1 files changed, 82 insertions, 0 deletions
diff --git a/firmware/e300/battery/timer.c b/firmware/e300/battery/timer.c
new file mode 100644
index 000000000..1e87e30bf
--- /dev/null
+++ b/firmware/e300/battery/timer.c
@@ -0,0 +1,82 @@
+/* USRP E310 Firmware Timer driver
+ * Copyright (C) 2014 Ettus Research
+ * This file is part of the USRP E310 Firmware
+ * The USRP E310 Firmware 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.
+ * The USRP E310 Firmware 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 the USRP E310 Firmware. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <avr/io.h>
+
+#include "timer.h"
+#include "utils.h"
+
+
+static const uint8_t TIMER0_OFF_MASK = 0xf8;
+static const uint8_t TIMER1_OFF_MASK = 0xf8;
+
+void timer0_init(void)
+{
+	/* ctc mode */
+	TCCR0A = BIT(CTC0);
+
+	/* 250 ms with 1024 prescale @ 1 MHz */
+	OCR0A = 244;//244;
+
+	/* ctc mode */
+	TIMSK0 = BIT(OCIE0A);
+}
+
+void timer0_start(void)
+{
+	TCNT0 = 0x00;
+	/* set prescaler to 1024 */
+	TCCR0A |= BIT(CS02) | BIT(CS00);
+}
+
+void timer0_stop(void)
+{
+	/* mask out all the bits to stop */
+	TCCR0A &= TIMER0_OFF_MASK;
+}
+
+void timer1_init(void)
+{
+	/* set counter register to 0 */
+	TCNT1 = 0x0;
+
+	/* ctc mode */
+	TCCR1B = BIT(WGM12);
+
+	/* hold button for roughly 2 seconds
+	 * value is calculated as follows:
+	 * val = 2 * f_clk / (prescaler * f_irq) - 1
+	 */
+	OCR1A = 7811 * 2;
+
+	/* enable CTC on timer 1 */
+	TIMSK1 = BIT(OCIE1A);
+}
+
+void timer1_start(void)
+{
+	/* reset counter register */
+	TCNT1 = 0x0000;
+
+	/* set prescaler to 1024 */
+	TCCR1B |= BIT(CS12) | BIT(CS10);
+}
+
+void timer1_stop(void)
+{
+	/* mask out all the bits to stop */
+	TCCR1B &= TIMER1_OFF_MASK;
+}
+