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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,10 @@ | ||
| /* Module for communicating to Stockfish `engine.py` via UART. */ | ||
| /* | ||
| * Module for communicating to Stockfish `engine.py` via UART. | ||
| * | ||
| * See `engine.py` for details on how the protocol works. | ||
| * | ||
| * Author: Ellen Xu <[email protected]> | ||
| */ | ||
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| #include "assert.h" | ||
| #include "chess.h" | ||
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@@ -15,9 +21,11 @@ static rb_ptr_t *rb; | |
| void chess_get_move(char buf[], size_t bufsize) { | ||
| assert(bufsize >= 8); | ||
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| // When we receive information from the host laptop, there is a chance that | ||
| // it might be a command, in which case we enqueue it and jump back to the | ||
| // top of the function. | ||
| char move[256]; | ||
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| /* Gets the move from Stockfish */ | ||
| int i = 0; | ||
| char ch; | ||
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@@ -26,37 +34,36 @@ void chess_get_move(char buf[], size_t bufsize) { | |
| ch = uart_getchar(); | ||
| move[i++] = ch; | ||
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| if (i >= 7 && move[0] != '/') | ||
| if (i >= 7 && move[0] != '/') // if not command and too long, break | ||
| break; | ||
| else if (i >= sizeof(move) - 1) | ||
| else if (i >= sizeof(move) - 1) // if command and too long for command | ||
| break; | ||
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| } while (ch != '\n' && ch != '\0'); | ||
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| move[i] = '\0'; | ||
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| if (move[0] == '/') { // command | ||
| if (move[0] == '/') { // found command | ||
| char *cmd = malloc(i); | ||
| memcpy(cmd, move + 1, i); | ||
| rb_ptr_enqueue(rb, (uintptr_t)cmd); | ||
| printf("Enque command: '%s'\n", cmd); | ||
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| // caller is expecting a move, so we jump back and see if we get one | ||
| i = 0; | ||
| goto was_command; | ||
| } else { | ||
| // copy the move to buffer | ||
| memcpy(buf, move, bufsize); | ||
| } | ||
| } | ||
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| char *chess_next_command(void) { | ||
| uintptr_t ptr = 0; | ||
| rb_ptr_dequeue(rb, &ptr); | ||
| if (ptr) | ||
| printf("Deq command: '%s'\n", (char *)ptr); | ||
| return (char *)ptr; | ||
| } | ||
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| void chess_send_move(const char* move) { | ||
| /* Sends a move to Stockfish (\n terminated)*/ | ||
| uart_putstring("\nMOVE_BEGIN\n"); | ||
| uart_putstring(move); | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
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@@ -5,6 +5,8 @@ | |
| * Module for Stockfish. Communicates over UART with Python script running | ||
| * Stockfish on a powerful machine (the Mango Pi would struggle). | ||
| * | ||
| * See `engine.py` for details on how the protocol works. | ||
| * | ||
| * Author: Ellen Xu <[email protected]> | ||
| * Author: Javier Garcia Nieto <[email protected]> | ||
| */ | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,7 @@ | ||
| /* | ||
| * Module for chess GUI. Displays a chess board on the screen. Includes | ||
| * function to update UI based on new move. | ||
| * function to update UI based on new move, sidebar, handling of chess rules | ||
| * like passant, promotion and castling. | ||
| * | ||
| * Author: Ellen Xu <[email protected]> | ||
| * Author: Javier Garcia Nieto <[email protected]> | ||
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@@ -315,6 +316,9 @@ static void sidebar_draw(void) { | |
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| line += 3; | ||
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| // We figured stats where getting in the way of mvoe history, so we have | ||
| // commented them out: | ||
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| // draw_text_centered( | ||
| // "Stats:", | ||
| // SQUARE_SIZE * 8, | ||
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@@ -400,37 +404,33 @@ static void draw_promote(int cursor) { | |
| "Queen" | ||
| }; | ||
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| if (0 <= cursor && cursor <= 3) { | ||
| int char_h = gl_get_char_height(); | ||
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| for (int i = 0; i < 4; i++) { | ||
| gl_draw_string( | ||
| SQUARE_SIZE * 8 + 5, | ||
| SQUARE_SIZE * 6 + (char_h + 5) * (i + 1), | ||
| PROMOTION_PIECES[i], | ||
| cursor == i ? GL_RED : SIDEBAR_FT); | ||
| } | ||
| } else { | ||
| gl_draw_rect( | ||
| SQUARE_SIZE * 8, | ||
| SQUARE_SIZE * 6, | ||
| SCREEN_WIDTH - SQUARE_SIZE * 8, | ||
| SCREEN_HEIGHT - SQUARE_SIZE * 6, | ||
| SIDEBAR_BG); | ||
| int char_h = gl_get_char_height(); | ||
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| for (int i = 0; i < 4; i++) { | ||
| gl_draw_string( | ||
| SQUARE_SIZE * 8 + 5, | ||
| SQUARE_SIZE * 6 + (char_h + 5) * (i + 1), | ||
| PROMOTION_PIECES[i], | ||
| cursor == i ? GL_RED : SIDEBAR_FT); | ||
| } | ||
| } | ||
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| void chess_gui_promote(int cursor) { | ||
| draw_promote(cursor); | ||
| gl_swap_buffer(); | ||
| draw_promote(cursor); | ||
| if (0 <= cursor && cursor <= 3) { | ||
| draw_promote(cursor); | ||
| gl_swap_buffer(); | ||
| draw_promote(cursor); | ||
| } else { | ||
| chess_gui_sidebar(); | ||
| } | ||
| } | ||
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| void chess_gui_draw_cursor(int cursor_col, int cursor_row, bool is_piece_chosen) { | ||
| if (is_piece_chosen && !cursor.has_chosen) { | ||
| cursor.chosen_col = cursor.col; | ||
| cursor.chosen_row = cursor.row; | ||
| } else if (!is_piece_chosen && cursor.has_chosen) { | ||
| // edge case: easier to just redraw whole board | ||
| stale_everything(); | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -9,6 +9,10 @@ | |
| * Module for chess GUI. Displays a chess board on the screen. Includes | ||
| * function to update UI based on new move. | ||
| * | ||
| * For efficiency, the module does its best to only redraw parts of the | ||
| * chessboard that are stale by keeping track of updates. It also uses | ||
| * DOUBLEBUFFER to avoid artifacts on the screen. | ||
| * | ||
| * Author: Ellen Xu <[email protected]> | ||
| * Author: Javier Garcia Nieto <[email protected]> | ||
| */ | ||
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