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Re: [avr-gcc-list] assembler expressions
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From: |
Jeff Epler |
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Subject: |
Re: [avr-gcc-list] assembler expressions |
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Date: |
Sun, 6 Mar 2005 08:40:28 -0600 |
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User-agent: |
Mutt/1.4.2i |
You could have "make" compute the value using a shell command, like the
arbitrary-precision calculator "bc":
#------------------------------------------------------------------------
# Makefile
F1 := 1000000
F_CPU := 12000000
LO_F := $(shell echo "$(F1)*$(F_CPU)/(15*16777216)" | bc)
all:
@echo as ... -DLO_F=$(LO_F) ...
.PHONY: all
#------------------------------------------------------------------------
$ make
as ... -DLO_F=47683 ...
bc has been installed on most unix systems I remember using.
Jeff
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