TIM4 input clock is 72MHz.

1 files changed, 1 insertions, 1 deletions

diff --git a/ppmsum.cpp b/ppmsum.cpp
index 7b77036..3da7d78 100644
--- a/ppmsum.cpp
+++ b/ppmsum.cpp
@@ -41,7 +41,7 @@ void PPMSum::irq() {
 
 void PPMSum::enable() {
 	RCC.enable(RCC.TIM4);
-	TIM4.PSC = 36;
+	TIM4.PSC = 72;
 	TIM4.CCMR1 = 0x0201;
 	TIM4.SMCR = 0x54;
 	TIM4.CCER = 0x31;