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boards: riscv: Introduce bl604e_iot_dvk
Add initial version. Signed-off-by: Gerson Fernando Budke <[email protected]>
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‎boards/bouffalolab/bl60x/bl604e_iot_dvk/Kconfig.bl604e_iot_dvk‎

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# Copyright (c) 2022-2025 ATL Electronics
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#
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# SPDX-License-Identifier: Apache-2.0
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config BOARD_BL604E_IOT_DVK
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select SOC_BL604E20Q2I

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/bl604e_iot_dvk-pinctrl.dtsi‎

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/*
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* Copyright (c) 2021-2025 ATL Electronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <dt-bindings/pinctrl/bl604x-pinctrl.h>
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&pinctrl {
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uart0_default: uart0_default {
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group1 {
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pinmux = <GPIO7_UART0_RX>,
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<GPIO16_UART0_TX>;
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bias-pull-up;
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input-schmitt-enable;
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};
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};
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uart0_sleep: uart0_sleep {
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group1 {
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pinmux = <GPIO7_UART0_RX>,
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<GPIO16_UART0_TX>;
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bias-high-impedance;
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};
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};
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};

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/bl604e_iot_dvk.dts‎

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/*
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* Copyright (c) 2022-2025 ATL Electronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/dts-v1/;
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#include <bouffalolab/bl60x.dtsi>
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#include "bl604e_iot_dvk-pinctrl.dtsi"
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/ {
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model = "BL604E IOT DVK development board";
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compatible = "bflb,bl604";
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chosen {
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zephyr,flash = &flash0;
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zephyr,itcm = &itcm;
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zephyr,dtcm = &dtcm;
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zephyr,sram = &sram0;
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zephyr,console = &uart0;
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zephyr,shell-uart = &uart0;
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};
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};
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&cpu0 {
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clock-frequency = <DT_FREQ_M(192)>;
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};
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&spi1 {
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x4000b000 0x1000 0x23000000 0xc00000>;
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flash0: flash@0 {
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compatible = "issi,is25lp128", "jedec,spi-nor";
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status = "disabled";
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size = <DT_SIZE_M(128)>;
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jedec-id = [96 60 18];
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reg = <0>;
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spi-max-frequency = <DT_FREQ_M(133)>;
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};
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};
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&uart0 {
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status = "okay";
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current-speed = <115200>;
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pinctrl-0 = <&uart0_default>;
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pinctrl-1 = <&uart0_sleep>;
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pinctrl-names = "default", "sleep";
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};

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/bl604e_iot_dvk.yaml‎

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# Copyright (c) 2022-2025 ATL Electronics
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#
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# SPDX-License-Identifier: Apache-2.0
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identifier: bl604e_iot_dvk
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name: BL604E IOT DVK development board
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type: mcu
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arch: riscv
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ram: 64
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toolchain:
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- zephyr
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testing:
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ignore_tags:
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- net
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- bluetooth
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supported:
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- pinctrl
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- uart
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vendor: bflb

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/bl604e_iot_dvk_defconfig‎

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# Copyright (c) 2022-2025 ATL Electronics
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#
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# SPDX-License-Identifier: Apache-2.0
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CONFIG_CONSOLE=y
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CONFIG_SERIAL=y
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CONFIG_UART_CONSOLE=y
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CONFIG_UART_BFLB=y

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/board.cmake‎

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# Copyright (c) 2022-2025 ATL Electronics
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#
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# SPDX-License-Identifier: Apache-2.0
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board_runner_args(openocd --cmd-pre-init "source [find bl60x.cfg]")
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board_runner_args(openocd --use-elf --no-load --no-init)
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board_runner_args(openocd --gdb-init "set mem inaccessible-by-default off")
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board_runner_args(openocd --gdb-init "set architecture riscv:rv32")
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board_runner_args(openocd --gdb-init "set remotetimeout 250")
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board_runner_args(openocd --gdb-init "set print asm-demangle on")
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board_runner_args(openocd --gdb-init "set backtrace limit 32")
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board_runner_args(openocd --gdb-init "mem 0x22008000 0x22014000 rw")
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board_runner_args(openocd --gdb-init "mem 0x42008000 0x42014000 rw")
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board_runner_args(openocd --gdb-init "mem 0x22014000 0x22020000 rw")
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board_runner_args(openocd --gdb-init "mem 0x42014000 0x42020000 rw")
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board_runner_args(openocd --gdb-init "mem 0x22020000 0x2203C000 rw")
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board_runner_args(openocd --gdb-init "mem 0x42020000 0x4203C000 rw")
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board_runner_args(openocd --gdb-init "mem 0x23000000 0x23400000 ro")
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include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)
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board_runner_args(blflash --port /dev/ttyACM0)
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include(${ZEPHYR_BASE}/boards/common/blflash.board.cmake)

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/board.yml‎

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board:
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name: bl604e_iot_dvk
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full_name: BL604E IOT DVK development board
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vendor: bflb
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socs:
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- name: bl604e20q2i

‎boards/bouffalolab/bl60x/bl604e_iot_dvk/doc/img/bl_604e.webp‎

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‎boards/bouffalolab/bl60x/bl604e_iot_dvk/doc/index.rst‎

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.. zephyr:board:: bl604e_iot_dvk
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Overview
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********
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BL602/BL604 is a Wi-Fi+BLE chipset introduced by Bouffalo Lab, which is used
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for low power consumption and high performance application development. The
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wireless subsystem includes 2.4G radio, Wi-Fi 802.11b/g/n and BLE 5.0
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baseband/MAC design. The microcontroller subsystem includes a 32-bit RISC CPU
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with low power consumption, cache and memory. The power management unit
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controls the low power consumption mode. In addition, it also supports
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various security features. The external interfaces include SDIO, SPI, UART,
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I2C, IR remote, PWM, ADC, DAC, PIR and GPIO.
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The BL602 Development Board features a SiFive E24 32 bit RISC-V CPU with FPU,
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it supports High Frequency clock up to 192Mhz, have 128k ROM, 276kB RAM,
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2.4 GHz WIFI 1T1R mode, support 20 MHz, data rate up to 72.2 Mbps, BLE 5.0
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with 2MB phy. It is a secure MCU which supports Secure boot, ECC-256 signed
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image, QSPI/SPI Flash On-The-Fly AES Decryption and PKA (Public Key
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Accelerator).
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Hardware
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********
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For more information about the Bouffalo Lab BL-60x MCU:
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- `Bouffalo Lab BL60x MCU Website`_
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- `Bouffalo Lab BL60x MCU Datasheet`_
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- `Bouffalo Lab Development Zone`_
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- `The RISC-V BL602 Book`_
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Supported Features
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==================
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The ``bl604e_iot_dvk`` board supports the following hardware features:
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+-----------+------------+-----------------------+
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| Interface | Controller | Driver/Component |
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+===========+============+=======================+
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| MTIMER | on-chip | RISC-V Machine Timer |
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+-----------+------------+-----------------------+
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| PINCTRL | on-chip | pin muxing |
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+-----------+------------+-----------------------+
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| UART | on-chip | serial port-polling; |
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| | | serial port-interrupt |
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+-----------+------------+-----------------------+
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The default configuration can be found in the Kconfig
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:zephyr_file:`boards/bouffalolab/bl60x/bl604e_iot_dvk/bl604e_iot_dvk_defconfig`.
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System Clock
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============
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The BL604E Development Board is configured to run at max speed (192MHz).
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Serial Port
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===========
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The ``bl604e_iot_dvk`` board uses UART0 as default serial port. It is connected
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to USB Serial converter and port is used for both program and console.
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Programming and Debugging
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*************************
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BL Flash tool
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=============
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The BL-60x has a ROM bootloader that allows user flash device by serial port.
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There are some tools available at internet and this will describe one of them.
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The below guide was created based on RISC-V BL602 Book, chapter 3
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`Flashing Firmware to BL602`_.
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#. `Install Rustup`_
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#. Install cargo
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.. code-block:: console
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$ sudo apt-get install cargo
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#. Clone blflash rust version
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.. code-block:: console
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$ git clone --recursive https://github.com/spacemeowx2/blflash
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#. Build blflash
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.. code-block:: console
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$ cd blflash
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$ cargo build --release
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#. Install blflash. The recommended use is copy to home folder
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.. code-block:: console
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$ cp target/release/blflash ~/bin/
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#. Test
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.. code-block:: console
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$ blflash -V
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It will print blflash version
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.. code-block:: console
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$ blflash 0.3.5
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Samples
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=======
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#. Build the Zephyr kernel and the :zephyr:code-sample:`hello_world` sample
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application:
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.. zephyr-app-commands::
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:zephyr-app: samples/hello_world
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:board: bl604e_iot_dvk
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:goals: build
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:compact:
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#. To flash an image using blflash runner:
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#. Press BOOT button
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#. Press and release RST button
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#. Release BOOT button
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.. code-block:: console
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west flash -r blflash
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#. Run your favorite terminal program to listen for output. Under Linux the
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terminal should be :code:`/dev/ttyACM0`. For example:
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.. code-block:: console
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$ minicom -D /dev/ttyACM0 -o
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The -o option tells minicom not to send the modem initialization
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string. Connection should be configured as follows:
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- Speed: 115200
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- Data: 8 bits
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- Parity: None
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- Stop bits: 1
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Then, press and release RST button
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.. code-block:: console
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*** Booting Zephyr OS build v3.7.0-3255-g6e0fa5c1c77a ***
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Hello World! bl604e_iot_dvk/bl604e20q2i
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Congratulations, you have ``bl604e_iot_dvk`` configured and running Zephyr.
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.. _Bouffalo Lab BL60x MCU Website:
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https://en.bouffalolab.com/product/?type=detail&id=6
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.. _Bouffalo Lab BL60x MCU Datasheet:
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https://github.com/bouffalolab/bl_docs/tree/main/BL602_DS/en
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.. _Bouffalo Lab Development Zone:
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https://dev.bouffalolab.com/home?id=guest
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.. _Install Rustup:
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https://rustup.rs/
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.. _The RISC-V BL602 Book:
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https://lupyuen.github.io/articles/book
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.. _Flashing Firmware to BL602:
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https://lupyuen.github.io/articles/book#flashing-firmware-to-bl602

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