125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
#include <stdint.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdbool.h>
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#include <setjmp.h>
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#include <avr/pgmspace.h>
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#include "../config.h"
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#include "../borg_hw/borg_hw.h"
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#ifdef JOYSTICK_SUPPORT
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#include "../joystick/joystick.h"
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extern unsigned char waitForFire;
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#endif
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#include "../scrolltext/scrolltext.h"
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#include "uart.h"
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#include "uart_commands.h"
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#define UART_SCROLL_BUFFER_SIZE (SCROLLTEXT_BUFFER_SIZE + 8)
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char g_rx_buffer[UART_SCROLL_BUFFER_SIZE];
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uint8_t g_rx_index;
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extern jmp_buf newmode_jmpbuf;
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volatile unsigned char mode;
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void uartcmd_clear_buffer(void) {
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char *p = &g_rx_buffer[0];
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for (uint8_t i = UART_SCROLL_BUFFER_SIZE; i--;) {
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*p++ = 0;
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}
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g_rx_index = 0;
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}
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char const UART_STR_PROMPT[] PROGMEM = "\r\n> ";
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char const UART_STR_ERROR[] PROGMEM = "\r\ntransmission error";
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char const UART_STR_UNKNOWN[] PROGMEM = "\r\nunknown command";
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char const UART_STR_TOOLONG[] PROGMEM = "\r\ncommand to long";
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char const UART_STR_HELP[] PROGMEM = "\r\nhelp msg next prev reset scroll";
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char const UART_CMD_HELP[] PROGMEM = "help";
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char const UART_CMD_MSG[] PROGMEM = "msg ";
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char const UART_CMD_NEXT[] PROGMEM = "next";
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char const UART_CMD_PREV[] PROGMEM = "prev";
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char const UART_CMD_RESET[] PROGMEM = "reset";
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char const UART_CMD_SCROLL[] PROGMEM = "scroll ";
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bool uartcmd_read_until_enter(void) {
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while (g_rx_index < (UART_SCROLL_BUFFER_SIZE - 1)) {
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int uart_result = uart_getc();
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switch (uart_result & 0xFF00u) {
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case 0:
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if (!(uart_result == '\r' || uart_result == '\n')) {
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g_rx_buffer[g_rx_index++] = uart_result;
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uart_putc(uart_result);
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} else {
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g_rx_buffer[g_rx_index++] = 0;
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return true;
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}
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break;
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case UART_FRAME_ERROR:
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case UART_OVERRUN_ERROR:
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case UART_PARITY_ERROR:
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case UART_BUFFER_OVERFLOW:
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uartcmd_clear_buffer();
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uart_puts_p(UART_STR_ERROR);
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uart_puts_p(UART_STR_PROMPT);
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break;
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case UART_NO_DATA:
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default:
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return false;
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break;
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}
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}
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if (g_rx_index >= (UART_SCROLL_BUFFER_SIZE - 1)) {
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uartcmd_clear_buffer();
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uart_puts_p(UART_STR_TOOLONG);
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uart_puts_p(UART_STR_PROMPT);
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}
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return false;
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}
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void uartcmd_process(void) {
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if (uartcmd_read_until_enter()) {
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if (!strncmp_P(g_rx_buffer, UART_CMD_HELP, 4)) {
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uart_puts_p(UART_STR_HELP);
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} else if (!strncmp_P(g_rx_buffer, UART_CMD_MSG, 4)) {
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g_rx_buffer[1] = '<';
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g_rx_buffer[2] = '/';
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g_rx_buffer[3] = '#';
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// text must not be longer than the scroll text buffer
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g_rx_buffer[1 + SCROLLTEXT_BUFFER_SIZE - 1] = 0;
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scrolltext(&g_rx_buffer[1]);
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} else if (!strncmp_P(g_rx_buffer, UART_CMD_NEXT, 4)) {
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uart_puts_p(UART_STR_PROMPT);
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uartcmd_clear_buffer();
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#ifdef JOYSTICK_SUPPORT
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if (waitForFire)
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#endif
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longjmp(newmode_jmpbuf, mode);
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} else if (!strncmp_P(g_rx_buffer, UART_CMD_PREV, 4)) {
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uart_puts_p(UART_STR_PROMPT);
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uartcmd_clear_buffer();
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if (mode > 1) {
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#ifdef JOYSTICK_SUPPORT
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if (waitForFire)
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#endif
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longjmp(newmode_jmpbuf, mode - 2);
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}
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} else if (!strncmp_P(g_rx_buffer, UART_CMD_RESET,
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UART_SCROLL_BUFFER_SIZE)) {
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timer0_off();
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} else if (!strncmp_P(g_rx_buffer, UART_CMD_SCROLL, 7)) {
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// text must not be longer than the scroll text buffer
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g_rx_buffer[7 + SCROLLTEXT_BUFFER_SIZE - 1] = 0;
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scrolltext(&g_rx_buffer[7]);
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} else {
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uart_puts_p(UART_STR_UNKNOWN);
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}
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uart_puts_p(UART_STR_PROMPT);
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uartcmd_clear_buffer();
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}
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}
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