How do I read more than 1 byte using I2CIN?

Cheetah

I'm interfacing to an ADS1000 chip using the BS2pe and I need to read 2 bytes of data from it.
The ADS1000 data sheet says that all I need to do is address the ads1000 for reading and just
read 2 bytes. I am able to one byte using the following pbasic statement:

I2CIN SDA, RdADS, 0, [noparse][[/noparse]result]

but I don't know how to read 2 bytes. Can someone explain to me how to read more than
one byte using I2CIN?

Thanks.

Cheetah

BTW, in the code snippet above, the variable 'result' is defined as

result  VAR word

Duffer

Give this a try. From the·SERIN (works the same for I2CIN)·help file:

serStr· VAR···· Byte(10)······················· ' Make a 10-byte array

Main:
· serStr(9) = 0·································· ·' Put 0 in last byte
··SERIN 1, 16468, [noparse][[/noparse]STR serStr\9]············' Get 9-byte string
· DEBUG STR serString··························' Display the string
· END



Or in your case:

Define a word variable (2 bytes) and:

I2CIN 1, 16468, [noparse]/noparse]DEC2 [i]varname[/i

Chris Savage

Cheetah,

If the device will send a 16-bit value it will most likely be sent as two bytes. You need to know how the device will send these 2 bytes (in what order, usually HIGHBYTE/LOWBYTE). Once you know that you can do something like.

I2CIN SDA, $A1,EEprom_add.HIGHBYTE\EEprom_add.LOWBYTE,[noparse][[/noparse]value.HIGHBYTE, value.LOWBYTE] 

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support

Cheetah

Thanks guys. I'll try that. For some reason the search function of this board wasn't working today.

Chris Savage

Cheetah, the search function on the Forums does not work well at all. Please see the following thread for a better search engine.

http://forums.parallax.com/showthread.php?p=562370

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Chris Savage
Parallax Tech Support

Cheetah

Thanks again.