Until now I always developed code for the Olimex board MSP430F169 LCD using an open source compiler (GNU) and using a parallel port->JTAG adapter to program the board and do some debug.
That requires a computer with parallel port.
The goal of this article is to see if is possible to use an USB->JTAG adapter or using the Spy-by-wire connection.
The Olimex MSP430f169 LCD board can be debugged/handled only using a JTAG interface, i.e. it doesn't support Spi2wire.
The original JTAG interface used is a parallel port based and this is creating limits on the choice of the development machine.
The alternative is to use a USB->JTAG interface.
In that way is possible to use every PC with a USB port free, laptop included.
Exists on the market some USB->JTAG interfaces for the MSP430, but they are quite pricey (70$ to 150$).
Before to buy one of these, this article try to explore the possibility to use a more cheaper USB->JTAG dongle, based on the OpenJTAG project.
The OpenJTAG project is an open source project to handle a USB -> JTAG high speed interface for different microcontroller/microprocessors boards.
The OpenOCD project is an open source project to support on-chip debug capabilities.
IT can be linked to the OpenJTAG project for some processors.
The hardware is based on a USB->JTAG dongle received with a FriendlyARM board.
Here some data about the hardware I have available and I will try to use.
The dongle basically contains 2 interfaces :
- USB -> Serial
- USB -> JTAG Parallel (two separate ports)
Here some characteristics of this interface:
- USB2.0 full-speed interface
- use of USB power
- Plug and Play
- IEEE 1149.1 standard
- 6Mbits/sec largest rate
- 150 times of parallel port JTAG
- Multi-ICE 10-pin socket
- Multi-ICE 10-pin socket
- target system 3.3V
- RS232 Standard
- 7 or 8-bit of data
- 2 or 1 bit of stop
- odd check/dual check / mark / space / no check
- 235kbps maximum baud rate
On-line debugging features:
- Support for multiple CPU series: ARM7, ARM9, Cortex-M3, XSCALE
- Eclipse integrated development environment installation and course (Linux / Windows version)
- On-line debugger OpenOCD installation and course (Linux / Windows version)
- Real-time debugging features: one-step, running at full speed, reset, hardware / software
- breakpoints, jump etc.
- CPU registers, memory, variable observation window (dynamic changes in real-time view)
- support ARM's built-in Cache and MMU function
- online programming variety of Nor Flash and Nand Flash
- Driver: support Linux2.4 or later, Windows ME/2000/2003/XP