Skip to content

Generic - BK7252

by Generic

Product page

Parameter Value
Board code generic-bk7252
MCU BK7252
Manufacturer Beken
Series BK72XX
Frequency 180 MHz
Flash size 4 MiB
RAM size 512 KiB
Voltage 3.0V - 3.6V
I/O 38x GPIO, 4x PWM, 2x UART, 7x ADC
Wi-Fi 802.11 b/g/n
Bluetooth BLE v5.0

Usage

Board code: generic-bk7252

In platformio.ini:

[env:generic-bk7252]
platform = libretuya
board = generic-bk7252
framework = arduino

In ESPHome YAML:

libretuya:
  board: generic-bk7252
  framework:
    version: dev

Arduino Core pin mapping

No. Pin UART IĀ²C SPI PWM Other
D0 P0 UART2_TX I2C2_SCL
D1 P1 UART2_RX I2C2_SDA
D2 P2
D3 P3
D4 P4
D5 P5
D6 P6 PWM0
D7 P7 PWM1
D8 P10 UART1_RX
D9 P11 UART1_TX
D10 P12 UART1_CTS
D11 P13 UART1_RTS
D12 P14 SCK
D13 P15 CS
D14 P16 MOSI
D15 P17 MISO
D16 P18
D17 P19
D18 P20 I2C1_SCL TCK
D19 P21 I2C1_SDA TMS
D20 P22 TDI
D21 P23 TDO
D22 P24 PWM4
D23 P25
D24 P26 PWM5
D25 P27 DVP_MCLK
D26 P28
D27 P29 DVP_PCLK
D28 P30 DVP_HSYNC
D29 P31 DVP_VSYNC
D30 P32 DVP_PD0
D31 P33 DVP_PD1
D32 P34 DVP_PD2
D33 P35 DVP_PD3
D34 P36 DVP_PD4
D35 P37 DVP_PD5
D36 P38 DVP_PD6
D37 P39 DVP_PD7
A1 P4, ADC1
A2 P5, ADC2
A3 P23, ADC3
A4 P3, ADC5
A5 P2, ADC4
A6 P12, ADC6
A7 P13, ADC7

Flash memory map

Flash size: 4 MiB / 4,194,304 B / 0x400000

Hex values are in bytes.

Name Start Length End
Bootloader 0x000000 68 KiB / 0x11000 0x011000
App Image 0x011000 1.7 MiB / 0x1BA000 0x1CB000
File System 0x1CB000 1.1 MiB / 0x119000 0x2E4000
Key-Value Store 0x2E4000 32 KiB / 0x8000 0x2EC000
OTA Image 0x2EC000 1.1 MiB / 0x112000 0x3FE000
Calibration 0x3FE000 4 KiB / 0x1000 0x3FF000
TLV Store 0x3FF000 4 KiB / 0x1000 0x400000

Bootloader and app partitions contain CRC16 sums every 32 bytes. That results in the actual flash offsets/sizes not aligned to sector boundaries. To simplify calculations, the values shown in the table (extracted from bootloader's partition table) were aligned to 4096 bytes.