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| Search found 12 matches |
| Author | Message |
|---|---|
 Topic: Parallel Printer interfacing !! |
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| th3gr8 Replies: 16 Views: 26987 |
 Forum: General CCS C Discussion Posted: Fri Jan 09, 2015 9:29 am Subject: Parallel Printer interfacing !! |
| re: crystal value
That PIC needs a real crystal (and 2 caps) to use as it's 'master clock'. Common values used are 4, 16 and 20 MHz. For fast serial ports like 115k200 you need a 20MHz crystal, slow ... |
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| Topic: Parallel Printer interfacing !! |
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| th3gr8 Replies: 16 Views: 26987 |
Forum: General CCS C Discussion Posted: Fri Jan 09, 2015 6:17 am Subject: Parallel Printer interfacing !! |
| The actual crystal value is not very critical for the centronics (parallel) interface because it uses the strobe/busy handshake to move data so the crystal frequency is not very critical there (other ... | |
| Topic: Parallel Printer interfacing !! |
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| th3gr8 Replies: 16 Views: 26987 |
Forum: General CCS C Discussion Posted: Thu Jan 08, 2015 7:23 am Subject: Parallel Printer interfacing !! |
| For short connections you don't need anything on the data lines. What you do need is a resistor to pull the 'busy' line to the 'busy' state, if the connection is not present. This way the code won't t ... | |
| Topic: Parallel Printer interfacing !! |
|
| th3gr8 Replies: 16 Views: 26987 |
Forum: General CCS C Discussion Posted: Thu Jan 08, 2015 3:43 am Subject: Parallel Printer interfacing !! |
| Ok.. That helps ..
so now, i want use 10 i/o pins of my PIC and follow the sequence.. do i need to put a resistor on the Data lines (D0-D7) or should i connect it directly? Sorry for asking such sil ... |
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| Topic: Parallel Printer interfacing !! |
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| th3gr8 Replies: 16 Views: 26987 |
Forum: General CCS C Discussion Posted: Thu Jan 08, 2015 1:33 am Subject: Parallel Printer interfacing !! |
| Ok .. but i read somewhere that Centronics interface was used on Old printers etc .. And if i connected the printer with PIC, how much XTAL value would i need? can i work with 4Mhz?? is crystal value ... | |
| Topic: Parallel Printer interfacing !! |
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| th3gr8 Replies: 16 Views: 26987 |
Forum: General CCS C Discussion Posted: Wed Jan 07, 2015 9:43 pm Subject: Parallel Printer interfacing !! |
| and if i use a Thermal Printer (with Parallel Port), will the sequence of writing the data be same? | |
| Topic: Parallel Printer interfacing !! |
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| th3gr8 Replies: 16 Views: 26987 |
Forum: General CCS C Discussion Posted: Wed Jan 07, 2015 8:10 am Subject: Parallel Printer interfacing !! |
| Hello All ..
I want to interface a parallel printer with my PIC16F877A (serial printers are not available) .. I googled and found out that i need to connect D0-D7 with any output port of the PIC and ... |
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| Topic: i2c bus scanner program |
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| th3gr8 Replies: 9 Views: 119677 |
Forum: Code Library Posted: Wed Jul 02, 2014 3:04 pm Subject: Gr8 .. |
| Wow.. Really a nice program .. Thanks PCM Programmer .. | |
| Topic: Serial Interfacing problem |
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| th3gr8 Replies: 3 Views: 6554 |
Forum: General CCS C Discussion Posted: Mon Oct 14, 2013 1:10 am Subject: Woah !! |
| Thanx jeremiah ..
I forgot that ASCII table :D .. Is there any way so that i get my desired value without subtracting "48" ??? |
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| Topic: Serial Interfacing problem |
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| th3gr8 Replies: 3 Views: 6554 |
Forum: General CCS C Discussion Posted: Sun Oct 13, 2013 10:00 pm Subject: Serial Interfacing problem |
| Hello All ..
I wrote a simple program which takes value of "r" from user via serial port and calculates Area (pi*r*r). Program is fine but it has an issue that whenever I take input from us ... |
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| Topic: Help regarding ADC |
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| th3gr8 Replies: 2 Views: 6053 |
Forum: General CCS C Discussion Posted: Tue Jul 16, 2013 6:12 am Subject: Sweet !! |
| Thanks alot Ttelmah.
As you mentioned, i was making mistakes at two places: 1) The screen was not getting cleared, due to which the text was getting over-written. 2) The format specifier i used (%d ... |
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| Topic: Help regarding ADC |
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| th3gr8 Replies: 2 Views: 6053 |
Forum: General CCS C Discussion Posted: Tue Jul 16, 2013 5:37 am Subject: Help regarding ADC |
| Hello
I am new to PIC programming and i am using CCS compiler. I am now working with PIC's built-in ADCs. I am using PIC 16F877A and i am little confused about somethings. I read that read_adc() f ... |
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