diff options
| -rw-r--r-- | src/ao_btm.c | 231 | ||||
| -rw-r--r-- | src/ao_pins.h | 1 |
2 files changed, 214 insertions, 18 deletions
diff --git a/src/ao_btm.c b/src/ao_btm.c index 224d3e81..c7024ed3 100644 --- a/src/ao_btm.c +++ b/src/ao_btm.c @@ -17,56 +17,251 @@ #include "ao.h" -uint8_t ao_btm_enable; +uint8_t ao_btm_running; +uint8_t ao_btm_stdio; +__xdata uint8_t ao_btm_connected; +uint8_t ao_btm_chat; + +__xdata char ao_btm_buffer[1024]; +int ao_btm_ptr; + +#define AO_BTM_MAX_REPLY 16 +__xdata char ao_btm_reply[AO_BTM_MAX_REPLY]; + extern volatile __xdata struct ao_fifo ao_usart1_rx_fifo; +/* + * Read a line of data from the serial port, truncating + * it after a few characters. + */ + +uint8_t +ao_btm_get_line(void) +{ + uint8_t ao_btm_reply_len = 0; + char c; + + for (;;) { + + while ((c = ao_serial_pollchar()) != AO_READ_AGAIN) { + if (ao_btm_reply_len < sizeof (ao_btm_reply)) + ao_btm_reply[ao_btm_reply_len++] = c; + if (ao_btm_ptr < sizeof (ao_btm_buffer)) + ao_btm_buffer[ao_btm_ptr++] = c; + if (c == '\r' || c == '\n') + goto done; + } + for (c = 0; c < 10; c++) { + ao_delay(AO_MS_TO_TICKS(10)); + if (!ao_fifo_empty(ao_usart1_rx_fifo)) + break; + } + if (c == 10) + goto done; + } +done: + for (c = ao_btm_reply_len; c < sizeof (ao_btm_reply);) + ao_btm_reply[c++] = '\0'; + return ao_btm_reply_len; +} + +/* + * Drain the serial port completely + */ void -ao_btm(void) +ao_btm_drain() +{ + while (ao_btm_get_line()) + ; +} + +void +ao_btm_echo(uint8_t echo) +{ + ao_stdios[ao_btm_stdio].echo = echo; +} + +/* + * A command line pre-processor to detect connect/disconnect messages + * and update the internal state + */ + +uint8_t +ao_cmd_filter(void) +{ + ao_cmd_lex(); + while (ao_cmd_lex_c != '\n') { + if (ao_match_word("CONNECT")) { + ao_btm_connected = 1; + ao_btm_echo(1); + ao_wakeup(&ao_btm_connected); + return 1; + } + if (ao_match_word("DISCONNECT")) { + ao_btm_connected = 0; + ao_btm_echo(0); + ao_wakeup(&ao_btm_connected); + return 1; + } + if (ao_match_word("ERROR")) + return 1; + if (ao_match_word("OK")) + return 1; + ao_cmd_lex(); + } + ao_cmd_status = 0; + return !ao_btm_connected; +} + +/* + * A wrapper for ao_serial_pollchar that + * doesn't return any characters while we're + * initializing the bluetooth device + */ +char +ao_btm_pollchar(void) { char c; - while (ao_btm_enable) { - c = ao_serial_pollchar(); - if (c != AO_READ_AGAIN) - ao_usb_putchar(c); - else { - ao_usb_flush(); - ao_sleep(&ao_usart1_rx_fifo); + if (!ao_btm_running) + return AO_READ_AGAIN; + c = ao_serial_pollchar(); + if (c != AO_READ_AGAIN) + if (ao_btm_ptr < sizeof (ao_btm_buffer)) + ao_btm_buffer[ao_btm_ptr++] = c; + return c; +} + +/* + * Wait for the bluetooth device to return + * status from the previously executed command + */ +uint8_t +ao_btm_wait_reply(void) +{ + for (;;) { + ao_btm_get_line(); + if (!strcmp(ao_btm_reply, "OK")) + return 1; + if (!strcmp(ao_btm_reply, "ERROR")) + return -1; + if (ao_btm_reply[0] == '\0') + return 0; + } +} + +void +ao_btm_cmd(__code char *cmd) +{ + ao_cur_stdio = ao_btm_stdio; + printf(cmd); + ao_btm_wait_reply(); +} + +/* + * A thread to initialize the bluetooth device and + * hang around to blink the LED when connected + */ +void +ao_btm(void) +{ + ao_serial_set_speed(AO_SERIAL_SPEED_19200); + ao_add_stdio(ao_btm_pollchar, + ao_serial_putchar, + NULL); + ao_btm_stdio = ao_num_stdios - 1; + ao_cur_stdio = ao_btm_stdio; + ao_btm_echo(0); + ao_btm_drain(); + ao_delay(AO_SEC_TO_TICKS(1)); + printf("+++"); + ao_btm_drain(); + ao_delay(AO_SEC_TO_TICKS(1)); + printf("\r"); + ao_btm_drain(); + ao_btm_cmd("ATQ0\r"); + ao_btm_cmd("ATE0\r"); + ao_btm_cmd("ATH\r"); + ao_delay(AO_SEC_TO_TICKS(1)); + ao_btm_cmd("ATC0\r"); + ao_btm_cmd("ATL4\r"); + ao_serial_set_speed(AO_SERIAL_SPEED_57600); + ao_btm_drain(); + printf("ATN=TeleBT-%d\r", ao_serial_number); + ao_btm_wait_reply(); + ao_btm_running = 1; + for (;;) { + while (!ao_btm_connected && !ao_btm_chat) + ao_sleep(&ao_btm_connected); + if (ao_btm_chat) { + ao_btm_running = 0; + while (ao_btm_chat) { + char c; + c = ao_serial_pollchar(); + if (c != AO_READ_AGAIN) + ao_usb_putchar(c); + else { + ao_usb_flush(); + ao_sleep(&ao_usart1_rx_fifo); + } + } + ao_btm_running = 1; + } + while (ao_btm_connected) { + ao_led_for(AO_LED_GREEN, AO_MS_TO_TICKS(20)); + ao_delay(AO_SEC_TO_TICKS(3)); } } - ao_exit(); } -__xdata struct ao_task ao_btm_task; +__xdata struct ao_task ao_btm_task; +/* + * Connect directly to the bluetooth device, mostly + * useful for testing + */ static void ao_btm_forward(void) { char c; - ao_btm_enable = 1; - flush(); - ao_add_task(&ao_btm_task, ao_btm, "btm"); + ao_btm_chat = 1; + ao_wakeup(&ao_btm_connected); + ao_usb_flush(); while ((c = ao_usb_getchar()) != '~') { if (c == '\n') c = '\r'; ao_serial_putchar(c); } - ao_btm_enable = 0; - while (ao_btm_task.wchan) { + ao_btm_chat = 0; + while (!ao_btm_running) { ao_wakeup(&ao_usart1_rx_fifo); ao_delay(AO_MS_TO_TICKS(10)); } } +/* + * Dump everything received from the bluetooth device during startup + */ +static void +ao_btm_dump(void) +{ + int i; + + for (i = 0; i < ao_btm_ptr; i++) + putchar(ao_btm_buffer[i]); + putchar('\n'); +} + __code struct ao_cmds ao_btm_cmds[] = { - { ao_btm_forward, "B <data>\0BTM serial link." }, + { ao_btm_forward, "B\0BTM serial link." }, + { ao_btm_dump, "d\0Dump btm buffer." }, { 0, NULL }, }; - void ao_btm_init (void) { ao_serial_init(); ao_serial_set_speed(AO_SERIAL_SPEED_19200); + ao_add_task(&ao_btm_task, ao_btm, "bt"); ao_cmd_register(&ao_btm_cmds[0]); } diff --git a/src/ao_pins.h b/src/ao_pins.h index a4ebd63b..ed42df8b 100644 --- a/src/ao_pins.h +++ b/src/ao_pins.h @@ -224,6 +224,7 @@ #define HAS_BEEP 0 #define HAS_SERIAL_1 1 #define USE_SERIAL_STDIN 1 + #define HAS_CMD_FILTER 1 #define HAS_ADC 0 #define HAS_DBG 1 #define HAS_EEPROM 0 |