
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}
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/*
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* Refresh the display. This copies the buffer to the display to show the
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* contents. This must be called after every operation to the buffer to
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* make the change visible. All other operations only change the buffer
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* not the content of the display.
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*/
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#if !EMULATOR
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void oledRefresh() {
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static const uint8_t s[3] = {OLED_SETLOWCOLUMN | 0x00,
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OLED_SETHIGHCOLUMN | 0x00,
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OLED_SETSTARTLINE | 0x00};
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// draw triangle in upper right corner
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oledInvertDebugLink();
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gpio_clear(OLED_CS_PORT, OLED_CS_PIN); // SPI select
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SPISend(SPI_BASE, s, 3);
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gpio_set(OLED_CS_PORT, OLED_CS_PIN); // SPI deselect
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gpio_set(OLED_DC_PORT, OLED_DC_PIN); // set to DATA
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gpio_clear(OLED_CS_PORT, OLED_CS_PIN); // SPI select
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SPISend(SPI_BASE, _oledbuffer, sizeof(_oledbuffer));
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gpio_set(OLED_CS_PORT, OLED_CS_PIN); // SPI deselect
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gpio_clear(OLED_DC_PORT, OLED_DC_PIN); // set to CMD
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// return it back
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oledInvertDebugLink();
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}
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#endif
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const uint8_t *oledGetBuffer() { return _oledbuffer; }
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void oledSetDebugLink(bool set) {
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is_debug_link = set;
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oledRefresh();
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}
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void oledSetBuffer(uint8_t *buf) {
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memcpy(_oledbuffer, buf, sizeof(_oledbuffer));
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}
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void oledDrawChar(int x, int y, char c, int font) {
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if (x >= OLED_WIDTH || y >= OLED_HEIGHT || y <= -FONT_HEIGHT) {
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return;
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}
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int zoom = (font & FONT_DOUBLE) ? 2 : 1;
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int char_width = fontCharWidth(font & 0x7f, c);
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const uint8_t *char_data = fontCharData(font & 0x7f, c);
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if (x <= -char_width) {
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return;
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}
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for (int xo = 0; xo < char_width; xo++) {
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for (int yo = 0; yo < FONT_HEIGHT; yo++) {
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if (char_data[xo] & (1 << (FONT_HEIGHT - 1 - yo))) {
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if (zoom <= 1) {
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oledDrawPixel(x + xo, y + yo);
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} else {
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oledBox(x + xo, y + yo * zoom, x + (xo + 1) - 1,
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y + (yo + 1) * zoom - 1, true);
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}
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}
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}
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}
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}
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char oledConvertChar(const char c) {
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uint8_t a = c;
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if (a < 0x80) return c;
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// UTF-8 handling: https://en.wikipedia.org/wiki/UTF-8#Description
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// bytes 11xxxxxx are first byte of UTF-8 characters
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// bytes 10xxxxxx are successive UTF-8 characters
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if (a >= 0xC0) return '_';
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return 0;
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}
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int oledStringWidth(const char *text, int font) {
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if (!text) return 0;
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int space = (font & FONT_DOUBLE) ? 2 : 1;
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int l = 0;
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for (; *text; text++) {
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char c = oledConvertChar(*text);
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if (c) {
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l += fontCharWidth(font & 0x7f, c) + space;
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}
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}
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return l;
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}
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void oledDrawString(int x, int y, const char *text, int font) {
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if (!text) return;
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int l = 0;
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int space = (font & FONT_DOUBLE) ? 2 : 1;
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for (; *text; text++) {
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char c = oledConvertChar(*text);
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if (c) {
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oledDrawChar(x + l, y, c, font);
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l += fontCharWidth(font & 0x7f, c) + space;
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}
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}
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}
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void oledDrawStringCenter(int x, int y, const char *text, int font) {
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x = x - oledStringWidth(text, font) / 2;
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oledDrawString(x, y, text, font);
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}
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void oledDrawStringRight(int x, int y, const char *text, int font) {
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x -= oledStringWidth(text, font);
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oledDrawString(x, y, text, font);
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}
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void oledDrawBitmap(int x, int y, const BITMAP *bmp) {
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for (int i = 0; i < bmp->width; i++) {
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for (int j = 0; j < bmp->height; j++) {
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if (bmp->data[(i / 8) + j * bmp->width / 8] & (1 << (7 - i % 8))) {
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oledDrawPixel(x + i, y + j);
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} else {
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oledClearPixel(x + i, y + j);
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}
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}
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}
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}
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/*
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* Inverts box between (x1,y1) and (x2,y2) inclusive.
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*/
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void oledInvert(int x1, int y1, int x2, int y2) {
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x1 = MAX(x1, 0);
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y1 = MAX(y1, 0);
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x2 = MIN(x2, OLED_WIDTH - 1);
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y2 = MIN(y2, OLED_HEIGHT - 1);
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for (int x = x1; x <= x2; x++) {
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for (int y = y1; y <= y2; y++) {
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oledInvertPixel(x, y);
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}
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}
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}
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/*
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* Draw a filled rectangle.
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*/
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void oledBox(int x1, int y1, int x2, int y2, bool set) {
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x1 = MAX(x1, 0);
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y1 = MAX(y1, 0);
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x2 = MIN(x2, OLED_WIDTH - 1);
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y2 = MIN(y2, OLED_HEIGHT - 1);
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for (int x = x1; x <= x2; x++) {
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for (int y = y1; y <= y2; y++) {
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set ? oledDrawPixel(x, y) : oledClearPixel(x, y);
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}
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}
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}
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void oledHLine(int y) {
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if (y < 0 || y >= OLED_HEIGHT) {
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return;
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}
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for (int x = 0; x < OLED_WIDTH; x++) {
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oledDrawPixel(x, y);
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}
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}
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/*
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* Draw a rectangle frame.
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*/
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void oledFrame(int x1, int y1, int x2, int y2) {
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for (int x = x1; x <= x2; x++) {
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oledDrawPixel(x, y1);
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oledDrawPixel(x, y2);
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}
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for (int y = y1 + 1; y < y2; y++) {
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oledDrawPixel(x1, y);
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oledDrawPixel(x2, y);
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}
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}
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/*
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* Animates the display, swiping the current contents out to the left.
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* This clears the display.
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*/
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void oledSwipeLeft(void) {
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for (int i = 0; i < OLED_WIDTH; i++) {
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for (int j = 0; j < OLED_HEIGHT / 8; j++) {
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for (int k = OLED_WIDTH - 1; k > 0; k--) {
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_oledbuffer[j * OLED_WIDTH + k] = _oledbuffer[j * OLED_WIDTH + k - 1];
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}
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_oledbuffer[j * OLED_WIDTH] = 0;
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}
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oledRefresh();
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}
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}
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/*
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* Animates the display, swiping the current contents out to the right.
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* This clears the display.
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*/
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void oledSwipeRight(void) {
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for (int i = 0; i < OLED_WIDTH / 4; i++) {
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for (int j = 0; j < OLED_HEIGHT / 8; j++) {
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for (int k = 0; k < OLED_WIDTH / 4 - 1; k++) {
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_oledbuffer[k * 4 + 0 + j * OLED_WIDTH] =
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_oledbuffer[k * 4 + 4 + j * OLED_WIDTH];
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_oledbuffer[k * 4 + 1 + j * OLED_WIDTH] =
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_oledbuffer[k * 4 + 5 + j * OLED_WIDTH];
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_oledbuffer[k * 4 + 2 + j * OLED_WIDTH] =
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_oledbuffer[k * 4 + 6 + j * OLED_WIDTH];
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_oledbuffer[k * 4 + 3 + j * OLED_WIDTH] =
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_oledbuffer[k * 4 + 7 + j * OLED_WIDTH];
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}
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_oledbuffer[j * OLED_WIDTH + OLED_WIDTH - 1] = 0;
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_oledbuffer[j * OLED_WIDTH + OLED_WIDTH - 2] = 0;
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_oledbuffer[j * OLED_WIDTH + OLED_WIDTH - 3] = 0;
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_oledbuffer[j * OLED_WIDTH + OLED_WIDTH - 4] = 0;
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}
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oledRefresh();
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}
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}
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/*
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* Mitigate SCA on lines y1-y2 by setting at least width pixels white
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*/
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void oledSCA(int y1, int y2, int width) {
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y1 = MAX(y1, 0);
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y2 = MIN(y2, OLED_HEIGHT - 1);
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for (int y = y1; y <= y2; y++) {
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int pix = 0;
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for (int x = 0; x < OLED_WIDTH; x++) {
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pix += oledGetPixel(x, y);
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}
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if (width > pix) {
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pix = width - pix;
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for (int x = 0; x < pix / 2; x++) {
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oledDrawPixel(x, y);
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}
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for (int x = OLED_WIDTH - ((pix + 1) / 2); x < OLED_WIDTH; x++) {
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oledDrawPixel(x, y);
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}
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}
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}
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}
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