moo
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bit-band
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bit-band
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vics66@...
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main.cpp
00001 /* 00002 * bit-band test 00003 */ 00004 00005 #include "mbed.h" 00006 00007 DigitalOut led1(LED1); 00008 00009 extern "C" void HardFault_Handler() 00010 { 00011 __nop(); 00012 } 00013 00014 int main() 00015 { 00016 volatile int *a1 = (int*)(0x10000000); // SRAM先頭アドレス 00017 *a1 = 0x1; // Memory windowにて0x1 → 0x0になることを確認した 00018 *a1 = 0x0; 00019 00020 volatile int *a2 = (int*)(0x22000000); // SRAM先頭アドレスをbit-band-aliasで指定 00021 *a2 = 0x1; // Memory windowにて0x10000000を見ても0x1になることを確認出来ない 00022 00023 __nop(); // この行を実行するとHardFault_Handler()に飛ぶ 00024 __nop(); 00025 while (1); 00026 }
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