# HG changeset patch
# User Michiel Broek <mbroek@mbse.eu>
# Date 1444051306 -7200
# Node ID ec507c1f1df7d45c9d88e3cf56c7b10e56ad36c7
# Parent  ee8f851b4d93f57fac7d32044a25ca9bd9ba4614
Make sure that a DS2413 device used as input has the output latch turned off.

diff -r ee8f851b4d93 -r ec507c1f1df7 thermferm/devices.c
--- a/thermferm/devices.c	Fri Sep 18 12:55:49 2015 +0200
+++ b/thermferm/devices.c	Mon Oct 05 15:21:46 2015 +0200
@@ -820,6 +820,28 @@
 				    piUnlock(LOCK_DEVICES);
 #endif
 				}
+				/*
+				 * First make sure that if this device is configured as input
+				 * to drive the output high.
+				 */
+				if (device->direction == DEVDIR_IN_BIN) {
+				    uint8_t state, output;
+
+				    if ((rc = read_w1(device->address, (char *)"state")) >= 0) {
+					state = (unsigned int)rc;
+					output = ((state & 0x02) >> 1) + ((state & 0x08) >> 2);		/* Both latch states	*/
+					if (device->subdevice == 0) {
+					    output = (output & 0xfe);
+					    output |= 0x01;
+					} else if (device->subdevice == 1) {
+					    output = (output & 0xfd);
+					    output |= 0x02;
+					} else {
+					    output = 0xff;
+					}
+					write_w1(device->address, (char *)"output", output);
+				    }
+				}
 				if ((rc = read_w1(device->address, (char *)"state")) >= 0) {
 #ifdef HAVE_WIRINGPI_H
 				    piLock(LOCK_DEVICES);