[PATCH 2/2] driver for Zhen Hua PCM-4CH RC transmitter v2

[Kmarty <gkmarty@gmail.com>]

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(again, now as attachments)

Patch for inputattach from joystick-utils.

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 inputattach.c |   39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

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--- inputattach.c.orig	2008-02-06 10:35:22.000000000 +0100
+++ inputattach.c	2008-02-13 15:49:48.000000000 +0100
@@ -1,5 +1,4 @@
 /*
- * $Id: inputattach.c 2352 2006-02-08 12:19:31Z vojtech $
  *
  *  Copyright (c) 1999-2000 Vojtech Pavlik
  *
@@ -315,6 +314,42 @@
 	return 0;
 }
 
+int zhenhua_init(int fd, long *id, long *extra)
+{
+	/* Zhen Hua 5 byte protokol: prvni (synchronizacni) byte obsahuje vzdy 0xF7,
+	 * nasledujici ctyri pak jednotlive osy ovladace v intervalu 50-200.
+	 * Pozor, nacitana data (jednotlive bajty) jsou bitove prevracene (nejnizsi
+	 * bit je nejvyssim bitem) - neco jako little-endian na bitove urovni.
+	 * Synchronizacni byte ma tedy bez prevraceni hodnotu 0xEF
+	 *
+	 * Inicializace je temer shodna s twiddlerem */
+
+	unsigned char c[10];
+	int count;
+
+	for (count=0 ; count < 5 ; count++) {
+		if(readchar(fd, c+0, 500)) return -1;
+		if(c[0] == 0xef) break;
+	}
+
+	if (count == 5) {
+		/* Could not find header byte in data stream */
+		return -1;
+	}
+
+	/* Read remaining 4 bytes plus the full next data packet */
+	for (count = 1; count < 10; count++) {
+		if (readchar(fd, c+count, 500)) return -1;
+	}
+
+	/* check if next sync byte exists */
+	if (c[5] != 0xef)
+		return -1;
+
+	return 0;
+		
+}
+
 int dump_init(int fd, long *id, long *extra)
 {
 	unsigned char c, o = 0;
@@ -376,6 +411,7 @@
 { "--elo4002",		"-elo6b",	B9600, CS8 | CRTSCTS,		SERIO_ELO,	1,	0,	0,	NULL },
 { "--elo271-140",	"-elo4b",	B9600, CS8 | CRTSCTS,		SERIO_ELO,	2,	0,	0,	NULL },
 { "--elo261-280",	"-elo3b",	B9600, CS8 | CRTSCTS,		SERIO_ELO,	3,	0,	0,	NULL },
+{ "--zhen-hua",		"-zhen",	B19200, CS8, 			SERIO_ZHENHUA,	0,	0,	0,	zhenhua_init },
 { "--dump",		"-dump",	B2400, CS8, 			0,		0,	0,	0,	dump_init },
 { "", "", 0, 0 }
 
@@ -416,6 +452,7 @@
 		puts("  --ps2serkbd     -ps2ser PS/2 via serial keyboard");
 		puts("  --twiddler      -twid   Handykey Twiddler chording keyboard");
 		puts("  --twiddler-joy  -twidjoy  Handykey Twiddler used as a joystick");
+		puts("  --zhen-hua      -zhen  Zhen Hua 5-byte protocol");
 		puts("");
                 return 1;
         }