學習一下雙內存的使用，

首先MDK工程添加IRAM2，具體地址與大小參考數據手冊

勾選使用MDK鏈接腳本，不用自定義的

修改drv_common.c

增加rt_heap數組用作堆

#define RT_HEAP_SIZE 8192
ALIGN(RT_ALIGN_SIZE)
static uint32_t rt_heap[RT_HEAP_SIZE]; /* 32K V5/V6編譯器*/
//static uint32_t rt_heap[RT_HEAP_SIZE] RT_SECTION(".ARM.__at_0x20008000"); /* 32K V6編譯器*/
//static uint32_t rt_heap[RT_HEAP_SIZE] attribute ((at(0x20008000))); /* 32K V5編譯器*/
修改rt_hw_board_init下的rt_system_heap_init

/*rt_system_heap_init((void *)HEAP_BEGIN, (void )HEAP_END); /
rt_system_heap_init((void *)rt_heap, (void *)(rt_heap+RT_HEAP_SIZE));

最終結果