[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [avr-gcc-list] assembler expressions

From: Jesper Hansen
Subject: Re: [avr-gcc-list] assembler expressions
Date: Sat, 5 Mar 2005 15:16:49 +0100

No, the c-code like stuff just results in a lot of errors like these :

file1.s:139: Error: missing ')'
file1.s:139: Error: `)' required
file1.s:139: Error: garbage at end of line
file1.s:140: Error: missing ')'
file1.s:140: Error: `)' required
file1.s:140: Error: garbage at end of line
file1.s:141: Error: missing ')'


----- Original Message ----- From: "Ben Mann" <address@hidden>
To: "'Jesper Hansen'" <address@hidden>; <address@hidden>
Sent: Saturday, March 05, 2005 2:32 PM
Subject: RE: [avr-gcc-list] assembler expressions

Why doesn't this work?

#define F_CPU 18432000
#define F1 20000
#define F2 20001
#define LO_F (unsigned long) ( (float) F1 *  F_CPU / (15*16777216) )
#define HI_F (unsigned long) ( (float) F2 *  F_CPU / (15*16777216) )
 ldi  r21,lo8(LO_F)
 ldi  r22,hi8(LO_F)
 ldi  r23,hi8(LO_F)

I have used code like this in the past with no problems.
I don't know what the implications of (float) are though.


Ben Mann

-----Original Message-----
.equ LO_F,  F1 * F_CPU/(15*16777216)
.equ HI_F,  F2 * F_CPU/(15*16777216)

reply via email to

[Prev in Thread] Current Thread [Next in Thread]