init
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ef0bb65fdf
3 changed files with 126 additions and 0 deletions
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.gitignore
vendored
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.gitignore
vendored
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.idea
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lib_sharp.c
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lib_sharp.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "hardware/gpio.h"
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#include "hardware/spi.h"
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#include "lib_sharp.h"
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sharp_display_t sharp_display_new(uint16_t width, uint16_t height, spi_inst_t * spi, uint8_t cs)
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{
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gpio_put(cs, false);
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sharp_display_t display = {
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.width = width,
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.height = height,
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.cs = cs,
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.vcom = CMD_VCOM,
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.framebuffer = (uint8_t *)malloc((width * height) / 8),
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.spi = (spi)
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};
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return display;
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}
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bool sharp_display_error(sharp_display_t * display)
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{
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return (display == NULL || display->framebuffer == NULL);
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}
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void sharp_display_refresh_screen(sharp_display_t * display)
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{
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gpio_put(display->cs, true);
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sharp_display_toggle_vcom(display);
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// These are sizes without the current line and end of line data
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uint16_t line_size = display->width / 8;
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uint16_t frame_size = (display->width * display->height) / 8;
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uint16_t buff_size = 1 + display->height * (1 + (display->width / 8) + 1) + 1;
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uint8_t buff[buff_size];
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uint16_t buff_offset = 0;
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buff[buff_offset] = display->vcom | CMD_WRITE;
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buff_offset += 1;
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for (int i = 0; i < frame_size; i += line_size)
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{
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// Current line
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buff[buff_offset] = ((i + 1) / (display->width / 8)) + 1;
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buff_offset += 1;
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// Line data
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memcpy(buff + buff_offset, display->framebuffer + i, line_size);
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buff_offset += line_size;
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// End of line
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buff[buff_offset] = 0x00;
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buff_offset += 1;
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}
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// End of transition
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buff[buff_offset] = 0x00;
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buff_offset += 1;
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if (buff_size != buff_offset)
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{
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printf("Sussy buffer size offset\n");
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}
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spi_write_blocking(display->spi, buff, buff_offset);
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gpio_put(display->cs, false);
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}
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void sharp_display_clear_screen(sharp_display_t * display)
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{
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sharp_display_clear_buffer(display);
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gpio_put(display->cs, true);
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uint8_t buff[2] = {display->vcom | CMD_CLEAR, 0x00};
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spi_write_blocking(display->spi, buff, 2);
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sharp_display_toggle_vcom(display);
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gpio_put(display->cs, false);
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}
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void sharp_display_clear_buffer(sharp_display_t * display)
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{
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memset(display->framebuffer, 0, display->width * display->height / 8);
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}
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void sharp_display_toggle_vcom(sharp_display_t * display)
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{
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display->vcom = display->vcom ? 0x00 : CMD_VCOM;
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}
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30
lib_sharp.h
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lib_sharp.h
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#ifndef LIB_SHARP_H
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#define LIB_SHARP_H
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#include "hardware/spi.h"
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#define CMD_WRITE 0x80
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#define CMD_CLEAR 0x20
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#define CMD_VCOM 0x40
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#define SWAP(a, b) { a ^= b; b ^= a; a ^= b; }
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typedef struct sharp_display {
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uint16_t width, height;
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uint8_t cs;
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uint8_t vcom;
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uint8_t * framebuffer;
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spi_inst_t * spi;
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} sharp_display_t;
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sharp_display_t sharp_display_new(uint16_t width, uint16_t height, spi_inst_t * spi, uint8_t cs);
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bool sharp_display_error(sharp_display_t * display);
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void sharp_display_refresh_screen(sharp_display_t * display);
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void sharp_display_clear_screen(sharp_display_t * display);
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void sharp_display_clear_buffer(sharp_display_t * display);
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void sharp_display_toggle_vcom(sharp_display_t * display);
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void sharp_display_draw_pixel(sharp_display_t *display, int x, int y, bool color);
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void sharp_display_draw_circle(sharp_display_t *display, int x0, int y0, int radius, bool color);
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#endif //LIB_SHARP_H
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