Texas Instruments C28 Series

Accessing Interrupts / Status Register
Accessing Interrupts / Status Register
Accessing Interrupts / Status Register
Accessing Interrupts / Status Register
Initialize via C :
Initialize via C :
extern
extern
cregister
cregister
volatile unsigned
volatile unsigned
int
int
IFR;
IFR;
extern
extern
cregister
cregister
volatile unsigned
volatile unsigned
int
int
IER;
IER;
. . .
. . .
IER &= ~Mask;
IER &= ~Mask;
//clear desired bits
//clear desired bits
IER |= Mask;
IER |= Mask;
//set desired bits
//set desired bits
IFR = 0x0000;
IFR = 0x0000;
//clear prior interrupts
//clear prior interrupts


Interrupt Enable & Interrupt Flag Registers (IER, IFR) are not
Interrupt Enable & Interrupt Flag Registers (IER, IFR) are not
memory mapped
memory mapped


Only limited instructions can access IER & IFR (more in interrup
Only limited instructions can access IER & IFR (more in interrup
t
t
chapter)
chapter)


The compiler provides extern variables for accessing the IER & I
The compiler provides extern variables for accessing the IER & I
FR
FR
D- 6 C28x – C Programming