rt-thread/bsp/avr32/at32uc3a0256

SimpleMachines' Mizar32 Development Board

Introduction

The Mizar32 is a 32-bit computer based on the AVR32 processor. It is clocked at 66MHz and has 32MB of main memory. It supports mass storage on SD card, a USB connector, an on-board LED, two buttons, a JTAG port and six bus connectors.

The bus connectors let you add other stackable hardware modules such as serial ports, ethernet, a 16x2 character LCD display and a VGA/keyboard/mouse/audio board based on the 8-core Parallax Propeller processor.

The Mizar32 is designed by SimpleMachines, Italy.

This board support package aims at adding RT-Thread support for the following Mizar32 development boards.

Model	Flash	SRAM	SDRAM
Mizar32-A	512KB	64KB	32MB
Mizar32-B	256KB	64KB	32MB
Mizar32-C	128KB	64KB	32MB

Specification

• Main processor: AVR32 UC3A0 @ 66 MHz
• Internal fast SRAM: 32KB or 64KB with single-cycle access time
• On-board SDRAM: 32MB with 2-cycle access time
• Internal Flash memory: 128/256/512KB with single-cycle access time
• External Flash memory: up to 4GB on micro SD card.
• Internal operating Voltage: 3.3V with 5V input tolerant I/O
• Digital I/O Pins: 66
• Timer/Counter: 3 channel, 16-bit.
• Analog-to-Digital input pins: 8 with 10-bit resolution measuring 0-3.3v at up to 384,000 samples per second
• Stereo audio bitstream Digital-to-Analog Converter with 16 bit resolution at up to 48kHz
• Pulse Width Modulation channels (PWM): 7
• Universal Sync/Async RX/TX (USART): 2
• Serial Periperal Interface (SPI): 2
• Two-Wire Interface (TWI): 1, I2C-compatible at up to 400kbit/s
• Universal Serial Bus (USB): 1 OTG host with dedicated cable.
• Debug Port: JTAG connector
• Ethernet MAC 10/100: 1 (requires add-on hardware module)
• Oscillators: 2 (12MHz and 32768Hz)
• Buttons: Reset button, user button
• LEDs: Power LED, User LED
• Power supply: 5V USB or 7.5V-35V DC, 80mA (base board) to 222mA (with all add-on modules)
• Dimensions: 96,5mm x 63,5mm
• Weight: 42.5 grams
• Temperature range: -45 to +85°C

Embedded Hardware Interfaces

• MicroSD
• USB
• JTAG
• Add-on bus connectors 1-6 interfaces on the Add-on Bus
• 12 General Purpose I/O pins
• 2 UARTs: one basic, one with modem control signals
• 2 SPI
• I2C interface with 2-way splitter
• 8 ADC inputs
• 3 high-resolution timers
• Ethernet

Optional Stacked Modules

This README is essentially a work-in-progress. I will try to further and documentation as and when I further the device driver base for the Mizar32 target.

If you feel like reaching out to me for questions pertaining to the target development board, you can write to me: ramangopalan AT gmail dot com.

Supported compiler

This BSP is built with the AVR32 GCC that comes with the Microchip Studio. I am using the Microchip Studio version 7.0.2594. Make sure that avr32-gcc.exe is visible on your command line. Add the binary directory to you PATH.

I use Git Bash (Windows) for compiling the RT-Thread system. Once you set your path correctly, invoke Git Bash to query avr32-gcc.exe's version. The output should look similar to this:

$ avr32-gcc.exe --version
avr32-gcc.exe (AVR_32_bit_GNU_Toolchain_3.4.2_435) 4.4.7
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

If you see this, you're all set to compile RT-Thread for Mizar32.

Program firmware

Step 1: download the RT-Thread codebase and navigate to bsp/avr32uc3a0.

$ cd bsp/avr32uc3a0/

Step 2: build

scons -c
scons

Step 3: flash

If everything went well, scons should have generated an elf file: rtthread-uc3a0256.elf. Let us program the file. The program 'atprogram' comes with Microchip Studio. I didn't have to do much here. Just make sure `atprogram.exe' is in your PATH.

atprogram -t atmelice -i jtag -d at32uc3a0256 program -f rtthread-uc3a0256.elf

Note that you should already see the on-board LED (PB29) blink if your programming was successful. I use the Atmel ICE programmer. To access msh with the default menuconfig's configuration, you'll need the VGA shield. Connect the target board to a 12 VDC wall adapter. Also connect the shield to a VGA monitor and a PS/2 keyboard.

Running Result

The output information on serial port for `ps' the command should look like this:

0x000003c0 tidle0    31  ready   0x00000054 0x00000100    67%   0x00000009 OK
0x00001650 tshell    20  running 0x000000b4 0x00001000    13%   0x0000000a OK
0x00001350 led1       5  suspend 0x0000007c 0x00000400    12%   0x00000005 EINTRPT

Here is a picture of the RT-Thread session on the VGA monitor:

Peripheral Support

Drive	Support	Remark
UART	Support	UART0/1
GPIO	Support	-
I2C	-	-
RTC	-	-
SPI	-	-
TIMER	-	-
WDT	-	-