[原创] TMS570学习2-bootload跳转实验

QQ：971586331

软件环境：

操作系统：windows 10

IDE：CCS7.4

代码生成工具：HALCoGen 04.07.01

烧写工具：CCS UniFlash

硬件环境：

目标板：TMDS570LS31HDK

本文内容：详细描述了TMS570系统处理器bootload跳转原理，编写2份程序，一个是bootload，一个是应用程序，在bootload中，使LED D5(HET1[00])闪烁5次后跳转到0x00180000处开始执行应用程序，应用程序中使LED D4(HET1[31])闪烁5次后软复位，再次执行bootload，如此往复。

1.编写bootload程序

按TMS570学习1中的流程新建工程boot_test，在hal下的sys_main.c中的编写主程序

/* USER CODE BEGIN (0) */
#include "sys_common.h"
#include "gio.h"
#include "delay.h"
#include "het.h"
#include "pinmux.h"
#include "F021.h"
/* USER CODE END */

/* Include Files */

/* USER CODE BEGIN (1) */

#define APP1_START_ADDRESS  (0x00180000)
#define APP2_START_ADDRESS  (0x00040000)
#define APP3_START_ADDRESS  (0x00060000)
#define APP4_START_ADDRESS  (0x00080000)

/* USER CODE END */

/** @fn void main(void)
*   @brief Application main function
*   @note This function is empty by default.
*
*   This function is called after startup.
*   The user can use this function to implement the application.
*/

/* USER CODE BEGIN (2) */

uint32 g_ulTransferAddress;

/* USER CODE END */

uint8	emacAddress[6U] = 	{0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU};
uint32 	emacPhyAddress	=	1U;

int main(void)
{
/* USER CODE BEGIN (3) */

    int i = 0;

    gioInit();
    muxInit();

    /* Set high end timer GIO port hetPort pin direction to all output */
    gioSetDirection(hetPORT1, 0xFFFFFFFF);

    for( i=0; i<10; i++)
    {
        gioSetPort(hetPORT1, gioGetPort(hetPORT1) ^ (1<<0));
        my_delay(1000);
    }

    g_ulTransferAddress = (uint32_t)APP1_START_ADDRESS;
    ((void (*)(void))g_ulTransferAddress)();    //跳转程序指针

    while(1)
    {

    }

/* USER CODE END */

    return 0;
}


/* USER CODE BEGIN (4) */
/* USER CODE END */

在主程序中，我们先初始化IO，让HET1[00]闪烁5次，然后让程序指针跳转到0x00180000处开始运行，因为要下载2个程序，为了把程序下载到指定地址和防止程序地址空间冲突，修改cmd文件。

/*                                                                            */
/*----------------------------------------------------------------------------*/
/* USER CODE BEGIN (0) */
/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Linker Settings                                                            */

--retain="*(.intvecs)"

/* USER CODE BEGIN (1) */
/* USER CODE END */

/*----------------------------------------------------------------------------*/
/* Memory Map                                                                 */

MEMORY
{
    VECTORS (X)  : origin=0x00000000 length=0x00000020
    FLASH0  (RX) : origin=0x00000020 length=0x0017FFE0
    //FLASH1  (RX) : origin=0x00180000 length=0x00180000
    STACKS  (RW) : origin=0x08000000 length=0x00001500
    RAM     (RW) : origin=0x08001500 length=0x0003EB00

/* USER CODE BEGIN (2) */
/* USER CODE END */
}

/* USER CODE BEGIN (3) */
/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Section Configuration                                                      */

SECTIONS
{
    .intvecs : {} > VECTORS
    //.text    : {} > FLASH0 | FLASH1
    //.const   : {} > FLASH0 | FLASH1
    //.cinit   : {} > FLASH0 | FLASH1
    //.pinit   : {} > FLASH0 | FLASH1
    .text    : {} > FLASH0
    .const   : {} > FLASH0
    .cinit   : {} > FLASH0
    .pinit   : {} > FLASH0
    .bss     : {} > RAM
    .data    : {} > RAM
	.sysmem  : {} > RAM
	

/* USER CODE BEGIN (4) */
/* USER CODE END */
}

/* USER CODE BEGIN (5) */
/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Misc                                                                       */

/* USER CODE BEGIN (6) */
/* USER CODE END */
/*----------------------------------------------------------------------------*/

因为bootload程序上电启动，所以从0x00000000开始，FLASH1段的位置正好是我们放应用程序的位置，所以屏蔽掉，SECTIONS中的text等段就只能放在FLASH0中，编译下载，可以看到板上的HET1[00]灯闪烁5次后熄灭，因为0x00180000处没有代码可以执行，程序跑飞。

2.编写应用程序

按TMS570学习1中的流程新建工程test，在hal下的sys_main.c中的编写主程序

/* USER CODE BEGIN (0) */
/* USER CODE END */

/* Include Files */

#include "sys_common.h"

/* USER CODE BEGIN (1) */
#include "rti.h"
#include "het.h"
#include "gio.h"
#include "emif.h"
#include "pinmux.h"
#include "sci.h"
#include "delay.h"
#include <stdio.h>
#include <reg_system.h>
/* USER CODE END */

/** @fn void main(void)
*   @brief Application main function
*   @note This function is empty by default.
*
*   This function is called after startup.
*   The user can use this function to implement the application.
*/

/* USER CODE BEGIN (2) */


/* USER CODE END */

uint8	emacAddress[6U] = 	{0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU, 0xFFU};
uint32 	emacPhyAddress	=	0U;

int main(void)
{
/* USER CODE BEGIN (3) */
    int i=0;
    int ret;
    int buff;

    /* Initialize RTI driver */
    gioInit();
    rtiInit();
    muxInit();
    sciInit();
    sciEnableNotification(sciREG, SCI_RX_INT);

    /* Set high end timer GIO port hetPort pin direction to all output */
    gioSetDirection(hetPORT1, 0xFFFFFFFF);

    /* Enable RTI Compare 0 interrupt notification */
    rtiEnableNotification(rtiNOTIFICATION_COMPARE0);

    /* Enable IRQ - Clear I flag in CPS register */
    /* Note: This is usually done by the OS or in an svc dispatcher */
    _enable_IRQ();

    /* Start RTI Counter Block 0 */
    rtiStartCounter(rtiCOUNTER_BLOCK0);

        //让HET1[31]闪烁5次
    for( i=0; i<10; i++)
    {
        gioSetPort(hetPORT1, gioGetPort(hetPORT1) ^ (1<<31));
        my_delay(1000);
    }
    systemREG1->SYSECR = 0x8000;    //软件复位

    /* Run forever */
    while(1)
    {
        //gioSetPort(hetPORT1, gioGetPort(hetPORT1) ^ (1<<0));

        my_delay(1000);
    }

/* USER CODE END */

    return 0;
}


/* USER CODE BEGIN (4) */
/* Note-You need to remove rtiNotification from notification.c to avoid redefinition */
void rtiNotification(uint32_t notification)
{

/*  enter user code between the USER CODE BEGIN and USER CODE END. */
    /* Toggle HET pin 0 */
    gioSetPort(hetPORT1, gioGetPort(hetPORT1) ^ (1<<17));

}
/* USER CODE END */

在主程序中，先初始化IO，然后让HET1[31]闪烁5次，然后让程序软复位，因为应用程序要放到0x00180000位置，所以要修改cmd文件

/*                                                                            */
/*----------------------------------------------------------------------------*/
/* USER CODE BEGIN (0) */
/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Linker Settings                                                            */

--retain="*(.intvecs)"

/* USER CODE BEGIN (1) */
/* USER CODE END */

/*----------------------------------------------------------------------------*/
/* Memory Map                                                                 */

MEMORY
{
    //VECTORS (X)  : origin=0x00000000 length=0x00000020
    VECTORS (X)  : origin=0x00180000 length=0x00000020
    //FLASH0  (RX) : origin=0x00000020 length=0x0017FFE0
    FLASH1  (RX) : origin=0x00180020 length=0x0001FFE0
    STACKS  (RW) : origin=0x08000000 length=0x00001500
    RAM     (RW) : origin=0x08001500 length=0x0003EB00

/* USER CODE BEGIN (2) */
/* USER CODE END */
}

/* USER CODE BEGIN (3) */
/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Section Configuration                                                      */

SECTIONS
{
    .intvecs : {} > VECTORS
    //.text    : {} > FLASH0 | FLASH1
    //.const   : {} > FLASH0 | FLASH1
    //.cinit   : {} > FLASH0 | FLASH1
    //.pinit   : {} > FLASH0 | FLASH1
    .text    : {} > FLASH1
    .const   : {} > FLASH1
    .cinit   : {} > FLASH1
    .pinit   : {} > FLASH1
    .bss     : {} > RAM
    .data    : {} > RAM
	.sysmem  : {} > RAM
	

/* USER CODE BEGIN (4) */
/* USER CODE END */
}

/* USER CODE BEGIN (5) */
/* USER CODE END */


/*----------------------------------------------------------------------------*/
/* Misc                                                                       */

/* USER CODE BEGIN (6) */
/* USER CODE END */
/*----------------------------------------------------------------------------*/

因为程序要在0x00180000开始，所将起始地址改为0x00180000，屏蔽FLASH0，SECTIONS中的段放在FLASH1中，编译程序，此时不能仿真因为程序不是下载到0地址的

3.烧写引导程序和应用程序

用TI的CCS UniFlash工具一次性烧写引导和应用程序

点Add选择引导和应用程序的out文件，点击Program，按下开发板上的复位键，可以观察到HET1[0]闪烁5次后HET1[31]闪烁5次，然后重复，说明先运行了bootload程序，然后运行了应用程序，应用程序运行完后程序复位，又运行bootload程序。

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有一个地方没看明白，cmd文件中VECTORS段占用了起始的0x20个字节，是作什么用的？

明白了，是异常向量表