SHIFTOUT
 
Syntax


#include <SHIFT.bas>                    ' source in /Program Files/Coridium/BASIClib

SUB SHIFTOUT (OUTpin, CLKpin, LSBfirst, cnt) 

Description

SHIFTOUT can be used for devices that are not covered by SPI, I2C or 1-Wire.  Data is shifted out on OUTpin, and a positive clock is sent on CLKpin for each bit.

While most other hardware functions use bytes, SHIFTOUT is oriented for bit control.  The shiftCounts of each shiftValues defines the number of bits that will be shifted out (1 - 32).  If shiftCounts is 0, it is assumed to be 8.

NOTE***  these shift modes are compatable with SHIFTIN, BUT not the same as PBASIC

Data is shifted out of the device at 300 Kbits/sec.


Example

#include <SHIFT.bas>
#include <SPI.bas>
...

DIM inlist(20) as string
DIM outlist(20) as string

'  mixed SPI, SHIFT example for a 93LC46 connected to pins 11-14

high 14                              ' CS to 93LC46
shiftValues(0) = $260
shiftCounts(0) = 10
SHIFTOUT(12,13,0,1)                 '  write enable  
low 14

shiftValues(0) = $280                 ' count still 10
outlist(0) = $41
high 14
SHIFTOUT(12,13,0,1)                 ' set write to address 0
SPIOUT (-1, 13, 12, 0, 1, outlist) ' send a byte of data
low 14

wait(20)                                     ' allow for write time

high 14
shiftValues(0) = $300
SHIFTOUT(12,13,0,1)                 '   read addr 0
SPIIN (-1, 11, 13, 12, 0, -1, "", 10, inlist) ' read 10 bytes of data
low 14


Differences from other BASICs

See also