Akinori Hashimoto / MCP4922

MCP4922 Lib

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MCP4922 Class Reference
Public Member Functions

MCP4922 Class Reference

12bit Resolution. More...

#include <MCP4922.h>

Public Member Functions

 MCP4922 (PinName mosi, PinName sck, PinName _cs, PinName _latch)
 Constructor;.
 MCP4922 (SPI &_spi, PinName _cs, PinName _latch)
 Constructor;.
 MCP4922 (PinName mosi, PinName sck, PinName _cs)
 Constructor;.
 MCP4922 (SPI &_spi, PinName _cs)
 Constructor;.
MCP4922::ERR init (int hz=20000000, int gainA=1, int gainB=1, bool bufA=false, bool bufB=false)
 ESENTIAL FUNC.
void setVal (int valA, int valB)
 Set Value.
void setVal (float valA, float valB)
 Set Value.
void setVal (CH ch, int val)
 Set Value.
void setVal (CH ch, float val)
 Set Value.
void write ()
 Write ALL with update-output(latch off).
void write (CH ch, bool latch=true)
 Write.
void update ()
 Update.

Detailed Description

12bit Resolution.

Dual-channel and Rail-to-Rail Output. SPI Interface with 20MHz. Latching Dual output with LDAC. Seting time of 4.5us. Selectable 1x or 2x Gain. Vdd supplied 2.7 to 5.5V, Vref < Vdd. LDAC setup time: 40ns, pulse: 100ns. 

 

Definition at line 19 of file MCP4922.h.


Constructor & Destructor Documentation






      

        

          MCP4922 
          (
          PinName 
           mosi, 
        

        

          
          
          PinName 
           sck, 
        

        

          
          
          PinName 
           _cs, 
        

        

          
          
          PinName 
           _latch 
        

        

          
          )
          
        

      







Constructor;. 


Parameters:

  

    
mosi,sck,cs,latch

  

  





Definition at line 5 of file MCP4922.cpp.











      

        

          MCP4922 
          (
          SPI & 
           _spi, 
        

        

          
          
          PinName 
           _cs, 
        

        

          
          
          PinName 
           _latch 
        

        

          
          )
          
        

      







Constructor;. 


Parameters:

  

    
spi'sptr, cs, latch 

  

  





Definition at line 10 of file MCP4922.cpp.











      

        

          MCP4922 
          (
          PinName 
           mosi, 
        

        

          
          
          PinName 
           sck, 
        

        

          
          
          PinName 
           _cs 
        

        

          
          )
          
        

      







Constructor;. 


Parameters:

  

    
mosi,sck,cs

  

  





Definition at line 16 of file MCP4922.cpp.











      

        

          MCP4922 
          (
          SPI & 
           _spi, 
        

        

          
          
          PinName 
           _cs 
        

        

          
          )
          
        

      







Constructor;. 


Parameters:

  

    
spi'sptr, cs 

  

  





Definition at line 21 of file MCP4922.cpp.







Member Function Documentation






      

        

          MCP4922::ERR init 
          (
          int 
           hz = 20000000, 
        

        

          
          
          int 
           gainA = 1, 
        

        

          
          
          int 
           gainB = 1, 
        

        

          
          
          bool 
           bufA = false, 
        

        

          
          
          bool 
           bufB = false 
        

        

          
          )
          
        

      







ESENTIAL FUNC. 


; Initialize Configlation.


Parameters:

  

    
hz;freq. of SPI. 

    
gainA/B;output gain select 1x|2x. Vref*gain. 

    
bufA/B;Normally off(false); Buffered= true; 

  

  





Definition at line 33 of file MCP4922.cpp.











      

        

          void setVal 
          (
          int 
           valA, 
        

        

          
          
          int 
           valB 
        

        

          
          )
          
        

      







Set Value. 


Parameters:

  

    
A,B;0-4095 (12bit) 

  

  





Definition at line 68 of file MCP4922.cpp.











      

        

          void setVal 
          (
          CH 
           ch, 
        

        

          
          
          int 
           val 
        

        

          
          )
          
        

      







Set Value. 


Parameters:

  

    
val;0-4095 (12bit) 

  

  





Definition at line 84 of file MCP4922.cpp.











      

        

          void setVal 
          (
          CH 
           ch, 
        

        

          
          
          float 
           val 
        

        

          
          )
          
        

      







Set Value. 


Parameters:

  

    
val;0.0f-1.0f (12bit) 

  

  





Definition at line 104 of file MCP4922.cpp.











      

        

          void setVal 
          (
          float 
           valA, 
        

        

          
          
          float 
           valB 
        

        

          
          )
          
        

      







Set Value. 


Parameters:

  

    
A,B;0.0f-1.0f (12bit) 

  

  





Definition at line 76 of file MCP4922.cpp.











      

        

          void update 
          (
           )
          
        

      







Update. 



Definition at line 149 of file MCP4922.cpp.











      

        

          void write 
          (
          CH 
           ch, 
        

        

          
          
          bool 
           latch = true 
        

        

          
          )
          
        

      







Write. 



Definition at line 125 of file MCP4922.cpp.











      

        

          void write 
          (
           )
          
        

      







Write ALL with update-output(latch off). 



Definition at line 117 of file MCP4922.cpp.









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