jeans/WLED
jeans/WLED
1
0
Fork 0
mirror of https://github.com/wled/WLED.git synced 2025-07-19 00:36:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

ESP8266PWM: Annotate sources

Browse Source 
Add additional clarification as to the original source URL and the
specific local patches.
This commit is contained in:
Will Miles 2024-07-12 19:16:31 -04:00
parent ff39a8db3f
commit 2fc2f47d06
1 changed files with 6 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
lib/ESP8266PWM/src/core_esp8266_waveform_pwm.cpp
View File

@ -1,6 +1,8 @@
/* esp8266_waveform imported from platform source code
Modified for WLED to work around a fault in the NMI handling,
which can result in the system locking up and hard WDT crashes.
Imported from https://github.com/esp8266/Arduino/blob/7e0d20e2b9034994f573a236364e0aef17fd66de/cores/esp8266/core_esp8266_waveform_pwm.cpp
*/
/*
@ -497,6 +499,7 @@ static inline IRAM_ATTR uint32_t earliest(uint32_t a, uint32_t b) {
return (da < db) ? a : b;
}
// ----- @willmmiles begin patch -----
// NMI crash workaround
// Sometimes the NMI fails to return, stalling the CPU. When this happens,
// the next NMI gets a return address /inside the NMI handler function/.
@ -519,6 +522,7 @@ static inline IRAM_ATTR void nmiCrashWorkaround() {
__asm__ __volatile__("wsr %0,epc3; wsr %1,eps3"::"a"(epc3_backup),"a"(eps3_backup));
}
}
// ----- @willmmiles end patch -----
// The SDK and hardware take some time to actually get to our NMI code, so
@ -540,7 +544,9 @@ static inline IRAM_ATTR void nmiCrashWorkaround() {
#define MINIRQTIME microsecondsToClockCycles(6)
static IRAM_ATTR void timer1Interrupt() {
// ----- @willmmiles begin patch -----
nmiCrashWorkaround();
// ----- @willmmiles end patch -----
// Flag if the core is at 160 MHz, for use by adjust()
bool turbo = (*(uint32_t*)0x3FF00014) & 1 ? true : false;