stm32wle5 双SRAM使用

发布于 2023-01-31 10:22:39 浏览：631 订阅该版

> [易智联Lora评估板bsp地址](https://github.com/RT-Thread/rt-thread/tree/master/bsp/stm32/stm32wle5-yizhilian-lm401)

学习一下双内存的使用，
首先MDK工程添加IRAM2，具体地址与大小参考数据手册

![screenshot_datasheet.png](https://oss-club.rt-thread.org/uploads/20230131/7f9bc40c0167ef659610aa6928728f09.png.webp)

![screenshot_IRAM2.png](https://oss-club.rt-thread.org/uploads/20230131/72235177b82767d83b3d0abab6bbdb02.png.webp)
勾选使用MDK链接脚本，不用自定义的

![screenshot_链接脚本.png](https://oss-club.rt-thread.org/uploads/20230131/12702b01c547387414c485b24d815665.png.webp)
修改drv_common.c
增加rt_heap数组用作堆
```c
#define RT_HEAP_SIZE 8192
ALIGN(RT_ALIGN_SIZE)
static uint32_t rt_heap[RT_HEAP_SIZE]; /* 32K V5/V6编译器*/
//static uint32_t rt_heap[RT_HEAP_SIZE] RT_SECTION(".ARM.__at_0x20008000"); /* 32K V6编译器*/
//static uint32_t rt_heap[RT_HEAP_SIZE] __attribute__((at(0x20008000))); /* 32K V5编译器*/
```
修改rt_hw_board_init下的rt_system_heap_init
```c
/*rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);*/
rt_system_heap_init((void *)rt_heap, (void *)(rt_heap+RT_HEAP_SIZE));
```
最终结果

![screenshot_结果.png](https://oss-club.rt-thread.org/uploads/20230131/bce792441ae3b965783714ab40887a31.png)