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>
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
#ifndef _VARIANT_RUSSELL_
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#define _VARIANT_RUSSELL_
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#define USE_STM32WLx
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// I/O
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#define LED_POWER PA0 // Red LED
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#define LED_STATE_ON 1
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#define BUTTON_PIN PH3 // Shared with BOOT0
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#define BUTTON_NEED_PULLUP
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// Charger IC charge/standby pins are open-drain with no hardware pull-up:
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// Internal pull-up is needed on STM32 (TODO)
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// #define EXT_CHRG_DETECT PA5
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// #define EXT_PWR_DETECT PA4
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#define BATTERY_PIN AVBAT
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// ADC_MULTIPLIER: 3.0 = internal 1:3 bridge divider (DS13105§3.18.3)
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// Margin: 1.10 = AVBAT divider tolerance ±10% (Table 82)
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#define ADC_MULTIPLIER (1.01f * 3)
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/*
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Sample OCV curve for Li-SOCl2 primary lithium cells (e.g. Saft cells have fresh OCV of 3.67V)
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#define NUM_OCV_POINTS 11
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#define OCV_ARRAY 3670, 3650, 3630, 3610, 3590, 3560, 3530, 3480, 3400, 3200, 2500
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*/
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// Bosch Sensortec BME280
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#define HAS_SENSOR 1
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// CDtop CD-PA1010D
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#define ENABLE_HWSERIAL1
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#define PIN_SERIAL1_RX PB7
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#define PIN_SERIAL1_TX PB6
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#define HAS_GPS 1
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#define PIN_GPS_STANDBY PA15
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#define GPS_RX_PIN PB7
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#define GPS_TX_PIN PB6
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// LoRa
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/*
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* RAK3172 (-20–85°C) -> No TCXO
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* RAK3172-T (-40–85°C) -> 3.0V TCXO
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* https://github.com/RAKWireless/RAK-STM32-RUI/blob/e5a28be8fab1a492bd9223dd425ca33a8a297d90/variants/WisDuo_RAK3172-T_Board/radio_conf.h#L91
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*/
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#define TCXO_OPTIONAL
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#define SX126X_DIO3_TCXO_VOLTAGE 3.0
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// Required to avoid Serial1 conflicts due to board definition here:
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// https://github.com/stm32duino/Arduino_Core_STM32/blob/main/variants/STM32WLxx/WL54CCU_WL55CCU_WLE4C(8-B-C)U_WLE5C(8-B-C)U/variant_RAK3172_MODULE.h
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#define RAK3172
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#endif
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