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0bb25bb9846012b1bf4f64e477f3b0f2a1558e6c
eink-api/eink_api.c
aeroreyna 0bb25bb984 adding custom fonts and editor mode with tab
2026-01-13 22:04:10 -05:00

410 lines
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#include "pico/stdlib.h"
#include "pico/multicore.h"
#include "pico/util/queue.h"
#include "hardware/timer.h"
// e-Paper library includes
#include "DEV_Config.h"
#include "GUI_Paint.h"
#include "fonts.h"
#include "EPD_4in2_V2.h"
#include "acme_5_outlines_font.h"
//Create a new image cache
UBYTE *BlackImage;
UBYTE *EditorImage;
queue_t q;
void process_command(char *cmd);
void core1_entry();
bool screen_on = false;
uint32_t screen_last_ts = 0;
int epaper_init()
{
printf("EPD_4IN2_V2_test Demo\r\n");
if(DEV_Module_Init()!=0){
return -1;
}
printf("e-Paper Init and Clear...\r\n");
EPD_4IN2_V2_Init();
EPD_4IN2_V2_Clear();
// DEV_Delay_ms(500);
/* you have to edit the startup_stm32fxxx.s file and set a big enough heap size */
UWORD Imagesize = ((EPD_4IN2_V2_WIDTH % 8 == 0)? (EPD_4IN2_V2_WIDTH / 8 ): (EPD_4IN2_V2_WIDTH / 8 + 1)) * EPD_4IN2_V2_HEIGHT;
if((BlackImage = (UBYTE *)malloc(Imagesize)) == NULL) {
printf("Failed to apply for black memory...\r\n");
return -1;
}
if((EditorImage = (UBYTE *)malloc(Imagesize)) == NULL) {
printf("Failed to apply for editor memory...\r\n");
return -1;
}
printf("Paint_NewImage\r\n");
Paint_NewImage(BlackImage, EPD_4IN2_V2_WIDTH, EPD_4IN2_V2_HEIGHT, 0, WHITE);
screen_on = true;
return 1;
}
void draw_sine_wave_line(int x_start, int y_center, int length, int amplitude, float cycles)
{
if (length == 0) {
return;
}
int step_count = abs(length);
if (step_count < 40) {
step_count = 40;
} else if (step_count > 400) {
step_count = 400;
}
double prev_x = x_start;
double prev_y = y_center;
for (int i = 1; i <= step_count; ++i) {
double t = (double)i / step_count;
double angle = 2.0 * M_PI * cycles * t;
double next_x = x_start + length * t;
double next_y = y_center + amplitude * sin(angle);
Paint_DrawLine((int)round(prev_x), (int)round(prev_y),
(int)round(next_x), (int)round(next_y),
BLACK, DOT_PIXEL_1X1, LINE_STYLE_SOLID);
prev_x = next_x;
prev_y = next_y;
}
}
bool editor_mode = false;
uint32_t editor_last_ts = 0;
char screen_log[2000];
int screen_log_i = 0;
sFONT *current_font = &Font12;
UBYTE editor_bg_color = WHITE;
UBYTE editor_fg_color = BLACK;
int epaper_close()
{
DEV_Delay_ms(1000);
//EPD_4IN2_V2_Init();
//EPD_4IN2_V2_Clear();
EPD_4IN2_V2_Display(BlackImage);
DEV_Delay_ms(1000);
printf("Goto Sleep...\r\n");
EPD_4IN2_V2_Sleep();
free(BlackImage);
BlackImage = NULL;
DEV_Delay_ms(2000);//important, at least 2s
screen_on = false;
return 0;
}
void process_command(char *cmd)
{
if(!editor_mode) printf("Processing command: %s\n", cmd);
Paint_NewImage(BlackImage, EPD_4IN2_V2_WIDTH, EPD_4IN2_V2_HEIGHT, 0, WHITE);
if (strcmp(cmd, "init") == 0) {
epaper_init();
printf("e-Paper initialized\n");
} else if (screen_on && strcmp(cmd, "clear") == 0 && (cmd[5] == ' ' || cmd[5] == '\0')) {
if(editor_mode){
screen_log_i = 0;
screen_log[0] = '\0';
} else {
Paint_Clear(WHITE);
printf("e-Paper cleared\n");
}
} else if (screen_on && strcmp(cmd, "clear_draw") == 0) {
Paint_Clear(WHITE);
printf("e-Paper cleared\n");
} else if (screen_on && strcmp(cmd, "display") == 0) {
EPD_4IN2_V2_Display(BlackImage);
printf("Display updated\n");
} else if (screen_on && strcmp(cmd, "draw_test") == 0) {
Paint_Clear(WHITE);
Paint_DrawString_EN(10, 0, "www.waveshare.com", &Font24, WHITE, BLACK);
Paint_DrawString_EN(10, 35, "Pico-ePaper-4.2", &Font24, BLACK, WHITE);
Paint_DrawString_CN(10, 70, "你好microPython", &Font24CN, WHITE, BLACK);
Paint_DrawString_CN(10, 110, "微雪电子", &Font24CN, BLACK, WHITE);
EPD_4IN2_V2_Display(BlackImage);
printf("Draw test complete\n");
} else if (screen_on && strncmp(cmd, "draw_text_white", 15) == 0) {
int x, y;
char text[200];
if (sscanf(cmd, "draw_text_white %d %d %199[^\n]", &x, &y, text) == 3) {
Paint_DrawString_EN(x, y, text, current_font, BLACK, WHITE);
printf("Drew white text at %d, %d: %s\n", x, y, text);
} else {
printf("Invalid draw_text_white command format. Use: draw_text_white x y text\n");
}
} else if (screen_on && strncmp(cmd, "draw_text", 9) == 0) {
int x, y;
char text[200];
if (sscanf(cmd, "draw_text %d %d %199[^\n]", &x, &y, text) == 3) {
Paint_DrawString_EN(x, y, text, current_font, WHITE, BLACK);
printf("Drew text at %d, %d: %s\n", x, y, text);
} else {
printf("Invalid draw_text command format. Use: draw_text x y text\n");
}
} else if (screen_on && strncmp(cmd, "draw_point", 10) == 0) {
int x, y;
if (sscanf(cmd, "draw_point %d %d", &x, &y) == 2) {
Paint_DrawPoint(x, y, BLACK, DOT_PIXEL_1X1, DOT_STYLE_DFT);
printf("Drew point at %d, %d\n", x, y);
} else {
printf("Invalid draw_point command format. Use: draw_point x y\n");
}
} else if (screen_on && strncmp(cmd, "draw_line", 9) == 0) {
int x1, y1, x2, y2;
if (sscanf(cmd, "draw_line %d %d %d %d", &x1, &y1, &x2, &y2) == 4) {
Paint_DrawLine(x1, y1, x2, y2, BLACK, DOT_PIXEL_1X1, LINE_STYLE_SOLID);
printf("Drew line from %d,%d to %d,%d\n", x1, y1, x2, y2);
} else {
printf("Invalid draw_line command format. Use: draw_line x1 y1 x2 y2\n");
}
} else if (screen_on && strncmp(cmd, "draw_sine", 9) == 0) {
int x, y, length, amplitude;
float frequency;
if (sscanf(cmd, "draw_sine %d %d %d %d %f", &x, &y, &length, &amplitude, &frequency) == 5) {
draw_sine_wave_line(x, y, length, amplitude, frequency);
printf("Drew sine wave starting at %d,%d length %d amplitude %d frequency %.2f\n", x, y, length, amplitude, frequency);
} else {
printf("Invalid draw_sine command format. Use: draw_sine x y length amplitude frequency\n");
}
} else if (screen_on && strncmp(cmd, "draw_rectangle", 14) == 0 && (cmd[14] == ' ' || cmd[14] == '\0')) {
int x1, y1, x2, y2;
if (sscanf(cmd, "draw_rectangle %d %d %d %d", &x1, &y1, &x2, &y2) == 4) {
Paint_DrawRectangle(x1, y1, x2, y2, BLACK, DOT_PIXEL_1X1, DRAW_FILL_EMPTY);
printf("Drew rectangle from %d,%d to %d,%d\n", x1, y1, x2, y2);
} else {
printf("Invalid draw_rectangle command format. Use: draw_rectangle x1 y1 x2 y2\n");
}
} else if (screen_on && strncmp(cmd, "draw_rectangle_fill", 18) == 0) {
int x1, y1, x2, y2;
if (sscanf(cmd, "draw_rectangle_fill %d %d %d %d", &x1, &y1, &x2, &y2) == 4) {
Paint_DrawRectangle(x1, y1, x2, y2, BLACK, DOT_PIXEL_1X1, DRAW_FILL_FULL);
printf("Drew filled rectangle from %d,%d to %d,%d\n", x1, y1, x2, y2);
} else {
printf("Invalid draw_rectangle_fill command format. Use: draw_rectangle_fill x1 y1 x2 y2\n");
}
} else if (screen_on && strncmp(cmd, "draw_circle", 11) == 0 && (cmd[11] == ' ' || cmd[11] == '\0')) {
int x, y, r;
if (sscanf(cmd, "draw_circle %d %d %d", &x, &y, &r) == 3) {
Paint_DrawCircle(x, y, r, BLACK, DOT_PIXEL_1X1, DRAW_FILL_EMPTY);
printf("Drew circle at %d,%d with radius %d\n", x, y, r);
} else {
printf("Invalid draw_circle command format. Use: draw_circle x y r\n");
}
} else if (screen_on && strncmp(cmd, "draw_circle_fill", 16) == 0) {
int x, y, r;
if (sscanf(cmd, "draw_circle_fill %d %d %d", &x, &y, &r) == 3) {
Paint_DrawCircle(x, y, r, BLACK, DOT_PIXEL_1X1, DRAW_FILL_FULL);
printf("Drew filled circle at %d,%d with radius %d\n", x, y, r);
} else {
printf("Invalid draw_circle_fill command format. Use: draw_circle_fill x y r\n");
}
} else if (screen_on && strncmp(cmd, "draw_num", 8) == 0) {
int x, y, num;
if (sscanf(cmd, "draw_num %d %d %d", &x, &y, &num) == 3) {
Paint_DrawNum(x, y, num, &Font16, BLACK, WHITE);
printf("Drew number %d at %d,%d\n", num, x, y);
} else {
printf("Invalid draw_num command format. Use: draw_num x y num\n");
}
} else if (screen_on && strncmp(cmd, "set_pixel", 9) == 0) {
int x, y, color;
if (sscanf(cmd, "set_pixel %d %d %d", &x, &y, &color) == 3) {
Paint_SetPixel(x, y, color);
printf("Set pixel at %d,%d to color %d\n", x, y, color);
} else {
printf("Invalid set_pixel command format. Use: set_pixel x y color\n");
}
} else if (screen_on && strcmp(cmd, "close") == 0) {
epaper_close();
printf("e-Paper closed\n");
} else if (screen_on && strncmp(cmd, "editor", 6) == 0 && (cmd[6] == '\0' || cmd[6] == ' ')) {
int invert_flag = 0;
if (cmd[6] == ' ') {
if (sscanf(cmd, "editor %d", &invert_flag) != 1) {
printf("Invalid editor command format. Use: editor [0|1]\n");
return;
}
}
if (invert_flag != 0) {
editor_bg_color = BLACK;
editor_fg_color = WHITE;
} else {
editor_bg_color = WHITE;
editor_fg_color = BLACK;
}
if (!editor_mode) {
screen_log_i = 0;
screen_log[0] = '\0';
}
// editor_mode = true;
// absolute_time_t time = get_absolute_time();
// editor_last_ts = to_ms_since_boot(time);
printf("Editor mode enabled (%s background)\n", invert_flag != 0 ? "black" : "white");
} else {
if(!editor_mode) printf("Unknown command: %s\n", cmd);
}
if(editor_mode) Paint_NewImage(EditorImage, EPD_4IN2_V2_WIDTH, EPD_4IN2_V2_HEIGHT, 0, WHITE);
}
void core1_entry() {
epaper_init();
EPD_4IN2_V2_Display(BlackImage);
char cmd_buffer[256];
int i = 0;
bool display_image_on_editor = false;
while (true) {
bool newChar = false;
while (!queue_is_empty(&q)) {
int c;
queue_remove_blocking(&q, &c);
newChar = true;
if(editor_mode){
// absolute_time_t time = get_absolute_time();
// editor_last_ts = to_ms_since_boot(time);
display_image_on_editor = false;
if (c == '\n' || c == '\r') {
screen_log[screen_log_i++] = '\n';
} else if (c == '\b' || c == 127) { // Handle backspace
if (screen_log_i > 0) {
screen_log_i--;
}
} else {
if (screen_log_i < (sizeof(screen_log) - 1)) {
screen_log[screen_log_i++] = c;
}
}
}
if (c == '\n' || c == '\r') {
cmd_buffer[i] = '\0';
process_command(cmd_buffer);
i = 0;
// Clear the command buffer display area
if(!editor_mode){
Paint_ClearWindows(1, 281, 399, 299, WHITE);
}
break;
} else if (c == '\b' || c == 127) { // Handle backspace
if (i > 0) {
i--;
}
} else if (c == '\t'){
editor_mode = !editor_mode;
//display_image_on_editor = true;
} else {
if (i < (sizeof(cmd_buffer) - 1)) {
cmd_buffer[i++] = c;
}
}
}
if(newChar){
if(!screen_on){
epaper_init();
}
absolute_time_t time = get_absolute_time();
screen_last_ts = to_ms_since_boot(time);
if(editor_mode){
bool overflow = false;
Paint_Clear(editor_bg_color);
screen_log[screen_log_i] = '\0';
overflow = Paint_DrawString_EN(10, 10, screen_log, current_font, editor_bg_color, editor_fg_color);
if(overflow){
while(screen_log[screen_log_i] != '\n' || screen_log_i>1){
screen_log_i--;
}
if(screen_log_i!=0){
int new_i = 0;
while(screen_log[screen_log_i] != '\0'){
screen_log[new_i++] = screen_log[screen_log_i++];
}
screen_log_i = new_i;
}
Paint_Clear(editor_bg_color);
// if overflow reset the screen_log buffer with only the last line
Paint_DrawString_EN(10, 10, screen_log, current_font, editor_bg_color, editor_fg_color);
}
EPD_4IN2_V2_PartialDisplay(EditorImage, 0, 0, 400, 300);
} else {
cmd_buffer[i] = '\0';
// Update the command buffer display
Paint_ClearWindows(2, 271, 399, 299, WHITE);
Paint_DrawRectangle(1, 270, 400, 300, BLACK, DOT_PIXEL_1X1, DRAW_FILL_EMPTY);
// printf("Current: %s, buff:%s\n", text, cmd_buffer);
Paint_DrawString_EN(10, 275, cmd_buffer, &Font16, WHITE, BLACK);
EPD_4IN2_V2_PartialDisplay(BlackImage, 0, 0, 400, 300);
}
}
if(screen_on){
absolute_time_t time = get_absolute_time();
uint32_t ms = to_ms_since_boot(time);
if(screen_last_ts + 30000 < ms){
printf("Turning off screen due to inactivity (30s)");
epaper_close();
}
}
}
}
int main()
{
stdio_init_all();
printf("e-ink api ready\n");
queue_init(&q, sizeof(int), 256);
multicore_launch_core1(core1_entry);
while (true) {
int c = getchar_timeout_us(0);
if (c != PICO_ERROR_TIMEOUT) {
queue_add_blocking(&q, &c);
if (c == '\n' || c == '\r') {
printf("\n");
} else if (c == '\b' || c == 127) {
printf("\b \b");
} else {
printf("%c", c);
}
}
absolute_time_t time = get_absolute_time();
uint32_t ms = to_ms_since_boot(time);
//if(editor_last_ts != 0 && editor_mode && (editor_last_ts + 10000 < ms)){
// printf("Disabling editor after 10s of inactivity");
// editor_mode = false;
// editor_bg_color = WHITE;
// editor_fg_color = BLACK;
//}
}
epaper_close();
return 0;
}
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