Add the pifacecad connection type to hd44780 driver (by Thomas Preston). This
is for the PiFace Contral And Display device from http://www.piface.org.uk/.
This commit is contained in:
mmdolze
@@ -20,6 +20,7 @@ v0.5dev (ongoing development)
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* picolcd: Improvements to IR processing (M. Jones)
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+ hd44780: Added 'spi' connection type (S. Dawson)
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* hd55780/serial: Change data escape handling (G. Smith)
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+ hd44780: New connection type 'pifacecad' (T. Preston)
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v0.5.6
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- Remove deprecated CFontz633 driver. Use CFontzPacket with Model=633 instead!
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+1
-1
@@ -233,7 +233,7 @@ dnl else
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HD44780_DRIVERS="$HD44780_DRIVERS hd44780-hd44780-piplate.o"
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fi
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if test "$x_ac_have_spi" = yes; then
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HD44780_DRIVERS="$HD44780_DRIVERS hd44780-hd44780-spi.o"
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HD44780_DRIVERS="$HD44780_DRIVERS hd44780-hd44780-spi.o hd44780-hd44780-pifacecad.o"
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fi
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dnl The hd4470-rpi driver only works on a Raspberry Pi,
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dnl which is an ARM platform. Require people to compile on
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+4
-1
@@ -1,4 +1,4 @@
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.TH LCDd 8 "24 March 2011" LCDproc "LCDproc suite"
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.TH LCDd 8 "February 10, 2014" LCDproc "LCDproc suite"
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.SH NAME
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LCDd - LCDproc server daemon
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@@ -185,6 +185,9 @@ LCD in 4-bit mode driven by PCF8574(A) / PCA9554(A), connected via I2C bus
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.B spi
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LCD with KS0073 or equivalent in serial mode, connected via SPI bus
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.TP
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.B pifacecad
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PiFace Control and Display for the Raspberry Pi (http://www.piface.org.uk/)
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.TP
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.B ftdi
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USB connection via a FTDI FT2232D chip in bitbang mode
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.TP
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@@ -163,6 +163,10 @@ of connection (parallel port, serial port, USB, I2C, SPI or others).
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<entry><literal><link linkend="hd44780-spi">spi</link></literal></entry>
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<entry>Display using a KS0073 or similar in serial mode accessed via Linux SPI device</entry>
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</row>
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<row>
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<entry><literal><link linkend="hd44780-pifacecad">pifacecad</link></literal></entry>
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<entry>PiFace Control and Display for Raspberry Pi</entry>
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</row>
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<!-- Other -->
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<row>
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<entry spanname="fullwidth">Other connection types:</entry>
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@@ -3090,6 +3094,49 @@ KeyDirect_5=Right
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</sect3>
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<sect3 id="hd44780-pifacecad">
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<title>PiFace Control and Display</title>
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<para>
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The <ulink url="http://www.piface.org.uk/products/piface_control_and_display/">PiFace Control and Display for Raspberry Pi</ulink>
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from OpenLX SP Ltd combines a 16x2 Character LCD and navigation buttons using
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the SPI bus on the Rasperry Pi.
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</para>
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<note>
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<para>
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The PiFace Control and Display features a IR receiver, which LCDproc does not
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make use of. You have to setup and use LIRC for that. See
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<ulink url="http://www.piface.org.uk/guides/setting_up_pifacecad/setting_up_PiFace_CAD_to_use_a_remote/">
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Setting up PiFace Control And Display to use a remote</ulink>.
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</para>
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</note>
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<example id="hd44780-pifacecad-config.example">
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<title>HD44780: Configuration example for PiFace Control and Display connection type</title>
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<screen>
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<![CDATA[
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[hd44780]
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ConnectionType=pifacecad
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Device=/dev/spidev0.1
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Size=16x2
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Backlight=yes
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Keypad=yes
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KeyMatrix_1_1=Left
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KeyMatrix_1_2=Down
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KeyMatrix_1_3=Up
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KeyMatrix_1_4=Right
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KeyMatrix_1_5=Escape
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KeyMatrix_1_6=Enter
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KeyMatrix_1_7=Left
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KeyMatrix_1_8=Right
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]]>
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</screen>
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</example>
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</sect3>
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</sect2>
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@@ -3171,6 +3218,7 @@ This can be done by specifying <option>--enable-drivers=all</option> or by inclu
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<parameter><literal>i2c</literal></parameter> |
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<parameter><literal>piplate</literal></parameter> |
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<parameter><literal>spi</literal></parameter> |
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<parameter><literal>pifacecad</literal></parameter> |
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<parameter><literal>ethlcd</literal></parameter> |
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<parameter><literal>raspberrypi</literal></parameter>
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}
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@@ -95,7 +95,7 @@ EXTRA_glcd_SOURCES = glcd-t6963.c t6963_low.c t6963_low.h glcd-png.c glcd-serdis
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glcdlib_SOURCES = lcd.h lcd_lib.h glcdlib.h glcdlib.c report.h
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glk_SOURCES = lcd.h glk.c glk.h glkproto.c glkproto.h report.h
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hd44780_SOURCES = lcd.h lcd_lib.h hd44780.h hd44780.c hd44780-drivers.h hd44780-low.h hd44780-charmap.h report.h adv_bignum.h
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EXTRA_hd44780_SOURCES = port.h lpt-port.h timing.h lcd_sem.c lcd_sem.h hd44780-4bit.c hd44780-4bit.h hd44780-bwct-usb.c hd44780-bwct-usb.h hd44780-ethlcd.c hd44780-ethlcd.h hd44780-ext8bit.c hd44780-ext8bit.h hd44780-ftdi.c hd44780-ftdi.h hd44780-i2c.c hd44780-i2c.h hd44780-lcd2usb.c hd44780-lcd2usb.h hd44780-lis2.c hd44780-lis2.h hd44780-piplate.c hd44780-piplate.h hd44780-rpi.c hd44780-rpi.h hd44780-serial.c hd44780-serial.h hd44780-serialLpt.c hd44780-serialLpt.h hd44780-spi.c hd44780-spi.h hd44780-usb4all.c hd44780-usb4all.h hd44780-usblcd.c hd44780-usblcd.h hd44780-usbtiny.c hd44780-usbtiny.h hd44780-uss720.c hd44780-uss720.h hd44780-winamp.c hd44780-winamp.h
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EXTRA_hd44780_SOURCES = port.h lpt-port.h timing.h lcd_sem.c lcd_sem.h hd44780-4bit.c hd44780-4bit.h hd44780-bwct-usb.c hd44780-bwct-usb.h hd44780-ethlcd.c hd44780-ethlcd.h hd44780-ext8bit.c hd44780-ext8bit.h hd44780-ftdi.c hd44780-ftdi.h hd44780-i2c.c hd44780-i2c.h hd44780-lcd2usb.c hd44780-lcd2usb.h hd44780-lis2.c hd44780-lis2.h hd44780-pifacecad.c hd44780-pifacecad.h hd44780-piplate.c hd44780-piplate.h hd44780-rpi.c hd44780-rpi.h hd44780-serial.c hd44780-serial.h hd44780-serialLpt.c hd44780-serialLpt.h hd44780-spi.c hd44780-spi.h hd44780-usb4all.c hd44780-usb4all.h hd44780-usblcd.c hd44780-usblcd.h hd44780-usbtiny.c hd44780-usbtiny.h hd44780-uss720.c hd44780-uss720.h hd44780-winamp.c hd44780-winamp.h
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i2500vfd_SOURCES = lcd.h i2500vfd.c i2500vfd.h glcd_font5x8.h report.h
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icp_a106_SOURCES = lcd.h lcd_lib.h icp_a106.c icp_a106.h report.h
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imon_SOURCES = lcd.h lcd_lib.h hd44780-charmap.h imon.h imon.c report.h adv_bignum.h
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@@ -35,6 +35,7 @@
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#endif
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#ifdef HAVE_SPI
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# include "hd44780-spi.h"
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# include "hd44780-pifacecad.h"
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#endif
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#ifdef WITH_ETHLCD
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# include "hd44780-ethlcd.h"
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@@ -88,6 +89,7 @@ static const ConnectionMapping connectionMapping[] = {
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#endif
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#ifdef HAVE_SPI
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{ "spi", HD44780_CT_SPI, IF_TYPE_SPI, hd_init_spi },
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{ "pifacecad", HD44780_CT_PIFACECAD, IF_TYPE_SPI, hd_init_pifacecad },
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#endif
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/* TCP socket connection types */
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#ifdef WITH_ETHLCD
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@@ -56,6 +56,7 @@
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#define HD44780_CT_RASPBERRYPI 22
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#define HD44780_CT_PIPLATE 23
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#define HD44780_CT_SPI 24
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#define HD44780_CT_PIFACECAD 25
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/**@}*/
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/** \name Symbolic names for interface types
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@@ -0,0 +1,365 @@
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/** \file server/drivers/hd44780-pifacecad.c
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* \c PiFace Control and Display connection type (SPI) of \c hd44780 driver for
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* Hitachi HD44780 based LCD displays.
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*
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* The LCD is operated in its 4 bit-mode to be connected to the 8 bit Port B
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* of a single MCP23S17 that is accessed by the server via the SPI bus.
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*/
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/*-
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* Copyright (c) 2013 Thomas Preston <thomas.preston@openlx.org.uk>
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*
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* Based mostly on the hd44780-i2c module, see there for a complete history.
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*
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* This file is released under the GNU General Public License. Refer to the
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* COPYING file distributed with this package.
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*/
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/*-
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* The connections are (MCP23S17):
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* Port A Pin 0 Switch 0 (Left)
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* Port A Pin 1 Switch 1 (Down)
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* Port A Pin 2 Switch 2 (Up)
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* Port A Pin 3 Switch 3 (Right)
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* Port A Pin 4 Switch 4 (Enter)
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* Port A Pin 5 Switch 5 (Nav push)
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* Port A Pin 6 Switch 6 (Nav left)
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* Port A Pin 6 Switch 7 (Nav right)
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* Port B Pin 0 D4
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* Port B Pin 1 D5
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* Port B Pin 2 D6
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* Port B Pin 3 D7
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* Port B Pin 4 EN
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* Port B Pin 5 RW
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* Port B Pin 6 RS
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*
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* Backlight
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* Port B Pin 7 Backlight (optional, active-high)
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*
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* Configuration:
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* device=/dev/spidev0.1 # the device file of the SPI bus
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "hd44780-pifacecad.h"
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#include "hd44780-low.h"
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#include "report.h"
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <stdint.h>
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#include <linux/spi/spidev.h>
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void pifacecad_HD44780_senddata(PrivateData *p,
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unsigned char displayID, unsigned char flags, unsigned char ch);
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void pifacecad_HD44780_backlight(PrivateData *p, unsigned char state);
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void pifacecad_HD44780_close(PrivateData *p);
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unsigned char pifacecad_HD44780_scankeypad(PrivateData *p);
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/** \name SPI bus configuration
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*@{*/
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#define DEFAULT_DEVICE "/dev/spidev0.1"
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#define SPI_HW_ADDR 0 /**< Hardware address set by pins A0:2 */
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const unsigned char spi_mode = 0; /**< Set SPI mode to CPOL = 0 (leading edge is rising)
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* and CPHA = 0 (sample on leading edge) */
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const unsigned char spi_bpw = 8; /**< Set SPI to 8 bits per word */
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const unsigned long spi_speed = 10000000L; /**< Set SPI speed to 10MHz */
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const unsigned char spi_delay = 0;
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/**@}*/
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/** \name MCP23S17 commands
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*@{*/
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#define WRITE_CMD 0
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#define READ_CMD 1
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/**@}*/
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/** \name MCP23S17 Register addresses
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*@{*/
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#define IODIRA 0x00 /**< I/O direction A */
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#define IODIRB 0x01 /**< I/O direction B */
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#define IPOLA 0x02 /**< Input polarity A */
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#define IPOLB 0x03 /**< Input polarity B */
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#define IOCON 0x0A /**< I/O config (also 0x0B) */
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#define GPPUA 0x0C /**< Port A pull-ups when input */
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#define GPPUB 0x0D /**< Port B pull-ups when input */
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#define GPIOA 0x12 /**< Port A */
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#define GPIOB 0x13 /**< Port B */
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/**@}*/
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/* Ports */
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#define SWITCH_PORT GPIOA /**< Switches are connected to port A */
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#define LCD_PORT GPIOB /**< LCD and backlight are connected to port B */
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/* LCD timing delays */
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#define DELAY_PULSE_US 1 /**< 1us hold time for EN */
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#define DELAY_SETTLE_US 40 /**< 40us delay for executing LCD command */
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/** \name LCD control pins
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* LCD control pins are connected to upper nibble of Port B on the MCP23S17
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*@{*/
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#define EN 0x10
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#define RW 0x20
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#define RS 0x40
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#define BL 0x80
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/**@}*/
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/**
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* Writes to a register on the MCP23S17.
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*
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* \param p Pointer to PrivateData structure.
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* \param reg Register address to write to.
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* \param data Data to write
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*/
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static void
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mcp23s17_write_reg(PrivateData *p, unsigned char reg, unsigned char data)
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{
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unsigned char tx_buf[3] = { 0x40 | SPI_HW_ADDR | WRITE_CMD, reg, data };
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unsigned char rx_buf[3];
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struct spi_ioc_transfer spi;
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spi.tx_buf = (unsigned long) tx_buf;
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spi.rx_buf = (unsigned long) rx_buf;
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spi.len = sizeof(tx_buf);
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spi.delay_usecs = spi_delay;
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spi.speed_hz = spi_speed;
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spi.bits_per_word = spi_bpw;
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/* do the SPI transaction */
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if (ioctl(p->fd, SPI_IOC_MESSAGE(1), &spi) < 0) {
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p->hd44780_functions->drv_report(RPT_ERR,
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"HD44780: PiFaceCAD: mcp23s17_write_reg: There was "
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"a error during the SPI transaction: %s",
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strerror(errno));
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}
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}
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/**
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* Reads from a register on the MCP23S17.
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*
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* \param p Pointer to PrivateData structure.
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* \param reg Register address to read from.
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* \retval Value of the register. Returns zero (0) on error, too.
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*/
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static unsigned char
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mcp23s17_read_reg(PrivateData *p, unsigned char reg)
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{
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unsigned char tx_buf[3] = { 0x40 | SPI_HW_ADDR | READ_CMD, reg, 0 };
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unsigned char rx_buf[3] = { 0, 0, 0 };
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struct spi_ioc_transfer spi;
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spi.tx_buf = (unsigned long) tx_buf;
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spi.rx_buf = (unsigned long) rx_buf;
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spi.len = sizeof(tx_buf);
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spi.delay_usecs = spi_delay;
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spi.speed_hz = spi_speed;
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spi.bits_per_word = spi_bpw;
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/* do the SPI transaction */
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if (ioctl(p->fd, SPI_IOC_MESSAGE(1), &spi) < 0) {
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p->hd44780_functions->drv_report(RPT_ERR,
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"HD44780: PiFaceCAD: mcp23s17_read_reg: There was"
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"a error during the SPI transaction: %s",
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strerror(errno));
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return 0;
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}
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return rx_buf[2];
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}
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/**
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* Writes control and data to HD44780 through Port B on MCP23S17.
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*
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* \param p Pointer to the PrivateData structure.
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* \param data The data to write.
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*/
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static void
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write_and_pulse(PrivateData *p, unsigned char data)
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{
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/* Enable: Off/On/Off - Doesn't seem to work any other way. */
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mcp23s17_write_reg(p, LCD_PORT, data);
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if (p->delayBus)
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p->hd44780_functions->uPause(p, DELAY_PULSE_US);
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mcp23s17_write_reg(p, LCD_PORT, data | EN);
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if (p->delayBus)
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p->hd44780_functions->uPause(p, DELAY_PULSE_US);
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mcp23s17_write_reg(p, LCD_PORT, data);
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p->hd44780_functions->uPause(p, DELAY_SETTLE_US);
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}
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/**
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* Initialize the driver.
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*
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* \param drvthis Pointer to driver structure.
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* \retval 0 Success.
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* \retval -1 Error.
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*/
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int
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hd_init_pifacecad(Driver *drvthis)
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{
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PrivateData *p = (PrivateData *) drvthis->private_data;
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HD44780_functions *hd44780_functions = p->hd44780_functions;
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char device[256] = DEFAULT_DEVICE;
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p->backlight_bit = BL; /* Backlight on during init */
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/* READ CONFIG FILE */
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/* Get serial device to use */
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strncpy(device, drvthis->config_get_string(drvthis->name, "Device", 0, DEFAULT_DEVICE), sizeof(device));
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device[sizeof(device) - 1] = '\0';
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report(RPT_INFO, "HD44780: PiFaceCAD: Using device '%s'", device);
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/* Open the SPI device */
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if ((p->fd = open(device, O_RDWR)) < 0) {
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report(RPT_ERR,
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"HD44780: PiFaceCAD: open SPI device '%s' failed: %s",
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device, strerror(errno));
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return -1;
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}
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/* configure SPI device */
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if (ioctl(p->fd, SPI_IOC_WR_MODE, &spi_mode) < 0) {
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report(RPT_ERR, "HD44780: PiFaceCAD: Could not set SPI mode.");
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return -1;
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}
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if (ioctl(p->fd, SPI_IOC_WR_BITS_PER_WORD, &spi_bpw) < 0) {
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report(RPT_ERR, "HD44780: PiFaceCAD Could not set SPI bits per word.");
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return -1;
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}
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if (ioctl(p->fd, SPI_IOC_WR_MAX_SPEED_HZ, &spi_speed) < 0) {
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report(RPT_ERR, "HD44780: PiFaceCAD: Could not set SPI speed.");
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return -1;
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}
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/* Set IO config */
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mcp23s17_write_reg(p, IOCON, 0x08); /* Hardware Address Enable */
|
||||
mcp23s17_write_reg(p, IODIRB, 0x00); /* Set GPIOB (LCD port) to output */
|
||||
mcp23s17_write_reg(p, IODIRA, 0xff); /* Set GPIOA (switches) to input */
|
||||
mcp23s17_write_reg(p, GPPUA, 0xff); /* enable pull-ups on input */
|
||||
mcp23s17_write_reg(p, IPOLA, 0xff); /* invert inputs */
|
||||
|
||||
hd44780_functions->senddata = pifacecad_HD44780_senddata;
|
||||
hd44780_functions->backlight = pifacecad_HD44780_backlight;
|
||||
hd44780_functions->close = pifacecad_HD44780_close;
|
||||
hd44780_functions->scankeypad = pifacecad_HD44780_scankeypad;
|
||||
|
||||
/* Send 0x03 a couple of times, which is ((FUNCSET | IF_8BIT) >> 4) */
|
||||
write_and_pulse(p, 0x03);
|
||||
hd44780_functions->uPause(p, 15000);
|
||||
|
||||
write_and_pulse(p, 0x03);
|
||||
hd44780_functions->uPause(p, 5000);
|
||||
|
||||
write_and_pulse(p, 0x03);
|
||||
hd44780_functions->uPause(p, 1000);
|
||||
|
||||
/* Now switch to IF_4BIT */
|
||||
write_and_pulse(p, 0x02);
|
||||
hd44780_functions->uPause(p, DELAY_SETTLE_US);
|
||||
|
||||
common_init(p, IF_4BIT);
|
||||
|
||||
report(RPT_INFO, "HD44780: PiFaceCAD: initialized");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Closes the file descriptor of the HD44780 (SPI bus to MCP23S17).
|
||||
*
|
||||
* \param p Pointer to driver's private data structure.
|
||||
*/
|
||||
void
|
||||
pifacecad_HD44780_close(PrivateData *p)
|
||||
{
|
||||
if (p->fd >= 0) {
|
||||
close(p->fd);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Send data or commands to the display.
|
||||
*
|
||||
* \param p Pointer to driver's private data structure.
|
||||
* \param displayID ID of the display (or 0 for all) to send data to.
|
||||
* \param flags Defines whether to end a command or data.
|
||||
* \param ch The value to send.
|
||||
*/
|
||||
void
|
||||
pifacecad_HD44780_senddata(PrivateData *p,
|
||||
unsigned char displayID, unsigned char flags, unsigned char ch)
|
||||
{
|
||||
unsigned char portControl = 0;
|
||||
unsigned char h = (ch >> 4) & 0x0f; /* high nibble */
|
||||
unsigned char l = ch & 0x0f; /* low nibble */
|
||||
|
||||
if (flags == RS_INSTR)
|
||||
portControl = 0;
|
||||
else
|
||||
portControl = RS;
|
||||
|
||||
portControl |= p->backlight_bit;
|
||||
|
||||
write_and_pulse(p, portControl | h);
|
||||
write_and_pulse(p, portControl | l);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Turn display backlight on or off.
|
||||
*
|
||||
* \param p Pointer to driver's private data structure.
|
||||
* \param state New backlight status.
|
||||
*/
|
||||
void
|
||||
pifacecad_HD44780_backlight(PrivateData *p, unsigned char state)
|
||||
{
|
||||
unsigned char port_state = mcp23s17_read_reg(p, LCD_PORT);
|
||||
p->backlight_bit = (state == BACKLIGHT_ON) ? BL : 0;
|
||||
if (p->backlight_bit)
|
||||
port_state |= BL; /* set */
|
||||
else
|
||||
port_state &= 0xff ^ BL; /* clear */
|
||||
mcp23s17_write_reg(p, LCD_PORT, port_state);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Scan the LCD keys. Each button is connected to a pin on Port A. As the
|
||||
* hd44780 driver only supports 5 direct keys return the pressed key as a
|
||||
* matrix key code instead.
|
||||
*
|
||||
* \param p Pointer to driver's private data structure.
|
||||
* \retval key Key code as matrix code (1,1) to (1,8).
|
||||
*/
|
||||
unsigned char
|
||||
pifacecad_HD44780_scankeypad(PrivateData *p)
|
||||
{
|
||||
unsigned char keycode = 0;
|
||||
unsigned char switch_state;
|
||||
int i;
|
||||
|
||||
if ((switch_state = mcp23s17_read_reg(p, SWITCH_PORT)) == 0)
|
||||
return 0;
|
||||
|
||||
/* detect which key is pressed (which bit is set) */
|
||||
for (i = 0; i < 8; i++) {
|
||||
if (switch_state & (1 << i)) {
|
||||
/* convert to matrix code */
|
||||
keycode = ((i + 1) << 4 | 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return keycode;
|
||||
}
|
||||
@@ -0,0 +1,9 @@
|
||||
#ifndef HD_PIFACECAD_H
|
||||
#define HD_PIFACECAD_H
|
||||
|
||||
#include "lcd.h" /* for Driver */
|
||||
|
||||
/* initialise this particular driver */
|
||||
int hd_init_pifacecad(Driver *drvthis);
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user