URL:
<http://savannah.nongnu.org/bugs/?39008>
Summary: Progmem macros do not work for TINY architecture
devices
Project: AVR C Runtime Library
Submitted by: saaadhu
Submitted on: Thu 16 May 2013 12:39:58 PM GMT
Category: Library
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Header files
Status: None
Percent Complete: 0%
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 1.8.0
Fixed Release: None
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Details:
The macros in pgmspace.h do not work for TINY devices (attiny10/20/40 etc.),
as they do not have any variant of the LPM instruction.
Instead, flash memory is mapped to data memory space at a certain offset, and
normal data memory load instructions can be used to read from flash.
The attached patch customizes the __LPM series of macros for __AVR_TINY__,
reimplementing them using plain LD, with the memory offset coming from a macro
(__AVR_TINY_PM_BASE_ADDRESS__) defined by the compiler.
Changelog
2013-05-16 Pitchumani Sivanupandi <[email protected]>
* include/avr/pgmspace.h: Customize and reimplement __LPM
macros for tiny architecture.
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File Attachments:
-------------------------------------------------------
Date: Thu 16 May 2013 12:39:58 PM GMT Name: lpm_tiny.patch Size: 4kB By:
saaadhu
<http://savannah.nongnu.org/bugs/download.php?file_id=28096>
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