Interrupt handler

3.6 Interrupt handler

#pragma interrupt/vect and the __interrupt and __interrupt_brk keywords of the CA78K0R are converted into #pragma interrupt/interrupt_brk of the CC-RL.

The format of an interrupt function of the CA78K0R is as follows.

#pragma interrupt(vect) interrupt-request-name function-name function-name [Stack-change-specification] [{Stack-usage-specification | No-change-specification | Register-bank-specification}]

__interrupt void func() { processing }

__interrupt_brk void func() { processing }

The format of an interrupt function of the CC-RL is as follows.

#pragma interrupt [(] function-name [([vect=address][,bank=register-bank][,enable={true|false}])][)]

function-declaration

#pragma interrupt_brk [(] function-name [([bank=register-bank][,enable={true|false}])][)]

function-declaration

-	When the interrupt request name exists, #include "iodefine.h" is output.

-	__interrupt is converted into #pragma interrupt and __interrupt_brk is converted into #pragma interrupt_brk.

-	When the interrupt request name is BRK_I, it is converted into #pragma interrupt_brk.

-	"interrupt-request-name" is converted into "vect=address" as a macro that indicates the address. The macro value is defined by iodefine.h.

-	"Register-bank-specification" is converted into "bank=register-bank".

-	Since "Stack-change-specification", "Stack-usage-specification", and "No-change-specification" do not exist in the CC-RL, the CcnvCA78K0R outputs a message and deletes them.

-	When a macro or typedef is used in declaration or definition of an interrupt function using the __interrupt or __interrupt_brk keyword, the function name may be interpreted erroneously. Perform conversion after expanding the macro or typedef in advance.

If there is a #pragma directive and a description of an interrupt function using a keyword for the same function, converting both of them into #pragma directives sometimes generates duplicate #pragma directives after conversion and a compile error will occur. In this case, delete the duplicate description.

-	When omitting parameters of a function declaration in which the __interrupt or __interrupt_brk keyword is specified, a compile error will occur in the CC-RL. The void type has to be written as the parameter type.

[Examples]

Pattern 1	Before conversion	#pragma vect INTP0 func sp=buff+10 rb1 void func(void) { }
Pattern 1	After conversion	#pragma interrupt func(vect=INTP0, bank=RB1) void func(void) { }
Pattern 2	Before conversion	__interrupt void func(void) { }
Pattern 2	After conversion	#pragma interrupt func void func(void) { }
Pattern 3	Before conversion	#pragma interrupt BRK_I func void func(void) { }
Pattern 3	After conversion	#pragma interrupt_brk func void func(void) { }
Pattern 4	Before conversion	__interrupt void func1(void), func2(void);
Pattern 4	After conversion	#pragma interrupt func1 void func1(void); #pragma interrupt func2 void func2(void);
Pattern 5	Before conversion	#pragma interrupt INTP0 func __interrupt func(void);
	After conversion	#pragma interrupt func(vect=INTP0) void func(void); #pragma interrupt func void func(void);
	Corrective action	Duplicate #pragma directives will cause an error in the CC-RL. Delete one of the #pragma directives.
Pattern 6	Before conversion	typedef void func_t(void); __interrupt func_t f1;
	After conversion	typedef void func_t(void); __interrupt func_t f1;
	Corrective action	A compile error will occur in the CC-RL. Expand typedef or the macro in advance.