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more complete hd44780 initialization; a bit more dox; typo fixes in docs

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This commit is contained in:
marschap
2007-12-26 15:40:58 +00:00
parent 6a81513049
commit d64dcf7e11
4 changed files with 33 additions and 20 deletions
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server/drivers/hd44780.c
+14 -6
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@@ -456,16 +456,20 @@ HD44780_init(Driver *drvthis)
/**
* Common initialisation sequence - sets cursor off and not blinking,
* clear display and homecursor
* Does not set twoline mode nor small characters (5x8). The init function of
* the connectiontype should do this.
* Common initialisation sequence:
* - set twoline mode, small (5x8) charactersi & 4- or 8-bit mode
* - set display on & cursor off, not blinking,
* - set output mode to lefto-to-right & turn off display scolling
* - clear display & move cursor home
* .
* \param p Pointer to PrivateData structure.
* \param if_bit Command bits for 4- resp. 8-bit mode
*/
void
common_init(PrivateData *p, unsigned char if_bit)
{
if (p->ext_mode) {
// Set up extended mode */
// Set up extended mode
p->hd44780_functions->senddata(p, 0, RS_INSTR, FUNCSET | if_bit | TWOLINE | SMALLCHAR | EXTREG);
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, EXTMODESET | FOURLINE);
@@ -475,6 +479,8 @@ common_init(PrivateData *p, unsigned char if_bit)
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, ONOFFCTRL | DISPON | CURSOROFF | CURSORNOBLINK);
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, ENTRYMODE | E_MOVERIGHT | NOSCROLL);
p->hd44780_functions->uPause(p, 40);
p->hd44780_functions->senddata(p, 0, RS_INSTR, CLEAR);
p->hd44780_functions->uPause(p, 1600);
p->hd44780_functions->senddata(p, 0, RS_INSTR, HOMECURSOR);
@@ -483,7 +489,9 @@ common_init(PrivateData *p, unsigned char if_bit)
/**
* Delay a number of microseconds
* Delay a number of microseconds.
* \param p Pointer to PrivateData structure.
* \param usecs Number of micro-seconds to sleep.
*/
void
uPause(PrivateData *p, int usecs)