mangavalk/lcdproc
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clean-up and document

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marschap
2007-10-14 08:42:12 +00:00
parent 2dda4f1cac
commit 8cfd341944
1 changed files with 81 additions and 50 deletions
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server/drivers/hd44780-lis2.c
+81 -50
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@@ -14,6 +14,7 @@
* 2001-2002, Joris Robijn <joris@robijn.net>
* 2005, Pillon Matteo <matteo.pillon@email.it>
* 2005, Laurent ARNAL <laurent@clae.net>
* 2007, Peter Marschall <peter@adpm.de>
*
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
@@ -46,11 +47,11 @@ void lis2_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned cha
void lis2_HD44780_backlight(PrivateData *p, unsigned char state);
unsigned char lis2_HD44780_scankeypad(PrivateData *p);
static void SetMatrice(PrivateData *p,int fd, int matriceNum, int ligne, int point);
static void SetFan(int fd, int fan1, int fan2, int fan3, int fan4);
static void gotoXY(int fd, int x, int y);
static void setLIS2CustomCharRow(int fd, unsigned char custom, unsigned char row, unsigned char data);
static void setLIS2Fan(int fd, int fan1, int fan2, int fan3, int fan4);
static void gotoXY(int fd, unsigned char x, unsigned char y);
static void writeChar(int fd, int code);
static void writeChar(int fd, unsigned char code);
// initialise the driver
@@ -105,19 +106,32 @@ int hd_init_lis2(Driver *drvthis)
}
static void SetMatrice(PrivateData *p, int fd, int matriceNum, int ligne, int point)
/**
* Set one pixel row of a custom character, valid on LIS2 devices only.
* \param fd File handle to write to.
* \param custom Custom character to set (from 0 to 7).
* \param row Index of pixel row to set (from (0 [=top] to 7 [=bottom]).
* \param data Pixel data: 5 bit coding from 0 to 31 from right to left (16/8/4/2/1).
*/
static void setLIS2CustomCharRow(int fd, unsigned char custom, unsigned char row, unsigned char data)
{
// char from 0 to 7
// line from 0 to 7 from top to bottom
// pixel 0/1 is 5 bit coding from 0 to 31 from right to left (16/8/4/2/1)
writeChar(p->fd, 0);
writeChar(p->fd, 171);
writeChar(p->fd, matriceNum);
writeChar(fd, ligne);
writeChar(fd, point);
writeChar(fd, 0);
writeChar(fd, 171);
writeChar(fd, custom);
writeChar(fd, row);
writeChar(fd, data);
}
static void SetFan(int fd, int fan1, int fan2, int fan3, int fan4)
/**
* ??? Set fans, valid on LIS2 devices only. ???
* \param fd File handle to write to.
* \param fan1 Data for 1st fan.
* \param fan2 Data for 2nd fan.
* \param fan3 Data for 3rd fan.
* \param fan4 Data for 4th fan.
*/
static void setLIS2Fan(int fd, int fan1, int fan2, int fan3, int fan4)
{
writeChar(fd, 0);
writeChar(fd, 174);
@@ -134,7 +148,13 @@ static void SetFan(int fd, int fan1, int fan2, int fan3, int fan4)
writeChar(fd, 0);
}
static void gotoXY(int fd, int x, int y)
/** Move cursor to given character coordinates.
* \param fd File handle to write to.
* \param x Character column to set cursor to.
* \param y Character row to set cursor to.
*/
static void gotoXY(int fd, unsigned char x, unsigned char y)
{
writeChar(fd, 0);
writeChar(fd, 161 + y);
@@ -142,75 +162,86 @@ static void gotoXY(int fd, int x, int y)
writeChar(fd, 167);
}
static void writeChar(int fd, int code)
{
char buf = code;
write(fd, &buf, 1);
/**
* Write a character.
* \param fd File handle to write to.
* \param ch Character to write.
*/
static void writeChar(int fd, unsigned char code)
{
write(fd, &code, 1);
}
static int mode = 0;
static int charNum = 0;
static int rowNum = 0;
void lis2_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch)
{
if (flags == RS_DATA) {
static int mode = 0;
static unsigned char charNum = 0;
static unsigned char rowNum = 0;
if (flags == RS_DATA) { // RS_DATA: we have data
if (mode == SETCHAR) {
writeChar(p->fd, 0);
writeChar(p->fd, 171);
writeChar(p->fd, charNum);
writeChar(p->fd, rowNum);
writeChar(p->fd, ch);
rowNum++;
if (rowNum == p->cellheight) {
// define row for custom char (reset mode to normal if illegal row)
if (rowNum < p->cellheight)
setLIS2CustomCharRow(p->fd, charNum, rowNum, ch);
else
mode = 0;
rowNum = 0;
}
// increase row counter
rowNum++;
}
else {
// offset given char by one to avoid collisions with command prefix
// TODO: check if this is correct
if (ch < 7)
ch++;
// simply write character byte
write(p->fd, &ch, 1);
}
}
else {
else { // RS_INSTR: we have an instruction
if ((ch & POSITION) != 0) {
int x = 0;
int y = 0;
int pos = 0;
unsigned char divisor = (p->ext_mode) ? 0x20 : 0x40;
pos = (ch & ~POSITION);
// get mangled position by stripping POSITION flag from given data
ch &= ~POSITION;
if (p->ext_mode) {
y = pos / 0x20;
x = pos % 0x20;
}
else {
y = pos / 0x40;
x = pos % 0x40;
}
gotoXY(p->fd, x, y);
// goto X & Y coordinates from un-mangled position
gotoXY(p->fd, ch % divisor, ch / divisor);
}
else if ((ch & SETCHAR) != 0) {
mode = SETCHAR;
charNum = ((ch & ~SETCHAR)/8) + 1;
// extract character to set from given info
charNum = (ch & ~SETCHAR) / 8;
// offset it by one to avoid collisions with command prefix
// TODO: check if this is correct
charNum++;
// restrict it to range [1, 7]
// TODO: check if this is correct
if (charNum == 8)
charNum = 7;
// reset row number
rowNum = 0;
}
else
// simply write through instruction byte
write(p->fd, &ch, 1);
}
}
void lis2_HD44780_backlight(PrivateData *p, unsigned char state)
{
/* No backlight control */
}
unsigned char lis2_HD44780_scankeypad(PrivateData *p)
{
return '\0';