uart_commands.c: Backspace/Delete capability
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cc060261d4
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@ -29,20 +29,21 @@ volatile unsigned char mode;
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char const UART_STR_NOTIMPL[] PROGMEM = "\r\nnot implemented";
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#endif
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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\nallowed commands: "
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"erase help msg next prev reset scroll";
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char const UART_STR_BACKSPACE[] PROGMEM = "\033[D \033[D";
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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\nallowed commands: erase help "
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"msg next prev reset scroll";
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char const UART_CMD_ERASE[] PROGMEM = "erase";
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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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char const UART_CMD_ERASE[] PROGMEM = "erase";
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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 g_uartcmd_permit_processing = 1;
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@ -164,12 +165,27 @@ static bool uartcmd_read_until_enter(void) {
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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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switch ((char)uart_result) {
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case '\r': // carriage return
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case '\n': // line feed
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if (g_rx_index != 0) {
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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 '\b': // BS
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case '\177': // DEL
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if (g_rx_index != 0) {
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g_rx_buffer[--g_rx_index] = 0;
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uart_puts_p(UART_STR_BACKSPACE);
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}
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break;
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case 27: // ignore Esc
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break;
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default:
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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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break;
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}
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break;
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@ -202,7 +218,7 @@ static bool uartcmd_read_until_enter(void) {
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*/
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void uartcmd_process(void) {
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if (uartcmd_processing_allowed() && uartcmd_read_until_enter()) {
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if (!strncmp_P(g_rx_buffer, UART_CMD_ERASE, 5)) {
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if (!strncmp_P(g_rx_buffer, UART_CMD_ERASE, UART_BUFFER_SIZE)) {
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uartcmd_erase_eeprom();
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} else if (!strncmp_P(g_rx_buffer, UART_CMD_HELP, UART_BUFFER_SIZE)) {
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uart_puts_p(UART_STR_HELP);
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