S32K312 ITCM代码使用示例

news2024/11/29 10:38:56

在上一篇文章中，介绍了S32K312 DTCM在代码中使用示例，具体可以参考配置文件的编辑，本文主要介绍ITCM的代码使用和调试。ITCM是将功能代码放到了高速缓存中，一方面频繁调用的函数可以快速访问，提高效率；另一方面比如操作S32K312的FLASH代码区的时候，可以实现擦除和写入。

测试代码如下：

/* Including necessary configuration files. */
#include "Mcal.h"

volatile int exit_code = 0;
/* User includes */

void TestDelay(uint32 delay);
void __attribute__ ((section(".itcm0_code"))) Test_function_in_ITCM(void);


void TestDelay(uint32 delay)
{
    static volatile uint32 DelayTimer = 0;
    while(DelayTimer<delay)
    {
        DelayTimer++;
    }
    DelayTimer=0;
}

void __attribute__ ((section(".itcm0_code"))) Test_function_in_ITCM(void)
{
	TestDelay(4800000);
}

uint32_t __attribute__ ((section(".dtcm0_data"))) myDtcm0Data[1024] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
uint32_t __attribute__ ((section(".dtcm0_data"))) myDtcm0Data1[1024] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

void local_func(void)
{
	uint8_t tmp = 0;
	for(tmp = 0; tmp < 10; tmp++)
	{
		(void)tmp;
	}
}

/*!
  \brief The main function for the project.
  \details The startup initialization sequence is the following:
 * - startup asm routine
 * - main()
*/
int main(void)
{
    /* Write your code here */
	uint8 count = 0U;
	for(count = 0; count < 10; count++)
	{
		Test_function_in_ITCM();
		local_func();
		myDtcm0Data[count] = myDtcm0Data1[count] + 10;
	}
    for(;;)
    {
        if(exit_code != 0)
        {
            break;
        }
    }
    return exit_code;
}

验证Test_function_in_ITCM()这个方法，是运行在ITCM区中，debug查看函数方法的地址，