Post by thread:[PIC]: Serial Output with Hi Tec C

I am using an F877 to produce a 10 bit A/D reading. This is combined into a single variable. This is then passed to a binary to bcd routine which gives me a single variable xxxx (i.e. 1023, 0963, 0053, 0007). I now want to sent this to the terminal in the following format x.xxx (i.e. 1.023, 0.963, 0.053, 0.007). The serial comms is OK but I am not sure which is the best method method to produce this output. Any suggestions please? Ian Forse ------------------------------------------------------------------ http://mdm1.bravepages.com Technical support for the Multifunction Display Module --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.380 / Virus Database: 213 - Release Date: 24/07/02 -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email spam_OUTlistservTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

At 07:45 PM 8/3/02 +0100, you wrote: >I am using an F877 to produce a 10 bit A/D reading. This is combined into a >single variable. This is then passed to a binary to bcd routine which gives >me a single variable xxxx (i.e. 1023, 0963, 0053, 0007). I now want to sent >this to the terminal in the following format x.xxx (i.e. 1.023, 0.963, >0.053, 0.007). The serial comms is OK but I am not sure which is the best >method method to produce this output. > >Any suggestions please? So you have printf directed to the serial port? Best to avoid floating point numbers, they will probably add a lot of space to your program. How about this (untested) unsigned int x; // holds the ADC value from 0..1023 unsigned char y; // scratch variable for printing y = x/1000; // 0 <= x <= 65535 printf("%d.%3.3d", y, x-(y*1000)); Note that this compiler does not recognize the "0n" width specifier. Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" .....speffKILLspam@spam@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com 9/11 United we Stand -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listservKILLspammitvma.mit.edu with SET PICList DIGEST in the body

Doh! It just occurred to me that your 4 digit BCD number is probably "packed" into 16 bits (4 x 4 bit digits). In that case this should work: SendByte(((number >> 0) & 0x000f) + '0'); SendByte('0'); SendByte(((number >> 4) & 0x000f) + '0'); SendByte(((number >> 8) & 0x000f) + '0'); SendByte(((number >> 12) & 0x000f) + '0'); The shift right by 0 places for the first digit is obviously redundant, as is the AND by 0x000f for the 4th digit, but I like to keep things looking consistent so it's easier to see what it is intended. This should optimise quite nicely in Hi-Tech C, perhaps you can get away without some of the extra brackets too. -- Brent Brown, Electronic Design Solutions 16 English Street, Hamilton, New Zealand Ph/fax: +64 7 849 0069 Mobile/txt: 025 334 069 eMail: .....brent.brownKILLspam.....clear.net.nz -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email EraseMElistservspam_OUTTakeThisOuTmitvma.mit.edu with SET PICList DIGEST in the body

Yes it was packed 16bits. And 3 days ago I was almost there but did it the otherway round i.e. AND 0xf000, 0x0f00 etc followed by the shift. My error was && instead of & (Double Doh!!). It works perfectly now thanks. Ian ------------------------------------------------------ http://mdm1.bravepages.com Technical support for the Multifunction Display Module ------------------------------------------------------ > {Original Message removed}