From d40fb96fcf6b7415c445df036641ebd1fa00e55c Mon Sep 17 00:00:00 2001
From: Piotr Esden-Tempski <piotr@esden.net>
Date: Mon, 31 Jan 2011 22:08:37 -0800
Subject: [PATCH] Added set prescaler and set repetition counter functions to
 timer.

---
 examples/stm32/stm32-h103/pwm_6step/pwm_6step.c |  9 ++++++---
 include/libopencm3/stm32/timer.h                |  2 ++
 lib/stm32/timer.c                               | 13 +++++++++++++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/examples/stm32/stm32-h103/pwm_6step/pwm_6step.c b/examples/stm32/stm32-h103/pwm_6step/pwm_6step.c
index 505b3c83..bda8ff79 100644
--- a/examples/stm32/stm32-h103/pwm_6step/pwm_6step.c
+++ b/examples/stm32/stm32-h103/pwm_6step/pwm_6step.c
@@ -124,9 +124,6 @@ void tim_setup(void)
 	/* Reset TIM1 peripheral */
 	timer_reset(TIM1);
 
-	/* Clock division. */
-	timer_set_clock_division(TIM1, TIM_CR1_CKD_CK_INT);
-
 	/* Timer global mode:
 	 * - No divider
 	 * - alignment edge
@@ -136,6 +133,12 @@ void tim_setup(void)
 		       TIM_CR1_CMS_EDGE,
 		       TIM_CR1_DIR_UP);
 
+	/* Reset prescaler value. */
+	timer_set_prescaler(TIM1, 0);
+
+	/* Reset repetition counter value. */
+	timer_set_repetition_counter(TIM1, 0);
+
 	/* Enable preload. */
 	timer_enable_preload(TIM1);
 
diff --git a/include/libopencm3/stm32/timer.h b/include/libopencm3/stm32/timer.h
index b11802e2..4ba3c985 100644
--- a/include/libopencm3/stm32/timer.h
+++ b/include/libopencm3/stm32/timer.h
@@ -883,6 +883,8 @@ void timer_enable_compare_control_update_on_trigger(u32 timer_peripheral);
 void timer_disable_compare_control_update_on_trigger(u32 timer_peripheral);
 void timer_enable_preload_complementry_enable_bits(u32 timer_peripheral);
 void timer_disable_preload_complementry_enable_bits(u32 timer_peripheral);
+void timer_set_prescaler(u32 timer_peripheral, u32 value);
+void timer_set_repetition_counter(u32 timer_peripheral, u32 value);
 void timer_set_period(u32 timer_peripheral, u32 period);
 void timer_enable_oc_clear(u32 timer_peripheral, enum tim_oc_id oc_id);
 void timer_disable_oc_clear(u32 timer_peripheral, enum tim_oc_id oc_id);
diff --git a/lib/stm32/timer.c b/lib/stm32/timer.c
index 9a6534d1..827cde0e 100644
--- a/lib/stm32/timer.c
+++ b/lib/stm32/timer.c
@@ -253,6 +253,19 @@ void timer_disable_preload_complementry_enable_bits(u32 timer_peripheral)
 	TIM_CR2(timer_peripheral) &= ~TIM_CR2_CCPC;
 }
 
+void timer_set_prescaler(u32 timer_peripheral, u32 value)
+{
+	TIM_PSC(timer_peripheral) = value;
+}
+
+void timer_set_repetition_counter(u32 timer_peripheral, u32 value)
+{
+	if ((timer_peripheral == TIM1) ||
+	    (timer_peripheral == TIM8)) {
+		TIM_RCR(timer_peripheral) = value;
+	}
+}
+
 void timer_set_period(u32 timer_peripheral, u32 period)
 {
 	TIM_ARR(timer_peripheral) = period;