From f582a36e4df16d5709943f7df17a900c8bcc12ab Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Wed, 25 May 2016 11:37:40 -0400 Subject: Initial commit of source code. Signed-off-by: Kevin O'Connor --- src/avr/pgm.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 src/avr/pgm.h (limited to 'src/avr/pgm.h') diff --git a/src/avr/pgm.h b/src/avr/pgm.h new file mode 100644 index 00000000..ba68d8f9 --- /dev/null +++ b/src/avr/pgm.h @@ -0,0 +1,25 @@ +#ifndef __AVR_PGM_H +#define __AVR_PGM_H +// This header provides the avr/pgmspace.h definitions for "PROGMEM" +// on AVR platforms. + +#include + +#define READP(VAR) ({ \ + _Pragma("GCC diagnostic push"); \ + _Pragma("GCC diagnostic ignored \"-Wint-to-pointer-cast\""); \ + typeof(VAR) __val = \ + __builtin_choose_expr(sizeof(VAR) == 1, \ + (typeof(VAR))pgm_read_byte(&(VAR)), \ + __builtin_choose_expr(sizeof(VAR) == 2, \ + (typeof(VAR))pgm_read_word(&(VAR)), \ + __builtin_choose_expr(sizeof(VAR) == 4, \ + (typeof(VAR))pgm_read_dword(&(VAR)), \ + __force_link_error__unknown_type))); \ + _Pragma("GCC diagnostic pop"); \ + __val; \ + }) + +extern void __force_link_error__unknown_type(void); + +#endif // pgm.h -- cgit v1.2.3-70-g09d2