Need suggestions for reading/writing data serially with a clock line - Electronic Circuits Projects Diagrams Free

toodles · 23rd April 2007, 09:42 AM

My specific project is to use a microcontroller to emulate a controller on multiple game consoles. A number of them use serial communication with a clock line; NES, SNES, 3DO, Playstation 1 and Playstation 2 are the easiest examples. The frequency of the clock signal varies greatly, but the fastest seems to be the PS2 at 500KHz.

I am looking at using a 18LF4550 as my target microcontroller, but can be swayed to look at others if there is a strong reason to.

My main concern is whether or not there is technology built into the PIC to make this kind of serial communication easier/faster. I could certainly program it to wait for the needed rise or fall on the clock line, and shift each bit I need individually, but this feels very inelegant. Are there any functions for shifting data in time with an external clock signal that I can look into?

**Nigel Goodwin** · 23rd April 2007, 09:44 AM

The PIC has various hardware interfaces built-in, including a fully functional USART and SPI, which may do what you want?.

Pommie · 23rd April 2007, 09:49 AM

The 4550 has USB, MSSP and EUSART. Check the data sheet. I would imagine that the Master Synchronous Serial Port would be the most useful.

Mike.

toodles · 23rd April 2007, 10:12 AM

Looking like the SPI of the MSSP is was I was looking for. Thanks, I'll dig into it.

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23rd April 2007, 09:42 AM	#1
toodles	Need suggestions for reading/writing data serially with a clock line My specific project is to use a microcontroller to emulate a controller on multiple game consoles. A number of them use serial communication with a clock line; NES, SNES, 3DO, Playstation 1 and Playstation 2 are the easiest examples. The frequency of the clock signal varies greatly, but the fastest seems to be the PS2 at 500KHz. I am looking at using a 18LF4550 as my target microcontroller, but can be swayed to look at others if there is a strong reason to. My main concern is whether or not there is technology built into the PIC to make this kind of serial communication easier/faster. I could certainly program it to wait for the needed rise or fall on the clock line, and shift each bit I need individually, but this feels very inelegant. Are there any functions for shifting data in time with an external clock signal that I can look into?

23rd April 2007, 09:44 AM	#2
Nigel Goodwin	The PIC has various hardware interfaces built-in, including a fully functional USART and SPI, which may do what you want?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

23rd April 2007, 09:49 AM	#3
Pommie	The 4550 has USB, MSSP and EUSART. Check the data sheet. I would imagine that the Master Synchronous Serial Port would be the most useful. Mike.

23rd April 2007, 10:12 AM	#4
toodles	Looking like the SPI of the MSSP is was I was looking for. Thanks, I'll dig into it.