MirrorSave
/
nodemcu-firmware
mirror of https://github.com/nodemcu/nodemcu-firmware.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #740 from Alkorin/ws2812 

Better timings for WS2812 (measured 345ns/695ns, instead of 340ns/600ns)
This commit is contained in:
Johny Mattsson 2015-11-11 21:09:31 +11:00
parent 63fad194e2 4fd552fcaf
commit 7ef1711e9a
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
app/modules/ws2812.c
View File

@ -31,8 +31,8 @@ static void ICACHE_RAM_ATTR ws2812_write(uint8_t pin, uint8_t *pixels, uint32_t
pixel = *p++; pixel = *p++;
mask = 0x80; mask = 0x80;
start_time = 0; start_time = 0;
t0h = (1000 * system_get_cpu_freq()) / 3333; // 0.30us (spec=0.35 +- 0.15) t0h = (1000 * system_get_cpu_freq()) / 3022; // 0.35us (spec=0.35 +- 0.15)
t1h = (1000 * system_get_cpu_freq()) / 1666; // 0.60us (spec=0.70 +- 0.15) t1h = (1000 * system_get_cpu_freq()) / 1477; // 0.70us (spec=0.70 +- 0.15)
ttot = (1000 * system_get_cpu_freq()) / 800; // 1.25us (MUST be >= 1.25) ttot = (1000 * system_get_cpu_freq()) / 800; // 1.25us (MUST be >= 1.25)
while (true) { while (true) {