HPM6750EVK2

Tags: arch:riscv vendor:hpmicro experimental

More documentation about this board from the vendor can be found here.

Features

Dual-core MCU 816MHz
2MB on-chip RAM
256Mb SDRAM
1000Mbit Ethernet PHY
128Mb QSPI NOR flash
SD/eMMC interface
LCD connector
DVP camera connector
Audio mic input
3x USBC 2.0 connectors
Motor control expansion port

Buttons and LEDs

S1 dip switch:

OFF, OFF: boot from QSPI flash
OFF, ON: serial boot
ON, OFF: ISP

There are three buttons:

PBUTN (SW1): power button, TinyUF2 boot button, GPIO button
WBUTN (SW2): wake-up button
RESET (SW3): reset button

There is also an RGB LED.

Installation

Download and install the toolchain:

$ curl https://github.com/hpmicro/riscv-gnu-toolchain/releases/tag/2022.05.15

You will also need OpenOCD. Install hpmicro sdk_env and ensure that OpenOCD is in the path (sdk_env/tools/openocd).

Building NuttX

Note

If you want to switch the GNU riscv64 toolchain to the GNU riscv32 toolchain, you will need to select System type -> Toolchain Selection -> Generic GNU GNU RV32 toolchain in the Kconfig menu (make menuconfig). Make sure that the HPMicro GNU riscv32 toolchain is installed and in your PATH.

Flashing

Debug NuttX with OpenOCD and run:

$ picocom -b 115200 /dev/ttyACM0

When using fireDAP, the command is as follows (ensure sdk_env/hpm_sdk/boards/openocd is in your PATH):

$ openocd -f probes/cmsis_dap.cfg -f soc/hpm6750-single-core.cfg -f boards/hpm6750evk2.cfg

$ riscv32-unknown-elf-gdb ./nuttx
(gdb) target extended-remote [ip_addr]:3333
(gdb) load
(gdb) c

Configurations

To configure NuttX, you can use the following command in the NuttX directory:

$ ./tools/configure.sh hpm6750evk2:<config>

Where <config> is one the configurations listed below.

nsh

A simple configuration with the NSH shell.