Lephenixnoir
/
PythonExtra
1
0
Fork 2
Code Issues 9 Pull Requests 3 Projects Releases 2 Wiki Activity

extmod/modonewire: Improve write timings for better reliability. 

When using long cables for sensors on onewire e.g. ds18b20, the current
default timings are too optimistic, leading to bus failures and CRC errors.

Stable results are achieved with the timings given by
https://www.analog.com/en/technical-articles/1wire-communication-through-software.html
This commit is contained in:
Elias Wimmer 2023-12-10 23:25:14 +01:00 committed by Damien George
parent 06df3b2925
commit 2e101a8e44
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
extmod/modonewire.c
View File

@ -41,8 +41,8 @@
#define TIMING_READ1 (6)
#define TIMING_READ2 (9)
#define TIMING_READ3 (55)
#define TIMING_WRITE1 (10)
#define TIMING_WRITE2 (50)
#define TIMING_WRITE1 (6)
#define TIMING_WRITE2 (54)
#define TIMING_WRITE3 (10)
STATIC int onewire_bus_reset(mp_hal_pin_obj_t pin) {