mirror of
https://github.com/netfun2000/lcd4linux.git
synced 2026-02-27 09:44:34 +08:00
[lcd4linux @ 2004-01-30 07:12:35 by reinelt]
HD44780 busy-flag support from Martin Hejl loadavg() uClibc replacement from Martin Heyl round() uClibc replacement from Martin Hejl warning in i2c_sensors fixed [ git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@347 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
This commit is contained in:
reinelt
216
drv_HD44780.c
216
drv_HD44780.c
@@ -1,4 +1,4 @@
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/* $Id: drv_HD44780.c,v 1.6 2004/01/29 04:40:02 reinelt Exp $
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/* $Id: drv_HD44780.c,v 1.7 2004/01/30 07:12:35 reinelt Exp $
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*
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* new style driver for HD44780-based displays
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*
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@@ -29,6 +29,13 @@
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*
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*
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* $Log: drv_HD44780.c,v $
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* Revision 1.7 2004/01/30 07:12:35 reinelt
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* HD44780 busy-flag support from Martin Hejl
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* loadavg() uClibc replacement from Martin Heyl
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* round() uClibc replacement from Martin Hejl
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* warning in i2c_sensors fixed
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* [
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*
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* Revision 1.6 2004/01/29 04:40:02 reinelt
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* every .c file includes "config.h" now
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*
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@@ -70,6 +77,7 @@
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#include <unistd.h>
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#include <termios.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include "debug.h"
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#include "cfg.h"
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@@ -95,6 +103,7 @@ static char Name[]="HD44780";
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#define T_PW 450 // Enable pulse width
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#define T_AS 60 // Address setup time
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#define T_H 40 // Data hold time
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#define T_AH 20 // Address hold time
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/* HD44780 execution timings [microseconds]
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@@ -106,12 +115,13 @@ static char Name[]="HD44780";
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#define T_INIT2 100 // second init sequence: 100 usec
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#define T_EXEC 80 // normal execution time
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#define T_WRCG 120 // CG RAM Write
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#define T_CLEAR 1640 // Clear Display
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#define T_CLEAR 1680 // Clear Display
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static int Bits=0;
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static int Controllers = 0;
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static int Controller = 0;
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static int numControllers = 0;
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static int allControllers = 0;
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static int currController = 0;
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static unsigned char SIGNAL_RW;
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static unsigned char SIGNAL_RS;
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@@ -119,6 +129,11 @@ static unsigned char SIGNAL_ENABLE;
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static unsigned char SIGNAL_ENABLE2;
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static unsigned char SIGNAL_GPO;
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/* maximum time to wait for the busy-flag (in usec) */
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#define MAX_BUSYFLAG_WAIT 100000
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static int use_busy_flag = 0;
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// Fixme
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static int GPOS;
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// static int GPO=0;
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@@ -128,6 +143,107 @@ static int GPOS;
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// *** hardware dependant functions ***
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// ****************************************
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static void wait_for_busy_flag(int controller)
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{
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unsigned char enable;
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unsigned int counter;
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unsigned char data=0xFF;
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unsigned char busymask=0;
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if (Bits==8) {
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busymask = 0x80;
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} else {
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/* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD
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(and consequently, DB3 on the partport is mapped to DB7 on the LCD)
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we need to listen for DB3 on the parport to go low
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*/
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busymask = 0x8;
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}
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enable=SIGNAL_ENABLE;
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while (controller > 0) {
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if (controller&0x01 && enable!=0) {
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/* set data-lines to input*/
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drv_generic_parport_direction(1);
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if (Bits==8) {
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// Set RW, clear RS
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drv_generic_parport_control(SIGNAL_RW|SIGNAL_RS,SIGNAL_RW);
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} else {
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drv_generic_parport_data(SIGNAL_RW);
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}
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// Address set-up time
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ndelay(T_AS);
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// rise ENABLE
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if (Bits==8) {
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drv_generic_parport_control(enable,enable);
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} else {
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drv_generic_parport_data(SIGNAL_RW|enable);
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}
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counter=0;
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while (1) {
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/* read the busy flag */
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data = drv_generic_parport_read();
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if ((data&busymask)==0) break;
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/* make sure we don't wait forever
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- but only check after 5 iterations
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that way, we won't slow down normal mode
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(where we don't need the timeout anyway) */
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counter++;
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if (counter >= 5) {
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struct timeval now, end;
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if (counter == 5) {
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// determine the time when the timeout has expired
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gettimeofday (&end, NULL);
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end.tv_usec+=MAX_BUSYFLAG_WAIT;
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while (end.tv_usec>1000000) {
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end.tv_usec-=1000000;
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end.tv_sec++;
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}
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}
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// get the current time
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gettimeofday(&now, NULL);
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if (now.tv_sec==end.tv_sec?now.tv_usec>=end.tv_usec:now.tv_sec>=end.tv_sec) {
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error ("HD44780: timeout waiting for busy flag on controller %x (%x)", controller, data);
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break;
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}
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}
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}
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// RS=low, RW=low, EN=low
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if (Bits==8) {
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// Lower EN
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drv_generic_parport_control(enable,0);
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// Address hold time
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ndelay(T_AH);
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drv_generic_parport_control(SIGNAL_RW|SIGNAL_RS,0);
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} else {
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// Lower EN
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drv_generic_parport_data(SIGNAL_RW);
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ndelay(T_AH);
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drv_generic_parport_data(0);
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}
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/* set data-lines to output*/
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drv_generic_parport_direction(0);
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}
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enable=SIGNAL_ENABLE2;
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controller=controller >> 1;
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}
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}
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static void drv_HD_nibble(unsigned char controller, unsigned char nibble)
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{
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unsigned char enable;
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@@ -205,8 +321,8 @@ static void drv_HD_command (unsigned char controller, unsigned char cmd, int del
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}
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// wait for command completion
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udelay(delay);
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if (!use_busy_flag) udelay(delay);
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}
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@@ -217,6 +333,8 @@ static void drv_HD_data (unsigned char controller, char *string, int len, int de
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// sanity check
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if (len<=0) return;
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if (use_busy_flag) wait_for_busy_flag(controller);
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if (Bits==8) {
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// enable signal: 'controller' is a bitmask
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@@ -227,13 +345,22 @@ static void drv_HD_data (unsigned char controller, char *string, int len, int de
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if (controller&0x01) enable|=SIGNAL_ENABLE;
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if (controller&0x02) enable|=SIGNAL_ENABLE2;
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// clear RW, set RS
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drv_generic_parport_control (SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
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// Address set-up time
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ndelay(T_AS);
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if (!use_busy_flag) {
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// clear RW, set RS
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drv_generic_parport_control (SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
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// Address set-up time
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ndelay(T_AS);
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}
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while (len--) {
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if (use_busy_flag) {
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wait_for_busy_flag(controller);
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// clear RW, set RS
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drv_generic_parport_control (SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
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// Address set-up time
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ndelay(T_AS);
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}
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// put data on DB1..DB8
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drv_generic_parport_data (*(string++));
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@@ -242,18 +369,19 @@ static void drv_HD_data (unsigned char controller, char *string, int len, int de
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drv_generic_parport_toggle (enable, 1, T_PW);
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// wait for command completion
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udelay(delay);
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if (!use_busy_flag) udelay(delay);
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}
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} else { // 4 bit mode
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while (len--) {
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if (use_busy_flag) wait_for_busy_flag(controller);
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// send data with RS enabled
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drv_HD_byte (controller, *(string++), SIGNAL_RS);
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// wait for command completion
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udelay(delay);
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if (!use_busy_flag) udelay(delay);
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}
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}
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}
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@@ -264,11 +392,11 @@ static void drv_HD_goto (int row, int col)
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int pos;
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// handle multiple displays/controllers
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if (Controllers>1 && row>=DROWS/2) {
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if (numControllers>1 && row>=DROWS/2) {
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row -= DROWS/2;
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Controller = 2;
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currController = 2;
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} else {
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Controller = 1;
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currController = 1;
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}
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// 16x1 Displays are organized as 8x2 :-(
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@@ -284,7 +412,7 @@ static void drv_HD_goto (int row, int col)
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pos=(row%2)*64+(row/2)*20+col;
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}
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drv_HD_command (Controller, (0x80|pos), T_EXEC);
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drv_HD_command (currController, (0x80|pos), T_EXEC);
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}
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@@ -306,11 +434,14 @@ static int drv_HD_start (char *section)
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if (cfg_number(section, "GPOs", 0, 0, 8, &gpos)<0) return -1;
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info ("%s: controlling %d GPO's", Name, gpos);
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if (cfg_number(section, "Controllers", 1, 1, 2, &Controllers)<0) return -1;
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info ("%s: using display with %d controllers", Name, Controllers);
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if (cfg_number(section, "Controllers", 1, 1, 2, &numControllers)<0) return -1;
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info ("%s: using display with %d controllers", Name, numControllers);
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// current controller
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Controller=1;
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currController=1;
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// Bitmask for *all* Controllers
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allControllers = numControllers==2 ? 3 : 1;
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DROWS = rows;
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DCOLS = cols;
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@@ -354,22 +485,35 @@ static int drv_HD_start (char *section)
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// initialize *both* displays
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if (Bits==8) {
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drv_HD_command (0x03, 0x30, T_INIT1); // 8 Bit mode, wait 4.1 ms
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drv_HD_command (0x03, 0x30, T_INIT2); // 8 Bit mode, wait 100 us
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drv_HD_command (0x03, 0x38, T_EXEC); // 8 Bit mode, 1/16 duty cycle, 5x8 font
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drv_HD_command (allControllers, 0x30, T_INIT1); // 8 Bit mode, wait 4.1 ms
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drv_HD_command (allControllers, 0x30, T_INIT2); // 8 Bit mode, wait 100 us
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drv_HD_command (allControllers, 0x38, T_EXEC); // 8 Bit mode, 1/16 duty cycle, 5x8 font
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} else {
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drv_HD_nibble(0x03, 0x03); udelay(T_INIT1); // 4 Bit mode, wait 4.1 ms
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drv_HD_nibble(0x03, 0x03); udelay(T_INIT2); // 4 Bit mode, wait 100 us
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drv_HD_nibble(0x03, 0x03); udelay(T_INIT1); // 4 Bit mode, wait 4.1 ms
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drv_HD_nibble(0x03, 0x02); udelay(T_INIT2); // 4 Bit mode, wait 100 us
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drv_HD_command (0x03, 0x28, T_EXEC); // 4 Bit mode, 1/16 duty cycle, 5x8 font
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drv_HD_nibble (allControllers, 0x03); udelay(T_INIT1); // 4 Bit mode, wait 4.1 ms
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drv_HD_nibble (allControllers, 0x03); udelay(T_INIT2); // 4 Bit mode, wait 100 us
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drv_HD_nibble (allControllers, 0x03); udelay(T_INIT1); // 4 Bit mode, wait 4.1 ms
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drv_HD_nibble (allControllers, 0x02); udelay(T_INIT2); // 4 Bit mode, wait 100 us
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drv_HD_command (allControllers, 0x28, T_EXEC); // 4 Bit mode, 1/16 duty cycle, 5x8 font
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}
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drv_HD_command (allControllers, 0x08, T_EXEC); // Display off, cursor off, blink off
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drv_HD_command (allControllers, 0x0c, T_CLEAR); // Display on, cursor off, blink off, wait 1.64 ms
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drv_HD_command (allControllers, 0x06, T_EXEC); // curser moves to right, no shift
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// Save it in a local variable, until init is complete (for init, we can't use the busy flag)
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if (cfg_number(section, "UseBusy", 0, 0, 1, &use_busy_flag)<0) return -1;
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// Make sure we don't use the busy flag, if it's set to GND
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if (SIGNAL_RW == 0 && use_busy_flag != 0 ) {
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debug("HD44780: Busyflag is to be used, but wiring set RW to GND. Disabling busy-flag");
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use_busy_flag=0;
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}
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drv_HD_command (0x03, 0x08, T_EXEC); // Display off, cursor off, blink off
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drv_HD_command (0x03, 0x0c, T_CLEAR); // Display on, cursor off, blink off, wait 1.64 ms
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drv_HD_command (0x03, 0x06, T_EXEC); // curser moves to right, no shift
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drv_HD_command (0x03, 0x01, T_CLEAR); // clear *both* displays
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drv_HD_command (0x03, 0x03, T_CLEAR); // return home
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info("HD44780: %susing Busyflag", use_busy_flag?"":"not ");
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drv_HD_command (allControllers, 0x01, T_CLEAR); // clear *both* displays
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drv_HD_command (allControllers, 0x03, T_CLEAR); // return home
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return 0;
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}
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@@ -377,15 +521,15 @@ static int drv_HD_start (char *section)
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static void drv_HD_write (char *string, int len)
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{
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drv_HD_data (Controller, string, len, T_EXEC);
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drv_HD_data (currController, string, len, T_EXEC);
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}
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static void drv_HD_defchar (int ascii, char *buffer)
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{
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// define chars on *both* controllers!
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drv_HD_command (0x03, 0x40|8*ascii, T_EXEC);
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drv_HD_data (0x03, buffer, 8, T_WRCG);
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drv_HD_command (allControllers, 0x40|8*ascii, T_EXEC);
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drv_HD_data (allControllers, buffer, 8, T_WRCG);
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}
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@@ -1,4 +1,4 @@
|
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/* $Id: plugin_i2c_sensors.c,v 1.5 2004/01/29 05:55:30 reinelt Exp $
|
||||
/* $Id: plugin_i2c_sensors.c,v 1.6 2004/01/30 07:12:35 reinelt Exp $
|
||||
*
|
||||
* I2C sensors plugin
|
||||
*
|
||||
@@ -22,6 +22,13 @@
|
||||
*
|
||||
*
|
||||
* $Log: plugin_i2c_sensors.c,v $
|
||||
* Revision 1.6 2004/01/30 07:12:35 reinelt
|
||||
* HD44780 busy-flag support from Martin Hejl
|
||||
* loadavg() uClibc replacement from Martin Heyl
|
||||
* round() uClibc replacement from Martin Hejl
|
||||
* warning in i2c_sensors fixed
|
||||
* [
|
||||
*
|
||||
* Revision 1.5 2004/01/29 05:55:30 reinelt
|
||||
* check for /sys mounted
|
||||
*
|
||||
@@ -164,7 +171,7 @@ void my_i2c_sensors_path(void)
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fd1 = opendir(base);
|
||||
if (!fd1) {
|
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error("[i2c_sensors] Impossible to open %s! Is /sys mounted?", base);
|
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return -1;
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return;
|
||||
}
|
||||
|
||||
while((dir = readdir(fd1))) {
|
||||
|
||||
@@ -1,4 +1,4 @@
|
||||
/* $Id: plugin_loadavg.c,v 1.2 2004/01/29 04:40:02 reinelt Exp $
|
||||
/* $Id: plugin_loadavg.c,v 1.3 2004/01/30 07:12:35 reinelt Exp $
|
||||
*
|
||||
* plugin for load average
|
||||
*
|
||||
@@ -23,6 +23,13 @@
|
||||
*
|
||||
*
|
||||
* $Log: plugin_loadavg.c,v $
|
||||
* Revision 1.3 2004/01/30 07:12:35 reinelt
|
||||
* HD44780 busy-flag support from Martin Hejl
|
||||
* loadavg() uClibc replacement from Martin Heyl
|
||||
* round() uClibc replacement from Martin Hejl
|
||||
* warning in i2c_sensors fixed
|
||||
* [
|
||||
*
|
||||
* Revision 1.2 2004/01/29 04:40:02 reinelt
|
||||
* every .c file includes "config.h" now
|
||||
*
|
||||
@@ -49,10 +56,51 @@
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
#include "debug.h"
|
||||
#include "plugin.h"
|
||||
|
||||
#ifndef HAVE_GETLOADAVG
|
||||
|
||||
int getloadavg (double loadavg[], int nelem)
|
||||
{
|
||||
static int fd=-2;
|
||||
char buf[65], *p;
|
||||
ssize_t nread;
|
||||
int i;
|
||||
|
||||
if (fd==-2) fd = open ("/proc/loadavg", O_RDONLY);
|
||||
if (fd < 0) return -1;
|
||||
|
||||
lseek(fd,0,SEEK_SET);
|
||||
nread = read (fd, buf, sizeof buf - 1);
|
||||
//close (fd);
|
||||
|
||||
if (nread < 0) return -1;
|
||||
buf[nread - 1] = '\0';
|
||||
|
||||
if (nelem > 3) nelem = 3;
|
||||
p = buf;
|
||||
for (i = 0; i < nelem; ++i) {
|
||||
char *endp;
|
||||
loadavg[i] = strtod (p, &endp);
|
||||
if (endp == NULL || endp == p)
|
||||
/* This should not happen. The format of /proc/loadavg
|
||||
must have changed. Don't return with what we have,
|
||||
signal an error. */
|
||||
return -1;
|
||||
p = endp;
|
||||
}
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
static void my_loadavg (RESULT *result, RESULT *arg1)
|
||||
{
|
||||
|
||||
20
processor.c
20
processor.c
@@ -1,4 +1,4 @@
|
||||
/* $Id: processor.c,v 1.54 2004/01/29 04:40:02 reinelt Exp $
|
||||
/* $Id: processor.c,v 1.55 2004/01/30 07:12:35 reinelt Exp $
|
||||
*
|
||||
* main data processing
|
||||
*
|
||||
@@ -22,6 +22,13 @@
|
||||
*
|
||||
*
|
||||
* $Log: processor.c,v $
|
||||
* Revision 1.55 2004/01/30 07:12:35 reinelt
|
||||
* HD44780 busy-flag support from Martin Hejl
|
||||
* loadavg() uClibc replacement from Martin Heyl
|
||||
* round() uClibc replacement from Martin Hejl
|
||||
* warning in i2c_sensors fixed
|
||||
* [
|
||||
*
|
||||
* Revision 1.54 2004/01/29 04:40:02 reinelt
|
||||
* every .c file includes "config.h" now
|
||||
*
|
||||
@@ -292,6 +299,17 @@ static struct telmon telmon;
|
||||
extern int tick, tack;
|
||||
static int tick_text, tick_bar, tick_icon, tick_gpo;
|
||||
|
||||
#ifdef DONT_HAVE_ROUND
|
||||
double round(double x) {
|
||||
static int y=0;
|
||||
if (x<0) {
|
||||
y = (x-0.5);
|
||||
} else {
|
||||
y = (x-0.5);
|
||||
}
|
||||
return((double)y);
|
||||
}
|
||||
#endif
|
||||
|
||||
static double query (int token)
|
||||
{
|
||||
|
||||
Reference in New Issue
Block a user