mangavalk/lcdproc
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Minor bugfixes to HD44780 backlight and keypad stuff.

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This commit is contained in:
robijn
2001-11-01 16:40:57 +00:00
parent 46174150ce
commit b821127fa7
4 changed files with 11 additions and 10 deletions
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server/drivers/hd44780-winamp.c
+7 -6
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@@ -127,13 +127,15 @@ lcdwinamp_HD44780_senddata (unsigned char displayID, unsigned char flags, unsign
else
portControl = 0;
portControl |= backlight_bit;
if (displayID == 0)
enableLines = EnMask[0] | EnMask[1] | ((extIF) ? EnMask[2] : 0);
else
enableLines = EnMask[displayID - 1];
// 40 nS setup time for RS valid to EN high, so set RS
port_out (lptPort + 2, (portControl|backlight_bit) ^ OUTMASK);
port_out (lptPort + 2, portControl ^ OUTMASK);
// Output the actual data
port_out (lptPort, ch);
@@ -141,7 +143,7 @@ lcdwinamp_HD44780_senddata (unsigned char displayID, unsigned char flags, unsign
if( delayBus ) hd44780_functions->uPause (1);
// then set EN high
port_out (lptPort + 2, (enableLines|portControl|backlight_bit) ^ OUTMASK);
port_out (lptPort + 2, (enableLines|portControl) ^ OUTMASK);
if( delayBus ) hd44780_functions->uPause (1);
@@ -152,7 +154,7 @@ lcdwinamp_HD44780_senddata (unsigned char displayID, unsigned char flags, unsign
// ABOVE TEXT ignored now, using delays if delayBus is specified
// Set EN low and we're done...
port_out (lptPort + 2, (portControl|backlight_bit) ^ OUTMASK);
port_out (lptPort + 2, portControl ^ OUTMASK);
// 10 nS data hold time provided by the length of ISA write for EN
}
@@ -168,10 +170,9 @@ unsigned char lcdwinamp_HD44780_readkeypad (unsigned int YData)
{
unsigned char readval;
// 10 bits output
// 8 bits output
// Convert the positive logic to the negative logic on the LPT port
port_out (lptPort, ~YData & 0x00FF );
port_out (lptPort + 2, ( ((~YData & 0x0100) >> 7) | ((~YData & 0x0200) >> 7 )) ^ OUTMASK);
if( delayBus ) hd44780_functions->uPause (1);
@@ -179,7 +180,7 @@ unsigned char lcdwinamp_HD44780_readkeypad (unsigned int YData)
readval = ~ port_in (lptPort + 1) ^ INMASK;
// Set output back to idle state for backlight
port_out (lptPort + 2, backlight_bit ^ INMASK );
port_out (lptPort + 2, backlight_bit ^ OUTMASK );
// And convert value back.
return ( (readval >> 4 & 0x03) | (readval >> 5 & 0x04) | (readval >> 3 & 0x08) | (readval << 1 & 0x10) ) & ~stuckinputs;