h743开启ICache和DCache遇到相关宏未定义问题

Pedro · 发表于 2020-9-5 12:27:15

ICache和DCache的开启提供的有SCB_EnableICache();SCB_EnableDCache();两个函数：
__STATIC_INLINE void SCB_EnableICache (void)
{
  #if defined (__ICACHE_PRESENT) && (__ICACHE_PRESENT == 1U)
__DSB();
__ISB();
SCB->ICIALLU = 0UL;                   /* invalidate I-Cache */
__DSB();
__ISB();
SCB->CCR |=  (uint32_t)SCB_CCR_IC_Msk;  /* enable I-Cache */
__DSB();
__ISB();
  #endif
}

__ICACHE_PRESENT这个宏在stm32h743xx.h里有定义
#define __CM7_REV             0x0100U /*!< Cortex-M7 revision r1p0                      */
#define __MPU_PRESENT          1    /*!< CM7 provides an MPU                         */
#define __NVIC_PRIO_BITS       4    /*!< CM7 uses 4 Bits for the Priority Levels    */
#define __Vendor_SysTickConfig 0    /*!< Set to 1 if different SysTick Config is used  */
#define __FPU_PRESENT          1    /*!< FPU present                                  */
#define __ICACHE_PRESENT       1    /*!< CM7 instruction cache present                */
#define __DCACHE_PRESENT       1    /*!< CM7 data cache present                      */
#include "core_cm7.h"                   /*!< Cortex-M7 processor and core peripherals    */

但是在编译的时候还是显示未定义__DCACHE_PRESENT是怎么回事啊，想要用到Cache时还必须在mdk5的预定义里加上__DCACHE_PRESENT=1，__ICACHE_PRESENT=1
这点很是费解，求帮助！！！