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feature to send image from tcp connection

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This commit is contained in:
Adolfo Reyna
2025-12-28 21:59:59 -05:00
parent 03e826653b
commit ed927e16b1
9 changed files with 212 additions and 3 deletions
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59
hello_usb.cpp
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@@ -36,8 +36,41 @@ DisplayManager* g_display_manager = nullptr;
static char g_cmd_buffer[MAX_INPUT_LEN];
static int g_cmd_index = 0;
// Image reception state
static bool g_receiving_image = false;
static uint8_t *g_image_buffer = nullptr;
static uint32_t g_image_bytes_received = 0;
static const uint32_t IMAGE_SIZE = 15000; // 400x300 / 8
void on_tcp_connection_change(bool connected) {
if (!connected) {
if (g_receiving_image) {
printf("TCP disconnected, resetting image reception\n");
g_receiving_image = false;
if (g_image_buffer) {
free(g_image_buffer);
g_image_buffer = nullptr;
}
}
// Also reset command buffer to avoid partial commands
g_cmd_index = 0;
g_cmd_buffer[0] = '\0';
}
}
static bool execute_command(CommandAction action, const char* input) {
switch (action) {
case CMD_IMAGE:
printf("Command: /image - Waiting for %d bytes...\n", IMAGE_SIZE);
if (g_image_buffer) free(g_image_buffer);
g_image_buffer = (uint8_t*)malloc(IMAGE_SIZE);
if (!g_image_buffer) {
printf("Failed to allocate image buffer!\n");
return true;
}
g_receiving_image = true;
g_image_bytes_received = 0;
return true;
case CMD_REFRESH:
printf("Command: /refresh\n");
epaper_force_refresh();
@@ -82,6 +115,7 @@ static bool execute_command(CommandAction action, const char* input) {
} else {
epaper_send_update("Connected!", true);
tcp_debug_init();
tcp_set_connection_callback(on_tcp_connection_change);
}
} else {
if (g_display_manager) g_display_manager->refresh("Connection Failed", nullptr);
@@ -175,6 +209,23 @@ void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t cons
}
static void process_input_char(char c) {
if (g_receiving_image) {
if (g_image_buffer) {
g_image_buffer[g_image_bytes_received++] = (uint8_t)c;
if (g_image_bytes_received >= IMAGE_SIZE) {
printf("\nImage received (%d bytes). Displaying...\n", g_image_bytes_received);
epaper_display_full_image(g_image_buffer, IMAGE_SIZE);
g_receiving_image = false;
g_image_buffer = nullptr; // Ownership transferred
}
} else {
g_receiving_image = false; // Error state
}
return;
}
if (c == 0) return; // Ignore null characters in text mode
if (c == '\b' || c == 127) {
if (g_cmd_index > 0) {
printf("\b \b");
@@ -190,12 +241,20 @@ static void process_input_char(char c) {
} else if (c == '\r' || c == '\n') {
printf("\n");
// Debug: Print buffer content
printf("Processing line: '%s' (len=%d)\n", g_cmd_buffer, g_cmd_index);
printf("Hex: ");
for(int i=0; i<g_cmd_index; i++) printf("%02X ", (unsigned char)g_cmd_buffer[i]);
printf("\n");
// Always commit the input line to e-Paper so commands are visible
if (g_cmd_index > 0) {
epaper_send_update(g_cmd_buffer, true);
}
CommandAction action = parse_command(g_cmd_buffer);
printf("Parsed Action: %d\n", action); // Debug action
if (execute_command(action, g_cmd_buffer)) {
// Command handled
if (g_display_manager) {