| ??? 10/18/07 12:56 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#145883 - it can't! Responding to: ???'s previous message |
The VDIP data sheet ( http://www.vinculum.com/documents..._VDIP1.pdf ) talks about sending 11 bits via SPI to the VDIP data in (diagrams on page 9), but I don't understand how this could be done.
it can't! FTDI is treating the acronym 'SPI' VERY losely. The interface is NOT SPI as we know. You need to code a bit-banger with variable number of bits per transmission. I have made FTDI aware of their falsehood in using the name SPI, but I do not think it did any good. Re the Vinculum: the chip is GREAT, the documentation STINKS. I coded it using serial (Tx/Rx) and had to throw my code written based on the manual out and start 'building' the code step by step, analyzing the output from each and every step before processing it and going to the next step. Erik |
| Topic | Author | Date |
| Vinculum VDIP with hardware SPI | 01/01/70 00:00 | |
| it can't! | 01/01/70 00:00 | |
| Thanks Erik | 01/01/70 00:00 | |
| SPI on a VDIP | 01/01/70 00:00 | |
| Interesting... | 01/01/70 00:00 | |
| Assembly bit bang code for Viculum SPI | 01/01/70 00:00 | |
Thanks Bert | 01/01/70 00:00 |