474 lines
16 KiB
C++
474 lines
16 KiB
C++
/*
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* USB Host Keyboard Example with Display Support
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*/
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#include "pico/stdlib.h"
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#include "pico/time.h"
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#include "pico/multicore.h"
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#include "tusb.h"
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#include <stdio.h>
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#include <ctype.h>
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#include <cstring>
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#include <stdlib.h>
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#include "display.h"
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#include "commands/echo.h"
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// e-Paper library includes
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extern "C" {
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#include "DEV_Config.h"
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#include "EPD_7in5b_V2.h"
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#include "GUI_Paint.h"
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}
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// Holds last echoed line for display
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static char g_last_echo[128] = "";
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// e-Paper display buffers
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static UBYTE *g_epd_image = NULL; // Black image buffer
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static UBYTE *g_epd_red = NULL; // Red image buffer
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// Entry list for display
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#define MAX_ENTRIES 15
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#define ENTRY_LENGTH 64
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typedef struct {
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char entries[MAX_ENTRIES][ENTRY_LENGTH];
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int count;
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} EntryList;
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static EntryList g_entry_list = {{}, 0};
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static bool g_force_full_refresh = false; // Flag to force full refresh when list is full
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// Synchronization flag for multicore initialization
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static volatile bool g_display_ready = false;
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// Display update message structure for inter-core communication
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typedef struct {
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EntryList entries;
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bool use_partial; // Use partial refresh instead of full refresh
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UWORD xstart; // Partial refresh region
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UWORD ystart;
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UWORD xend;
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UWORD yend;
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} DisplayMessage;
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void init_epaper_display() {
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printf("Initializing 7.5\" e-Paper display (B V2)...\r\n");
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// Initialize the hardware
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if (DEV_Module_Init() != 0) {
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printf("Failed to initialize e-Paper hardware!\r\n");
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return;
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}
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// Initialize the display
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printf("EPD_7IN5B_V2_Init()\r\n");
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EPD_7IN5B_V2_Init_Fast();
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printf("EPD_7IN5B_V2_Clear()\r\n");
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// EPD_7IN5B_V2_Clear();
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// DEV_Delay_ms(500);
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// Create image buffers for black and red content
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// 7.5" display: 800x480, 8 pixels per byte, so (800/8) * 480 = 48000 bytes each
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UWORD imagesize = (EPD_7IN5B_V2_WIDTH / 8) * EPD_7IN5B_V2_HEIGHT;
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g_epd_image = (UBYTE *)malloc(imagesize);
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g_epd_red = (UBYTE *)malloc(imagesize);
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if (g_epd_image == NULL || g_epd_red == NULL) {
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printf("Failed to allocate memory for e-Paper image buffers!\r\n");
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return;
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}
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// Initialize red buffer to all white (0xFF = no red pixels)
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for (UWORD i = 0; i < imagesize; i++) {
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g_epd_red[i] = 0xFF;
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}
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// Setup paint buffer for black content
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printf("White background\r\n");
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Paint_NewImage(g_epd_image, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT, 0, WHITE);
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Paint_SelectImage(g_epd_image);
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Paint_Clear(WHITE);
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// Draw header
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EPD_7IN5B_V2_Init_Part();
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EPD_7IN5B_V2_Display_Partial(g_epd_image, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
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EPD_7IN5B_V2_Display_Partial(g_epd_image, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
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EPD_7IN5B_V2_Display_Partial(g_epd_image, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
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Paint_SelectImage(g_epd_red);
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printf("Drawing header\r\n");
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Paint_DrawString_EN(10, 10, "What's new today:", &Font24, WHITE, RED);
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// Display the image with both black and red buffers
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EPD_7IN5B_V2_Display_Partial(g_epd_red, 0, 0, EPD_7IN5B_V2_WIDTH, EPD_7IN5B_V2_HEIGHT);
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printf("e-Paper display ready!\r\n");
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}
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/**
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* Add an entry to the display list and send update to core 1
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*/
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void send_display_update(const char *entry) {
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if (!g_display_ready) return; // Don't send if display isn't ready
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// Check if list is at capacity
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if (g_entry_list.count >= MAX_ENTRIES) {
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// List is full - clear all entries and start fresh
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printf("[Core 0] List is FULL - clearing all entries and starting fresh\n");
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g_entry_list.count = 0;
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g_force_full_refresh = true;
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}
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// Add entry to global list
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strncpy(g_entry_list.entries[g_entry_list.count], entry, ENTRY_LENGTH - 1);
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g_entry_list.entries[g_entry_list.count][ENTRY_LENGTH - 1] = '\0';
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g_entry_list.count++;
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// Allocate message structure
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DisplayMessage *msg = (DisplayMessage *)malloc(sizeof(DisplayMessage));
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if (msg == NULL) {
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printf("Failed to allocate display message!\n");
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return;
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}
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// Copy entry list to message
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msg->entries = g_entry_list;
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// Decide whether to use partial or full refresh
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msg->use_partial = !g_force_full_refresh;
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if (g_force_full_refresh) {
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printf("[Core 0] Forcing full refresh this update\n");
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g_force_full_refresh = false; // Reset flag after setting it in message
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}
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// Setup partial refresh region (text area at top of display)
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msg->xstart = 0;
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msg->ystart = 50; // Start below the header
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msg->xend = 800; // Full width
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msg->yend = 480; // Full height from header onwards
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// Send message pointer to core 1
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multicore_fifo_push_blocking((uint32_t)msg);
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// Wait for core 1 to complete the update
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multicore_fifo_pop_blocking();
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}
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/**
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* Core 1 function: Runs display initialization and update handling
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*/
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void core1_display_init() {
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init_epaper_display();
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g_display_ready = true;
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printf("[Core 1] Display ready, waiting for update messages...\n");
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// Initialize for partial refresh on second call
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EPD_7IN5B_V2_Init_Part();
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// Core 1 main loop: handle display updates via FIFO
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while (true) {
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// Check if there's a message from core 0
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if (multicore_fifo_rvalid()) {
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// Read the message pointer
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uint32_t msg_addr = multicore_fifo_pop_blocking();
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DisplayMessage *msg = (DisplayMessage *)msg_addr;
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printf("[Core 1] Updating display with %d entries\n", msg->entries.count);
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// Update the e-Paper display
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if (g_epd_image != NULL && g_epd_red != NULL) {
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UWORD imagesize = (EPD_7IN5B_V2_WIDTH / 8) * EPD_7IN5B_V2_HEIGHT;
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// For partial refresh, only clear the text area
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UWORD width = (EPD_7IN5B_V2_WIDTH / 8);
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UWORD y_start = msg->ystart;
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UWORD y_end = msg->yend;
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Paint_SelectImage(g_epd_image);
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Paint_Clear(WHITE);
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if(!msg->use_partial){
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// for loop 5 times display white partial
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int i = 0;
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for(i = 0; i < 1; i++){
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EPD_7IN5B_V2_Display_Partial(g_epd_image, msg->xstart, msg->ystart, msg->xend, msg->yend);
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}
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}
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// Draw all entries starting below header
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UWORD y_pos = 0;
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// paint only the last 3 entries
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int start_index = msg->entries.count > 2 ? msg->entries.count - 2 : 0;
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for (int i = start_index; i < msg->entries.count; i++) {
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if (y_pos + 25 < 480) { //Don't draw beyond screen
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Paint_DrawString_EN(20, i*25, msg->entries.entries[i], &Font16, WHITE, BLACK);
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y_pos += 25; // Space between entries
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} else {
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printf("Skipping entry to avoid overflow\n");
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}
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}
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// Use partial or full refresh
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printf("[Core 1] Using partial refresh\n");
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EPD_7IN5B_V2_Display_Partial(g_epd_image, msg->xstart, msg->ystart, msg->xend, msg->yend);
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}
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// Free the message (it was allocated by core 0)
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free(msg);
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// Signal back to core 0 that update is complete
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multicore_fifo_push_blocking(1);
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}
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sleep_ms(10);
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}
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}
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// Global DisplayManager pointer
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static DisplayManager* g_display_manager = nullptr;
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// Keyboard buffer
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#define MAX_INPUT_LEN 64
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static char g_input_buffer[MAX_INPUT_LEN];
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static int g_buffer_index = 0;
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// ASCII code for Backspace (often sent as 0x08)
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#define ASCII_BACKSPACE 8
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static const uint8_t keycode2ascii[128][2] = {
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{0, 0}, /* 0x00 */
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{0, 0}, /* 0x01 */
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{0, 0}, /* 0x02 */
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{0, 0}, /* 0x03 */
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{'a', 'A'}, /* 0x04 */
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{'b', 'B'}, /* 0x05 */
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{'c', 'C'}, /* 0x06 */
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{'d', 'D'}, /* 0x07 */
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{'e', 'E'}, /* 0x08 */
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{'f', 'F'}, /* 0x09 */
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{'g', 'G'}, /* 0x0a */
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{'h', 'H'}, /* 0x0b */
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{'i', 'I'}, /* 0x0c */
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{'j', 'J'}, /* 0x0d */
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{'k', 'K'}, /* 0x0e */
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{'l', 'L'}, /* 0x0f */
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{'m', 'M'}, /* 0x10 */
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{'n', 'N'}, /* 0x11 */
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{'o', 'O'}, /* 0x12 */
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{'p', 'P'}, /* 0x13 */
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{'q', 'Q'}, /* 0x14 */
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{'r', 'R'}, /* 0x15 */
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{'s', 'S'}, /* 0x16 */
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{'t', 'T'}, /* 0x17 */
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{'u', 'U'}, /* 0x18 */
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{'v', 'V'}, /* 0x19 */
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{'w', 'W'}, /* 0x1a */
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{'x', 'X'}, /* 0x1b */
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{'y', 'Y'}, /* 0x1c */
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{'z', 'Z'}, /* 0x1d */
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{'1', '!'}, /* 0x1e */
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{'2', '@'}, /* 0x1f */
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{'3', '#'}, /* 0x20 */
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{'4', '$'}, /* 0x21 */
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{'5', '%'}, /* 0x22 */
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{'6', '^'}, /* 0x23 */
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{'7', '&'}, /* 0x24 */
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{'8', '*'}, /* 0x25 */
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{'9', '('}, /* 0x26 */
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{'0', ')'}, /* 0x27 */
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{'\r', '\r'}, /* 0x28 ENTER */
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{'\x1b', '\x1b'}, /* 0x29 ESCAPE */
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{'\b', '\b'}, /* 0x2a BACKSPACE */
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{'\t', '\t'}, /* 0x2b TAB */
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{' ', ' '}, /* 0x2c SPACE */
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{'-', '_'}, /* 0x2d MINUS */
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{'=', '+'}, /* 0x2e EQUAL */
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{'[', '{'}, /* 0x2f BRACKET_LEFT */
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{']', '}'}, /* 0x30 BRACKET_RIGHT */
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{'\\', '|'}, /* 0x31 BACKSLASH */
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{'#', '~'}, /* 0x32 EUROPE_1 */
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{';', ':'}, /* 0x33 SEMICOLON */
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{'\'', '\"'}, /* 0x34 APOSTROPHE */
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{'`', '~'}, /* 0x35 GRAVE */
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{',', '<'}, /* 0x36 COMMA */
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{'.', '>'}, /* 0x37 PERIOD */
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{'/', '?'}, /* 0x38 SLASH */
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{0, 0}, /* 0x39 CAPS_LOCK */
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{0, 0}, /* 0x3a F1 */
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{0, 0}, /* 0x3b F2 */
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{0, 0}, /* 0x3c F3 */
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{0, 0}, /* 0x3d F4 */
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{0, 0}, /* 0x3e F5 */
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{0, 0}, /* 0x3f F6 */
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{0, 0}, /* 0x40 F7 */
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{0, 0}, /* 0x41 F8 */
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{0, 0}, /* 0x42 F9 */
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{0, 0}, /* 0x43 F10 */
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{0, 0}, /* 0x44 F11 */
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{0, 0}, /* 0x45 F12 */
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{0, 0}, /* 0x46 PRINT_SCREEN */
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{0, 0}, /* 0x47 SCROLL_LOCK */
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{0, 0}, /* 0x48 PAUSE */
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{0, 0}, /* 0x49 INSERT */
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{0, 0}, /* 0x4a HOME */
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{0, 0}, /* 0x4b PAGE_UP */
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{0, 0}, /* 0x4c DELETE */
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{0, 0}, /* 0x4d END */
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{0, 0}, /* 0x4e PAGE_DOWN */
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{0, 0}, /* 0x4f RIGHT_ARROW */
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{0, 0}, /* 0x50 LEFT_ARROW */
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{0, 0}, /* 0x51 DOWN_ARROW */
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{0, 0}, /* 0x52 UP_ARROW */
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{0, 0}, /* 0x53 NUM_LOCK */
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{'/', '/'}, /* 0x54 KP_DIVIDE */
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{'*', '*'}, /* 0x55 KP_MULTIPLY */
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{'-', '-'}, /* 0x56 KP_MINUS */
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{'+', '+'}, /* 0x57 KP_PLUS */
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{'\r', '\r'}, /* 0x58 KP_ENTER */
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{'1', '1'}, /* 0x59 KP_1 */
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{'2', '2'}, /* 0x5a KP_2 */
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{'3', '3'}, /* 0x5b KP_3 */
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{'4', '4'}, /* 0x5c KP_4 */
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{'5', '5'}, /* 0x5d KP_5 */
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{'6', '6'}, /* 0x5e KP_6 */
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{'7', '7'}, /* 0x5f KP_7 */
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{'8', '8'}, /* 0x60 KP_8 */
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{'9', '9'}, /* 0x61 KP_9 */
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{'0', '0'}, /* 0x62 KP_0 */
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{'.', '.'}, /* 0x63 KP_DECIMAL */
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};
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static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8_t keycode) {
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for(uint8_t i=0; i<6; i++) {
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if (report->keycode[i] == keycode) return true;
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}
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return false;
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}
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static void process_kbd_report(hid_keyboard_report_t const *report) {
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static hid_keyboard_report_t prev_report = { 0, 0, {0} };
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for(uint8_t i=0; i<6; i++) {
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if (report->keycode[i]) {
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if (find_key_in_report(&prev_report, report->keycode[i])) {
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// exist in previous report means the current key is holding
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} else {
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// not existed in previous report means the current key is pressed
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bool const is_shift = report->modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT);
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uint8_t ch = keycode2ascii[report->keycode[i]][is_shift ? 1 : 0];
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if (ch) {
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printf("%c", ch);
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if (ch == '\r' || ch == '\n') {
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printf("\n");
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// Process command
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g_input_buffer[g_buffer_index] = '\0';
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// Echo logic
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echo_and_reset(g_input_buffer, &g_buffer_index);
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// Save last echoed (all caps) for display
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size_t k = 0;
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for (; g_input_buffer[k] != '\0' && k < sizeof(g_last_echo) - 1; ++k) {
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g_last_echo[k] = g_input_buffer[k];
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}
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g_last_echo[k] = '\0';
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// Update displays
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if (g_display_manager) {
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g_display_manager->set_last_echo(g_last_echo);
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g_display_manager->refresh("", g_last_echo);
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}
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send_display_update(g_last_echo);
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// Reset buffer
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g_buffer_index = 0;
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g_input_buffer[0] = '\0';
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} else if (ch == '\b' || ch == 127) {
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if (g_buffer_index > 0) {
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g_buffer_index--;
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g_input_buffer[g_buffer_index] = '\0';
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if (g_display_manager) {
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g_display_manager->refresh(g_input_buffer, g_last_echo);
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}
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}
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} else if (g_buffer_index < MAX_INPUT_LEN - 1) {
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g_input_buffer[g_buffer_index] = ch;
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g_buffer_index++;
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g_input_buffer[g_buffer_index] = '\0';
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if (g_display_manager) {
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g_display_manager->refresh(g_input_buffer, g_last_echo);
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}
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}
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}
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}
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}
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}
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prev_report = *report;
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}
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//--------------------------------------------------------------------+
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// TinyUSB Callbacks
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//--------------------------------------------------------------------+
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void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len) {
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printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
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uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
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if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD) {
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printf("Keyboard mounted\r\n");
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if (g_display_manager) {
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g_display_manager->refresh("Keyboard Connected", nullptr);
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}
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if (!tuh_hid_receive_report(dev_addr, instance)) {
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printf("Error: cannot request to receive report\r\n");
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}
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}
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}
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void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance) {
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printf("HID device address = %d, instance = %d is unmounted\r\n", dev_addr, instance);
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if (g_display_manager) {
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g_display_manager->refresh("Keyboard Disconnected", nullptr);
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}
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}
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void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len) {
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uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance);
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if (itf_protocol == HID_ITF_PROTOCOL_KEYBOARD) {
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process_kbd_report((hid_keyboard_report_t const*) report);
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}
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// continue to request to receive report
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if (!tuh_hid_receive_report(dev_addr, instance)) {
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printf("Error: cannot request to receive report\r\n");
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}
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}
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int main() {
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stdio_init_all();
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// Launch display initialization on core 1
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printf("Launching e-Paper display init on core 1...\n");
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multicore_launch_core1(core1_display_init);
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|
|
|
DisplayManager display;
|
|
display.init();
|
|
g_display_manager = &display;
|
|
|
|
display.refresh("Waiting for Keyboard", nullptr);
|
|
|
|
printf("Initializing TinyUSB Host...\n");
|
|
tuh_init(BOARD_TUH_RHPORT);
|
|
|
|
while (true) {
|
|
tuh_task();
|
|
}
|
|
|
|
return 0;
|
|
}
|