mirror of
https://github.com/alexhopeoconnor/firmware.git
synced 2026-10-04 03:18:10 +10:00
Andrew Yong
026213aab7
Integrate STM32 battery monitoring into AnalogBatteryLevel, supporting external GPIO ADC pins as well as internal VBAT channel. Features: - ADC reading using STM32 LL (Lower Layer) macros supporting external ADC channels and internal VBAT channel (AVBAT) - ADC compensation using STM32 LL macros with factory-calibrated VREFINT (AVREF) for accurate voltage measurement - LFP battery OCV curve for STM32WL using AVBAT (STM32 VDD absolute maximum supply voltage 3.9V, direct connection of Li-Po batteries is not supported) Internal VBAT channel implemented in: - Russell - RAK3172 In these variants, ADC_MULTIPLIER = (1.01f * 3) = 3.30 as there is a 3:1 internal divider (DS13105 Rev 12 §5.3.21), and a bit of tolerance as the actual 10% spec leads to readings much too high. Assisted-by: Claude:sonnet-4-5 Signed-off-by: Andrew Yong <me@ndoo.sg>