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| Search found 18 matches |
| Author | Message |
|---|---|
 Topic: spi_xfer for more than 8 bits |
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| krugger Replies: 2 Views: 5368 |
 Forum: General CCS C Discussion Posted: Fri Nov 25, 2011 3:27 pm Subject: spi_xfer for more than 8 bits |
| Thanks PCM.
Changed the variables doce and trece for an int16 and works perfectly. Sorry for the silly question. 
Pablo |
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| Topic: spi_xfer for more than 8 bits |
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| krugger Replies: 2 Views: 5368 |
Forum: General CCS C Discussion Posted: Fri Nov 25, 2011 11:59 am Subject: spi_xfer for more than 8 bits |
| Hi everybody,
I'm working in a project in which I need to communicate a PIC 16F1827 with an VDIP2 module by FTDI. This module uses a -let's say funny- SPI that needs 13 bits to be transmitted pe ... |
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| Topic: Test code to test ds1305.c |
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| krugger Replies: 6 Views: 11790 |
Forum: General CCS C Discussion Posted: Thu Oct 06, 2011 6:11 pm Subject: Test code to test ds1305.c |
| Thank you PCM,
When you say SPI mode 1 or 3 you are referring to these definitions, arent't you? #define SPI_MODE_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H) #define SPI_MODE_1 (SPI_L_TO_H& ... |
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| Topic: Test code to test ds1305.c |
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| krugger Replies: 6 Views: 11790 |
Forum: General CCS C Discussion Posted: Thu Oct 06, 2011 5:34 pm Subject: Using 4 wire-SPI between PIC16F1827 and DS1305 |
| Hi,
I was wondering if it's possible to connect DS1305 RTC to PIC16F1827 using a 4 wire-SPI. The DS1305 datasheet it's says: "The serial peripheral interface (SPI) is a synchronous bus for ... |
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| Topic: How to deal with RTCC in apps with timing constraints? |
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| krugger Replies: 6 Views: 8197 |
Forum: General CCS C Discussion Posted: Sat Jul 23, 2011 7:51 pm Subject: How to deal with RTCC in apps with timing constraints? |
| Thank you Temtronic for your answers,
I'm using PIC16F1827, but I don't have problems with designing a clock, but with dealing with it together with my measures. I need 2.4 seconds of continuous ... |
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| Topic: How to deal with RTCC in apps with timing constraints? |
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| krugger Replies: 6 Views: 8197 |
Forum: General CCS C Discussion Posted: Fri Jul 22, 2011 8:45 pm Subject: How to deal with RTCC in apps with timing constraints? |
| Let's make an specific post for this doubt:
I'm programming an application that has to around 2 seconds of consecutive ADC measures each 10 minutes. I think I do understand (hopefully) how to cr ... |
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| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Fri Jul 22, 2011 9:20 am Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| An extra doubt:
In my country, the norm for harmonic distortion measuring in electrical network ask to takes measures each ten minutes during a complete week. I think I do understand (hopefully) ... |
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| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Thu Jul 21, 2011 2:32 pm Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| The point is I need to take measures at a frequency that allows me to make a FFT to see at least 40th harmonic of the 60 Hz electric signal.
If I'm not wrong this means: 60 Hz x 40 th Harmonic = ... |
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| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Wed Jul 20, 2011 6:03 pm Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| Thank you to all.
Your feedback is greatly appreciated by all the users in this forum. To sum up a bit: I understand that all timing measures from Proteus-VSM are not reliable. Related questi ... |
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| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Wed Jul 20, 2011 4:46 pm Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| Ok, using your configuration in my header file I obtain the following execution times for some of the used instructions:
set_tris(0xXX); ==> 250 ns spi_xfer_SRAM(0xXX); ==> 3.750 us act ... |
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| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Wed Jul 20, 2011 3:45 pm Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| Also for data storage, consider one of those modules that take serial data and store onto a flashdrive into a file. Cheap, easy to use, transportable, no drivers to code.....all the hard stuff is don ... | |
| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Wed Jul 20, 2011 3:40 pm Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| I simulate both codes on their respectives similar schematics (only the PIC component changing from one to the other). I do it step by step, and Proteus shows the elapsed time between the previous ins ... | |
| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Wed Jul 20, 2011 3:15 pm Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| Thank yoo both for your feedback. I've changed the frequency to 32 MHz on both, and still have differences in execution times.
Any other suggestion? Thank you again for sharing your knowledge! ... |
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| Topic: Differences in instruction times using PIC16F1827 and PIC18F |
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| krugger Replies: 16 Views: 33518 |
Forum: General CCS C Discussion Posted: Wed Jul 20, 2011 11:53 am Subject: Differences in instruction times using PIC16F1827 and PIC18F |
| Dear all,
I'm pretty sure this should be related with delay definitions, but I still can't find the error. Let me put you in context. I'm working in a project to measure, store and send data from 6 ... |
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| Topic: MCP3208 driver vs SPI Library functions |
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| krugger Replies: 25 Views: 65069 |
Forum: General CCS C Discussion Posted: Tue Jul 19, 2011 8:53 pm Subject: MCP3208 driver vs SPI Library functions |
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Thank you again! |
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