| ??? 03/07/06 03:06 Read: times |
#111466 - Synchronously or asynchronously? Responding to: ???'s previous message |
Jeff said:
I will like to know how to make a subroutine for the 8051, to receive a byte, bit by bit on a port pin and put it into r3. Not RS232 communication. What I am looking for, if the port pin is seeing the 1's & 0's that make up a byte, to be able to bring this into the Micro and form the byte, then put this byte into r3. It's not enough to read a Port pin repeatedly and form a byte after 8 recieved bits. But it's mandatory to know when the bits will arrive!! In the case of RS232 transmission, normally the baud rate is known. So, if the UART recieves the first falling edge of a frame, then it "knows", when the bits will arrive and it will read the recieving bits at the right time. If no such baud rate is known, then you need some sort of synchronisation, means you need an additional signal line, which tells your micro, when each individual bit will arrive. As long as you don't tell us, whether you use a synchronous or asynchronous signal transmission, all your asking for code is meaningless! Kai |
| Topic | Author | Date |
| Bit by Bit | 01/01/70 00:00 | |
| how about the full story | 01/01/70 00:00 | |
| Re; | 01/01/70 00:00 | |
| Then convert it | 01/01/70 00:00 | |
| How to Convert it | 01/01/70 00:00 | |
| wotisit | 01/01/70 00:00 | |
| Standard Async? | 01/01/70 00:00 | |
| RS232? | 01/01/70 00:00 | |
| The answer is in the question | 01/01/70 00:00 | |
| Re: | 01/01/70 00:00 | |
| with what | 01/01/70 00:00 | |
| Re: | 01/01/70 00:00 | |
| not INNER working | 01/01/70 00:00 | |
| this REALLY smells | 01/01/70 00:00 | |
| good start | 01/01/70 00:00 | |
| reverse-engineering | 01/01/70 00:00 | |
| more likely a disassembly | 01/01/70 00:00 | |
| Illegal ? | 01/01/70 00:00 | |
| the disassembled chip most likely read c | 01/01/70 00:00 | |
| Insufficient! | 01/01/70 00:00 | |
| Wonderful, this is great | 01/01/70 00:00 | |
| Up one level | 01/01/70 00:00 | |
| already said? | 01/01/70 00:00 | |
| Synchronously or asynchronously? | 01/01/70 00:00 | |
| Re | 01/01/70 00:00 | |
| If it keeps you happy... | 01/01/70 00:00 | |
| of course it does | 01/01/70 00:00 | |
| I give up! | 01/01/70 00:00 | |
| Kai, how stupid we are | 01/01/70 00:00 | |
| I want an electrified keyboard | 01/01/70 00:00 | |
| Jez, don't you get it TO ALL NEWBIES | 01/01/70 00:00 | |
I'm touched! | 01/01/70 00:00 |