| ??? 09/27/11 15:58 Read: times |
#183915 - Yes Responding to: ???'s previous message |
I - kind of - did discuss in the same direction.
Since the actual debugging functionality is hidden inside the processors in more-or-less complex debug cells, there isn't much hardware needs on the outside. What we need is some form of (preferably serial) link with enough bandwidth to dump register and memory contents as we single-step a target. Some (most) of the processors have so simple electrical interfaces to access the debug cells that it is possible to glue a small extra microcontroller to a dev-board, that might translate betweeen the debug port and standard USB. It may be possible to use a SPI interface to connect to the JTAG pins. Or if the SPI port isn't flexible enough, most people will still not run JTAG at higher speeds than what is possible to bit-bang. Looking at the PCB of a Keil ULINK2, it's quite obvious that there is very little hardware there that would increase the cost of a dev-board: http://www.keil.com/support/m...ectors.htm |
| Topic | Author | Date |
| ARM Again | 01/01/70 00:00 | |
| Long life | 01/01/70 00:00 | |
| Really? | 01/01/70 00:00 | |
| It's always moving! | 01/01/70 00:00 | |
| Compiler long life is not import | 01/01/70 00:00 | |
| Tuppence worth | 01/01/70 00:00 | |
| I have worked with, and liked, | 01/01/70 00:00 | |
| s/IAR/ARM/ | 01/01/70 00:00 | |
| NXP generally have very nice chips+manuals | 01/01/70 00:00 | |
| thanx | 01/01/70 00:00 | |
| J-Link | 01/01/70 00:00 | |
| JTAG is just electrical if. Magic is in the debug cells | 01/01/70 00:00 | |
| "Debug Probe" | 01/01/70 00:00 | |
| Yes | 01/01/70 00:00 | |
| On-board debug probes | 01/01/70 00:00 | |
| That is what the ST Rep said | 01/01/70 00:00 | |
| 300 USD Keil JTAG was better than the 25USD ST one | 01/01/70 00:00 | |
| Same with most Keil ULINK versions. | 01/01/70 00:00 | |
woukln't kniow - but | 01/01/70 00:00 |