mangavalk/lcdproc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Make the sed1520 driver work in 80-family connection style without requiring

Browse Source 
an external inverter.
This commit is contained in:
mmdolze
2011-12-29 17:00:49 +00:00
parent cd22706496
commit 1d47d3abc3
4 changed files with 79 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files
server/drivers/sed1520.c
+51 -17
View File
@@ -57,6 +57,7 @@ typedef struct sed1520_private_data {
unsigned short port;
int interface;
int delayMult;
int haveInverter;
unsigned char *framebuf;
} PrivateData;
@@ -90,17 +91,31 @@ writecommand(PrivateData *p, int value, int chip)
}
else {
port_out(p->port, value);
/*
* lower WR, rise A0 and CS1 and/or CS2. Take bit inversion of parallel
* port into account. External inverter required!
*/
port_out(p->port + 2, WR + CS1 - (chip & CS1) + (chip & CS2));
/* rise WR */
port_out(p->port + 2, CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult) uPause(p->delayMult);
/* lower WR again */
port_out(p->port + 2, WR + CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult) uPause(p->delayMult);
if (p->haveInverter) {
/*
* lower WR, rise A0 and CS1 and/or CS2 taking bit inversion of
* parallel port into account. External inverter required!
*/
port_out(p->port + 2, WR + CS1 - (chip & CS1) + (chip & CS2));
/* rise WR */
port_out(p->port + 2, CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult)
uPause(p->delayMult);
/* lower WR again */
port_out(p->port + 2, WR + CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult)
uPause(p->delayMult);
}
else { /* No inverter connected */
/* Note: CS?-(chip&CS?) drive the pin low if controller is set */
port_out(p->port + 2, (WR + CS1 - (chip & CS1) + CS2 - (chip & CS2)) ^ OUTMASK);
port_out(p->port + 2, (CS1 - (chip & CS1) + CS2 - (chip & CS2)) ^ OUTMASK);
if (p->delayMult)
uPause(p->delayMult);
port_out(p->port + 2, (WR + CS1 - (chip & CS1) + CS2 - (chip & CS2)) ^ OUTMASK);
if (p->delayMult)
uPause(p->delayMult);
}
}
}
@@ -123,12 +138,25 @@ writedata(PrivateData *p, int value, int chip)
}
else {
port_out(p->port, value);
/* lower WR and A0, rise CS1 and/or CS2. See also writecommand. */
port_out(p->port + 2, A0 + WR + CS1 - (chip & CS1) + (chip & CS2));
port_out(p->port + 2, A0 + CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult) uPause(p->delayMult);
port_out(p->port + 2, A0 + WR + CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult) uPause(p->delayMult);
if (p->haveInverter) {
/* lower WR and A0, rise CS1 and/or CS2. See also writecommand. */
port_out(p->port + 2, A0 + WR + CS1 - (chip & CS1) + (chip & CS2));
port_out(p->port + 2, A0 + CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult)
uPause(p->delayMult);
port_out(p->port + 2, A0 + WR + CS1 - (chip & CS1) + (chip & CS2));
if (p->delayMult)
uPause(p->delayMult);
}
else {
port_out(p->port + 2, (A0 + WR + CS1 - (chip & CS1) + CS2 - (chip & CS2)) ^ OUTMASK);
port_out(p->port + 2, (A0 + CS1 - (chip & CS1) + CS2 - (chip & CS2)) ^ OUTMASK);
if (p->delayMult)
uPause(p->delayMult);
port_out(p->port + 2, (A0 + WR + CS1 - (chip & CS1) + CS2 - (chip & CS2)) ^ OUTMASK);
if (p->delayMult)
uPause(p->delayMult);
}
}
}
@@ -255,6 +283,12 @@ sed1520_init(Driver * drvthis)
p->interface = 80;
}
/*
* The original wiring used an inverter to drive the control lines. As
* someone may still be using this, the following setting in ON by default.
*/
p->haveInverter = drvthis->config_get_bool(drvthis->name, "haveInverter", 0, 1);
/* Initialize display */
writecommand(p, SOFT_RESET, CS1 + CS2);
writecommand(p, DISP_ON, CS1 + CS2);