| ??? 12/28/08 10:24 Read: times |
#161183 - Insufficient information Responding to: ???'s previous message |
Michael Malloy said:
MOV SCON, #13h
only command in whole program that refers to SCON There is no way that people reading the forum can guess what may or may not happen in the rest of your program without seeing it - or at least a link to where it can be found. If you want a critique of the program, you really need to provide the whole program! I am sure that no data that comes in from the serial port actually makes it to external RAM that is what I wanted to confirm? Yes, the instructions that you've shown do not access external RAM - or any other RAM, for that matter. unless there is some other trick way of getting data into the external RAM knowing that the only one routine/command in the whole asm code that refers to SBUF iS the previously mentioned command Again, it is impossible to tell what "tricks" may or may not be used elsewhere in the program without actually seeing the whole program! MOV SBUF,SBUF
I assume if any data made it to external RAM then the code would have had to MOV the DPTR to some external ram location then move the SBUF data in Yes - using either MOVX @DPTR or MOVX @Rn |
| Topic | Author | Date |
| 8051/2 serial port as shift register | 01/01/70 00:00 | |
| Read the datasheet and look for Mode 0 | 01/01/70 00:00 | |
| The datasheet for YOUR MCU - or not? | 01/01/70 00:00 | |
| it doesn't always work in the same way | 01/01/70 00:00 | |
| True; hence... | 01/01/70 00:00 | |
| Loopback? | 01/01/70 00:00 | |
| serial port as shift register | 01/01/70 00:00 | |
| Insufficient information | 01/01/70 00:00 | |
| cute | 01/01/70 00:00 | |
Not enough Inofmation start from scratch | 01/01/70 00:00 |