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dmcc

put **kw back in, they now go to the scale and can override the defaults.
put **kw back in, they now go to the scale and can override the defaults.
for our purposes, we probably want to edit the defaults so we don't have
them in every call.

%module serport

%{
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <unistd.h>
%}


%typemap(python,in) __u8 {
  if( !PyInt_Check($input)) {
    PyErr_SetString(PyExc_TypeError,"not an integer");
    return NULL;
  }
  $1 = ($type) PyInt_AsLong($input);
}

%typemap(python,out) __s32 {
  $result = Py_BuildValue("i", ($type) $1);
}

%inline %{

  __s32 i2c_smbus_write_byte(int file, __u8 value);
  __s32 i2c_smbus_read_byte(int file);

  PyObject *read_all_adc(int file) {
    PyObject *t=PyTuple_New(4);
    
    #define CHAN_TO_TUPLE_POS(chan,idx) i2c_smbus_write_byte(file, chan);\
    PyTuple_SetItem(t,idx,PyInt_FromLong(i2c_smbus_read_byte(file)));

    /*
      these are shuffled here to match the way the pots read in. in
      the returned tuple, 0=left pot..3=right pot.
    */
    CHAN_TO_TUPLE_POS(1,0)
    CHAN_TO_TUPLE_POS(2,1)
    CHAN_TO_TUPLE_POS(3,2)
    CHAN_TO_TUPLE_POS(0,3)
      
    return t;

  }

%}