diff options
Diffstat (limited to 'src/avr/pgm.h')
| -rw-r--r-- | src/avr/pgm.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/avr/pgm.h b/src/avr/pgm.h new file mode 100644 index 000000000..ba68d8f9c --- /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 <avr/pgmspace.h> + +#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 |