lba.gitea/WLED
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

optimization: only use "float" math functions

Browse Source 
- saves 5KB flash and some RAM
-allow to build with -D WLED_USE_UNREAL_MATH, to restore old behaviour and save another 6KB flash
This commit is contained in:
Frank 2023-10-01 19:04:30 +02:00
parent 166316e0c5
commit 1c3fdb73fb
2 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
platformio.ini
View File

@ -352,6 +352,7 @@ platform_packages = ${common.platform_packages}
board_build.ldscript = ${common.ldscript_1m128k} board_build.ldscript = ${common.ldscript_1m128k}
build_unflags = ${common.build_unflags} build_unflags = ${common.build_unflags}
build_flags = ${common.build_flags_esp8266} -D WLED_RELEASE_NAME=ESP01 -D WLED_DISABLE_OTA build_flags = ${common.build_flags_esp8266} -D WLED_RELEASE_NAME=ESP01 -D WLED_DISABLE_OTA
; -D WLED_USE_UNREAL_MATH ;; may cause wrong sunset/sunrise times, but saves 7064 bytes FLASH and 975 bytes RAM
lib_deps = ${esp8266.lib_deps} lib_deps = ${esp8266.lib_deps}
[env:esp07] [env:esp07]
@ -605,6 +606,7 @@ build_flags = ${common.build_flags} ${esp32s2.build_flags} -D WLED_RELEASE_NAME=
-DARDUINO_USB_DFU_ON_BOOT=0 -DARDUINO_USB_DFU_ON_BOOT=0
-DLOLIN_WIFI_FIX ; seems to work much better with this -DLOLIN_WIFI_FIX ; seems to work much better with this
-D WLED_USE_PSRAM -D WLED_USE_PSRAM
; -D WLED_USE_UNREAL_MATH ;; may cause wrong sunset/sunrise times, but saves 6792 bytes FLASH
-D WLED_WATCHDOG_TIMEOUT=0 -D WLED_WATCHDOG_TIMEOUT=0
-D CONFIG_ASYNC_TCP_USE_WDT=0 -D CONFIG_ASYNC_TCP_USE_WDT=0
-D LEDPIN=16 -D LEDPIN=16

17
wled00/ntp.cpp
View File

@ -2,6 +2,21 @@
#include "wled.h" #include "wled.h"
#include "fcn_declare.h" #include "fcn_declare.h"
// on esp8266, building with `-D WLED_USE_UNREAL_MATH` saves around 7Kb flash and 1KB RAM
// warning: causes errors in sunset calculations, see #3400
#if defined(WLED_USE_UNREAL_MATH)
#define sinf sin_t
#define asinf asin_t
#define cosf cos_t
#define acosf acos_t
#define tanf tan_t
#define atanf atan_t
#define fmodf fmod_t
#define floorf floor_t
#else
#include <math.h>
#endif
/* /*
* Acquires time from NTP server * Acquires time from NTP server
*/ */
@ -426,7 +441,7 @@ int getSunriseUTC(int year, int month, int day, float lat, float lon, bool sunse
float L = fmodf(M + (1.916f * sinf(DEG_TO_RAD*M)) + (0.02f * sinf(2*DEG_TO_RAD*M)) + 282.634f, 360.0f); float L = fmodf(M + (1.916f * sinf(DEG_TO_RAD*M)) + (0.02f * sinf(2*DEG_TO_RAD*M)) + 282.634f, 360.0f);
//5a. calculate the Sun's right ascension //5a. calculate the Sun's right ascension
float RA = fmodf(RAD_TO_DEG*atan(0.91764f * tan(DEG_TO_RAD*L)), 360.0f); float RA = fmodf(RAD_TO_DEG*atanf(0.91764f * tanf(DEG_TO_RAD*L)), 360.0f);
//5b. right ascension value needs to be in the same quadrant as L //5b. right ascension value needs to be in the same quadrant as L
float Lquadrant = floorf( L/90) * 90; float Lquadrant = floorf( L/90) * 90;