91 lines
3.1 KiB
Markdown
91 lines
3.1 KiB
Markdown
# BW12
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*by Ai-Thinker Co., Ltd.*
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[Product page](http://www.ai-thinker.com/pro_view-13.html)
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- [General info](../../docs/platform/realtek-amb/README.md)
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- [Flashing guide](../../docs/platform/realtek-ambz/flashing.md)
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- [Debugging](../../docs/platform/realtek-ambz/debugging.md)
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- [Vendor datasheet](https://docs.ai-thinker.com/_media/rtl8710/hardware/bw12_datasheet_en.pdf)
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Parameter | Value
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-------------|------------------------------------------
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Board code | `bw12`
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MCU | RTL8710BX
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Manufacturer | Realtek
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Series | AmebaZ
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Frequency | 62.5 MHz
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Flash size | 2 MiB
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RAM size | 256 KiB
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Voltage | 3.0V - 3.6V
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I/O | 11x GPIO, 6x PWM, 2x UART, 1x ADC
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Wi-Fi | 802.11 b/g/n
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FCC ID | [2ARI3-BW1X](https://fccid.io/2ARI3-BW1X)
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## Usage
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**Board code:** `bw12`
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In `platformio.ini`:
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```ini
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[env:bw12]
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platform = libretuya
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board = bw12
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framework = arduino
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```
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In ESPHome YAML:
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```yaml
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libretuya:
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board: bw12
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framework:
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version: dev
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```
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## Pinout
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## Arduino Core pin mapping
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No. | Pin | UART | I²C | SPI | PWM | Other
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----|------------|-----------|----------|----------------------|------|------
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D0 | PA05 | | | | PWM4 |
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D1 | PA29 | UART2_RX | I2C0_SCL | | PWM4 |
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D2 | PA00 | | | | PWM2 |
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D3 | PA19 | UART0_CTS | I2C0_SDA | SPI0_CS, SPI1_CS | |
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D4 | PA22 | UART0_RTS | I2C0_SCL | SPI0_MISO, SPI1_MISO | PWM5 |
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D5 | PA30 | UART2_TX | I2C0_SDA | | PWM4 |
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D6 | PA14 | | | | PWM0 | SWCLK
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D7 | PA12 | | | | PWM3 |
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D8 | PA15 | | | | PWM1 | SWDIO
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D9 | PA18 | UART0_RX | I2C1_SCL | SPI0_SCK, SPI1_SCK | |
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D10 | PA23 | UART0_TX | I2C1_SDA | SPI0_MOSI, SPI1_MOSI | PWM0 |
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A0 | PA19, ADC1 | | | | |
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## Flash memory map
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Flash size: 2 MiB / 2,097,152 B / 0x200000
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Hex values are in bytes.
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Name | Start | Length | End
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----------------|----------|-------------------|---------
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Boot XIP | 0x000000 | 16 KiB / 0x4000 | 0x004000
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Boot RAM | 0x004000 | 16 KiB / 0x4000 | 0x008000
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(reserved) | 0x008000 | 4 KiB / 0x1000 | 0x009000
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System Data | 0x009000 | 4 KiB / 0x1000 | 0x00A000
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Calibration | 0x00A000 | 4 KiB / 0x1000 | 0x00B000
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OTA1 Image | 0x00B000 | 468 KiB / 0x75000 | 0x080000
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OTA2 Image | 0x080000 | 468 KiB / 0x75000 | 0x0F5000
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Key-Value Store | 0x0F5000 | 24 KiB / 0x6000 | 0x0FB000
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User Data | 0x0FB000 | 1 MiB / 0x104000 | 0x1FF000
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RDP | 0x1FF000 | 4 KiB / 0x1000 | 0x200000
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RDP is most likely not used in Tuya firmwares, as the System Data partition contains an incorrect offset 0xFF000 for RDP, which is in the middle of OTA2 image.
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Additionally, Tuya firmware uses an encrypted KV or file storage, which resides at the end of flash memory. This seems to overlap system RDP area.
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