Add beep/led support.

Support our P2_0 connected buzzer, and formalize LED output support.

Signed-off-by: Keith Packard <keithp@keithp.com>

8 files changed, 187 insertions, 23 deletions

diff --git a/.gitignore b/.gitignore
index 900da3dc..5f6da548 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,5 +9,4 @@
 *.lnk
 *.map
 *.mem
-altos-flash
-altos-ram
+altos
diff --git a/Makefile b/Makefile
index 543f8e37..6bd552e6 100644
--- a/Makefile
+++ b/Makefile
@@ -21,6 +21,8 @@ INC = \
 
 SRC = \
 	ao_adc.c \
+	ao_beep.c \
+	ao_led.c \
 	ao_task.c \
 	ao_timer.c \
 	ao_panic.c \
@@ -35,7 +37,7 @@ REL=$(SRC:.c=.rel)
 RST=$(SRC:.c=.rst)
 SYM=$(SRC:.c=.sym)
 
-PROGS=$(PROG)-flash.ihx $(PROG)-ram.ihx
+PROGS=$(PROG).ihx
 PCDB=$(PROGS:.ihx=.cdb)
 PLNK=$(PROGS:.ihx=.lnk)
 PMAP=$(PROGS:.ihx=.map)
@@ -47,12 +49,9 @@ PAOM=$(PROGS:.ihx=)
 
 all: $(PROGS)
 
-$(PROG)-ram.ihx: $(REL) Makefile
-	$(CC) $(LDFLAGS_RAM) $(CFLAGS) -o $(PROG)-ram.ihx $(REL)
-	$(CC) $(LDFLAGS_FLASH) $(CFLAGS) -o $(PROG)-flash.ihx $(REL)
-	sh check-stack ao.h $(PROG)-flash.mem
-
-$(PROG)-flash.ihx: $(PROG)-ram.ihx
+$(PROG).ihx: $(REL) Makefile
+	$(CC) $(LDFLAGS_FLASH) $(CFLAGS) -o $(PROG).ihx $(REL)
+	sh check-stack ao.h $(PROG).mem
 
 clean:
 	rm -f $(ADB) $(ASM) $(LNK) $(LST) $(REL) $(RST) $(SYM)
diff --git a/ao.h b/ao.h
index fdf6b027..d3192864 100644
--- a/ao.h
+++ b/ao.h
@@ -54,6 +54,9 @@ void ao_panic(uint8_t reason);
 
 volatile __data uint16_t ao_time;
 
+#define AO_MS_TO_TICKS(ms)	((ms) / 10)
+#define AO_SEC_TO_TICKS(s)	((s) * 100)
+
 void ao_timer_isr(void) interrupt 9;
 void ao_timer_init(void);
 uint16_t ao_time_atomic(void);
@@ -73,12 +76,49 @@ struct ao_adc {
 	int16_t		sense_m;
 };
 
-extern __xdata struct ao_adc	ao_adc_ring[ADC_RING];
-extern __data uint8_t		ao_adc_head;
+extern volatile __xdata struct ao_adc	ao_adc_ring[ADC_RING];
+extern volatile __data uint8_t		ao_adc_head;
 
 void ao_adc_isr(void) interrupt 1;
 void ao_adc_init(void);
 void ao_adc_poll(void);
 void ao_adc_get(__xdata struct ao_adc *packet);
 
+/* ao_beep.c */
+
+#define AO_BEEP_LOW	150
+#define AO_BEEP_MID	94
+#define AO_BEEP_HIGH	75
+#define AO_BEEP_OFF	0
+
+void
+ao_beep_init(void);
+
+void
+ao_beep(uint8_t beep);
+
+void
+ao_beep_for(uint8_t beep, uint16_t ticks);
+
+/* ao_led.c */
+
+#define AO_LED_NONE	0
+#define AO_LED_GREEN	1
+#define AO_LED_RED	2
+
+void
+ao_led_init(void);
+
+void
+ao_led_on(uint8_t colors);
+
+void
+ao_led_off(uint8_t colors);
+
+void
+ao_led_set(uint8_t colors);
+
+void
+ao_led_for(uint8_t colors, uint16_t ticks);
+
 #endif /* _AO_H_ */
diff --git a/ao_adc.c b/ao_adc.c
index d45e10b1..f043b5a1 100644
--- a/ao_adc.c
+++ b/ao_adc.c
@@ -18,8 +18,8 @@
 
 #include "ao.h"
 
-__xdata struct ao_adc	ao_adc_ring[ADC_RING];
-__data uint8_t		ao_adc_head;
+volatile __xdata struct ao_adc	ao_adc_ring[ADC_RING];
+volatile __data uint8_t		ao_adc_head;
 
 void ao_adc_isr(void) interrupt 1
 {
diff --git a/ao_beep.c b/ao_beep.c
new file mode 100644
index 00000000..ae5e36a6
--- /dev/null
+++ b/ao_beep.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+void
+ao_beep_init(void)
+{
+	/* Our beeper is on P2_0, which is hooked to timer 4 using
+	 * configuration alternative 2
+	 */
+	P2_0 = 0;
+	P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_GPIO;
+	PERCFG = (PERCFG & ~PERCFG_T4CFG_ALT_MASK) | PERCFG_T4CFG_ALT_2;
+	T4CCTL0 = TxCCTLy_CMP_TOGGLE|TxCCTLy_CMP_MODE_ENABLE;
+}
+
+void
+ao_beep(uint8_t beep)
+{
+	if (beep == 0) {
+		P2_0 = 0;
+		P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_GPIO;
+		T4CTL = 0;
+	} else {
+		P2SEL = (P2SEL & ~P2SEL_SELP2_0_MASK) | P2SEL_SELP2_0_PERIPHERAL;
+		T4CC0 = beep;
+		T4CTL = TxCTL_DIV_32 | TxCTL_MODE_MODULO | TxCTL_START;
+	}
+}
+
+void
+ao_beep_for(uint8_t beep, uint16_t ticks)
+{
+	ao_beep(beep);
+	ao_delay(ticks);
+	ao_beep(0);
+}
diff --git a/ao_led.c b/ao_led.c
new file mode 100644
index 00000000..c46e2eba
--- /dev/null
+++ b/ao_led.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+void
+ao_led_init(void)
+{
+	P1SEL &= ~3;
+	P1 &= ~3;
+	P1DIR |= 3;
+}
+
+void
+ao_led_on(uint8_t colors)
+{
+	P1 |= colors;
+}
+
+void
+ao_led_off(uint8_t colors)
+{
+	P1 &= ~colors;
+}
+
+void
+ao_led_set(uint8_t colors)
+{
+	P1 = (P1 & ~3) | colors;
+}
+
+void
+ao_led_for(uint8_t colors, uint16_t ticks)
+{
+	ao_led_on(colors);
+	ao_delay(ticks);
+	ao_led_off(colors);
+}
+
diff --git a/ao_task.c b/ao_task.c
index 0af5043c..a56fe29f 100644
--- a/ao_task.c
+++ b/ao_task.c
@@ -179,6 +179,11 @@ ao_wakeup(__xdata void *wchan)
 void
 ao_start_scheduler(void)
 {
+	ao_timer_init();
+	ao_adc_init();
+	ao_beep_init();
+	ao_led_init();
+
 	ao_cur_task_id = AO_NO_TASK;
 	ao_cur_task = NULL;
 	ao_yield();
diff --git a/ao_test.c b/ao_test.c
index 05245359..9a8adc3d 100644
--- a/ao_test.c
+++ b/ao_test.c
@@ -20,6 +20,7 @@
 struct ao_task __xdata blink_0_task;
 struct ao_task __xdata blink_1_task;
 struct ao_task __xdata wakeup_task;
+struct ao_task __xdata beep_task;
 
 void delay(int n) __reentrant
 {
@@ -34,8 +35,13 @@ static __xdata uint8_t blink_chan;
 void
 blink_0(void)
 {
+	uint8_t	b = 0;
 	for (;;) {
-		P1 ^= 1;
+		b = 1 - b;
+		if (b)
+			ao_led_on(AO_LED_GREEN);
+		else
+			ao_led_off(AO_LED_GREEN);
 		ao_sleep(&blink_chan);
 	}
 }
@@ -49,9 +55,9 @@ blink_1(void)
 		ao_sleep(&ao_adc_ring);
 		ao_adc_get(&adc);
 		if (adc.accel < 15900)
-			P1_1 = 1;
+			ao_led_on(AO_LED_RED);
 		else
-			P1_1 = 0;
+			ao_led_off(AO_LED_RED);
 	}
 }
 
@@ -59,26 +65,34 @@ void
 wakeup(void)
 {
 	for (;;) {
-		ao_delay(10);
+		ao_delay(AO_MS_TO_TICKS(100));
 		ao_wakeup(&blink_chan);
 	}
 }
 
 void
+beep(void)
+{
+	static struct ao_adc adc;
+
+	for (;;) {
+		ao_delay(AO_SEC_TO_TICKS(1));
+		ao_adc_get(&adc);
+		if (adc.temp > 7400)
+			ao_beep_for(AO_BEEP_LOW, AO_MS_TO_TICKS(50));
+	}
+}
+
+void
 main(void)
 {
 	CLKCON = 0;
 	while (!(SLEEP & SLEEP_XOSC_STB))
 		;
 
-	/* Set p1_1 and p1_0 to output */
-	P1DIR = 0x03;
-	
-	ao_adc_init();
-	ao_timer_init();
-
 	ao_add_task(&blink_0_task, blink_0);
 	ao_add_task(&blink_1_task, blink_1);
 	ao_add_task(&wakeup_task, wakeup);
+	ao_add_task(&beep_task, beep);
 	ao_start_scheduler();
 }