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a few clean-ups

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marschap
2007-10-08 10:42:00 +00:00
parent 16f1ef6e84
commit ea63b7f57e
1 changed files with 157 additions and 73 deletions
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docs/lcdproc-user/drivers/hd44780.docbook
+157 -73
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@@ -436,14 +436,14 @@ The BC327 transistor has the following connections:
<para> <para>
Sometimes the backlight connections are not on the 'main' connector, but on Sometimes the backlight connections are not on the 'main' connector, but on
the side. If that is the case, there is usually NO RESISTOR present to limit the side. If that is the case, there is usually NO RESISTOR present to limit
the current through the LEDs. Therefor you should then add a resistor after the current through the LEDs. Therefore you should then add a resistor after
the transistor of about 10 ohm (see display documentation). the transistor of about 10 ohm (see display documentation).
</para> </para>
</caution> </caution>
<tip> <tip>
<para> <para>
If you want the backlight to light a bit while it's switched 'off', you can If you want the backlight to light a bit while it is "switched off", you can
add a resistor bypassing the transistor from e to c, with a value of, say add a resistor bypassing the transistor from e to c, with a value of, say
47ohm or 22ohm. (My 4x20 has an internal resistor of 6ohm, so with 47 ohm 47ohm or 22ohm. (My 4x20 has an internal resistor of 6ohm, so with 47 ohm
extra it lights at only 1/9th. I like this. Joris.) extra it lights at only 1/9th. I like this. Joris.)
@@ -535,8 +535,8 @@ This is originally based on "lcdtext" (by Matthias Prinke).
<para> <para>
(*) on the RW line of the display: this line decides whether the display receives data from the (*) on the RW line of the display: this line decides whether the display receives data from the
LPT port, or whether it sends data to the LPT port. If grounded, it receives. If High or connected LPT port, or whether it sends data to the LPT port: if grounded it receives, if High or connected
to nothing at all, it "sends" (i.e., will not work as intended). So, if you are not sure that to nothing at all it "sends" (i.e., will not work as intended). So, if you are not sure that
you need it otherwise, then connect it to GND. This certainly applies if you have only one display. you need it otherwise, then connect it to GND. This certainly applies if you have only one display.
</para> </para>
@@ -548,29 +548,47 @@ displays four to seven use:
<table id="hd44780-4bit.multi-mapping"> <table id="hd44780-4bit.multi-mapping">
<title>HD44780: 4bit Pinouts (2)</title> <title>HD44780: 4bit Pinouts (2)</title>
<tgroup cols="2" align="left"> <tgroup cols="4" align="left">
<colspec colname="lpt1"/>
<colspec colname="lpt2"/>
<colspec colname="lcd1"/>
<colspec colname="lcd2"/>
<thead> <thead>
<row> <row>
<entry>printer port</entry> <entry namest="lpt1" nameend="lpt2" align="center">printer port</entry>
<entry>LCD</entry> <entry namest="lcd1" nameend="lcd2" align="center">LCD</entry>
</row>
<row>
<entry>name</entry>
<entry>pin</entry>
<entry>name</entry>
<entry>pin</entry>
</row> </row>
</thead> </thead>
<tbody> <tbody>
<row> <row>
<entry>STR (1)</entry> <entry>STR</entry>
<entry>1</entry>
<entry>EN4</entry> <entry>EN4</entry>
<entry>6</entry>
</row> </row>
<row> <row>
<entry>LF (14)</entry> <entry>LF</entry>
<entry>14</entry>
<entry>EN5</entry> <entry>EN5</entry>
<entry>6</entry>
</row> </row>
<row> <row>
<entry>INIT (16)</entry> <entry>INIT</entry>
<entry>16</entry>
<entry>EN6</entry> <entry>EN6</entry>
<entry>6</entry>
</row> </row>
<row> <row>
<entry>SEL (17)</entry> <entry>SEL</entry>
<entry>17</entry>
<entry>EN7</entry> <entry>EN7</entry>
<entry>6</entry>
</row> </row>
</tbody> </tbody>
</tgroup> </tgroup>
@@ -582,72 +600,94 @@ The optional keypad can be connected as follows:
<table id="hd44780-4bit.keypad-mapping"> <table id="hd44780-4bit.keypad-mapping">
<title>HD44780: 4bit Keypad Pinouts</title> <title>HD44780: 4bit Keypad Pinouts</title>
<tgroup cols="2" align="left"> <tgroup cols="3" align="left">
<colspec colname="lpt1"/>
<colspec colname="lpt2"/>
<thead> <thead>
<row> <row>
<entry>printer port</entry> <entry namest="lpt1" nameend="lpt2" align="center">printer port</entry>
<entry>LCD</entry> <entry align="center">keypad</entry>
</row> </row>
<row>
<entry>name</entry>
<entry>pin</entry>
<entry>pin</entry>
</row>
</thead> </thead>
<tbody> <tbody>
<row> <row>
<entry>D0 (2)</entry> <entry>D0</entry>
<entry>2</entry>
<entry>Y0</entry> <entry>Y0</entry>
</row> </row>
<row> <row>
<entry>D1 (3)</entry> <entry>D1</entry>
<entry>3</entry>
<entry>Y1</entry> <entry>Y1</entry>
</row> </row>
<row> <row>
<entry>D2 (4)</entry> <entry>D2</entry>
<entry>4</entry>
<entry>Y2</entry> <entry>Y2</entry>
</row> </row>
<row> <row>
<entry>D3 (5)</entry> <entry>D3</entry>
<entry>5</entry>
<entry>Y3</entry> <entry>Y3</entry>
</row> </row>
<row> <row>
<entry>D4 (6)</entry> <entry>D4</entry>
<entry>6</entry>
<entry>Y4</entry> <entry>Y4</entry>
</row> </row>
<row> <row>
<entry>D5 (7)</entry> <entry>D5</entry>
<entry>7</entry>
<entry>Y5</entry> <entry>Y5</entry>
</row> </row>
<row> <row>
<entry>nSTRB (1)</entry> <entry>nSTRB</entry>
<entry>1</entry>
<entry>Y6</entry> <entry>Y6</entry>
</row> </row>
<row> <row>
<entry>nLF (14)</entry> <entry>nLF</entry>
<entry>14</entry>
<entry>Y7</entry> <entry>Y7</entry>
</row> </row>
<row> <row>
<entry>INIT (16)</entry> <entry>INIT</entry>
<entry>16</entry>
<entry>Y8</entry> <entry>Y8</entry>
</row> </row>
<row> <row>
<entry>nSEL (17)</entry> <entry>nSEL</entry>
<entry>17</entry>
<entry>Y9</entry> <entry>Y9</entry>
</row> </row>
<row> <row>
<entry>nACK (10)</entry> <entry>nACK</entry>
<entry>10</entry>
<entry>X0</entry> <entry>X0</entry>
</row> </row>
<row> <row>
<entry>BUSY (11)</entry> <entry>BUSY</entry>
<entry>11</entry>
<entry>X1</entry> <entry>X1</entry>
</row> </row>
<row> <row>
<entry>PAPEREND (12)</entry> <entry>PAPEREND</entry>
<entry>12</entry>
<entry>X2</entry> <entry>X2</entry>
</row> </row>
<row> <row>
<entry>SELIN (13)</entry> <entry>SELIN</entry>
<entry>13</entry>
<entry>X3</entry> <entry>X3</entry>
</row> </row>
<row> <row>
<entry>nFAULT (15)</entry> <entry>nFAULT</entry>
<entry>15</entry>
<entry>X4</entry> <entry>X4</entry>
</row> </row>
</tbody> </tbody>
@@ -744,7 +784,7 @@ This type of connection should work with winamp.
<row> <row>
<entry>nLF</entry> <entry>nLF</entry>
<entry>14</entry> <entry>14</entry>
<entry>nRW</entry> <entry>RW</entry>
<entry>5 (EN3 6 - LCD 3) (optional (*) )</entry> <entry>5 (EN3 6 - LCD 3) (optional (*) )</entry>
</row> </row>
<row> <row>
@@ -757,7 +797,7 @@ This type of connection should work with winamp.
<entry>nSEL</entry> <entry>nSEL</entry>
<entry>17</entry> <entry>17</entry>
<entry>EN2</entry> <entry>EN2</entry>
<entry>6 - LCD 2) (optional)</entry> <entry>(6 - LCD 2) (optional)</entry>
</row> </row>
</tbody> </tbody>
</tgroup> </tgroup>
@@ -765,14 +805,14 @@ This type of connection should work with winamp.
<para> <para>
(*) on the RW line of the display: this line decides whether the display receives data from the (*) on the RW line of the display: this line decides whether the display receives data from the
LPT port, or whether it sends data to the LPT port. If grounded, it receives. If High or connected LPT port, or whether it sends data to the LPT port: if grounded it receives, if High or connected
to nothing at all, it "sends" (i.e., will not work as intended). So, if you are not sure that to nothing at all it "sends" (i.e., will not work as intended). So, if you are not sure that
you need it otherwise, then connect it to GND. This certainly applies if you have only one display. you need it otherwise, then connect it to GND. This certainly applies if you have only one display.
</para> </para>
<para> <para>
If you want the display to work with the Winamp plugin, wire nLF (pin 14) If you want the display to work with the Winamp plugin, wire nLF (pin 14)
to nRW of your LCD. You can then use the plugin in bidirectional mode (wich to RW of your LCD. You can then use the plugin in bidirectional mode (wich
is much faster). With 3 connected LCDs this is not possible. is much faster). With 3 connected LCDs this is not possible.
Note from Benjamin: I haven't tried using winamp while having the third LCD Note from Benjamin: I haven't tried using winamp while having the third LCD
connected to this line. connected to this line.
@@ -784,72 +824,94 @@ The optional keypad can be connected as follows:
<table id="hd44780-8bit-winamp.keypad-mapping"> <table id="hd44780-8bit-winamp.keypad-mapping">
<title>HD44780: "Winamp" wiring - Keypad</title> <title>HD44780: "Winamp" wiring - Keypad</title>
<tgroup cols="2" align="left"> <tgroup cols="3" align="left">
<colspec colname="lpt1"/>
<colspec colname="lpt2"/>
<thead> <thead>
<row> <row>
<entry>printer port</entry> <entry namest="lpt1" nameend="lpt2" align="center">printer port</entry>
<entry>keypad</entry> <entry align="center">keypad</entry>
</row>
<row>
<entry>name</entry>
<entry>pin</entry>
<entry>pin</entry>
</row> </row>
</thead> </thead>
<tbody> <tbody>
<row> <row>
<entry>D0 (2)</entry> <entry>D0</entry>
<entry>2</entry>
<entry>Y0</entry> <entry>Y0</entry>
</row> </row>
<row> <row>
<entry>D1 (3)</entry> <entry>D1</entry>
<entry>3</entry>
<entry>Y1</entry> <entry>Y1</entry>
</row> </row>
<row> <row>
<entry>D2 (4)</entry> <entry>D2</entry>
<entry>4</entry>
<entry>Y2</entry> <entry>Y2</entry>
</row> </row>
<row> <row>
<entry>D3 (5)</entry> <entry>D3</entry>
<entry>5</entry>
<entry>Y3</entry> <entry>Y3</entry>
</row> </row>
<row> <row>
<entry>D4 (6)</entry> <entry>D4</entry>
<entry>6</entry>
<entry>Y4</entry> <entry>Y4</entry>
</row> </row>
<row> <row>
<entry>D5 (7)</entry> <entry>D5</entry>
<entry>7</entry>
<entry>Y5</entry> <entry>Y5</entry>
</row> </row>
<row> <row>
<entry>D6 (8)</entry> <entry>D6</entry>
<entry>8</entry>
<entry>Y6</entry> <entry>Y6</entry>
</row> </row>
<row> <row>
<entry>D7 (9)</entry> <entry>D7</entry>
<entry>9</entry>
<entry>Y7</entry> <entry>Y7</entry>
</row> </row>
<row> <row>
<entry>nLF (14)</entry> <entry>nLF</entry>
<entry>14</entry>
<entry>Y8</entry> <entry>Y8</entry>
</row> </row>
<row> <row>
<entry>INIT (16)</entry> <entry>INIT</entry>
<entry>16</entry>
<entry>Y9</entry> <entry>Y9</entry>
</row> </row>
<row> <row>
<entry>nACK (10)</entry> <entry>nACK</entry>
<entry>10</entry>
<entry>X0</entry> <entry>X0</entry>
</row> </row>
<row> <row>
<entry>BUSY (11)</entry> <entry>BUSY</entry>
<entry>11</entry>
<entry>X1</entry> <entry>X1</entry>
</row> </row>
<row> <row>
<entry>PAPEREND (12)</entry> <entry>PAPEREND</entry>
<entry>12</entry>
<entry>X2</entry> <entry>X2</entry>
</row> </row>
<row> <row>
<entry>SELIN (13)</entry> <entry>SELIN</entry>
<entry>13</entry>
<entry>X3</entry> <entry>X3</entry>
</row> </row>
<row> <row>
<entry>nFAULT (15)</entry> <entry>nFAULT</entry>
<entry>15</entry>
<entry>X4</entry> <entry>X4</entry>
</row> </row>
</tbody> </tbody>
@@ -987,8 +1049,8 @@ The LCD connections are:
<para> <para>
(*) on the RW line of the display: this line decides whether the display receives data from the (*) on the RW line of the display: this line decides whether the display receives data from the
LPT port, or whether it sends data to the LPT port. If grounded, it receives. If High or connected LPT port, or whether it sends data to the LPT port: if grounded it receives, if High or connected
to nothing at all, it "sends" (i.e., will not work as intended). So, if you are not sure that to nothing at all it "sends" (i.e., will not work as intended). So, if you are not sure that
you need it otherwise, then connect it to GND. This certainly applies if you have only one display. you need it otherwise, then connect it to GND. This certainly applies if you have only one display.
</para> </para>
@@ -1003,72 +1065,94 @@ The optional keypad can be connected as follows:
<table id="hd44780-8bit-lcdtime.keypad-mapping"> <table id="hd44780-8bit-lcdtime.keypad-mapping">
<title>HD44780: "lcdtime" wiring - keypad</title> <title>HD44780: "lcdtime" wiring - keypad</title>
<tgroup cols="2" align="left"> <tgroup cols="3" align="left">
<colspec colname="lpt1"/>
<colspec colname="lpt2"/>
<thead> <thead>
<row> <row>
<entry>printer port</entry> <entry namest="lpt1" nameend="lpt2" align="center">printer port</entry>
<entry>keypad</entry> <entry align="center">keypad</entry>
</row>
<row>
<entry>name</entry>
<entry>pin</entry>
<entry>pin</entry>
</row> </row>
</thead> </thead>
<tbody> <tbody>
<row> <row>
<entry>D0 (2)</entry> <entry>D0</entry>
<entry>2</entry>
<entry>Y0</entry> <entry>Y0</entry>
</row> </row>
<row> <row>
<entry>D1 (3)</entry> <entry>D1</entry>
<entry>3</entry>
<entry>Y1</entry> <entry>Y1</entry>
</row> </row>
<row> <row>
<entry>D2 (4)</entry> <entry>D2</entry>
<entry>4</entry>
<entry>Y2</entry> <entry>Y2</entry>
</row> </row>
<row> <row>
<entry>D3 (5)</entry> <entry>D3</entry>
<entry>5</entry>
<entry>Y3</entry> <entry>Y3</entry>
</row> </row>
<row> <row>
<entry>D4 (6)</entry> <entry>D4</entry>
<entry>6</entry>
<entry>Y4</entry> <entry>Y4</entry>
</row> </row>
<row> <row>
<entry>D5 (7)</entry> <entry>D5</entry>
<entry>7</entry>
<entry>Y5</entry> <entry>Y5</entry>
</row> </row>
<row> <row>
<entry>D6 (8)</entry> <entry>D6</entry>
<entry>8</entry>
<entry>Y6</entry> <entry>Y6</entry>
</row> </row>
<row> <row>
<entry>D7 (9)</entry> <entry>D7</entry>
<entry>9</entry>
<entry>Y7</entry> <entry>Y7</entry>
</row> </row>
<row> <row>
<entry>nSTRB (1)</entry> <entry>nSTRB</entry>
<entry>1</entry>
<entry>Y8</entry> <entry>Y8</entry>
</row> </row>
<row> <row>
<entry>nSEL (17)</entry> <entry>nSEL</entry>
<entry>17</entry>
<entry>Y9</entry> <entry>Y9</entry>
</row> </row>
<row> <row>
<entry>nACK (10)</entry> <entry>nACK</entry>
<entry>10</entry>
<entry>X0</entry> <entry>X0</entry>
</row> </row>
<row> <row>
<entry>BUSY (11)</entry> <entry>BUSY</entry>
<entry>11</entry>
<entry>X1</entry> <entry>X1</entry>
</row> </row>
<row> <row>
<entry>PAPEREND (12)</entry> <entry>PAPEREND</entry>
<entry>12</entry>
<entry>X2</entry> <entry>X2</entry>
</row> </row>
<row> <row>
<entry>SELIN (13)</entry> <entry>SELIN</entry>
<entry>13</entry>
<entry>X3</entry> <entry>X3</entry>
</row> </row>
<row> <row>
<entry>nFAULT (15)</entry> <entry>nFAULT</entry>
<entry>15</entry>
<entry>X4</entry> <entry>X4</entry>
</row> </row>
</tbody> </tbody>