The MAIXDUINO runs fine with the sipeed_maix_bitm_defconfig but a different board id parameter should be passed to kflash.

Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- v2: describe why we use the same defconfig for multiple boards describe how to reset the board via DTR/RTS --- doc/board/sipeed/maix.rst | 75 ++++++++++++++++++++++++++++++++++----- 1 file changed, 66 insertions(+), 9 deletions(-)

diff --git a/doc/board/sipeed/maix.rst b/doc/board/sipeed/maix.rst index 06e0008b9f..c235cb44a8 100644 --- a/doc/board/sipeed/maix.rst +++ b/doc/board/sipeed/maix.rst @@ -1,8 +1,8 @@ .. SPDX-License-Identifier: GPL-2.0+ .. Copyright (C) 2020 Sean Anderson seanga2@gmail.com

-Maix Bit -======== +MAIX +====

Several of the Sipeed Maix series of boards cotain the Kendryte K210 processor, a 64-bit RISC-V CPU. This processor contains several peripherals to accelerate @@ -13,8 +13,10 @@ peripherals include 8M of SRAM (accessible with and without caching); remappable pins, including 40 GPIOs; AES, FFT, and SHA256 accelerators; a DMA controller; and I2C, I2S, and SPI controllers. Maix peripherals vary, but include spi flash; on-board usb-serial bridges; ports for cameras, displays, and sd cards; and -ESP32 chips. Currently, only the Sipeed Maix Bit V2.0 (bitm) is supported, but -the boards are fairly similar. +ESP32 chips. + +Currently, only the Sipeed MAIX BiT V2.0 (bitm) and Sipeed MAIXDUINO are +supported, but the boards are fairly similar.

Documentation for Maix boards is available from `Sipeed's website http://dl.sipeed.com/MAIX/HDK/`_. @@ -26,20 +28,42 @@ details are rather lacking, so most technical reference has been taken from the Build and boot steps --------------------

-To build u-boot, run +To build U-Boot, run

.. code-block:: none

- make sipeed_maix_bitm_defconfig + make <defconfig> make CROSS_COMPILE=<your cross compile prefix>

-To flash u-boot to a maix bit, run +To flash U-Boot, run

.. code-block:: none

- kflash -tp /dev/<your tty here> -B bit_mic u-boot-dtb.bin + kflash -tp /dev/<your tty here> -B <board_id> u-boot-dtb.bin + +The board provides two serial devices, e.g. + +* /dev/serial/by-id/usb-Kongou_Hikari_Sipeed-Debug_12345678AB-if00-port0 +* /dev/serial/by-id/usb-Kongou_Hikari_Sipeed-Debug_12345678AB-if01-port0 + +Which one is used for flashing depends on the board.

-Boot output should look like the following: +Currently only a small subset of the board features are supported. So we can +use the same default configuration and device tree. In the long run we may need +separate settings. + +======================== ========================== ========== ========== +Board defconfig board_id TTY device +======================== ========================== ========== ========== +Sipeed MAIX BiT sipeed_maix_bitm_defconfig bit first +Sipeed MAIX BiT with Mic sipeed_maix_bitm_defconfig bit_mic first +Sipeed MAIXDUINO sipeed_maix_bitm_defconfig maixduino first +Sipeed MAIX GO goE second +Sipeed MAIX ONE DOCK goD first +======================== ========================== ========== ========== + +Flashing causes a reboot of the device. Parameter -t specifies that the serial +console shall be opened immediately. Boot output should look like the following:

.. code-block:: none

@@ -238,6 +262,39 @@ Boot Sequence stage. 8. The boot hart jumps to ``0x80000000``.

+Resetting the board +^^^^^^^^^^^^^^^^^^^ + +The MAIX boards can be reset using the DTR and RTS lines of the serial console. +How the lines are used depends on the specific board. See the code of kflash.py +for details. + +This is the reset sequence for the MAXDUINO and MAIX BiT with Mic: + +.. code-block:: python + + def reset(self): + self.device.setDTR(False) + self.device.setRTS(False) + time.sleep(0.1) + self.device.setDTR(True) + time.sleep(0.1) + self.device.setDTR(False) + time.sleep(0.1) + +and this for the MAIX Bit: + +.. code-block:: python + + def reset(self): + self.device.setDTR(False) + self.device.setRTS(False) + time.sleep(0.1) + self.device.setRTS(True) + time.sleep(0.1) + self.device.setRTS(False) + time.sleep(0.1) + Memory Map ^^^^^^^^^^

-- 2.27.0