github/esphome
2
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-10-01 08:50:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

[core] Use constexpr for compile-time constants

Browse Source 
Replace const with constexpr for integer constants initialized
with literal values to enable compile-time evaluation.
This commit is contained in:
J. Nick Koston
2026-02-18 20:31:00 -06:00
parent 565443b710
commit cf2e9dfd11
3 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
esphome/core/helpers.cpp
+3 -3
View File
@@ -846,9 +846,9 @@ void IRAM_ATTR HOT delay_microseconds_safe(uint32_t us) {
// avoids CPU locks that could trigger WDT or affect WiFi/BT stability
uint32_t start = micros();
const uint32_t lag = 5000; // microseconds, specifies the maximum time for a CPU busy-loop.
// it must be larger than the worst-case duration of a delay(1) call (hardware tasks)
// 5ms is conservative, it could be reduced when exact BT/WiFi stack delays are known
constexpr uint32_t lag = 5000; // microseconds, specifies the maximum time for a CPU busy-loop.
// it must be larger than the worst-case duration of a delay(1) call (hardware tasks)
// 5ms is conservative, it could be reduced when exact BT/WiFi stack delays are known
if (us > lag) {
delay((us - lag) / 1000UL); // note: in disabled-interrupt contexts delay() won't actually sleep
while (micros() - start < us - lag)