Balogh at 10:33, 6 August 2009

2009-08-06T10:33:29Z

Balogh: New page: ' SHIFTIN.BS2 ' This program uses the SHIFTIN instruction to interface with the ADC0831 ' 8-bit analog-to-digital converter from National Semiconductor. ' {$STAMP BS...

2009-08-06T10:16:46Z

New page: <source lang="basic"> ' SHIFTIN.BS2 ' This program uses the SHIFTIN instruction to interface with the ADC0831 ' 8-bit analog-to-digital converter from National Semiconductor. ' {$STAMP BS...

New page

<source lang="basic">
' SHIFTIN.BS2
' This program uses the SHIFTIN instruction to interface with the ADC0831
' 8-bit analog-to-digital converter from National Semiconductor.

' {$STAMP BS2}
' {$PBASIC 2.5}

CS PIN 0 ' chip select
AData PIN 1 ' data pin
Clk PIN 2 ' clock pin

adcRes VAR Byte ' ADC result

Setup:
HIGH CS ' deselect ADC

' In the loop below, just three lines of code are required to read the
' ADC0831. The SHIFTIN command does most of the work. The mode argument in
' the SHIFTIN command specifies MSB or LSB-first and whether to sample data
' before or after the clock. In this case, we chose MSB-first, post-clock.
' The ADC0831 precedes its data output with a dummy bit, which we take care
' of by specifying 9 bits of data instead of 8.

Main:
DO
LOW CS ' activate the ADC0831
SHIFTIN AData, Clk, MSBPOST, [adcRes\9] ' shift in the data
HIGH CS ' deactivate ADC0831
DEBUG ? adcRes ' show conversion result
PAUSE 1000 ' wait one second
LOOP ' repeat
END

</source>

@@ Line 1: / Line 1: @@
 <source lang="basic">
 ' SHIFTIN.BS2
@@ Line 7: / Line 9: @@
 ' {$PBASIC 2.5}
-CS              PIN     0                       ' chip select
+CS              PIN     9                       ' chip select
-AData           PIN     1                       ' data pin
+AData           PIN     10                       ' data pin
-Clk             PIN     2                       ' clock pin
+Clk             PIN     11                      ' clock pin
 adcRes          VAR     Byte                    ' ADC result
@@ Line 33: / Line 35: @@
    LOOP                                          ' repeat
    END
 </source>

SHIFTIN.BS2 - Revision history

Balogh at 10:33, 6 August 2009

Balogh: New page: ' SHIFTIN.BS2 ' This program uses the SHIFTIN instruction to interface with the ADC0831 ' 8-bit analog-to-digital converter from National Semiconductor. ' {$STAMP BS...