| ??? 10/31/11 15:31 Modified: 10/31/11 15:36 Read: times |
#184485 - Soft SPI speed Responding to: ???'s previous message |
If the soft Slave_SPI accept/respond loop is written in hand optimized assembly, a speed about 100Kbps is achivable, even with a 12MHz (x1) AT89S52. For the BASCOM SPI slave interface, response must be slower, maybe up to 10Kbps. For experimenting if the OP adds a validation routine to data/responses between Master and Slave devices then a secure channel to exchange data can be implemented.
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| Topic | Author | Date |
| SPI Slave in 89S52 | 01/01/70 00:00 | |
| Get real processor | 01/01/70 00:00 | |
| Topic Author Date | 01/01/70 00:00 | |
| Big problem | 01/01/70 00:00 | |
| Look for a different model | 01/01/70 00:00 | |
| Try 8051 BASCOM | 01/01/70 00:00 | |
| at what speed | 01/01/70 00:00 | |
| Interpreters have an easier life. | 01/01/70 00:00 | |
| Soft SPI speed | 01/01/70 00:00 | |
| But how to combine that loop with a real program? | 01/01/70 00:00 | |
| and more | 01/01/70 00:00 | |
| Software master trivial - slave is not | 01/01/70 00:00 | |
| SPI analysis is made, results? | 01/01/70 00:00 | |
| There _may_ be a solution - but maybe not acceptable | 01/01/70 00:00 | |
| sure, and so what? | 01/01/70 00:00 | |
| SPI at 100Kbps | 01/01/70 00:00 | |
| Still gives puny transfer rate with significant limitations | 01/01/70 00:00 | |
| the answer is | 01/01/70 00:00 | |
| Fully Interlocked Handshaking. | 01/01/70 00:00 | |
Quite common | 01/01/70 00:00 |