Reduce panda power usage#2340
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Can we also store a reset count or some other debug info in memory? |
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There is a 32bit RTC backup register that could be used for saving a reset counter, it resets on VBAT power loss. |
This reverts commit 3b954b9.
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NVIC_SystemReset wrapper and save reset counter is a good separate PR. |
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* add bootkick for ship mode * boot standby * comment * stop mode * fix som status * exti wakeup * all standby * clean * analog mode * adc * clean * HSI * stop only cuatro * comments * UM2331 * rm * comment * enforce SAFETY_SILENT * clean * misra * rm * disable pulls * assert * Revert "disable pulls" This reverts commit 3b954b9. * pull note * add stop mode USB cmd * add stop mode to HITL * fix * async stop mode request * test all harness/ign configs * more time * use uptime * print debug * unstuck * show prints * more * logger * loglevel * log * uptime test * tighter timing * print wakeout source * rm debug * clean * robust * add CAN2 * test more cans * clean * more * longer * multiple * more * can1 * reorder * normal * clean * partial * clean * test * time * delay * reset * setup * reset * revert * silent * fix ordering * no random * warnings * err * timings * heartbeat * time * faster * can1 * simpler * test 20x * put back random * clean * comment * jenkinsfile * final
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* single header for all drivers (commaai#2335) * drivers.h, claude's try * include from root * fix mac * organize a lil more * Move system stuff to sys/ (commaai#2337) * Move system stuff to sys/ * move power saving * clean up * cleanup unused defines in drivers.h (commaai#2336) * Bootkick ship mode (commaai#2330) * add bootkick for ship mode * boot standby * comment * No more VBAT_EN (commaai#2339) this pin is not connected anymore * Reduce panda power usage (commaai#2340) * add bootkick for ship mode * boot standby * comment * stop mode * fix som status * exti wakeup * all standby * clean * analog mode * adc * clean * HSI * stop only cuatro * comments * UM2331 * rm * comment * enforce SAFETY_SILENT * clean * misra * rm * disable pulls * assert * Revert "disable pulls" This reverts commit 3b954b9. * pull note * add stop mode USB cmd * add stop mode to HITL * fix * async stop mode request * test all harness/ign configs * more time * use uptime * print debug * unstuck * show prints * more * logger * loglevel * log * uptime test * tighter timing * print wakeout source * rm debug * clean * robust * add CAN2 * test more cans * clean * more * longer * multiple * more * can1 * reorder * normal * clean * partial * clean * test * time * delay * reset * setup * reset * revert * silent * fix ordering * no random * warnings * err * timings * heartbeat * time * faster * can1 * simpler * test 20x * put back random * clean * comment * jenkinsfile * final * Remove python3 and gcc@13 installation for macOS (commaai#2343) * sync device time before git checkout in CI (commaai#2344) * vendor the compiler toolchain (commaai#2342) * use vendored cppcheck from dependencies repo (commaai#2347) * measure sound output level (commaai#2354) * measure sound output level * average instead * this was wrong * fix calc? * try vu meter * abs per buf * more testing * debug * debug2 * debug3 * reset to 0 * fix parsing bug * fix parsing bug * this works * minor cleanup * fix misra * docs * Don't overflow the mic filter (commaai#2352) don't overflow the filter * Remove FINAL_PROVISIONING firmware variant (commaai#2358) * Remove FINAL_PROVISIONING firmware path and CI usage * Remove remaining FINAL_PROVISIONING references from CI * why do i even try codex * build system simplifications (commaai#2359) * buidl system simplifications * less j * fix that * make test_misra.sh a lil nicer to run * Revert "make test_misra.sh a lil nicer to run" This reverts commit 16a8e52. * don't install spidev on PC (commaai#2360) * don't install spidev on PC * ugh base ubuntu * install libusb from pip (commaai#2351) * install libusb from pip Use libusb-package to bundle libusb as a Python dependency instead of requiring it as a system package. This simplifies setup on all platforms. Co-Authored-By: Claude Opus 4.6 <[email protected]> * fix agnos --------- Co-authored-by: Claude Opus 4.6 <[email protected]> * document structs inline (commaai#2362) * inline CAN docs * document structs inline * lil more * mv crypto/ and certs/ into board/ (commaai#2363) * run all tests in test.sh (commaai#2364) * rm tres bootkick tests (commaai#2365) --------- Co-authored-by: Adeeb Shihadeh <[email protected]> Co-authored-by: Daniel Koepping <[email protected]> Co-authored-by: Robbe Derks <[email protected]> Co-authored-by: Claude Opus 4.6 <[email protected]>
mmoo758
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This was referenced May 21, 2026
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Panda Power Optimization
Reduces OBD-C port power by 77% (225 mW -> 52 mW) in low power state.
The panda STM32H7 MCU on comma four runs at 240 MHz on VOS1 voltage scaling. In its stock configuration with all peripheral clocks enabled it draws 225 mW in low power state.
This can be reduced to 52 mW in 3 main steps:
Each optimization was measured individually on comma four hardware.
SIL2 considerations:
Stop mode is only entered from SAFETY_SILENT when no safety function is active, fulfilling rule CoU_3 of UM2331.