altos: add 'vidtime', a simple brightness monitor

[fw/altos] / src / vidtime / ao_vidtime.c

diff --git a/src/vidtime/ao_vidtime.c b/src/vidtime/ao_vidtime.c
new file mode 100644 (file)
index 0000000..e7f2c21
--- /dev/null
+++ b/src/vidtime/ao_vidtime.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright © 2012 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; version 2 of the License.
+ *
+ * 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>
+#include <ao_exti.h>
+
+static uint8_t sensor_value;
+static uint8_t vidtime_monitor;
+
+static void
+vidtime(void)
+{
+       ao_exti_enable(AO_SENSOR_PORT, AO_SENSOR_PIN);
+       for (;;) {
+               while (!vidtime_monitor)
+                       ao_sleep(&vidtime_monitor);
+               ao_sleep(&sensor_value);
+               printf("%d\n", sensor_value);
+               flush();
+       }
+}
+
+static void
+sensor_interrupt(void)
+{
+       uint8_t new = ao_gpio_get(AO_SENSOR_PORT, AO_SENSOR_PIN, foo);
+
+#if 0
+       if (new)
+               ao_exti_set_mode(AO_SENSOR_PORT, AO_SENSOR_PIN,
+                                AO_EXTI_MODE_FALLING);
+       else
+               ao_exti_set_mode(AO_SENSOR_PORT, AO_SENSOR_PIN,
+                                AO_EXTI_MODE_RISING);
+#endif
+       if (new != sensor_value) {
+               sensor_value = new;
+               ao_wakeup(&sensor_value);
+       }
+}
+
+static struct ao_task  vidtime_task;
+
+static void
+ao_init_vidtime(void)
+{
+       ao_enable_port(AO_SENSOR_PORT);
+       ao_exti_setup(AO_SENSOR_PORT, AO_SENSOR_PIN,
+                     AO_EXTI_MODE_RISING|
+                     AO_EXTI_MODE_FALLING|
+                     AO_EXTI_MODE_PULL_NONE|
+                     AO_EXTI_PRIORITY_MED,
+                     sensor_interrupt);
+       ao_add_task(&vidtime_task, vidtime, "vidtime");
+}
+
+static void
+ao_set_vidtime(void)
+{
+       ao_cmd_decimal();
+       if (ao_cmd_status == ao_cmd_success) {
+               vidtime_monitor = ao_cmd_lex_i != 0;
+               ao_wakeup(&vidtime_monitor);
+       }
+}
+
+const struct ao_cmds   ao_vidtime_cmds[] = {
+       { ao_set_vidtime, "V <0 off, 1 on>\0Enable/disable timing monitor" },
+       { 0, NULL }
+};
+
+void main(void)
+{
+       ao_clock_init();
+
+       ao_task_init();
+
+       ao_timer_init();
+
+       ao_dma_init();
+
+       ao_init_vidtime();
+
+       ao_usb_init();
+
+       ao_cmd_init();
+
+       ao_cmd_register(&ao_vidtime_cmds[0]);
+
+       ao_start_scheduler();
+}