rooty/LibrePilot
1
0
Fork 0
mirror of https://bitbucket.org/librepilot/librepilot.git synced 2025-01-17 02:52:12 +01:00
Code Issues Releases Activity

ppm: adjust min frame pulse width for 8ch x 18ms frames

Browse Source 
All channels at max when using the FrSKY 4ch D4FR in PPM
mode results in the frame pulse shrinking well below our
threshold of 3800us and we lose frame.

With all 8 channels at max, the frame pulse becomes
indistinguishable from the other channels.  Using all 8
channels with the FrSKY in PPM mode is NOT recommended
even after this change.

Recommend using at most 7 active channels in this mode so
we can still find the frame pulse.
This commit is contained in:
Stacey Sheldon 2012-04-16 14:33:28 -04:00 committed by James Cotton
parent 1b07935201
commit 14cc9ef57c
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
flight/PiOS/STM32F10x/pios_ppm.c
View File

@ -44,7 +44,7 @@ const struct pios_rcvr_driver pios_ppm_rcvr_driver = {
#define PIOS_PPM_IN_MIN_NUM_CHANNELS 4
#define PIOS_PPM_IN_MAX_NUM_CHANNELS PIOS_PPM_NUM_INPUTS
#define PIOS_PPM_STABLE_CHANNEL_COUNT 25 // frames
#define PIOS_PPM_IN_MIN_SYNC_PULSE_US 3800 // microseconds
#define PIOS_PPM_IN_MIN_SYNC_PULSE_US 3000 // microseconds
#define PIOS_PPM_IN_MIN_CHANNEL_PULSE_US 750 // microseconds
#define PIOS_PPM_IN_MAX_CHANNEL_PULSE_US 2250 // microseconds