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245 lines
8.2 KiB
245 lines
8.2 KiB
/*
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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) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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 program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include STM32_HAL_H
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#define OLED_BUFSIZE (DISPLAY_RESX * DISPLAY_RESY / 8)
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#define OLED_OFFSET(x, y) (OLED_BUFSIZE - 1 - (x) - ((y) / 8) * DISPLAY_RESX)
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#define OLED_MASK(x, y) (1 << (7 - (y) % 8))
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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 OLED_DC_PORT GPIOB
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#define OLED_DC_PIN GPIO_PIN_0 // PB0 | Data/Command
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#define OLED_CS_PORT GPIOA
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#define OLED_CS_PIN GPIO_PIN_4 // PA4 | SPI Select
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#define OLED_RST_PORT GPIOB
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#define OLED_RST_PIN GPIO_PIN_1 // PB1 | Reset display
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static uint8_t OLED_BUFFER[OLED_BUFSIZE];
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static struct {
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struct {
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uint16_t x, y;
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} start;
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struct {
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uint16_t x, y;
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} end;
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struct {
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uint16_t x, y;
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} pos;
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} PIXELWINDOW;
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void PIXELDATA(uint16_t c) {
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if (PIXELWINDOW.pos.x <= PIXELWINDOW.end.x &&
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PIXELWINDOW.pos.y <= PIXELWINDOW.end.y) {
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// set to white if highest bits of all R, G, B values are set to 1
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// bin(10000 100000 10000) = hex(0x8410)
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// otherwise set to black
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if (c & 0x8410) {
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OLED_BUFFER[OLED_OFFSET(PIXELWINDOW.pos.x, PIXELWINDOW.pos.y)] |=
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OLED_MASK(PIXELWINDOW.pos.x, PIXELWINDOW.pos.y);
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} else {
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OLED_BUFFER[OLED_OFFSET(PIXELWINDOW.pos.x, PIXELWINDOW.pos.y)] &=
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~OLED_MASK(PIXELWINDOW.pos.x, PIXELWINDOW.pos.y);
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}
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}
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PIXELWINDOW.pos.x++;
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if (PIXELWINDOW.pos.x > PIXELWINDOW.end.x) {
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PIXELWINDOW.pos.x = PIXELWINDOW.start.x;
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PIXELWINDOW.pos.y++;
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}
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}
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static void display_set_window(uint16_t x0, uint16_t y0, uint16_t x1,
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uint16_t y1) {
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PIXELWINDOW.start.x = x0;
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PIXELWINDOW.start.y = y0;
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PIXELWINDOW.end.x = x1;
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PIXELWINDOW.end.y = y1;
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PIXELWINDOW.pos.x = x0;
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PIXELWINDOW.pos.y = y0;
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}
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static void display_set_orientation(int degrees) { display_refresh(); }
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static void display_set_backlight(int val) {}
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SPI_HandleTypeDef spi_handle;
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static inline void spi_send(const uint8_t *data, int len) {
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HAL_Delay(1);
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if (HAL_OK != HAL_SPI_Transmit(&spi_handle, (uint8_t *)data, len, 1000)) {
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// TODO: error
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return;
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}
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while (HAL_SPI_STATE_READY != HAL_SPI_GetState(&spi_handle)) {
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}
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}
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void display_init(void) {
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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__HAL_RCC_SPI1_CLK_ENABLE();
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GPIO_InitTypeDef GPIO_InitStructure;
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// set GPIO for OLED display
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GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStructure.Alternate = 0;
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GPIO_InitStructure.Pin = GPIO_PIN_4;
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HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);
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HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = GPIO_PIN_0 | GPIO_PIN_4;
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HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0 | GPIO_PIN_4, GPIO_PIN_RESET);
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HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
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// enable SPI 1 for OLED display
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GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStructure.Alternate = GPIO_AF5_SPI1;
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GPIO_InitStructure.Pin = GPIO_PIN_5 | GPIO_PIN_7;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStructure);
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spi_handle.Instance = SPI1;
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spi_handle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
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spi_handle.Init.Direction = SPI_DIRECTION_2LINES;
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spi_handle.Init.CLKPhase = SPI_PHASE_1EDGE;
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spi_handle.Init.CLKPolarity = SPI_POLARITY_LOW;
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spi_handle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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spi_handle.Init.CRCPolynomial = 7;
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spi_handle.Init.DataSize = SPI_DATASIZE_8BIT;
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spi_handle.Init.FirstBit = SPI_FIRSTBIT_MSB;
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spi_handle.Init.NSS = SPI_NSS_HARD_OUTPUT;
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spi_handle.Init.TIMode = SPI_TIMODE_DISABLE;
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spi_handle.Init.Mode = SPI_MODE_MASTER;
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if (HAL_OK != HAL_SPI_Init(&spi_handle)) {
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// TODO: error
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return;
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}
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// initialize display
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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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HAL_GPIO_WritePin(OLED_DC_PORT, OLED_DC_PIN, GPIO_PIN_RESET); // set to CMD
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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_SET); // SPI deselect
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// Reset the LCD
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HAL_GPIO_WritePin(OLED_RST_PORT, OLED_RST_PIN, GPIO_PIN_SET);
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HAL_Delay(40);
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HAL_GPIO_WritePin(OLED_RST_PORT, OLED_RST_PIN, GPIO_PIN_RESET);
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HAL_Delay(400);
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HAL_GPIO_WritePin(OLED_RST_PORT, OLED_RST_PIN, GPIO_PIN_SET);
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// init
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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_RESET); // SPI select
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spi_send(s, 25);
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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_SET); // SPI deselect
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display_clear();
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display_refresh();
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}
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static inline uint8_t reverse_byte(uint8_t b) {
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b = (b & 0xF0) >> 4 | (b & 0x0F) << 4;
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b = (b & 0xCC) >> 2 | (b & 0x33) << 2;
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b = (b & 0xAA) >> 1 | (b & 0x55) << 1;
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return b;
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}
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static void rotate_oled_buffer(void) {
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for (int i = 0; i < OLED_BUFSIZE / 2; i++) {
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uint8_t b = OLED_BUFFER[i];
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OLED_BUFFER[i] = reverse_byte(OLED_BUFFER[OLED_BUFSIZE - i]);
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OLED_BUFFER[OLED_BUFSIZE - i] = reverse_byte(b);
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}
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}
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void display_refresh(void) {
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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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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_RESET); // SPI select
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spi_send(s, 3);
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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_SET); // SPI deselect
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HAL_GPIO_WritePin(OLED_DC_PORT, OLED_DC_PIN, GPIO_PIN_SET); // set to DATA
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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_RESET); // SPI select
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if (DISPLAY_ORIENTATION == 180) { // rotate buffer if needed
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rotate_oled_buffer();
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}
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spi_send(OLED_BUFFER, OLED_BUFSIZE);
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if (DISPLAY_ORIENTATION == 180) { // rotate buffer back to original position
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rotate_oled_buffer();
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}
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HAL_GPIO_WritePin(OLED_CS_PORT, OLED_CS_PIN, GPIO_PIN_SET); // SPI deselect
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HAL_GPIO_WritePin(OLED_DC_PORT, OLED_DC_PIN, GPIO_PIN_RESET); // set to CMD
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}
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const char *display_save(const char *prefix) { return NULL; }
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