From: Keith Packard <keithp@keithp.com>
Date: Sun, 10 Jan 2016 23:44:08 +0000 (-0800)
Subject: altos: Set TeleMega v2.0 PWM to support servos
X-Git-Tag: 1.6.2^2~10
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=4e29bcd07819415ebe44e22536305e9c51d9ae4c

altos: Set TeleMega v2.0 PWM to support servos

Typical servos use a 50Hz signal with less than 10% duty cycle. Set
the divider to 10 and the range to 64000 to provide a reasonable level
of detail down in the low range.

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

diff --git a/src/telemega-v2.0/ao_pins.h b/src/telemega-v2.0/ao_pins.h
index d796826c..a0c7cc46 100644
--- a/src/telemega-v2.0/ao_pins.h
+++ b/src/telemega-v2.0/ao_pins.h
@@ -387,10 +387,10 @@ struct ao_adc {
  */
 
 #define NUM_PWM			4
-#define PWM_MAX			1023
+#define PWM_MAX			64000
 #define AO_PWM_TIMER		stm_tim4
 #define AO_PWM_TIMER_ENABLE	STM_RCC_APB1ENR_TIM4EN
-#define AO_PWM_TIMER_SCALE	1
+#define AO_PWM_TIMER_SCALE	10
 
 #define AO_PWM_0_GPIO		(&stm_gpiod)
 #define AO_PWM_0_PIN		12