STM32 ppm decoder. More...

Macros
#define	RC_PPM_TICKS_PER_USEC 6
	The ppm counter is set-up to have 1/6 us resolution. More...

#define	RC_PPM_TICKS_OF_USEC(_v) ((_v)*RC_PPM_TICKS_PER_USEC)

#define	RC_PPM_SIGNED_TICKS_OF_USEC(_v) (int32_t)((_v)*RC_PPM_TICKS_PER_USEC)

#define	USEC_OF_RC_PPM_TICKS(_v) ((_v)/RC_PPM_TICKS_PER_USEC)

Detailed Description

STM32 ppm decoder.

Definition in file ppm_arch.h.

Macro Definition Documentation

◆ RC_PPM_SIGNED_TICKS_OF_USEC

#define RC_PPM_SIGNED_TICKS_OF_USEC ( _v ) (int32_t)((_v)*RC_PPM_TICKS_PER_USEC)

Definition at line 46 of file ppm_arch.h.

◆ RC_PPM_TICKS_OF_USEC

#define RC_PPM_TICKS_OF_USEC ( _v ) ((_v)*RC_PPM_TICKS_PER_USEC)

Definition at line 45 of file ppm_arch.h.

◆ RC_PPM_TICKS_PER_USEC

#define RC_PPM_TICKS_PER_USEC 6

The ppm counter is set-up to have 1/6 us resolution.

The timer clock frequency (before prescaling): STM32F1: TIM1 -> APB2 = HCLK = 72MHz TIM2 -> 2 * APB1 = 2 * 36MHz = 72MHz STM32F4: TIM1 -> 2 * APB2 = 2 * 84MHz = 168MHz TIM2 -> 2 * APB1 = 2 * 42MHz = 84MHz

Definition at line 43 of file ppm_arch.h.

◆ USEC_OF_RC_PPM_TICKS

#define USEC_OF_RC_PPM_TICKS ( _v ) ((_v)/RC_PPM_TICKS_PER_USEC)