RT1020 —— BootLoader 中烧写 APP 到指定位置的方法
前言
本篇博文将介绍如何实现在 BootLoader 中烧写代码数据到 Flash 的指定位置，并跳转到代码位置运行：
正常实现升级的方式是通过各种通信接口如：UART、CAN、USB、Ethernet...，通信接口把需要升级的代码传送给 BootLoader，BootLoader 写代码数据到 Flash 并跳转到代码位置执行。
本篇博文将不使用通信接口获取数据，而是把需要烧录到 Flash 的数据放到 Flash 当中，在 BootLoader 中把 Flash 数据读取到 RAM 当中，通过 FlexSPI 把 RAM 中的数据写到 Flash 的指定位置。
把数组数据放到指定的 Flash 自定义 section 中：
数组定义与声明：
1. 对把数组需要放到的 section 进行 __attribute__ 修饰；
#define LOCATION_EXTFLASH_ATTRIBUTE __attribute__ ((section ("Myapp"))) __attribute__ ((aligned(4)))
const unsigned char _aclwip_ping_bm[0x12880] LOCATION_EXTFLASH_ATTRIBUTE = {
0, 0, 0,
}；2. 修改 scf 文件：
- 自定义 block，定义 block 的起始和结束地址。
- 加载 block 段，在其中声明数据放到的 section 段 *.o(Myapp)。
;Define new block m_text_data, place it at the beginning of the scf file
#define m_text_data_start 0x60030000
#define m_text_data_size 0x00013000
;Place at the end of the scf file, as a new block of m_text_data
LR_m_data_text m_text_data_start m_text_data_size{
ER_m_data_text m_text_data_start FIXED m_text_data_size { ; load address = execution address
*.o(Myapp)
}
}添加 flexspi 操作函数文件到工程中。
在主函数所在文件中添加：
#include "fsl_flexspi.h"
#include "app.h"
#include "fsl_cache.h"/************************************************FlexSPI********************************************************************/
//add FlexSPI Functions
/* Program data buffer should be 4-bytes alignment, which can avoid busfault due to this memory region is configured as
Device Memory by MPU. */
SDK_ALIGN(static uint8_t s_nor_program_buffer[256], 4);
static uint8_t s_nor_read_buffer[256];
extern status_t flexspi_nor_flash_erase_sector(FLEXSPI_Type *base, uint32_t address);
extern status_t flexspi_nor_flash_page_program(FLEXSPI_Type *base, uint32_t dstAddr, const uint32_t *src);
extern status_t flexspi_nor_get_vendor_id(FLEXSPI_Type *base, uint8_t *vendorId);
extern status_t flexspi_nor_enable_quad_mode(FLEXSPI_Type *base);
extern status_t flexspi_nor_erase_chip(FLEXSPI_Type *base);
extern void flexspi_nor_flash_init(FLEXSPI_Type *base);
/*******************************************************************************
* Code
******************************************************************************/
flexspi_device_config_t deviceconfig = {
.flexspiRootClk = 133000000,
.flashSize = FLASH_SIZE,
.CSIntervalUnit = kFLEXSPI_CsIntervalUnit1SckCycle,
.CSInterval = 2,
.CSHoldTime = 3,
.CSSetupTime = 3,
.dataValidTime = 0,
.columnspace = 0,
.enableWordAddress = 0,
.AWRSeqIndex = 0,
.AWRSeqNumber = 0,
.ARDSeqIndex = NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD,
.ARDSeqNumber = 1,
.AHBWriteWaitUnit = kFLEXSPI_AhbWriteWaitUnit2AhbCycle,
.AHBWriteWaitInterval = 0,
};
const uint32_t customLUT[CUSTOM_LUT_LENGTH] = {
/* Normal read mode -SDR */
/* Normal read mode -SDR */
[4 * NOR_CMD_LUT_SEQ_IDX_READ_NORMAL] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x03, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
[4 * NOR_CMD_LUT_SEQ_IDX_READ_NORMAL + 1] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
/* Fast read mode - SDR */
[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x0B, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST + 1] = FLEXSPI_LUT_SEQ(
kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_1PAD, 0x08, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
/* Fast read quad mode - SDR */
[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xEB, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_4PAD, 0x18),
[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD + 1] = FLEXSPI_LUT_SEQ(
kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_4PAD, 0x06, kFLEXSPI_Command_READ_SDR, kFLEXSPI_4PAD, 0x04),
/* Read extend parameters */
[4 * NOR_CMD_LUT_SEQ_IDX_READSTATUS] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x81, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
/* Write Enable */
[4 * NOR_CMD_LUT_SEQ_IDX_WRITEENABLE] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x06, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
/* Erase Sector */
[4 * NOR_CMD_LUT_SEQ_IDX_ERASESECTOR] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x20, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
/* Page Program - single mode */
[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x02, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE + 1] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
/* Page Program - quad mode */
[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x32, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_1PAD, 0x18),
[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_QUAD + 1] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_4PAD, 0x04, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
/* Read ID */
[4 * NOR_CMD_LUT_SEQ_IDX_READID] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x9F, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
/* Enable Quad mode */
[4 * NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x01, kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_1PAD, 0x04),
/* Enter QPI mode */
[4 * NOR_CMD_LUT_SEQ_IDX_ENTERQPI] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x35, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
/* Exit QPI mode */
[4 * NOR_CMD_LUT_SEQ_IDX_EXITQPI] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_4PAD, 0xF5, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
/* Read status register */
[4 * NOR_CMD_LUT_SEQ_IDX_READSTATUSREG] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x05, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD, 0x04),
/* Erase whole chip */
[4 * NOR_CMD_LUT_SEQ_IDX_ERASECHIP] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xC7, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0),
};
/************************************************FlexSPI********************************************************************/
uint8_t flespi_test()
{
/************************************************FlexSPI********************************************************************/
uint32_t i = 0;
status_t status;
uint8_t vendorID = 0;
flexspi_nor_flash_init(EXAMPLE_FLEXSPI);
PRINTF("\r\nFLEXSPI example1 started!\r\n");
/* Get vendor ID. */
status = flexspi_nor_get_vendor_id(EXAMPLE_FLEXSPI, &vendorID);
if (status != kStatus_Success)
{
return status;
}
PRINTF("Vendor ID: 0x%x\r\n", vendorID);
PRINTF("Enter quad mode 1\n");
/* Enter quad mode. */
status = flexspi_nor_enable_quad_mode(EXAMPLE_FLEXSPI);
if (status != kStatus_Success)
{
return status;
}
PRINTF("Enter quad mode 2\n");
for(int i = 0; i<= sizeof(_aclwip_ping_bm)/SECTOR_SIZE; i++)
{
/* Erase sectors. */
PRINTF("Erasing Serial NOR over FlexSPI...\r\n");
status = flexspi_nor_flash_erase_sector(EXAMPLE_FLEXSPI, APP_BASE_ADDRESS + SECTOR_SIZE * i);
if (status != kStatus_Success)
{
PRINTF("Erase sector failure !\r\n");
return -1;
}
}
for(int j = 0; j<= sizeof(_aclwip_ping_bm)/FLASH_PAGE_SIZE; j++)
{
if(j>sizeof(_aclwip_ping_bm)/256-1)
{
memset(s_nor_program_buffer, 0xFFU, sizeof(s_nor_program_buffer));
DCACHE_InvalidateByRange(EXAMPLE_FLEXSPI_AMBA_BASE + APP_BASE_ADDRESS + FLASH_PAGE_SIZE * j, FLASH_PAGE_SIZE);
memcpy(s_nor_program_buffer, &_aclwip_ping_bm[(j)*256], sizeof(_aclwip_ping_bm)%256);
}
else
{
DCACHE_InvalidateByRange(EXAMPLE_FLEXSPI_AMBA_BASE + APP_BASE_ADDRESS + FLASH_PAGE_SIZE * j, FLASH_PAGE_SIZE);
memcpy(s_nor_program_buffer, &_aclwip_ping_bm[(j)*256], sizeof(s_nor_program_buffer));
}
status =
flexspi_nor_flash_page_program(EXAMPLE_FLEXSPI, APP_BASE_ADDRESS + FLASH_PAGE_SIZE*(j), (void *)s_nor_program_buffer);
if (status != kStatus_Success)
{
PRINTF("Page program failure !\r\n");
return -1;
}
}
return 0;
}
/************************************************FlexSPI********************************************************************/
跳转函数代码：
/*******************************************Jump Function********************************************************/
#define APP_ADDR 0x60010000 //APP1 : 0x60010000 APP2 : 0x60030000
typedef void (*pFunc)(void);
volatile uint32_t AppAddr;
volatile uint32_t app_start_address;
pFunc JumpToApp;
void jump_to_application(uint32_t applicationAddress)
{
app_start_address = applicationAddress + 0x00002000;
PRINTF("App Start Address : 0x%x\r\n",app_start_address);
SCB->VTOR = app_start_address;
AppAddr = *(uint32_t*)app_start_address;
PRINTF("App Top of Stack : 0x%x\r\n",AppAddr);
__set_MSP(AppAddr);
AppAddr = *(uint32_t*)(app_start_address + 4);
JumpToApp = (pFunc)AppAddr;
JumpToApp();
}
/*******************************************Jump Function********************************************************/
主函数：
/*!
* @brief Main function
*/
int main(void)
{
char ch;
/* Init board hardware. */
BOARD_ConfigMPU();
BOARD_InitBootPins();
BOARD_InitBootClocks();
BOARD_InitDebugConsole();
/* Just enable the trace clock, leave coresight initialization to IDE debugger */
SystemCoreClockUpdate();
CLOCK_EnableClock(kCLOCK_Trace);
PRINTF("hello world.\r\n");
PRINTF("0x = %x\r\n",_aclwip_ping_bm[0]);
flespi_test();
jump_to_application(APP_ADDR);
while (1)
{
}
}