#include "ao.h"
-uint8_t ao_btm_running;
-uint8_t ao_btm_stdio;
+int8_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];
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;
}
;
}
+/*
+ * Set the stdio echo for the bluetooth link
+ */
void
ao_btm_echo(uint8_t echo)
{
}
/*
- * A command line pre-processor to detect connect/disconnect messages
- * and update the internal state
+ * Delay between command charaters; the BT module
+ * can't keep up with 57600 baud
*/
-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)
+void
+ao_btm_putchar(char c)
{
- char c;
- 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;
+ ao_serial_putchar(c);
+ ao_delay(1);
}
/*
{
for (;;) {
ao_btm_get_line();
- if (!strcmp(ao_btm_reply, "OK"))
+ if (!strncmp(ao_btm_reply, "OK", 2))
return 1;
- if (!strcmp(ao_btm_reply, "ERROR"))
+ if (!strncmp(ao_btm_reply, "ERROR", 5))
return -1;
if (ao_btm_reply[0] == '\0')
return 0;
}
void
+ao_btm_string(__code char *cmd)
+{
+ char c;
+
+ while (c = *cmd++)
+ ao_btm_putchar(c);
+}
+
+uint8_t
ao_btm_cmd(__code char *cmd)
{
- ao_cur_stdio = ao_btm_stdio;
- printf(cmd);
- ao_btm_wait_reply();
+ ao_btm_drain();
+ ao_btm_string(cmd);
+ return ao_btm_wait_reply();
+}
+
+uint8_t
+ao_btm_set_name(void)
+{
+ char sn[8];
+ char *s = sn + 8;
+ char c;
+ int n;
+ ao_btm_string("ATN=TeleBT-");
+ *--s = '\0';
+ *--s = '\r';
+ n = ao_serial_number;
+ do {
+ *--s = '0' + n % 10;
+ } while (n /= 10);
+ while ((c = *s++))
+ ao_btm_putchar(c);
+ return ao_btm_wait_reply();
+}
+
+uint8_t
+ao_btm_try_speed(uint8_t speed)
+{
+ ao_serial_set_speed(speed);
+ ao_btm_drain();
+ (void) ao_btm_cmd("\rATE0\rATQ0\r");
+ if (ao_btm_cmd("AT\r") == 1)
+ return 1;
+ return 0;
}
/*
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");
+ /*
+ * Wait for the bluetooth device to boot
+ */
+ ao_delay(AO_SEC_TO_TICKS(3));
+
+#if HAS_BEEP
+ ao_beep_for(AO_BEEP_MID, AO_MS_TO_TICKS(200));
+#endif
+
+ /*
+ * The first time we connect, the BTM-180 comes up at 19200 baud.
+ * After that, it will remember and come up at 57600 baud. So, see
+ * if it is already running at 57600 baud, and if that doesn't work
+ * then tell it to switch to 57600 from 19200 baud.
+ */
+ while (!ao_btm_try_speed(AO_SERIAL_SPEED_57600)) {
+ ao_delay(AO_SEC_TO_TICKS(1));
+ if (ao_btm_try_speed(AO_SERIAL_SPEED_19200))
+ ao_btm_cmd("ATL4\r");
+ ao_delay(AO_SEC_TO_TICKS(1));
+ }
+
+ /* Disable echo */
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;
+
+ /* Enable flow control */
+ ao_btm_cmd("ATC1\r");
+
+ /* Set the reported name to something we can find on the host */
+ ao_btm_set_name();
+
+ /* Turn off status reporting */
+ ao_btm_cmd("ATQ1\r");
+
+ ao_btm_stdio = ao_add_stdio(ao_serial_pollchar,
+ ao_serial_putchar,
+ NULL);
+ ao_btm_echo(0);
+
for (;;) {
- while (!ao_btm_connected && !ao_btm_chat)
+ while (!ao_btm_connected)
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));
__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;
+#if BT_LINK_ON_P2
+#define BT_PICTL_ICON PICTL_P2ICON
+#define BT_PIFG P2IFG
+#define BT_PDIR P2DIR
+#define BT_PINP P2INP
+#define BT_IEN2_PIE IEN2_P2IE
+#endif
+#if BT_LINK_ON_P1
+#define BT_PICTL_ICON PICTL_P1ICON
+#define BT_PIFG P1IFG
+#define BT_PDIR P1DIR
+#define BT_PINP P1INP
+#define BT_IEN2_PIE IEN2_P1IE
+#endif
- 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_chat = 0;
- while (!ao_btm_running) {
- ao_wakeup(&ao_usart1_rx_fifo);
- ao_delay(AO_MS_TO_TICKS(10));
+void
+ao_btm_check_link() __critical
+{
+ /* Check the pin and configure the interrupt detector to wait for the
+ * pin to flip the other way
+ */
+ if (BT_LINK_PIN) {
+ ao_btm_connected = 0;
+ PICTL |= BT_PICTL_ICON;
+ } else {
+ ao_btm_connected = 1;
+ PICTL &= ~BT_PICTL_ICON;
}
}
-/*
- * Dump everything received from the bluetooth device during startup
- */
-static void
-ao_btm_dump(void)
+void
+ao_btm_isr(void)
+#if BT_LINK_ON_P1
+ __interrupt 15
+#endif
{
- int i;
-
- for (i = 0; i < ao_btm_ptr; i++)
- putchar(ao_btm_buffer[i]);
- putchar('\n');
+#if BT_LINK_ON_P1
+ P1IF = 0;
+#endif
+ if (BT_PIFG & (1 << BT_LINK_PIN_INDEX)) {
+ ao_btm_check_link();
+ ao_wakeup(&ao_btm_connected);
+ }
+ BT_PIFG = 0;
}
-__code struct ao_cmds ao_btm_cmds[] = {
- { 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);
+
+#if BT_LINK_ON_P1
+ /*
+ * Configure ser reset line
+ */
+
+ P1_6 = 0;
+ P1DIR |= (1 << 6);
+#endif
+
+ /*
+ * Configure link status line
+ */
+
+ /* Set pin to input */
+ BT_PDIR &= ~(1 << BT_LINK_PIN_INDEX);
+
+ /* Set pin to tri-state */
+ BT_PINP |= (1 << BT_LINK_PIN_INDEX);
+
+ /* Enable interrupts */
+ IEN2 |= BT_IEN2_PIE;
+
+ /* Check current pin state */
+ ao_btm_check_link();
+
+#if BT_LINK_ON_P2
+ /* Eable the pin interrupt */
+ PICTL |= PICTL_P2IEN;
+#endif
+#if BT_LINK_ON_P1
+ /* Enable pin interrupt */
+ P1IEN |= (1 << BT_LINK_PIN_INDEX);
+#endif
+
ao_add_task(&ao_btm_task, ao_btm, "bt");
- ao_cmd_register(&ao_btm_cmds[0]);
}
projects / fw / altos / blobdiff