rt-thread/bsp/rv32m1_vega

RISC-V RV32M1 VEGA Board BSP(Board Support Package) Execution Instruction

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Introduction

RV32M1_VEGA board is a heterogeneous multi-core RISC-V 32 development board that contains two RISC-V 32-bit cores, as well as BLE peripherals.

Hardware	Description
Chip Model	RV32M1
CPU	RV32IMC, with extensons for post-incrementing load and stores,
	multiply-accumulate extensions, ALU extensions, hardware loops.
	RV32IEMC
Main Frequency	48MHz or 72MHz
	48MHz or 72MHz
On-chip SRAM	256kB + 128kB
On-chip Flash	1MB + 256kB

Compilation

The toolchain currently used for test is built from the standard GNU GCC 7.2.0 and newlib 2.5.0 and for the standard RV32IMC architecture, so the extension instructions of RV32M1 is not supported, note that the version of RT-Thread ENV used in this BSP is 1.0.

It's recommended to use the env tool to compile programs on Windows. Switch to the directory bsp/rv32m1_vega/ri5cy in the console and run the following command to compile this BSP:

scons

If successfully compiled, a new 'rtthread.elf' and 'rtthread.bin' file will be generated. ‘rtthread.bin' needs to be burned to the device and run.

Burn and Execution

Please use JLink to connect to the JTAG interface of the RISC-V core on the RV32M1_VEGA board, and change the JLink driver to WinUSB mode. The JTAG interface is located next to the RV32M1 chip and the antenna seat, with a small 20pin JTAG interface.

Use a USB cable to connect to a USB port marked with SDA, then a serial device is recognized by PC, which can be opened with the configuration of 115200-N-8-1. The serial pins used by the device are: [PTC7/PTC8]

When the rtthread.bin image file is generated after being correctly compiled, you can use gdb to connect to openocd and burn it to flash with the load command.

For more information about how to use JTAG and how to use gdb to debug the RV32M1_VEGA development board, please refer to Development Environment Construction.

Running Results

When the compiling and burning are done correctly, press the reset button SW1 to reset the device, the startup message of RT-Thread can be observed via the serial port :

 \ | /
- RT -     Thread Operating System
 / | \     4.0.0 build Dec  5 2018
 2006 - 2018 Copyright by rt-thread team
File System initialized!
Hello RT-Thread!
msh />

Peripheral Condition

Drive	Support	Remark
UART	Support	UART0, RX(PTC7), TX(PTC8)
	Support	UART1, RX(PTA25), TX(PTA26)
clock	Support
GPIO	Support(The list may not complete, also you need to modify pinmux, clock according to the IO being used.)
MMC/SD	Support

IO mapping in BSP

IO Number	BSP Code Definition
PTA22	LED_BLUE
PTA23	LED_GREEN
PTA24	LED_RED
PTA24	LED_STS
PTA25	UART1_RX
PTA26	UART1_TX
PTE8	BTN_SW3
PTE9	BTN_SW4
PTE12	BTN_SW5
PTA0	BTN_SW2/BTN_NMI

References

• User Guide
• Chip [Reference Manual and Data Sheet](https://github.com/open-isa-org/open-isa.org/blob/master/Reference Manual and Data Sheet/RV32M1DS_Rev.1.1.pdf)
• open-isa