mangavalk/lcdproc
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Added Stephen Davies output register extension code.

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This commit is contained in:
robijn
2002-06-03 21:34:24 +00:00
parent f13e87b912
commit 77e6977196
7 changed files with 83 additions and 13 deletions
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server/drivers/hd44780-winamp.c
+23 -8
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@@ -32,6 +32,11 @@
* Backlight
* SEL (17) backlight (optional, see documentation)
*
* Additional output latch strobe
* Not part of the hd44780 itself - addl '373/4, '574 chip or similar
* (optional, see documentation (eventually))
* nLF (14) LE
*
* Keypad connection (optional):
* Some diodes and resistors are needed, see further documentation.
* printer port keypad
@@ -41,11 +46,8 @@
* D3 (5) Y3
* D4 (6) Y4
* D5 (7) Y5
* D6 (7) Y6
* D7 (7) Y7
* nLF (14) Y8
* INIT (16) Y9
* nSEL (17) Y10
* D6 (8) Y6
* D7 (9) Y7
* nACK (10) X0
* BUSY (11) X1
* PAPEREND (12) X2
@@ -76,6 +78,7 @@
void lcdwinamp_HD44780_senddata (PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch);
void lcdwinamp_HD44780_backlight (PrivateData *p, unsigned char state);
unsigned char lcdwinamp_HD44780_readkeypad (PrivateData *p, unsigned int YData);
void lcdwinamp_HD44780_output(PrivateData *p, int data);
#define EN1 STRB
#define EN2 SEL
@@ -83,6 +86,7 @@ unsigned char lcdwinamp_HD44780_readkeypad (PrivateData *p, unsigned int YData);
#define RW LF
#define RS INIT
#define BL SEL
#define LE LF
static const unsigned char EnMask[] = { EN1, EN2, EN3 };
@@ -117,6 +121,9 @@ hd_init_winamp (Driver *drvthis)
p->stuckinputs = lcdwinamp_HD44780_readkeypad (p, 0);
}
// Write new value to output port latches
hd44780_functions->output = lcdwinamp_HD44780_output;
return 0;
}
@@ -183,9 +190,6 @@ unsigned char lcdwinamp_HD44780_readkeypad (PrivateData *p, unsigned int YData)
// Read inputs
readval = ~ port_in (p->port + 1) ^ INMASK;
// Set output back to idle state for backlight
port_out (p->port + 2, p->backlight_bit ^ OUTMASK );
// And convert value back (MSB first).
return (((readval & FAULT) / FAULT <<4) | /* pin 15 */
((readval & SELIN) / SELIN <<3) | /* pin 13 */
@@ -193,3 +197,14 @@ unsigned char lcdwinamp_HD44780_readkeypad (PrivateData *p, unsigned int YData)
((readval & BUSY) / BUSY <<1) | /* pin 11 */
((readval & ACK) / ACK )) & ~p->stuckinputs; /* pin 10 */
}
void lcdwinamp_HD44780_output(PrivateData *p, int data)
{
// Setup data bus
port_out(p->port, data);
// Strobe the latch (374 latches on rising edge, 3/574 on trailing. No matter)
port_out (p->port + 2, (LE | p->backlight_bit) ^ OUTMASK);
if ( p->delayBus ) p->hd44780_functions->uPause (p, 1);
port_out (p->port + 2, (p->backlight_bit) ^ OUTMASK);
if ( p->delayBus ) p->hd44780_functions->uPause (p, 1);
}