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8bit lcd with different i/o pins

 
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pankajhyd



Joined: 19 Aug 2010
Posts: 1

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8bit lcd with different i/o pins
PostPosted: Thu Aug 19, 2010 7:01 am     Reply with quote

hi frnds,

I have a hardware which has 8 different i/o's (not in order) connected to LCD with rs and enable pins also in different order. Does anybody have the driver with these conditions? Not able to change the following lines of code in flex_lcd code. Please help me to solve the probs.

void lcd_send_nibble(int8 nibble)
{
// Note: !! converts an integer expression
// to a boolean (1 or 0).
output_bit(LCD_DB4, !!(nibble & 1));
output_bit(LCD_DB5, !!(nibble & 2));
output_bit(LCD_DB6, !!(nibble & 4));
output_bit(LCD_DB7, !!(nibble & 8));


delay_cycles(1);
output_high(LCD_E);
delay_us(2);
output_low(LCD_E);
}
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hi
PCM programmer



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Posts: 21708

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PostPosted: Thu Aug 19, 2010 11:16 am     Reply with quote

Quote:

I have a hardware which has 8 different i/o's (not in order) connected to LCD with rs and enable pins also in different order.


The Flex LCD driver uses a 4-bit data interface for the LCD (plus 2 to 3
control lines). This is the most common method of connecting an LCD
to a microcontroller. You can set the PIC pins that are used for the LCD
by changing the #define statements at the start of the Flex driver.
The instructions for this are given in the following post:
http://www.ccsinfo.com/forum/viewtopic.php?t=24661

The Flex driver doesn't use an 8-bit data interface. Please use the
driver in the 4-bit mode. That's what it is designed for.
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