Hi,
I/we have been trying to get DATA from an 18F4431 PIC SLAVE to an 18F4620 PIC MASTER using Oshonsoft SPI, but haven't succeeded.

Is there another way of sending DATA between PICs?

There could be a bug stopping the 18F4431 acting as SLAVE, so bare that in mind, if you have an answer.

Camerart.

 

UART, USART, I2C for starters.

 

UART, USART, I2C for starters.

Hi A,
For me I2C is out but UART, USART, are possibilities (Not sure of the difference, but I could use the suitable one.
Thanks,
C.

 

In brief with UART the clock signal is recovered from the data whereas the synchronous version includes a separate clock signal.

https://www.edn.com/electronics-blogs/embedded-basics/4440395/USART-vs-UART--Know-the-difference

 

In brief with UART the clock signal is recovered from the data whereas the synchronous version includes a separate clock signal.

https://www.edn.com/electronics-blogs/embedded-basics/4440395/USART-vs-UART--Know-the-difference

Hi A,
Thanks.
If I'm correct, I'll be using a UART.
As a kind of Chip select, could the MASTER change a PIN on the SLAVE to initialise sending the HSEROUT DATA?
C

 

You could use a separate pin to do that but UART is bidirectional so the 'master' could send a message which means 'send the data now'.

 

You could use a separate pin to do that but UART is bidirectional so the 'master' could send a message which means 'send the data now'.

Hi A,
Ok.
Previously I needed to add an extra UART to my 2xPIC PCB and had to add a switch between them. This is working ok.

This extra UART needs another switch with 3 or more inputs, and I have an FST3253 for this job, which I've been trying to avoid by using SPI, which is not working. The FST3253 needs 4xINPUTs instead of 1x, which is quite a task in changing the PCB around, and as I'm running out of PINs.

Do I have to bite the bullet and redesign?
C.

 

Hi,
I said the FST3253 needs 4xINPUTs, but of further reading, for what I need it only needs 2xPINs, which is easier.
C.