Post by thread:[EE]:How to link PIC-to-PC using USB?

Hi all. I need to communicate to my pic from my PC. Currently I do it via PC-SerialPort to 16C73-UART, but since almost all new PCs use USB, I would like to develop something that goes from PC-USB to my PIC. Any Ideas or leads? Anyone familiar with the USB specification? Any advice/ideas appreciated. Hal _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

>Any Ideas or leads? Anyone familiar with the USB specification? usb is nowhere near as friendly as RS232/485/whatever. The PIC end may not be too bad if you use the new USB enabled pics - the source code I have looked at seemed pretty reasonable, but unless microchip produce some nice PC side source code you will probably find that end of things a hard slog. Simon -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

The easy way is the FTDI chips. They are at http://www.ftdi.co.uk Andy Hal Johnson <spam_OUThaljohnson9000TakeThisOuTHOTMAIL.COM> on 12/15/2000 02:15:51 AM Please respond to pic microcontroller discussion list <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> To: PICLISTKILLspamMITVMA.MIT.EDU cc: (bcc: Andrew Kunz/TDI_NOTES) Subject: [EE]:How to link PIC-to-PC using USB? Hi all. I need to communicate to my pic from my PC. Currently I do it via PC-SerialPort to 16C73-UART, but since almost all new PCs use USB, I would like to develop something that goes from PC-USB to my PIC. Any Ideas or leads? Anyone familiar with the USB specification? Any advice/ideas appreciated. Hal _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> I need to communicate to my pic from my PC. Currently I do it via > PC-SerialPort to 16C73-UART, but since almost all new PCs use USB, I would > like to develop something that goes from PC-USB to my PIC. USB is *much* more heavyweight than RS-232. Microchip has two PICs with USB capability built in, and also has a stand alone USB chip. However, there is still considerable software on both ends to implement a USB connection. USB can be appropriate for a consumer product, because it is very easy to use for the end user. The volumes are then often high enough so that the considerable extra development effort can be justified. If you're doing a one-off or private project, I would recommend sticking to RS-232 unless there are techinical reasons not to. ***************************************************************** Olin Lathrop, embedded systems consultant in Devens Massachusetts (978) 772-3129, .....olinKILLspam.....embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> I need to communicate to my pic from my PC. Currently I do it via > PC-SerialPort to 16C73-UART, but since almost all new PCs > use USB, I would > like to develop something that goes from PC-USB to my PIC. I don't know all of your criteria, but if you would like to avoid the trouble of USB development, the USBSIMM might be worth looking into. -Robert Severson http://usbsimm.home.att.net http://www.jged.com http://www.annatechnology.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

> Hi all. > I need to communicate to my pic from my PC. Currently I do it via > PC-SerialPort to 16C73-UART, but since almost all new PCs use USB, I would > like to develop something that goes from PC-USB to my PIC. > > Any Ideas or leads? Anyone familiar with the USB specification? > > Any advice/ideas appreciated. Use a USB to RS232 Adaptor Cable 8-) Although USB to Printer Port are a third of the price in the UK. Chris -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.

Philips and Dallas Semi make USB chips with standard serial\parallel interfaces. You have to deal with some USB stuff but it's not that hard. If you want more flexibility than simply a comm port (you could implement the comm port Device Class (but you don't have to). The dallas chip is USB->1 wire, I haven't looked at it much and I believe it is still in pre-production. Philips have the PDIUSBD11 which is a USB I\F with I2C serial. It has some good features such as supporting full speed USB (there are various features which can only be implemented in full speed devices). The I2C interface is 1MHz, which IIRC gave about 500KByte\s actual data throughput. There is also a version of the Philips USB chip with a parallel (DMA compliant) interface. The parallel I\F version is only available in SMD packages (SOIC and SSOP I believe) while the serial I\F is available in DIP. They also have a USB 2.0 parallel I\F chip in development. Tom. {Original Message removed}

> I need to communicate to my pic from my PC. Currently I do it via > PC-SerialPort to 16C73-UART, but since almost all new PCs use USB, I would > like to develop something that goes from PC-USB to my PIC. I would look seriously at one of the USB-RS232 converters that are available if there is no RS232 port on your PC. It is just so much easier to handle RS232 at the PIC. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads