| ??? 02/16/05 07:49 Read: times |
#87618 - More Details? Responding to: ???'s previous message |
Doug Carssow said:
... receive data from it [the FPGA] that will be sent out of the serial port to the main computer. Is it just a matter of receiving a byte and then stuffing exactly that byte out of the serial port - ie, the 8051 does nothing more than a glorified UART? Or does the 8051 have to process the data between the parallel & serial ports? If processing is required, this may well be the limiting factor to the data rate; If no processing is required, what is the point in having an 8051 at all?! Even if processing is required, why can't the FPGA do it? As Christian has already said, the Serial port is most likely to be the bottleneck. Think about it: a parallel port receives all 8 bits at once; a serial port has to send a start bit, then each data bit in turn, then a stop bit - ie, 10 bit-times for each byte! |
| Topic | Author | Date |
| 8051 I/O port data rate | 01/01/70 00:00 | |
| Baud rate | 01/01/70 00:00 | |
| rate | 01/01/70 00:00 | |
| Again, what data rate? | 01/01/70 00:00 | |
| not sure | 01/01/70 00:00 | |
| Data rate critical | 01/01/70 00:00 | |
| I might have to wait a little while | 01/01/70 00:00 | |
| aerospace apps | 01/01/70 00:00 | |
| all componenets are rad hard | 01/01/70 00:00 | |
Radiation hardened 8052 | 01/01/70 00:00 | |
| Baud rate II. | 01/01/70 00:00 | |
| Yes, but | 01/01/70 00:00 | |
| Yes. | 01/01/70 00:00 | |
| port datarate | 01/01/70 00:00 | |
| good idea | 01/01/70 00:00 | |
| port speed | 01/01/70 00:00 | |
| EPP o USB ?? | 01/01/70 00:00 | |
| More Details? | 01/01/70 00:00 | |
| eeek | 01/01/70 00:00 | |
| Not guilty, m'lud | 01/01/70 00:00 |