mangavalk/lcdproc
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v0.5 kick-off

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This commit is contained in:
robijn
2001-12-30 00:15:25 +00:00
parent c28d25b795
commit 71056ec551
88 changed files with 6638 additions and 5469 deletions
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server/drivers/hd44780-serialLpt.c
+59 -58
View File
@@ -50,7 +50,7 @@
*/
#include "hd44780-serialLpt.h"
#include "hd44780.h"
#include "hd44780-low.h"
#include "lpt-port.h"
#include "port.h"
@@ -60,12 +60,12 @@
#include <errno.h>
// Hardware specific functions
void lcdserLpt_HD44780_senddata (unsigned char displayID, unsigned char flags, unsigned char ch);
void lcdserLpt_HD44780_backlight (unsigned char state);
void lcdserLpt_HD44780_senddata (PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch);
void lcdserLpt_HD44780_backlight (PrivateData *p, unsigned char state);
unsigned char lcdserLpt_HD44780_scankeypad ();
void rawshift (unsigned char r);
void shiftreg (unsigned char displayID, unsigned char r);
unsigned char lcdserLpt_HD44780_scankeypad (PrivateData *p);
void rawshift (PrivateData *p, unsigned char r);
void shiftreg (PrivateData *p, unsigned char displayID, unsigned char r);
#define RS 32
#define LCDDATA 8
@@ -73,50 +73,46 @@ void shiftreg (unsigned char displayID, unsigned char r);
#define EN1 4
#define EN2 32
static unsigned int lptPort;
static char backlight_bit = 0;
// Initialisation
int
hd_init_serialLpt (HD44780_functions * hd44780_functions, lcd_logical_driver * driver, char *args, unsigned int port)
hd_init_serialLpt (Driver *drvthis)
{
PrivateData *p = (PrivateData*) drvthis->private_data;
HD44780_functions *hd44780_functions = p->hd44780_functions;
unsigned char enableLines = EN1 | EN2;
// Reserve the port registers
lptPort = port;
port_access(lptPort);
port_access(lptPort+1);
port_access(lptPort+2);
port_access(p->port);
port_access(p->port+1);
port_access(p->port+2);
hd44780_functions->senddata = lcdserLpt_HD44780_senddata;
hd44780_functions->backlight = lcdserLpt_HD44780_backlight;
hd44780_functions->scankeypad = lcdserLpt_HD44780_scankeypad;
// setup the lcd in 4 bit mode
shiftreg (enableLines, 3);
hd44780_functions->uPause (15000);
shiftreg (p, enableLines, 3);
hd44780_functions->uPause (p, 15000);
shiftreg (enableLines, 3);
hd44780_functions->uPause (5000);
shiftreg (p, enableLines, 3);
hd44780_functions->uPause (p, 5000);
shiftreg (enableLines, 3);
hd44780_functions->uPause (100);
shiftreg (p, enableLines, 3);
hd44780_functions->uPause (p, 150);
shiftreg (enableLines, 3);
hd44780_functions->uPause (100);
shiftreg (p, enableLines, 2);
hd44780_functions->uPause (p, 100);
shiftreg (enableLines, 2);
hd44780_functions->uPause (100);
hd44780_functions->senddata (p, 0, RS_INSTR, FUNCSET | IF_4BIT | TWOLINE | SMALLCHAR);
hd44780_functions->uPause (p, 40);
hd44780_functions->senddata (0, RS_INSTR, FUNCSET | IF_4BIT | TWOLINE | SMALLCHAR);
common_init ();
common_init (p);
return 0;
}
void
lcdserLpt_HD44780_senddata (unsigned char displayID, unsigned char flags, unsigned char ch)
lcdserLpt_HD44780_senddata (PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch)
{
unsigned char enableLines;
unsigned char portControl = 0;
@@ -134,24 +130,24 @@ lcdserLpt_HD44780_senddata (unsigned char displayID, unsigned char flags, unsign
else
portControl = 0;
shiftreg (enableLines, portControl | h);
shiftreg (enableLines, portControl | l);
shiftreg (p, enableLines, portControl | h);
shiftreg (p, enableLines, portControl | l);
// Restore line status for backlight
port_out (lptPort, backlight_bit );
port_out (p->port, p->backlight_bit );
}
void
lcdserLpt_HD44780_backlight (unsigned char state)
lcdserLpt_HD44780_backlight (PrivateData *p, unsigned char state)
{
// Store new state
backlight_bit = (state?LCDDATA:0);
p->backlight_bit = (state?LCDDATA:0);
// Set line status for backlight
port_out (lptPort, backlight_bit );
port_out (p->port, p->backlight_bit );
}
unsigned char lcdserLpt_HD44780_scankeypad ()
unsigned char lcdserLpt_HD44780_scankeypad (PrivateData *p)
{
// Unfortunately just bit shifting does not work with the 2-wire version...
@@ -162,36 +158,41 @@ unsigned char lcdserLpt_HD44780_scankeypad ()
int i;
unsigned int scancode = 0;
// While scanning the keypad, the 2-wire version executes the 0xFF
// command. This command sets the cursor position, so it's harmless.
// While scanning the keypad, the 2-wire version will place the
// character 0xFF on the current cursor position. Therefor we fisrt
// set the cursor position to -1, so it's harmless.
// I could not prevent this, while staying compatible with both
// wiring versions.
// Clear the shiftregister, needed for 3-wire version
rawshift(0);
hd44780_functions->uPause (2);
rawshift(p, 0);
p->hd44780_functions->uPause (p, 1);
readval = ~ port_in (lptPort + 1) ^ INMASK;
readval = ~ port_in (p->port + 1) ^ INMASK;
inputs_zero = ( (readval >> 4 & 0x03) | (readval >> 5 & 0x04) | (readval >> 3 & 0x08) | (readval << 1 & 0x10) );
if( inputs_zero == 0 ) {
// No keys were pressed
// Restore line status for backlight.
port_out (lptPort, backlight_bit );
port_out (p->port, p->backlight_bit );
return 0;
}
// Set cursor position to -1
p->hd44780_functions->senddata (p, 0, RS_INSTR, POSITION | 127);
p->hd44780_functions->uPause (p, 40);
// Scan the keypad while sending the first half of the command (high nibble)
for (i = 7; i >= 0; i--) { /* MSB first */
port_out (lptPort, LCDDATA); /*set up data */
port_out (lptPort, LCDDATA | LCDCLOCK); /*rising edge of clock */
port_out (p->port, LCDDATA); /*set up data */
port_out (p->port, LCDDATA | LCDCLOCK); /*rising edge of clock */
hd44780_functions->uPause (2);
p->hd44780_functions->uPause (p, 2);
if( !scancode ) {
// Read input line(s)
readval = ~ port_in (lptPort + 1) ^ INMASK;
readval = ~ port_in (p->port + 1) ^ INMASK;
keybits = ( (readval >> 4 & 0x03) | (readval >> 5 & 0x04) | (readval >> 3 & 0x08) | (readval << 1 & 0x10) );
if( keybits != inputs_zero ) {
shiftingbit = 1;
@@ -207,40 +208,40 @@ unsigned char lcdserLpt_HD44780_scankeypad ()
}
// Wait for 2-wire version to clear the latch...
hd44780_functions->uPause (6);
p->hd44780_functions->uPause (p, 6);
// And again for the second half of the command (low nibble).
// Needed for 2-wire version.
rawshift (0xFF);
rawshift (p, 0xFF);
// Wait for 2-wire version to clear the latch...
hd44780_functions->uPause (6);
p->hd44780_functions->uPause (p, 6);
// Restore line status for backlight.
port_out (lptPort, backlight_bit );
port_out (p->port, p->backlight_bit );
return scancode;
}
/* this function sends r out onto the shift register */
void
rawshift (unsigned char r)
rawshift (PrivateData *p, unsigned char r)
{
int i;
for (i = 7; i >= 0; i--) { /* MSB first */
port_out (lptPort, ((r >> i) & 1) * LCDDATA); /*set up data */
port_out (lptPort, (((r >> i) & 1) * LCDDATA) | LCDCLOCK); /*rising edge of clock */
port_out (p->port, ((r >> i) & 1) * LCDDATA); /*set up data */
port_out (p->port, (((r >> i) & 1) * LCDDATA) | LCDCLOCK); /*rising edge of clock */
}
}
// enableLines = value on parallel port to toggle the correct display
void
shiftreg (unsigned char enableLines, unsigned char r)
shiftreg (PrivateData *p, unsigned char enableLines, unsigned char r)
{
rawshift (r | 0x80); // highest bit always set to 1 for Clear for 2-wire version
port_out (lptPort, enableLines); // latch it, to correct display
hd44780_functions->uPause (1);
port_out (lptPort, 0); // for 3-wire version
hd44780_functions->uPause (5); // wait for 2-wire version to clear the latch...
rawshift (p, r | 0x80); // highest bit always set to 1 for Clear for 2-wire version
port_out (p->port, enableLines); // latch it, to correct display
p->hd44780_functions->uPause (p, 1);
port_out (p->port, 0); // for 3-wire version
p->hd44780_functions->uPause (p, 5); // wait for 2-wire version to clear the latch...
}