altos: Add lambdakey

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

1 files changed, 70 insertions, 0 deletions

diff --git a/src/lambdakey-v1.0/ao_lambdakey.c b/src/lambdakey-v1.0/ao_lambdakey.c
new file mode 100644
index 00000000..6ac78717
--- /dev/null
+++ b/src/lambdakey-v1.0/ao_lambdakey.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright © 2016 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.
+ */
+
+#include <ao.h>
+#include <ao_lisp.h>
+
+static uint16_t	blink_delay, blink_running;
+
+static void blink(void) {
+	blink_running = 1;
+	while (blink_delay) {
+		ao_led_on(AO_LED_RED);
+		ao_delay(blink_delay);
+		ao_led_off(AO_LED_RED);
+		ao_delay(blink_delay);
+	}
+	blink_running = 0;
+	ao_wakeup(&blink_running);
+	ao_exit();
+}
+
+struct ao_task blink_task;
+
+static void blink_cmd() {
+	ao_cmd_decimal();
+	blink_delay = ao_cmd_lex_i;
+	if (blink_delay && !blink_running)
+		ao_add_task(&blink_task, blink, "blink");
+	if (!blink_delay)
+		while (blink_running)
+			ao_sleep(&blink_running);
+}
+
+static void lisp_cmd() {
+	ao_lisp_read_eval_print();
+}
+
+static const struct ao_cmds blink_cmds[] = {
+	{ blink_cmd,	"b <delay, 0 off>\0Blink the green LED" },
+	{ lisp_cmd,	"l\0Run lisp interpreter" },
+	{ 0, 0 }
+};
+
+
+void main(void)
+{
+	ao_led_init(LEDS_AVAILABLE);
+	ao_clock_init();
+	ao_task_init();
+	ao_timer_init();
+	ao_dma_init();
+	ao_usb_init();
+	ao_serial_init();
+	ao_cmd_init();
+	ao_cmd_register(blink_cmds);
+	ao_start_scheduler();
+}
+
+