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SPIOUT

Syntax​

SPIOUT CSpin, outpin, clockpin, [OutputList] OutputList  =  expr | arrayname \ count | stringname$ {\count} | "string"   { , OutputList}

Description​

SPIOUT supports the loosely defined serial protocol used by a variety of manufacturers.  The desired device is selected by asserting CSpin LOW.  If there is no cspin, the value should be set to -1.

In the simplest case, outpin is used to output data clocked by clockpin, from the OutputList.

[OutputList] can contain a list of constants, variables, "constant-string" or stringame$   The latter will send out bytes starting from stringname$(0) until a 0 byte is read.

Data is shifted out LSB first and each element of the OutputList is treated as a byte. The REV operator can be used to change the bit order. Data is shifted out at 1.4 Mbits/sec. (version 6.07 and before this was 800 Kbits/sec)

Example​

SPIOUT
4,1,2,[$04,GAIN]
' set the GAIN register of an ADS7870

SPIIN 4,3,2,1,$44,[GAIN}
       ' read the GAIN register back

Differences from other BASICs​

  • no equivalent in  Visual BASIC
  • no equivalent in PBASIC

See also​