SunRed/Marlin-Artillery-M600
Archived
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Adjust for timing shift on Max7219 displays on AVR's

Browse source 
Something has shifted.   The previous timing delays on the Max7219 debug displays is too tight without this correction.
I suspect something has been optimized and roughly 50ns of needed setup and hold time has disappeared.
This corrects the issue and the display results are clean again.
This commit is contained in:
Roxy-3D 2020-03-24 17:08:31 -05:00 committed by GitHub
parent 68face848a
commit 5d515c3a2f
Signed by: GitHub
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
Marlin/src/feature/max7219.cpp
View file

@ -121,7 +121,7 @@ uint8_t Max7219::suspended; // = 0;
#define CRITICAL_SECTION_START() NOOP
#define CRITICAL_SECTION_END() NOOP
#else
#define SIG_DELAY() DELAY_NS(188) // Delay for 0.1875µs (16MHz AVR) or 0.15µs (20MHz AVR)
#define SIG_DELAY() DELAY_NS(250) // Delay for 0.1875µs (16MHz AVR) or 0.15µs (20MHz AVR)
#endif
void Max7219::error(const char * const func, const int32_t v1, const int32_t v2/*=-1*/) {