Posted on March 10, 2005 at 12:42Perhaps I am wrong, but I am not aware of a PC SPI protocol.
SPI stands for Serial Periferal Interface.
The communication takes place between a master and a slave.
Both of them use a shift register that is updated by means of three wires: MISO (master in - slave out), MOSI (master out - slave in) and SCK (serial clock).
The data transmission is byte-oriented, but there is no protocol that states the meaning of the exchanged data.
To talk to a PC, it is better to use a microcontroller with a SCI (Serial Communication Interface). In this case you have to use a MAX232 to make the signal compatible with RS232 (aka COM ports of a PC).
It is more difficult to interconnect a PC with SPI, since you have to build custom hardware and attach it to a parallel port.
Even if you have a communication mean with the PC, it is up to you to implement the In Application Programming.
I suggest you to read the datasheet of the microcontroller that you are using, the ''Flash Programming Reference Manual'', AN1576 and AN1576.
Regards
EtaPhi
