Initializing DSP System and Control Registers from C and C++ Application Note

About this manual

The document provides methods for initializing system registers in C code. For memory-mapped control registers, it describes dereferencing C pointers to access specific addresses, utilizing include files like defxxxx.h that define register addresses and bit fields.

For non-memory-mapped control registers (such as the MODE2 or IMASK registers), the note details the use of inline assembly and macros provided in sysreg.h. It lists functions for reading, writing, setting, clearing, toggling, and testing bits within these registers.

What's inside

• Memory Mapped Control Registers
• Dereferencing C Pointers
• Include Files (defxxxx.h)
• Non-Memory Mapped Control Registers
• Inline Assembly
• sysreg Functions

Frequently asked questions

How do you write a value to a memory-mapped control register in C?

You dereference a C pointer pointing to the address, for example: * (int *) OxlO = Oxffff;

What functions are available in sysreg.h for non-memory-mapped registers?

The include file provides prototypes such as sysreg_read, sysreg_write, and sysreg_bit_clr.