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device enumeration works, and it's much faster than under BASIC :-)

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git-svn-id: https://svn.salfter.gotdns.org/svn/a2bfc/trunk@87 1b90f75b-8b96-4784-87c0-14078182fce6
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(no author)
2007-09-24 03:27:51 +00:00
parent 9fd60e453b
commit ecedcaee07
6 changed files with 100 additions and 22 deletions
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25
ow-temp.c
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@@ -6,20 +6,15 @@ short ow_temp_read(unsigned char* devid, unsigned char format)
short rawtemp;
unsigned char i;
if (devid[0]!=40)
if (!ow_temp_idcheck(devid))
return OW_ERR_INVALIDDEVICE;
do
{
ow_selectdevice(devid);
ow_writebyte(68); // ask for a temperature reading
ow_wait(); // wait for operation to complete
ow_selectdevice(devid);
ow_writebyte(190); // retrieve the reading
for (i=0; i<8; i++)
data[i]=ow_readbyte();
ow_mswait();
}
while (ow_crc(data,8)!=0); // repeat until we get a valid reading
ow_selectdevice(devid);
ow_writebyte(68); // ask for a temperature reading
ow_wait(); // wait for operation to complete
ow_selectdevice(devid);
ow_writebyte(190); // retrieve the reading
for (i=0; i<8; i++)
data[i]=ow_readbyte();
rawtemp=(short)(data[0]+((int)data[1]<<8));
switch (format)
@@ -34,3 +29,7 @@ short ow_temp_read(unsigned char* devid, unsigned char format)
}
}
unsigned char ow_temp_idcheck(unsigned char* devid)
{
return (devid[0]==40)?1:0;
}