| ??? 06/19/06 23:26 Read: times |
#118557 - Ready to XRAM My Head Against the Wall! |
Atmel AT89C51RD2 w/ 64k internal flash and 1792 bytes internal XRAM at my disposal.
Problem: despite all attempts, apparently I can't properly write/read to the XRAM inside the device. My simple test code reads a data table (byte at a time)from ROM, writes each byte to XRAM, and sends to serial port (so I can see what happens). It reads back the same bytes from XRAM for verification. All known registers (AUXR = 10h and hardware byte HSB = BBh) are set verified. Set with XRAM enabled, no external devices, XRAM access set to max 1792 bytes. All I can read back is garbage! I'd REALLY appreciate your help Thanks :) |
| Topic | Author | Date |
| Ready to XRAM My Head Against the Wall! | 01/01/70 00:00 | |
| Show us the code! | 01/01/70 00:00 | |
| Post Your Code | 01/01/70 00:00 | |
| Code Posted | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| That's different on the Atmel | 01/01/70 00:00 | |
| After reading the datasheet.. | 01/01/70 00:00 | |
| Already Did All of That... | 01/01/70 00:00 | |
| What your code is doing... | 01/01/70 00:00 | |
| I'll Try That | 01/01/70 00:00 | |
| Thats the magic of 8051! | 01/01/70 00:00 | |
| But wait! There's more! | 01/01/70 00:00 | |
| an obvious miss | 01/01/70 00:00 | |
Problem Solved | 01/01/70 00:00 |