Post by thread:[PIC]: 18F migration to dsPIC

Turns out I need to add another serial port, so the only parts that support two UARTS are the dsPICs (right?). So, is the migration path pretty easy to move code running on an 18F to a dsPIC, other than the setups etc. Anyone have some UART setup code for a dsPIC they are willing to share? I haven't really spent much time looking at this, and assume for two uarts they each have a high level interupt. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

>Turns out I need to add another serial port, so the only parts that >support two UARTS are the dsPICs (right?). So, is the migration path >pretty easy to move code running on an 18F to a dsPIC, other >than the setups etc. No you have two possibilities. 1. There are some 18F chips with two hardware UARTS, but they come in the 64 pin TQFP package IIRC. Check the 18F family selection charts on the Microchip website. 2. The C18 compiler has a software UART you could use for a second UART. At a pinch you could probably make the demo version of the compiler produce either a linkable module or a assembly language output if you do not want to use C.

At 08:02 AM 8/10/2005 -0700, you wrote: >Turns out I need to add another serial port, so the only parts that >support two UARTS are the dsPICs (right?). There are a number of 18F parts that have two UARTs. At least the PIC18F6520/8520/6620/8620/6720/8720. They come in nice 0.5mm pitch TQFP-80 or TQFP-64 packages, so you get lots of I/O to work with. >Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" spam_OUTspeffTakeThisOuTinterlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com ->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff

I've been working with the MAX3110/1 which gives an additional hardware UART over a serial bus. As a bonus, it has a RS232 transceiver. I started using these because my software uart routine always seemed a little sub-par. Here is an excerpt from the data sheet, perhaps you will find it helpful: The MAX3110E/MAX3111E combine a full-featured universal asynchronous receiver/transmitter (UART) with ±15kV ESD-protected RS-232 transceivers and integrated charge-pump capacitors into a single 28-pin package for use in space-, cost-, and power-constrained applications. The MAX3110E/MAX3111E also feature an SPI™/QSPI™/MICROWIRE™-compatible serial interface to save additional board space and microcontroller (µC) I/O pins. Cheers, Ian Alan B. Pearce wrote: {Quote hidden}>>Turns out I need to add another serial port, so the only parts that >>support two UARTS are the dsPICs (right?). So, is the migration path >>pretty easy to move code running on an 18F to a dsPIC, other >>than the setups etc. >> >> > >No you have two possibilities. > >1. There are some 18F chips with two hardware UARTS, but they come in the 64 >pin TQFP package IIRC. Check the 18F family selection charts on the >Microchip website. > >2. The C18 compiler has a software UART you could use for a second UART. At >a pinch you could probably make the demo version of the compiler produce >either a linkable module or a assembly language output if you do not want to >use C. > >

For a hobby project...Maxim is fine. For production......I never ever ever ever ever use Maxim unless there is NO other possible solution. I looked thru the selector guide for dual UART parts, so thats why I posted in hopes that I missed them in the 18F family...looks like I did...so thanks very much. Ian Lesnet <.....ianlesnetKILLspam@spam@gmail.com> wrote: I've been working with the MAX3110/1 which gives an additional hardware UART over a serial bus. As a bonus, it has a RS232 transceiver. I started using these because my software uart routine always seemed a little sub-par. Here is an excerpt from the data sheet, perhaps you will find it helpful: The MAX3110E/MAX3111E combine a full-featured universal asynchronous receiver/transmitter (UART) with ±15kV ESD-protected RS-232 transceivers and integrated charge-pump capacitors into a single 28-pin package for use in space-, cost-, and power-constrained applications. The MAX3110E/MAX3111E also feature an SPI™/QSPI™/MICROWIRE™-compatible serial interface to save additional board space and microcontroller (µC) I/O pins. Cheers, Ian Alan B. Pearce wrote: {Quote hidden}>>Turns out I need to add another serial port, so the only parts that >>support two UARTS are the dsPICs (right?). So, is the migration path >>pretty easy to move code running on an 18F to a dsPIC, other >>than the setups etc. >> >> > >No you have two possibilities. > >1. There are some 18F chips with two hardware UARTS, but they come in the 64 >pin TQFP package IIRC. Check the 18F family selection charts on the >Microchip website. > >2. The C18 compiler has a software UART you could use for a second UART. At >a pinch you could probably make the demo version of the compiler produce >either a linkable module or a assembly language output if you do not want to >use C. > >