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Logic contention(s) detected in Flex 20x4 driver

 
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*estudiante



Joined: 10 Aug 2015
Posts: 3

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Logic contention(s) detected in Flex 20x4 driver
PostPosted: Sun Sep 20, 2015 6:02 pm     Reply with quote
good everyone, I'm looking at the code example and the library
http://www.ccsinfo.com/forum/viewtopic.php?t=28268
than PCM but when I simulate in Proteus gives me error.

these are the errors

Logic contention(s) detected on net #00003.
Logic contention(s) detected on net #00001.
Logic contention(s) detected on net #00002.
Logic contention(s) detected on net #00004.

I connect the pins as it says in the library but it gives me error
Code:

#define LCD_DB4   PIN_D4
#define LCD_DB5   PIN_D5
#define LCD_DB6   PIN_D6
#define LCD_DB7   PIN_D7

#define LCD_RS    PIN_E0
#define LCD_RW    PIN_E1
#define LCD_E     PIN_E2

I hope you can help me, thanks
Ttelmah



Joined: 11 Mar 2010
Posts: 19540

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PostPosted: Mon Sep 21, 2015 12:23 am     Reply with quote
Simple answer - get rid of Proteus.....

Proteus cannot simulate the PIC at all well (a search here will find lots of posts about this).

Problem here is that the PIC pins are used by the driver as if they are tri-state. The driver reprograms the I/O direction, when the R/W line is used, so that the same pin used as an input can also be used as an output. Proteus cannot understand this, so complains.....
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