Echelon Neuron - Manual (Page 6)

Implicit ................................................................................................... 31
Pointer Direct......................................................................................... 31
Indirect Relative .................................................................................... 31
Indirect Indexed ..................................................................................... 32
DSP Relative .......................................................................................... 32
BP Relative ............................................................................................ 33
BP Indexed ............................................................................................. 33
Indirect ................................................................................................... 33
Relative .................................................................................................. 33
Writing a Neuron Assembly Utility Function .......................................... 35
Overview of Stack-Oriented Programming ................................................ 36
Designing a Neuron Assembly Function .................................................... 37
Interrupt Tasks with Assembly Code ......................................................... 39
Documenting Changes to the Stack ............................................................ 40
Stack-Effect Comments ......................................................................... 41
Multi-Byte Values ........................................................................... 41
Pointer Values ................................................................................. 41
Conditional Values .......................................................................... 41
Showing the Return Stack .............................................................. 42
Stack-Transformation Comments ........................................................ 42
Integrating the Program .............................................................................. 42
Assembling the Program ............................................................................. 43
Linking the Program .................................................................................... 44
Debugging the Program ............................................................................... 44
Interfacing with a Neuron C Application ................................................. 47
Overview ....................................................................................................... 48
Naming Conventions.................................................................................... 48
Function Parameters ................................................................................... 48
Calling Conventions ..................................................................................... 49
Data Representation .................................................................................... 51
Integers, Characters, and Strings ........................................................ 51
Multi-Byte Values .................................................................................. 51
Arrays ..................................................................................................... 52
Structures and Unions .......................................................................... 52
Bitfields .................................................................................................. 52
Calling a Neuron C Function from Assembly Code ................................... 52
Exploring an Example Function in Neuron Assembly .......................... 55
Overview of the Checksum Example .......................................................... 56
Implementing the Checksum Function ...................................................... 56
Including the Assembly Function in a Neuron C Application .................. 57
Neuron Assembly Language Instruction Statements ............................ 59
Overview of the Assembly Language Instructions .................................... 60
ADC (Add with Carry) ................................................................................. 64
ADD (Add) .................................................................................................... 65
ADD_R (Add and Return) ............................................................................ 66
ALLOC (Allocate) ......................................................................................... 67
AND (And) .................................................................................................... 68
AND_R (And and Return)............................................................................ 69
BR (Branch) .................................................................................................. 70
BRC (Branch If Carry) ................................................................................. 71
BRF (Branch Far) ........................................................................................ 72
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