请问工程选择RAM还是FLASH，区别在哪里

选择RAM的程序，就是只把代码下载到RAM跑，这样调试的时候速度快，但是程序并没有真正下载。进入FLASH模式就是会把程序下载到FLASH，那就可以离线standalone跑。
从程序上看，主要区别是CMD文件的memorymap的区别和是否有memorycoy函数来初始化FLASH，进入FLASH模式后，main函数的InitSysCtrl(）里面会多出来
#ifdef _FLASH
// Copy time critical code and Flash setup code to RAM
// This includes the following functions: InitFlash();
// The RamfuncsLoadStart, RamfuncsLoadSize, and RamfuncsRunStart
// symbols are created by the linker. Refer to the device .cmd file.
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
// Call Flash Initialization to setup flash waitstates
// This function must reside in RAM
InitFlash_Bank0();
#endif
并且CMD文件会多出:
/* Flash sectors */
FLASHA : origin = 0x080002, length = 0x001FFE /* on-chip Flash */
FLASHB : origin = 0x082000, length = 0x002000 /* on-chip Flash */
FLASHC : origin = 0x084000, length = 0x002000 /* on-chip Flash */
FLASHD : origin = 0x086000, length = 0x002000 /* on-chip Flash */
FLASHE : origin = 0x088000, length = 0x008000 /* on-chip Flash */
FLASHF : origin = 0x090000, length = 0x008000 /* on-chip Flash */
FLASHG : origin = 0x098000, length = 0x008000 /* on-chip Flash */
FLASHH : origin = 0x0A0000, length = 0x008000 /* on-chip Flash */
// FLASHI : origin = 0x0A8000, length = 0x008000 /* on-chip Flash */
FLASHI : origin = 0x0A9E20, length = 0x0061E0 /* on-chip Flash */
FLASHJ : origin = 0x0B0000, length = 0x008000 /* on-chip Flash */
FLASHK : origin = 0x0B8000, length = 0x002000 /* on-chip Flash */
FLASHL : origin = 0x0BA000, length = 0x002000 /* on-chip Flash */
FLASHM : origin = 0x0BC000, length = 0x002000 /* on-chip Flash */
FLASHN : origin = 0x0BE000, length = 0x002000 /* on-chip Flash */