[導讀]GCCAVR中讀取Flash區(qū)數(shù)據(jù)定義（只能為全局變量）：const int temp PROGMEM = 1;讀取：pgm_read_byte(addr);pgm_read_word(addr);pgm_read_dword(addr);字符串：全局定義：const char ss[]PROGMEM = "hello";函數(shù)內定
GCCAVR中讀取Flash區(qū)數(shù)據(jù)
定義（只能為全局變量）：
const int temp PROGMEM = 1;
讀取：
pgm_read_byte(addr);
pgm_read_word(addr);
pgm_read_dword(addr);
字符串：
全局定義：
const char ss[]PROGMEM = "hello";
函數(shù)內定義：
const char *ss = PSTR("hello");
讀取同上
注意包含：#include
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