diff options
Diffstat (limited to 'dogs.c')
| -rw-r--r-- | dogs.c | 165 |
1 files changed, 165 insertions, 0 deletions
@@ -0,0 +1,165 @@ +/** + * dogs.c - Interface for drawing to the EADOGS102N-6 display. + * Copyright (C) 2020 Clyne Sullivan + * + * 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 3 of the License, or + * (at your option) any later version. + * See the GNU General Public License for more details. + */ + +#include "ch.h" +#include "dogs.h" +#include "hal.h" + +#define SET_DATA palSetPad(GPIOC, 15) +#define SET_CMD palClearPad(GPIOC, 15) +#define CS_HIGH palSetPad(GPIOA, 4) +#define CS_LOW palClearPad(GPIOA, 4) + +unsigned char dogs_buffer[DISP_WIDTH * DISP_HEIGHT / 8]; + +static void dogs_init_display(); + +void dogs_init() +{ + // SPI + palSetPadMode(GPIOB, 1, PAL_MODE_ALTERNATE(1)); // MOSI + palSetPadMode(GPIOA, 5, PAL_MODE_ALTERNATE(0)); // CLK + palSetPadMode(GPIOA, 4, PAL_MODE_OUTPUT_PUSHPULL); // nCS + palSetPadMode(GPIOC, 14, PAL_MODE_OUTPUT_PUSHPULL); // nRST + palSetPadMode(GPIOC, 15, PAL_MODE_OUTPUT_PUSHPULL); // CD + + palSetPad(GPIOA, 4); + palSetPad(GPIOC, 14); + palClearPad(GPIOC, 15); + + static const SPIConfig ls_spicfg = { + false, + NULL, + SPI_CR1_BR_2 | SPI_CR1_BR_1, + 0 + }; + spiStart(&SPID1, &ls_spicfg); + + dogs_init_display(); + dogs_clear(); +} + +void dogs_write_data(unsigned char byte) +{ + SET_DATA; + spiSend(&SPID1, 1, &byte); +} +void dogs_write_cmd(unsigned char byte) +{ + SET_CMD; + spiSend(&SPID1, 1, &byte); +} + +void dogs_set_column(unsigned int col) +{ + //if (col < DISP_WIDTH) { + dogs_write_cmd(0x10 | ((col >> 4) & 0xF)); + dogs_write_cmd(0x00 | (col & 0xF)); + //} +} +void dogs_set_power(unsigned int bits) +{ + dogs_write_cmd(0x28 | (bits & 0x7)); +} +void dogs_set_scroll_line(unsigned int startline) +{ + dogs_write_cmd(0x40 | (startline & 0x3F)); +} +void dogs_set_page(unsigned int page) +{ + dogs_write_cmd(0xB0 | (page & 0xF)); +} +void dogs_set_vlcd_ratio(unsigned int ratio) +{ + dogs_write_cmd(0x20 | (ratio & 0x7)); +} +void dogs_set_contrast(unsigned int value) +{ + dogs_write_cmd(0x81); + dogs_write_cmd(0x00 | (value & 0x3F)); +} +void dogs_set_pixelson(bool on) +{ + dogs_write_cmd(on ? 0xA5 : 0xA4); +} +void dogs_set_invert(bool invert) +{ + dogs_write_cmd(invert ? 0xA7 : 0xA6); +} +void dogs_set_sleep(bool sleep) +{ + dogs_write_cmd(sleep ? 0xAE : 0xAF); +} +void dogs_set_segdir(bool normal) +{ + dogs_write_cmd(normal ? 0xA0 : 0xA1); +} +void dogs_set_comdir(bool normal) +{ + dogs_write_cmd(normal ? 0xC0 : 0xC8); +} +void dogs_reset() +{ + dogs_write_cmd(0xE2); +} +void dogs_set_bias(bool higher) +{ + dogs_write_cmd(higher ? 0xA2 : 0xA3); +} +void dogs_set_advanced(unsigned int bits) +{ + dogs_write_cmd(0xFA); + dogs_write_cmd(0x10 | bits); +} + +void dogs_init_display() +{ + CS_LOW; + dogs_reset(); + CS_HIGH; + chThdSleepMilliseconds(100); + CS_LOW; + dogs_set_scroll_line(0); + dogs_set_segdir(true); + dogs_set_comdir(false); + dogs_set_pixelson(false); + dogs_set_invert(false); + dogs_set_bias(true); + dogs_set_power(0x07); + dogs_set_vlcd_ratio(7); + dogs_set_contrast(0x10); + dogs_set_advanced(0x83); + dogs_set_sleep(false); + CS_HIGH; +} + +void dogs_clear() +{ + unsigned char *ptr = dogs_buffer; + for (unsigned int i = 0; i < sizeof(dogs_buffer); i++) { + *ptr++ = 0; + } + dogs_flush(); +} + +void dogs_flush() +{ + unsigned char *ptr = dogs_buffer; + CS_LOW; + for (int page = 0; page < 8; page++) { + dogs_set_page(page); + dogs_set_column(30); + for (int i = 0; i < 102; i++) + dogs_write_data(*ptr++); + } + CS_HIGH; +} + |