Can you try the following patch to see where the failures a re occuring:
diff -B -b -w -U3 -r1.67 ow_1820.c
--- module/owlib/src/c/ow_1820.c 6 Dec 2006 01:50:27 -0000 1.67
+++ module/owlib/src/c/ow_1820.c 8 Dec 2006 01:56:27 -0000
@@ -350,6 +350,7 @@
/* Check for error condition */
if ( data[0]==0xAA && data[1]==0x00 && data[6]==0x0C ) {
+ printf("DS18S20 Temperature "SNformat" 85C error 1st
pass\n",SNvar(pn->sn)) ;
/* repeat the conversion (only once) */
/* Do it the most conservative way -- unpowered */
if ( !pow ) { // unpowered, deliver power, no communication allowed
@@ -359,8 +360,12 @@
UT_delay( delay ) ;
}
if ( OW_r_scratchpad( data , pn ) ) return 1 ;
+ if ( data[0]==0xAA && data[1]==0x00 && data[6]==0x0C ) {
+ printf("DS18S20 Temperature "SNformat" 85C error 2nd
pass\n",SNvar(pn->sn)) ;
+ }
+ } else {
+ printf("DS18S20 Temperature "SNformat" NO ERROR\n",SNvar(pn->sn)) ;
}
-
// Correction thanks to Nathan D. Holmes
//temp[0] = (_FLOAT) ((int16_t)(data[1]<<8|data[0])) * .5 ; // Main
conversion
// Further correction, using "truncation" thanks to Wim Heirman
On 12/7/06, Darryl VanDorp <[EMAIL PROTECTED]> wrote:
Nope. Both sensors fail.
-darryl
On 12/7/06, Paul Alfille <[EMAIL PROTECTED]> wrote:
> Ok, is it consistent, which fails? powered or unpowered?
>
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