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Corelis’ innovative JTAG in-circuit emulators provide a real-time, non-intrusive development and debug environment for PowerPC 4XX processors using their enhanced industry-standard IEEE-1149.1 (JTAG) boundary-scan test port. This interface allows for a simple, yet robust, interface to the target processor.
The processors’ on-chip boundary-scan logic allows complete,
non-intrusive CPU resource access through the JTAG port, even when the
processor ‘hangs’ or otherwise runs out of control. The emulator/debugger
communicates with the target exclusive of serial ports or other peripheral
resources, and no ROM-based debugger or loader program is required. The portable USB-1149.1/E USB 2.0 controller, shown in Figure 1, plugs into a USB port on the computer and provides full debugging capability without any further hardware installation on the host PC. This controller is extremely useful in labs or other space-limited environments where workstations are frequently swapped. It is also useful in the field of troubleshooting and/or updating software, as it is ready to go by simply installing the software and plugging it in. The PCI-1149.1/Turbo™ controller, shown in Figure 2, provides the fastest operation in a relatively permanent installation. The PCI-1149.1/Turbo, a single-slot high-performance JTAG controller, is fully compliant with Revision 2.1 of the PCI Bus Specification. Easily configured and installed in a single PCI slot, the PCI-1149.1/Turbo connects to the target processor through a high-speed 16-pin JTAG pod.
Figure 2 - PCI-1149.1/Turbo JTAG Controller The portable PCMCIA-1149.1/E controller, shown in Figure 3, facilitates software development and debugging from any computer that supports the Personal Computer Memory Card Industry Association (PCMCIA) peripheral interface. The PCMCIA-1149.1/E - based emulators are useful in labs where space is limited, and in the field for troubleshooting and/or updating software.
Figure 3 - PCMCIA-1149.1/E JTAG Controller The portable PIO-1149.1/E controller, shown in Figure 4, plugs into the computer’s parallel port and provides full debugging capability without any further hardware installation on the host PC. This controller is extremely useful in labs or other space-limited environments where workstations are frequently swapped. It is also useful in the field of troubleshooting and/or updating software, as it is ready to go by simply installing the software and plugging it in.
Figure 4 - PIO-1149.1/E JTAG Controller The NetUSB-1149.1 controller, shown in Figure 5, is a stand-alone box which is connected either to a 10/100Base-T Ethernet LAN or USB port and is hooked up to the target board. This allows any Windows-based PC on the LAN to debug the target or to alternately debug directly through the USB port on the computer.
Figure 5 - NetUSB-1149.1 JTAG Controller Due to the unique nature of the emulator, the same hardware board can be used for any of the PowerPC family of processors that have IEEE-1149.1 compatibility. Thus, a developer using a PowerPC family processor can migrate to other PowerPC chips as they are introduced and retain the investment in hardware tools by merely installing another version of the emulator software.
Debugger Corelis JTAG emulators include the powerful CodeRunner™ source-level debugger with multiple-window support, allowing the developer to view source code, assembly code, variables (both local and global), memory, and register locations at the same time. It also supports the concurrent debugging of targets with multiple ICs and/or CPUs, providing the capability to display windows for each IC/CPU on the screen simultaneously. CodeRunner provides full source-correlated debugging, allowing the user to display the source for a particular line of assembly code and vice versa. CodeRunner has a modern “XP look and feel”, and features a very straightforward and user-friendly interface. Anyone familiar with the usage of source-level debuggers will master CodeRunner’s powerful features quickly without much of a learning curve. CodeRunner works with all popular C/C++ cross-compilers that generate ELF/DWARF 1 and ELF/DWARF 2 debug information. The user has the option to automatically load all debug symbols along with the executable, and these symbols will be displayed alongside of each line of assembly code. The debugger has the ability to
adjust debug source file pathnames, facilitating the ability to use the host
PC to debug executables that were compiled in Linux.
Variables The debugger can display four types of variables:
Memory locations can be displayed in hex or decimal at any address. All variables are displayed with their type (char, int, unsigned long, etc), and all arrays and structures can be broken down into individual elements. Macros CodeRunner provides an extensive macro and custom button capability. Macros are a sequence of commands (start processor, halt processor, write memory, set breakpoint, etc.) that can be formed into a single user-defined command. Macros can then be attached to Custom Toolbar buttons, allowing the user to create custom one-click buttons for the sequence of actions he uses most. The PCI-1149.1/Turbo™ boundary-scan controller card is the key element of the ScanExpress system. The PCI-1149.1/Turbo contains several performance enhancing functional sections aimed at increasing test vector and in-system programming throughput. The combination of these functional elements results in a very high data-scanning rate, which is completely decoupled from the PCI bus and the host computer. Command Files One of CodeRunner’s most powerful features is its ability to execute Command Files, which are written by the user in a structured “C”-like language. The “commands” used by command files consist of CodeRunner-related functions, such as reading/writing memory, starting the processor, halting the processor, reading/writing registers, etc.
Items Included with this Product
Corelis offers two different methods for programming flash devices connected to a Xilinx Virtex-II Pro FPGA PowerPC 405 core In-system Flash Programmers are divided into two categories. The first is the Target Assisted Flash Programmer that utilizes the Xilinx Virtex-II Pro FPGA PowerPC 405 core to aid in programming. The second is the ScanPlus Flash Programmer that utilizes only the IEEE-1149.1 JTAG instructions of the Virtex-II Pro, and no PowerPC 405 processor resources. Corelis stands unique in the industry by providing both solutions. The differences between these two approaches are outlined below. The unique aspect of the Target Assisted Flash Programmer is that it utilizes the JTAG based emulation features of the embedded PowerPC 405 processor and a small amount of target memory. The program data image is first downloaded into target RAM together with a small programming stub. The PowerPC 405 is then transitioned from Debug mode into Normal mode and programs the Flash memory in real time. With the Target Assisted Flash Programmer, you can program your on-board FLASH memory by simply identifying your FLASH device and its location in the system memory map. Using these target resources, the Target Assisted Flash Programmer operates very quickly and contains a wealth of additional features, like running script files, dumping data to log files, data-to-file comparison routines and many more. The underlying assumption when using the Target Assisted Flash Programmer is that the target board is fully functional and that the CPU can access target RAM. (Initialization scripts can be optionally used, if required, to configure the target processor board to provide the necessary RAM.) The ScanPlus JTAG Flash Programmer operates at the board-level rather then the device level. It accepts as inputs the board net list and the BSDL files for the boundary-scan devices on the printed circuit board assembly. The ScanPlus Flash Programmer will then program board FLASH memories, CPLDs, and configuration EPROMS, using only JTAG commands. With the ScanPlus Flash Programmer, you can still perform in-system programming even if the CPU fails to boot due to assembly defects, configuration errors, or erroneous designs. Being able to program and configure not functional board assemblies will help identifying the problematic areas that are preventing the proper operation of the design. The ScanPlus Flash Programmer is usually the proper choice for board bring-up and production environments. The underlying assumption when using the ScanPlus Flash Programmer is that you have access to the board netlist and BSDL files. Both the Target Assisted and ScanPlus Flash Programmers can be used with the same Corelis hardware (JTAG controller). By offering both programming solutions, you can always be sure to have access to the right tool for your in-system programming needs. In addition, Corelis provides a complete line of tools for boundary-scan test using the same JTAG controllers that are used for JTAG emulation and programming. For more detailed information about the Target Assisted and ScanPlus Flash In-System programmers, please read the data sheets below.
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