CALIBRE
| (See Appendix A for details status codes). |
Example Usage: | (see also sample programs) |
' This will read a byte of data from a slave previously addressed by and with acknowledge already ' disabled by sendaddress. After reading the data, acknowledge will be
Sub Main |
|
setnack% = 0 | ' Enable Acknowledge - only one byte is to be read |
| ' (see parameter descriptions) |
i2cdata% = readbyte(setnack%)
if i2cdata and &H8000 = &H8000 then
print "Data read fault i2c status " + Hex$(i2cdata%)
else
print "Data read was " + Hex$(i2cdata%)
end if
Exit Sub
4.3.5.Write Data Byte to Slave Routine
Function definition: | writebyte%(i2cdata as integer) |
Usage: | i2cstatus% = writebyte(i2cdata%) |
Function: | procedure to write a byte of data to a slave device whose slave address has |
| already been sent by sendaddress. |
Parameters are:
Value Returned:
I2C status on exit:
i2cdata%
The byte of data which is to be written to the slave device.
The value returned depends on whether the data was written successfully. If the data was written then the status is returned.
If the data cannot be written then the last status read IORed with &H8000 will be returned.
The function will read the status a number of times before returning an error condition - this number is defined by the MAXNUMBEROFGOES constant defined in I2CINC.BAS, this value may be altered to suit your system.
&H00 bus busy and data transmitted and acknowledged successfully. &H08 bus busy and data transmitted successfully but not acknowledged . &H80 bus busy and data not transmitted
(See Appendix A for details of Status codes).
Issue 1.3 | Page 17 |
22/07/99