rusefi
/
wideband
mirror of https://github.com/rusefi/wideband.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

heater_control: smarter PWM duty limiting for VBat measurement (#196) 

Apply duty cycle limit only 2 cycles of 20 (per second). This
allows 100% duty PWM while heating sensor on low VBat.

(cherry picked from commit 28a01bd6c3dad0d0712a3b6412b9e87fe514555b)

Co-authored-by: Andrey Gusakov <dron0gus@gmail.com>
This commit is contained in:
rusefillc 2023-02-25 15:51:12 -04:00 committed by GitHub
parent a9bc33abbd
commit b5ed6d3af7
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
firmware/heater_control.cpp
View File

@ -76,6 +76,9 @@ struct heater_state {
int batteryStabTime;
float rampVoltage;
HeaterState heaterState;
#ifdef HEATER_MAX_DUTY
int cycle;
#endif
uint8_t ch;
uint8_t pwm_ch;
};
@ -271,8 +274,12 @@ static void HeaterThread(void*)
float duty = voltageRatio * voltageRatio;
#ifdef HEATER_MAX_DUTY
if (duty > HEATER_MAX_DUTY) {
duty = HEATER_MAX_DUTY;
s.cycle++;
// limit PWM each 10th cycle (2 time per second) to measure heater supply voltage throuth "Heater-"
if ((s.cycle % 10) == 0) {
if (duty > HEATER_MAX_DUTY) {
duty = HEATER_MAX_DUTY;
}
}
#endif