| ??? 09/06/05 20:45 Read: times |
#100721 - Several reasons... Responding to: ???'s previous message |
Erik Malund said:
We've been using the Xilinx 'Parallel Cable IV' to program the CPLD during assembly, and it works fine. But once the unit is closed up, it is extremely difficult to open back up to access the programming connector. We need to be able to make field revisions to the CPLD via the serial port on the uP.
not seeing the forest for the trees or what? why not just make the "programming connector" accessible without opening the box? Erik This is a very compact waterproof military product, and there was no room for an additional 4-pin connector on the outside. It wasn't expected that the CPLD code would ever need to change, and it wouldn't have if protocol in associated equipment from another vendor hadn't been changed slightly. We didn't even use a connector inside - just holes in the PCB for what was expected to be a one-time use. |
| Topic | Author | Date |
| Using 8051 to program CPLD via JTAG | 01/01/70 00:00 | |
| Eh??? | 01/01/70 00:00 | |
| Reply | 01/01/70 00:00 | |
| Don't hurt yourself | 01/01/70 00:00 | |
| Ouch! | 01/01/70 00:00 | |
| Regarding XAPP058 | 01/01/70 00:00 | |
| ????????????????? | 01/01/70 00:00 | |
| It's a interpreter of XSVF | 01/01/70 00:00 | |
| why JTAG? | 01/01/70 00:00 | |
| Yes, but... | 01/01/70 00:00 | |
| not seeing the forest for the trees or w | 01/01/70 00:00 | |
| Several reasons... | 01/01/70 00:00 | |
| CPLD programming | 01/01/70 00:00 | |
| programming Xilinx CPLDs | 01/01/70 00:00 | |
| XSVF Executor! | 01/01/70 00:00 | |
| XSVF Executor | 01/01/70 00:00 | |
| XSVF Executor | 01/01/70 00:00 | |
| Using 8051 to program CPLD via JTAG | 01/01/70 00:00 | |
Yeah well | 01/01/70 00:00 |