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

Add __attribute__((optimize("O2"))) to ws2812 module.

This commit is contained in:
vowstar 2015-06-20 01:40:45 +08:00
parent cda7992c1a
commit 3430e5f826
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

@ -16,13 +16,13 @@
// -- This WS2812 code must be compiled with -O2 to get the timing right. Read this:
// -- http://wp.josh.com/2014/05/13/ws2812-neopixels-are-not-so-finicky-once-you-get-to-know-them/
// -- The ICACHE_FLASH_ATTR is there to trick the compiler and get the very first pulse width correct.
static void ICACHE_FLASH_ATTR send_ws_0(uint8_t gpio) {
static void ICACHE_FLASH_ATTR __attribute__((optimize("O2"))) send_ws_0(uint8_t gpio){
uint8_t i;
i = 4; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TS_ADDRESS, 1 << gpio);
i = 9; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, 1 << gpio);
}
static void ICACHE_FLASH_ATTR send_ws_1(uint8_t gpio) {
static void ICACHE_FLASH_ATTR __attribute__((optimize("O2"))) send_ws_1(uint8_t gpio){
uint8_t i;
i = 8; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TS_ADDRESS, 1 << gpio);
i = 6; while (i--) GPIO_REG_WRITE(GPIO_OUT_W1TC_ADDRESS, 1 << gpio);