mangavalk/lcdproc
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Added HD44780 delay options.

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This commit is contained in:
robijn
2001-11-01 15:38:49 +00:00
parent 12016257ff
commit 46174150ce
6 changed files with 63 additions and 26 deletions
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server/drivers/hd44780.c
+24 -15
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@@ -112,11 +112,16 @@ static int numDisplays = 0;
// input span list but is kept to save some cpu cycles.
static int *dispSizes = NULL;
// Keypad and backlight option
// Keypad, backlight extended interface and delay options
char have_keypad = 0; // off by default
char have_backlight = 0; // off by default
char extIF = 0; // off by default
// These vars is not static, so it's accessable from all sub-drivers
int delayMult = 1; // Delay multiplier for slow displays
char delayBus = 0; // Delay if the computer can send data too fast over
// its bus to LPT port
// These vars is not static, so it's accessable from
// all sub-drivers
// Indeed, this should become cleaner... later...
// Autorepeat values
@@ -193,6 +198,11 @@ HD44780_init (lcd_logical_driver * driver, char *args)
//// READ THE CONFIG FILE
port = driver->config_get_int( DriverName, "port", 0, 0x278 );
extIF = driver->config_get_bool( DriverName, "extended", 0, 0 );
have_keypad = driver->config_get_bool( DriverName, "keypad", 0, 0 );
have_backlight = driver->config_get_bool( DriverName, "backlight", 0, 0 );
delayMult = driver->config_get_int( DriverName, "delaymult", 0, 1 );
delayBus = driver->config_get_bool( DriverName, "delaybus", 0, 0 );
// Get and search for the connection type
s = driver->config_get_string( DriverName, "connectiontype", 0, "4bit" );
@@ -213,10 +223,6 @@ HD44780_init (lcd_logical_driver * driver, char *args)
}
}
extIF = driver->config_get_bool( DriverName, "extended", 0, 0 );
have_keypad = driver->config_get_bool( DriverName, "keypad", 0, 0 );
have_backlight = driver->config_get_bool( DriverName, "backlight", 0, 0 );
// Get and parse size
s = driver->config_get_string( DriverName, "size", 0, "20x4" );
if( sscanf( s, "%dx%d", &(driver->wid), &(driver->hgt) ) != 2 ) {
@@ -336,8 +342,10 @@ common_init ()
// IO delay to avoid a task switch
//
void
uPause (int delayCalls)
uPause (int usecs)
{
int delay = usecs * delayMult; // To correct for slower displays
#if defined DELAY_GETTIMEOFDAY
struct timeval current_time,delay_time,wait_time;
@@ -346,7 +354,7 @@ uPause (int delayCalls)
// Calculate when delay is over
delay_time.tv_sec = 0;
delay_time.tv_usec = delayCalls;
delay_time.tv_usec = delay;
timeradd(&current_time,&delay_time,&wait_time);
do {
@@ -354,18 +362,19 @@ uPause (int delayCalls)
} while (timercmp(&current_time,&wait_time,<));
#elif defined DELAY_NANOSLEEP
struct timespec delay,remaining;
struct timespec delay_time,remaining;
delay.tv_sec = 0;
delay.tv_nsec = delayCalls * 1000;
while ( nanosleep(&delay,&remaining) == -1 )
delay_time.tv_sec = 0;
delay_time.tv_nsec = delay * 1000;
while ( nanosleep(&delay_time,&remaining) == -1 )
{
delay.tv_sec = remaining.tv_sec;
delay.tv_nsec = remaining.tv_nsec;
delay_time.tv_sec = remaining.tv_sec;
delay_time.tv_nsec = remaining.tv_nsec;
}
#else // using I/O timing
// Assuming every call takes 1us (which can be quite incorrect)
int i;
for (i = 0; i < delayCalls; ++i)
for (i = 0; i < delay; ++i)
port_in (port);
#endif
}