| ??? 01/08/05 12:50 Read: times |
#84569 - ibid Responding to: ???'s previous message |
Darek Rogowski said:
I think about remote exchange of code.
I planed to remotely (USB, RS-485, RS-232) set this apliance in setup connection. I think the Cypress EZ-USB does exactly this? Then I want to setup apliance in read mode and send to this new code directly do EEPROM memory. But, again, why use serial EEPROM when you need a parallel memory interface anyway for your SRAM?! After that a want to send special reset command (maybe any hardware haha "fish eat itself") Use a watchdog! It is posible in family 80C51? See: http://www.8052.com/forum/read.phtml?id=84567 For details of the 8051 external memory interface, and the signals involved in CODE reads and XDATA read/write, see Chapter 3 of the "bible" - 80C51 Family Hardware Description: http://www.semiconductors.philips.com/acrobat/v...WARE_1.pdf (start at p6). |
| Topic | Author | Date |
| Use SRAM as code memory. | 01/01/70 00:00 | |
| Yes, but | 01/01/70 00:00 | |
| thanks for answer | 01/01/70 00:00 | |
| ibid | 01/01/70 00:00 | |
| There are so many options... | 01/01/70 00:00 | |
| Answer partially wrong: Can't Write CODE | 01/01/70 00:00 | |
| No need for switching | 01/01/70 00:00 | |
| Oh yes... | 01/01/70 00:00 | |
| Take care - wherewer your code is :-) | 01/01/70 00:00 | |
| Once again thanks | 01/01/70 00:00 | |
| Self-modifying code | 01/01/70 00:00 | |
| Self-modifying code - good or bad | 01/01/70 00:00 | |
| Self-modifying code | 01/01/70 00:00 | |
| 90:10 rule | 01/01/70 00:00 | |
| In System Programming Application Note | 01/01/70 00:00 | |
| In-System v. In-Application Programming | 01/01/70 00:00 | |
| IAP v ISP | 01/01/70 00:00 | |
| Philips IAP | 01/01/70 00:00 | |
It's easier with Atmel | 01/01/70 00:00 |