USB2VFD AIDA64 Display Driver

Makefile.am

@@ -119,6 +119,7 @@ drv_T6963.c                   \
 drv_TeakLCM.c                 \
 drv_Trefon.c                  \
 drv_ula200.c                  \
+drv_USB2VFD.c                 \
 drv_USBHUB.c                  \
 drv_USBLCD.c                  \
 drv_vnc.c                     \

drivers.m4

@@ -39,7 +39,7 @@ AC_ARG_WITH(
   [                        Newhaven, Noritake, NULL, Pertelian, PHAnderson,]
   [                        PICGraphic, picoLCD, picoLCDGraphic, PNG, PPM, RouterBoard,]
   [                        Sample, SamsungSPF, serdisplib, ShuttleVFD, SimpleLCD, st2205, T6963,]
-  [                        TeakLCM, Trefon, ULA200, USBHUB, USBLCD, VNC, WincorNixdorf, X11],
+  [                        TeakLCM, Trefon, ULA200, USB2VFD, USBHUB, USBLCD, VNC, WincorNixdorf, X11],
   drivers=$withval,
   drivers=all
 )
@@ -110,6 +110,7 @@ for driver in $drivers; do
          TeakLCM="yes"
          Trefon="yes"
          ULA200="yes"
+         USB2VFD="yes"
 	 USBHUB="yes"
          USBLCD="yes"
          VNC="yes"
@@ -266,6 +267,9 @@ for driver in $drivers; do
       ULA200)
          ULA200=$val
          ;;
+      USB2VFD)
+         USB2VFD=$val
+         ;;
       USBHUB)
          USBHUB=$val
          ;;
@@ -819,6 +823,13 @@ if test "$ULA200" = "yes"; then
    fi
 fi
 
+if test "$USB2VFD" = "yes"; then
+   TEXT="yes"
+   SERIAL="yes"
+   DRIVERS="$DRIVERS drv_USB2VFD.o"
+   AC_DEFINE(WITH_USB2VFD,1,[USB2VFD driver])
+fi
+
 if test "$USBHUB" = "yes"; then
    if test "$has_usb" = "true"; then
       GPIO="yes"

drv.c

@@ -95,6 +95,7 @@ extern DRIVER drv_T6963;
 extern DRIVER drv_TeakLCM;
 extern DRIVER drv_Trefon;
 extern DRIVER drv_ula200;
+extern DRIVER drv_USB2VFD;
 extern DRIVER drv_USBHUB;
 extern DRIVER drv_USBLCD;
 extern DRIVER drv_vnc;
@@ -254,6 +255,9 @@ DRIVER *Driver[] = {
 #ifdef WITH_ULA200
     &drv_ula200,
 #endif
+#ifdef WITH_USB2VFD
+    &drv_USB2VFD,
+#endif
 #ifdef WITH_USBHUB
     &drv_USBHUB,
 #endif

drv_USB2VFD.c

@@ -0,0 +1,277 @@
+/* $Id$
+ * $URL$
+ *
+ * driver for the Aliexpress AIDA64 USB2VFD displays 40x2
+ * they are compatible-ish with the Matrix Orbital LK displays,
+ * atleast that's the AIDA64 settings you have to use
+ * but in reality they ignore the contrast and brightness commands
+ * and freeze up after any command they don't like, also no custom chars
+ * (it only likes go-home and go-to-position, all the rest are bad)
+ * it also only displays anything if the display buffer is completely filled
+ * special characters: | is °C, \DEL (0x7F) is a full block
+ *
+ * Copyright (C) 2025 Marceline <[email protected]>
+ * Copyright (C) 2005, 2006, 2007 The LCD4Linux Team <[email protected]>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/* 
+ *
+ * exported fuctions:
+ *
+ * struct DRIVER drv_USB2VFD
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include "debug.h"
+#include "cfg.h"
+#include "qprintf.h"
+#include "udelay.h"
+#include "plugin.h"
+#include "widget.h"
+#include "widget_text.h"
+#include "widget_icon.h"
+#include "widget_bar.h"
+#include "drv.h"
+
+/* text mode display? */
+#include "drv_generic_text.h"
+
+/* serial port? */
+#include "drv_generic_serial.h"
+
+static char Name[] = "USB2VFD";
+
+static char dispBuffer[2][44];
+
+/****************************************/
+/***  hardware dependant functions    ***/
+/****************************************/
+
+static int drv_USB2VFD_open(const char *section)
+{
+    /* open serial port */
+    /* don't mind about device, speed and stuff, this function will take care of */
+
+    if (drv_generic_serial_open(section, Name, 0) < 0)
+	return -1;
+
+    return 0;
+}
+
+
+static int drv_USB2VFD_close(void)
+{
+    /* close whatever port you've opened */
+    drv_generic_serial_close();
+
+    return 0;
+}
+
+
+/* dummy function that sends something to the display */
+static void drv_USB2VFD_send(const char *data, const unsigned int len)
+{
+    drv_generic_serial_write(data, len);
+}
+
+/* text mode displays only */
+static void drv_USB2VFD_write(const int row, const int col, const char *data, int len)
+{
+    int i;
+    char home[2] = { 0xFE, 0x48 };
+    char line2[4] = { 0xFE, 0x47, 0x01, 0x02 };
+
+    strncpy(&(dispBuffer[row][col]), data, len);
+
+    drv_USB2VFD_send(home, 2);
+    drv_USB2VFD_send(dispBuffer[0], DCOLS);
+    drv_USB2VFD_send(line2, 4);
+    drv_USB2VFD_send(dispBuffer[1], DCOLS);
+}
+
+/* text mode displays only */
+static void drv_USB2VFD_clear(void)	// ~stolen~ borrowed from the MatrixOrbital Driver
+{
+    int i, j;
+
+    for (i = 0; i < DROWS; i++) {
+	for (j = 0; j < DCOLS + 4; j++) {
+	    dispBuffer[i][j] = ' ';
+	}
+	drv_USB2VFD_write(1, i + 1, dispBuffer[i], DCOLS);
+    }
+}
+
+/* text mode displays only */
+static void drv_USB2VFD_defchar(const int ascii, const unsigned char *matrix)
+{
+
+}
+
+/* start text mode display */
+static int drv_USB2VFD_start(const char *section)
+{
+    DROWS = 2;
+    DCOLS = 40;
+
+    /* open communication with the display */
+    if (drv_USB2VFD_open(section) < 0) {
+	return -1;
+    }
+
+    drv_USB2VFD_clear();	/* clear display */
+
+    return 0;
+}
+
+
+/****************************************/
+/***            plugins               ***/
+/****************************************/
+
+/* none */
+
+
+/****************************************/
+/***        widget callbacks          ***/
+/****************************************/
+
+
+/* using drv_generic_text_draw(W) */
+
+
+/****************************************/
+/***        exported functions        ***/
+/****************************************/
+
+
+/* list models */
+int drv_USB2VFD_list(void)
+{
+    printf("USB2VFD driver");
+    return 0;
+}
+
+
+/* initialize driver & display */
+/* use this function for a text display */
+int drv_USB2VFD_init(const char *section, const int quiet)
+{
+    WIDGET_CLASS wc;
+    int ascii;
+    int ret;
+
+    info("%s: %s", Name, "$Rev$");
+
+    /* display preferences */
+    XRES = 5;			/* pixel width of one char  */
+    YRES = 8;			/* pixel height of one char  */
+    CHARS = 8;			/* number of user-defineable characters */
+    CHAR0 = 0;			/* ASCII of first user-defineable char */
+    GOTO_COST = 4;		/* number of bytes a goto command requires */
+
+    /* real worker functions */
+    drv_generic_text_real_write = drv_USB2VFD_write;
+    drv_generic_text_real_defchar = NULL;
+
+    /* start display */
+    if ((ret = drv_USB2VFD_start(section)) != 0)
+	return ret;
+
+    if (!quiet) {
+	char buffer[40];
+	qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+	if (drv_generic_text_greet(buffer, "Marceline the Vampire Queen!")) {
+	    sleep(3);
+	    drv_USB2VFD_clear();
+	}
+    }
+
+    /* initialize generic text driver */
+    if ((ret = drv_generic_text_init(section, Name)) != 0)
+	return ret;
+
+    /* initialize generic bar driver */
+    if ((ret = drv_generic_text_bar_init(1)) != 0)
+	return ret;
+
+    cfg_number(section, "BarChar", 0x7F, 1, 255, &ascii);
+
+    /* add fixed chars to the bar driver */
+    drv_generic_text_bar_add_segment(0, 0, 255, 32);	/* ASCII  32 = blank */
+    drv_generic_text_bar_add_segment(255, 255, 255, ascii);
+
+
+    /* register text widget */
+    wc = Widget_Text;
+    wc.draw = drv_generic_text_draw;
+    widget_register(&wc);
+
+    /* register bar widget */
+    wc = Widget_Bar;
+    wc.draw = drv_generic_text_bar_draw;
+    widget_register(&wc);
+
+    /* register plugins */
+    // AddFunction("LCD::contrast", 1, plugin_contrast);
+
+    return 0;
+}
+
+
+/* close driver & display */
+/* use this function for a text display */
+int drv_USB2VFD_quit(const int quiet)
+{
+
+    info("%s: shutting down.", Name);
+
+    drv_generic_text_quit();
+
+    /* clear display */
+    drv_USB2VFD_clear();
+
+    /* say goodbye... */
+    if (!quiet) {
+	drv_generic_text_greet("goodbye!", NULL);
+    }
+
+    debug("closing connection");
+    drv_USB2VFD_close();
+
+    return (0);
+}
+
+
+/* use this one for a text display */
+DRIVER drv_USB2VFD = {
+    .name = Name,
+    .list = drv_USB2VFD_list,
+    .init = drv_USB2VFD_init,
+    .quit = drv_USB2VFD_quit,
+};