测试代码如下：
const uint32_t test_buf=0x30000-0x1000;
uint32_t *p;
printf("Erase...\n");
FLASH_ROM_ERASE(test_buf, 4096);
p=(uint32_t*)test_buf;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("\n");
p=(uint32_t*)test_buf;
printf("write:\n");
p=(uint32_t*)test_buf;
dat=1;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=2;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=4;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=8;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=0x10;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
p=(uint32_t*)test_buf;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("\n");
printf("write2:\n");
p=(uint32_t*)test_buf;
dat=2;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=4;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=8;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=0x10;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
dat=0x20;FLASH_ROM_WRITE((uint32_t)p,&dat,4);p++;
p=(uint32_t*)test_buf;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("%8X,",*p); p++;
printf("\n");
结果打印：
Erase...
F5F9BDA9,F5F9BDA9,F5F9BDA9,F5F9BDA9,F5F9BDA9,F5F9BDA9,F5F9BDA9,F5F9BDA9,
write:
1, 2, 4, 8, 10,F5F9BDA9,F5F9BDA9,F5F9BDA9,
write2:
2, 4, 8, 10, 20,F5F9BDA9,F5F9BDA9,F5F9BDA9,
为什么flash擦除后读取到的不是0xffffffff而是F5F9BDA9 ？烧录EVT的示例代码也是这个结果，反而EEPROM_READ操作可以读到0xFFFFFFFF。
连续两次写入相同地址后，并没有相与的效果，貌似做了擦除后重新写入的，这样每写一个字节就扇区擦除一次是否会缩短寿命？
