mirror of
https://github.com/firewalkwithm3/qmk_firmware.git
synced 2024-11-23 03:50:28 +08:00
497 lines
15 KiB
C
497 lines
15 KiB
C
/*
|
|
Copyright 2021
|
|
|
|
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 "st7565.h"
|
|
|
|
#include <string.h>
|
|
|
|
#include "keyboard.h"
|
|
#include "progmem.h"
|
|
#include "timer.h"
|
|
#include "wait.h"
|
|
|
|
#include ST7565_FONT_H
|
|
|
|
// 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
|
|
|
|
// Addressing Setting Commands
|
|
#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 COM_SCAN_INC 0xC0
|
|
#define COM_SCAN_DEC 0xC8
|
|
#define LCD_BIAS_7 0xA3
|
|
#define LCD_BIAS_9 0xA2
|
|
#define RESISTOR_RATIO 0x20
|
|
#define POWER_CONTROL 0x28
|
|
|
|
// Misc defines
|
|
#ifndef ST7565_BLOCK_COUNT
|
|
# define ST7565_BLOCK_COUNT (sizeof(ST7565_BLOCK_TYPE) * 8)
|
|
#endif
|
|
#ifndef ST7565_BLOCK_SIZE
|
|
# define ST7565_BLOCK_SIZE (ST7565_MATRIX_SIZE / ST7565_BLOCK_COUNT)
|
|
#endif
|
|
|
|
#define ST7565_ALL_BLOCKS_MASK (((((ST7565_BLOCK_TYPE)1 << (ST7565_BLOCK_COUNT - 1)) - 1) << 1) | 1)
|
|
|
|
#define HAS_FLAGS(bits, flags) ((bits & flags) == flags)
|
|
|
|
// Display buffer's is the same as the display 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 st7565_buffer[ST7565_MATRIX_SIZE];
|
|
uint8_t * st7565_cursor;
|
|
ST7565_BLOCK_TYPE st7565_dirty = 0;
|
|
bool st7565_initialized = false;
|
|
bool st7565_active = false;
|
|
bool st7565_inverted = false;
|
|
display_rotation_t st7565_rotation = DISPLAY_ROTATION_0;
|
|
#if ST7565_TIMEOUT > 0
|
|
uint32_t st7565_timeout;
|
|
#endif
|
|
#if ST7565_UPDATE_INTERVAL > 0
|
|
uint16_t st7565_update_timeout;
|
|
#endif
|
|
|
|
// Flips the rendering bits for a character at the current cursor position
|
|
static void InvertCharacter(uint8_t *cursor) {
|
|
const uint8_t *end = cursor + ST7565_FONT_WIDTH;
|
|
while (cursor < end) {
|
|
*cursor = ~(*cursor);
|
|
cursor++;
|
|
}
|
|
}
|
|
|
|
bool st7565_init(display_rotation_t rotation) {
|
|
setPinOutput(ST7565_A0_PIN);
|
|
writePinHigh(ST7565_A0_PIN);
|
|
setPinOutput(ST7565_RST_PIN);
|
|
writePinHigh(ST7565_RST_PIN);
|
|
|
|
st7565_rotation = st7565_init_user(rotation);
|
|
|
|
spi_init();
|
|
spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
|
|
|
|
st7565_reset();
|
|
|
|
st7565_send_cmd(LCD_BIAS_7);
|
|
if (!HAS_FLAGS(st7565_rotation, DISPLAY_ROTATION_180)) {
|
|
st7565_send_cmd(SEGMENT_REMAP);
|
|
st7565_send_cmd(COM_SCAN_DEC);
|
|
} else {
|
|
st7565_send_cmd(SEGMENT_REMAP_INV);
|
|
st7565_send_cmd(COM_SCAN_INC);
|
|
}
|
|
st7565_send_cmd(DISPLAY_START_LINE | 0x00);
|
|
st7565_send_cmd(CONTRAST);
|
|
st7565_send_cmd(ST7565_CONTRAST);
|
|
st7565_send_cmd(RESISTOR_RATIO | 0x01);
|
|
st7565_send_cmd(POWER_CONTROL | 0x04);
|
|
wait_ms(50);
|
|
st7565_send_cmd(POWER_CONTROL | 0x06);
|
|
wait_ms(50);
|
|
st7565_send_cmd(POWER_CONTROL | 0x07);
|
|
wait_ms(10);
|
|
st7565_send_cmd(DISPLAY_ON);
|
|
st7565_send_cmd(DISPLAY_ALL_ON_RESUME);
|
|
st7565_send_cmd(NORMAL_DISPLAY);
|
|
|
|
spi_stop();
|
|
|
|
#if ST7565_TIMEOUT > 0
|
|
st7565_timeout = timer_read32() + ST7565_TIMEOUT;
|
|
#endif
|
|
|
|
st7565_clear();
|
|
st7565_initialized = true;
|
|
st7565_active = true;
|
|
return true;
|
|
}
|
|
|
|
__attribute__((weak)) display_rotation_t st7565_init_user(display_rotation_t rotation) { return rotation; }
|
|
|
|
void st7565_clear(void) {
|
|
memset(st7565_buffer, 0, sizeof(st7565_buffer));
|
|
st7565_cursor = &st7565_buffer[0];
|
|
st7565_dirty = ST7565_ALL_BLOCKS_MASK;
|
|
}
|
|
|
|
uint8_t crot(uint8_t a, int8_t n) {
|
|
const uint8_t mask = 0x7;
|
|
n &= mask;
|
|
return a << n | a >> (-n & mask);
|
|
}
|
|
|
|
void st7565_render(void) {
|
|
if (!st7565_initialized) {
|
|
return;
|
|
}
|
|
|
|
// Do we have work to do?
|
|
st7565_dirty &= ST7565_ALL_BLOCKS_MASK;
|
|
if (!st7565_dirty) {
|
|
return;
|
|
}
|
|
|
|
// Find first dirty block
|
|
uint8_t update_start = 0;
|
|
while (!(st7565_dirty & ((ST7565_BLOCK_TYPE)1 << update_start))) {
|
|
++update_start;
|
|
}
|
|
|
|
// Calculate commands to set memory addressing bounds.
|
|
uint8_t start_page = ST7565_BLOCK_SIZE * update_start / ST7565_DISPLAY_WIDTH;
|
|
uint8_t start_column = ST7565_BLOCK_SIZE * update_start % ST7565_DISPLAY_WIDTH;
|
|
// IC has 132 segment drivers, for panels with less width we need to offset the starting column
|
|
if (HAS_FLAGS(st7565_rotation, DISPLAY_ROTATION_180)) {
|
|
start_column += (132 - ST7565_DISPLAY_WIDTH);
|
|
}
|
|
|
|
spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
|
|
|
|
st7565_send_cmd(PAM_PAGE_ADDR | start_page);
|
|
st7565_send_cmd(PAM_SETCOLUMN_LSB | ((ST7565_COLUMN_OFFSET + start_column) & 0x0f));
|
|
st7565_send_cmd(PAM_SETCOLUMN_MSB | ((ST7565_COLUMN_OFFSET + start_column) >> 4 & 0x0f));
|
|
|
|
st7565_send_data(&st7565_buffer[ST7565_BLOCK_SIZE * update_start], ST7565_BLOCK_SIZE);
|
|
|
|
// Turn on display if it is off
|
|
st7565_on();
|
|
|
|
// Clear dirty flag
|
|
st7565_dirty &= ~((ST7565_BLOCK_TYPE)1 << update_start);
|
|
}
|
|
|
|
void st7565_set_cursor(uint8_t col, uint8_t line) {
|
|
uint16_t index = line * ST7565_DISPLAY_WIDTH + col * ST7565_FONT_WIDTH;
|
|
|
|
// Out of bounds?
|
|
if (index >= ST7565_MATRIX_SIZE) {
|
|
index = 0;
|
|
}
|
|
|
|
st7565_cursor = &st7565_buffer[index];
|
|
}
|
|
|
|
void st7565_advance_page(bool clearPageRemainder) {
|
|
uint16_t index = st7565_cursor - &st7565_buffer[0];
|
|
uint8_t remaining = ST7565_DISPLAY_WIDTH - (index % ST7565_DISPLAY_WIDTH);
|
|
|
|
if (clearPageRemainder) {
|
|
// Remaining Char count
|
|
remaining = remaining / ST7565_FONT_WIDTH;
|
|
|
|
// Write empty character until next line
|
|
while (remaining--) st7565_write_char(' ', false);
|
|
} else {
|
|
// Next page index out of bounds?
|
|
if (index + remaining >= ST7565_MATRIX_SIZE) {
|
|
index = 0;
|
|
remaining = 0;
|
|
}
|
|
|
|
st7565_cursor = &st7565_buffer[index + remaining];
|
|
}
|
|
}
|
|
|
|
void st7565_advance_char(void) {
|
|
uint16_t nextIndex = st7565_cursor - &st7565_buffer[0] + ST7565_FONT_WIDTH;
|
|
uint8_t remainingSpace = ST7565_DISPLAY_WIDTH - (nextIndex % ST7565_DISPLAY_WIDTH);
|
|
|
|
// Do we have enough space on the current line for the next character
|
|
if (remainingSpace < ST7565_FONT_WIDTH) {
|
|
nextIndex += remainingSpace;
|
|
}
|
|
|
|
// Did we go out of bounds
|
|
if (nextIndex >= ST7565_MATRIX_SIZE) {
|
|
nextIndex = 0;
|
|
}
|
|
|
|
// Update cursor position
|
|
st7565_cursor = &st7565_buffer[nextIndex];
|
|
}
|
|
|
|
// Main handler that writes character data to the display buffer
|
|
void st7565_write_char(const char data, bool invert) {
|
|
// Advance to the next line if newline
|
|
if (data == '\n') {
|
|
// Old source wrote ' ' until end of line...
|
|
st7565_advance_page(true);
|
|
return;
|
|
}
|
|
|
|
if (data == '\r') {
|
|
st7565_advance_page(false);
|
|
return;
|
|
}
|
|
|
|
// copy the current render buffer to check for dirty after
|
|
static uint8_t st7565_temp_buffer[ST7565_FONT_WIDTH];
|
|
memcpy(&st7565_temp_buffer, st7565_cursor, ST7565_FONT_WIDTH);
|
|
|
|
_Static_assert(sizeof(font) >= ((ST7565_FONT_END + 1 - ST7565_FONT_START) * ST7565_FONT_WIDTH), "ST7565_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 < ST7565_FONT_START || cast_data > ST7565_FONT_END) {
|
|
memset(st7565_cursor, 0x00, ST7565_FONT_WIDTH);
|
|
} else {
|
|
const uint8_t *glyph = &font[(cast_data - ST7565_FONT_START) * ST7565_FONT_WIDTH];
|
|
memcpy_P(st7565_cursor, glyph, ST7565_FONT_WIDTH);
|
|
}
|
|
|
|
// Invert if needed
|
|
if (invert) {
|
|
InvertCharacter(st7565_cursor);
|
|
}
|
|
|
|
// Dirty check
|
|
if (memcmp(&st7565_temp_buffer, st7565_cursor, ST7565_FONT_WIDTH)) {
|
|
uint16_t index = st7565_cursor - &st7565_buffer[0];
|
|
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
|
|
// Edgecase check if the written data spans the 2 chunks
|
|
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << ((index + ST7565_FONT_WIDTH - 1) / ST7565_BLOCK_SIZE));
|
|
}
|
|
|
|
// Finally move to the next char
|
|
st7565_advance_char();
|
|
}
|
|
|
|
void st7565_write(const char *data, bool invert) {
|
|
const char *end = data + strlen(data);
|
|
while (data < end) {
|
|
st7565_write_char(*data, invert);
|
|
data++;
|
|
}
|
|
}
|
|
|
|
void st7565_write_ln(const char *data, bool invert) {
|
|
st7565_write(data, invert);
|
|
st7565_advance_page(true);
|
|
}
|
|
|
|
void st7565_pan(bool left) {
|
|
uint16_t i = 0;
|
|
for (uint16_t y = 0; y < ST7565_DISPLAY_HEIGHT / 8; y++) {
|
|
if (left) {
|
|
for (uint16_t x = 0; x < ST7565_DISPLAY_WIDTH - 1; x++) {
|
|
i = y * ST7565_DISPLAY_WIDTH + x;
|
|
st7565_buffer[i] = st7565_buffer[i + 1];
|
|
}
|
|
} else {
|
|
for (uint16_t x = ST7565_DISPLAY_WIDTH - 1; x > 0; x--) {
|
|
i = y * ST7565_DISPLAY_WIDTH + x;
|
|
st7565_buffer[i] = st7565_buffer[i - 1];
|
|
}
|
|
}
|
|
}
|
|
st7565_dirty = ST7565_ALL_BLOCKS_MASK;
|
|
}
|
|
|
|
display_buffer_reader_t st7565_read_raw(uint16_t start_index) {
|
|
if (start_index > ST7565_MATRIX_SIZE) start_index = ST7565_MATRIX_SIZE;
|
|
display_buffer_reader_t ret_reader;
|
|
ret_reader.current_element = &st7565_buffer[start_index];
|
|
ret_reader.remaining_element_count = ST7565_MATRIX_SIZE - start_index;
|
|
return ret_reader;
|
|
}
|
|
|
|
void st7565_write_raw_byte(const char data, uint16_t index) {
|
|
if (index > ST7565_MATRIX_SIZE) index = ST7565_MATRIX_SIZE;
|
|
if (st7565_buffer[index] == data) return;
|
|
st7565_buffer[index] = data;
|
|
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
|
|
}
|
|
|
|
void st7565_write_raw(const char *data, uint16_t size) {
|
|
uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
|
|
if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_MATRIX_SIZE - cursor_start_index;
|
|
for (uint16_t i = cursor_start_index; i < cursor_start_index + size; i++) {
|
|
uint8_t c = *data++;
|
|
if (st7565_buffer[i] == c) continue;
|
|
st7565_buffer[i] = c;
|
|
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
|
|
}
|
|
}
|
|
|
|
void st7565_write_pixel(uint8_t x, uint8_t y, bool on) {
|
|
if (x >= ST7565_DISPLAY_WIDTH) {
|
|
return;
|
|
}
|
|
uint16_t index = x + (y / 8) * ST7565_DISPLAY_WIDTH;
|
|
if (index >= ST7565_MATRIX_SIZE) {
|
|
return;
|
|
}
|
|
uint8_t data = st7565_buffer[index];
|
|
if (on) {
|
|
data |= (1 << (y % 8));
|
|
} else {
|
|
data &= ~(1 << (y % 8));
|
|
}
|
|
if (st7565_buffer[index] != data) {
|
|
st7565_buffer[index] = data;
|
|
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (index / ST7565_BLOCK_SIZE));
|
|
}
|
|
}
|
|
|
|
#if defined(__AVR__)
|
|
void st7565_write_P(const char *data, bool invert) {
|
|
uint8_t c = pgm_read_byte(data);
|
|
while (c != 0) {
|
|
st7565_write_char(c, invert);
|
|
c = pgm_read_byte(++data);
|
|
}
|
|
}
|
|
|
|
void st7565_write_ln_P(const char *data, bool invert) {
|
|
st7565_write_P(data, invert);
|
|
st7565_advance_page(true);
|
|
}
|
|
|
|
void st7565_write_raw_P(const char *data, uint16_t size) {
|
|
uint16_t cursor_start_index = st7565_cursor - &st7565_buffer[0];
|
|
if ((size + cursor_start_index) > ST7565_MATRIX_SIZE) size = ST7565_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 (st7565_buffer[i] == c) continue;
|
|
st7565_buffer[i] = c;
|
|
st7565_dirty |= ((ST7565_BLOCK_TYPE)1 << (i / ST7565_BLOCK_SIZE));
|
|
}
|
|
}
|
|
#endif // defined(__AVR__)
|
|
|
|
bool st7565_on(void) {
|
|
if (!st7565_initialized) {
|
|
return st7565_active;
|
|
}
|
|
|
|
#if ST7565_TIMEOUT > 0
|
|
st7565_timeout = timer_read32() + ST7565_TIMEOUT;
|
|
#endif
|
|
|
|
if (!st7565_active) {
|
|
spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
|
|
st7565_send_cmd(DISPLAY_ON);
|
|
spi_stop();
|
|
st7565_active = true;
|
|
st7565_on_user();
|
|
}
|
|
return st7565_active;
|
|
}
|
|
|
|
__attribute__((weak)) void st7565_on_user(void) {}
|
|
|
|
bool st7565_off(void) {
|
|
if (!st7565_initialized) {
|
|
return !st7565_active;
|
|
}
|
|
|
|
if (st7565_active) {
|
|
spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
|
|
st7565_send_cmd(DISPLAY_OFF);
|
|
spi_stop();
|
|
st7565_active = false;
|
|
st7565_off_user();
|
|
}
|
|
return !st7565_active;
|
|
}
|
|
|
|
__attribute__((weak)) void st7565_off_user(void) {}
|
|
|
|
bool st7565_is_on(void) { return st7565_active; }
|
|
|
|
bool st7565_invert(bool invert) {
|
|
if (!st7565_initialized) {
|
|
return st7565_inverted;
|
|
}
|
|
|
|
if (invert != st7565_inverted) {
|
|
spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR);
|
|
st7565_send_cmd(invert ? INVERT_DISPLAY : NORMAL_DISPLAY);
|
|
spi_stop();
|
|
st7565_inverted = invert;
|
|
}
|
|
return st7565_inverted;
|
|
}
|
|
|
|
uint8_t st7565_max_chars(void) { return ST7565_DISPLAY_WIDTH / ST7565_FONT_WIDTH; }
|
|
|
|
uint8_t st7565_max_lines(void) { return ST7565_DISPLAY_HEIGHT / ST7565_FONT_HEIGHT; }
|
|
|
|
void st7565_task(void) {
|
|
if (!st7565_initialized) {
|
|
return;
|
|
}
|
|
|
|
#if ST7565_UPDATE_INTERVAL > 0
|
|
if (timer_elapsed(st7565_update_timeout) >= ST7565_UPDATE_INTERVAL) {
|
|
st7565_update_timeout = timer_read();
|
|
st7565_set_cursor(0, 0);
|
|
st7565_task_user();
|
|
}
|
|
#else
|
|
st7565_set_cursor(0, 0);
|
|
st7565_task_user();
|
|
#endif
|
|
|
|
// Smart render system, no need to check for dirty
|
|
st7565_render();
|
|
|
|
// Display timeout check
|
|
#if ST7565_TIMEOUT > 0
|
|
if (st7565_active && timer_expired32(timer_read32(), st7565_timeout)) {
|
|
st7565_off();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
__attribute__((weak)) void st7565_task_user(void) {}
|
|
|
|
void st7565_reset(void) {
|
|
writePinLow(ST7565_RST_PIN);
|
|
wait_ms(20);
|
|
writePinHigh(ST7565_RST_PIN);
|
|
wait_ms(20);
|
|
}
|
|
|
|
spi_status_t st7565_send_cmd(uint8_t cmd) {
|
|
writePinLow(ST7565_A0_PIN);
|
|
return spi_write(cmd);
|
|
}
|
|
|
|
spi_status_t st7565_send_data(uint8_t *data, uint16_t length) {
|
|
writePinHigh(ST7565_A0_PIN);
|
|
return spi_transmit(data, length);
|
|
}
|