1、基本问题

1.1、J-Link Failed to get CPU status after 4 retries Retry

1.2、CMU_ClockEnable(cmuClock_CORELE, true);

1.3、焊接了好几块板子，Jlink都连不上单片机，最后是把电源的旁路电容都加上才能连上。EFM32单片机对电源的要求较高，必须在芯片的电源上做好滤波和退耦，否则会影响j-link的连接和调试

1.4 EFM32 如果用LEUART，不要使用内部低频晶振做输入，偏频较大

1.5 void LEUART_Tx(LEUART_TypeDef *leuart, uint8_t data) 这个接口在多次发送会出现死循环的情况。所以还是换用

void LEUART_TxExt(LEUART_TypeDef *leuart, uint16_t data)

2、串口升级

2.1工具

Tera Term

J-FLASH

2.2 代码

/*********************************************
* @文件: main.c
* @作者: cjx
* @版本: v1.0.0
* @时间: 2018-06-22
* @电话: 18770053277
* @概要:*********************************************/
#include "apll.h"
#include "ioctrl.h"
#include "xmodem.h"#define UPDATE_COMMAND_WAIT_TIME   5000
#define UPDATE_WAIT_TIME        10000int main(void)
{   T_U32 u32StartTime, u32StopTime;S_FlashInfo stFlashInfo;S_FlashRead stFlashRead;S_FlashWrite stFlashWrite;S_FlashErase stFlashErase;DRIVER_SYS_Open();DRIVER_FLASH_Open();DRIVER_UART_Open();stFlashRead.u32Addr = FLASH_INFO_ADDR;stFlashRead.pu8Data = (T_U8 *)&stFlashInfo;stFlashRead.u32Len = sizeof(stFlashInfo);DRIVER_FLASH_Ioctl(E_FLASH_IOCTL_CMD_READ, &stFlashRead);if(stFlashInfo.u32Ver > 0xff){    //stFlashInfo.u32Ver = 0;stFlashInfo.u32AppAddr = FLASH_APP1_ADDR;stFlashInfo.u32UpdateAddr = FLASH_APP1_ADDR;}DRIVER_UART_Write("Please Input Command!\r\n", sizeof("Please Input Command!\r\n")-1);DRIVER_SYS_Ioctl(E_SYS_IOCTL_CMD_GET_TIME, &u32StartTime);while(1){unsigned char c = 0;c = 0;xgetc_nowait(&c);switch(c){case 'U': case 'u': // Upload.{stFlashErase.u32Addr = stFlashInfo.u32UpdateAddr;stFlashErase.u32Pages = FLASH_APP_PAGES;        if(RET_FAILED==DRIVER_FLASH_Ioctl(E_FLASH_IOCTL_CMD_ERASE, &stFlashErase)){goto error;}DRIVER_UART_Write("Please Update!\r\n", sizeof("Please Update!\r\n")-1);if(1 == xmodem(stFlashInfo.u32UpdateAddr, stFlashInfo.u32UpdateAddr+FLASH_APP_PAGES*FLASH_PAGE_SIZE)){stFlashInfo.u32Ver = (stFlashInfo.u32Ver+1)%256;if(FLASH_APP1_ADDR == stFlashInfo.u32UpdateAddr){stFlashInfo.u32AppAddr = FLASH_APP1_ADDR;stFlashInfo.u32UpdateAddr = FLASH_APP2_ADDR;}else{stFlashInfo.u32AppAddr = FLASH_APP2_ADDR;stFlashInfo.u32UpdateAddr = FLASH_APP1_ADDR;}stFlashWrite.u32Addr = FLASH_INFO_ADDR;stFlashWrite.pu8Data = (T_U8 *)&stFlashInfo;stFlashWrite.u32Len = sizeof(stFlashInfo);stFlashErase.u32Addr = FLASH_INFO_ADDR;stFlashErase.u32Pages = FLASH_INFO_PAGES;DRIVER_FLASH_Ioctl(E_FLASH_IOCTL_CMD_ERASE, &stFlashErase);DRIVER_FLASH_Ioctl(E_FLASH_IOCTL_CMD_WRITE, &stFlashWrite);DRIVER_UART_Write("Update Success!\r\n", sizeof("Update Success!\r\n")-1);}else{goto error;}goto end;
#if 0               while(1){if(xgetc(&c)){u32StartTime = u32StopTime;}DRIVER_SYS_Ioctl(E_SYS_IOCTL_CMD_GET_TIME, &u32StopTime);if((u32StopTime-u32StartTime) > UPDATE_WAIT_TIME){goto end;}}
#endif                }break;
#if 0case 'T': case 't': // Write to user page.//xmodem(USER_PAGE_START_ADDR, USER_PAGE_END_ADDR);break;case 'P': case 'p': // Write to lock bits.//xmodem(LOCK_PAGE_START_ADDR, LOCK_PAGE_END_ADDR);break;
#endifcase 'B': case 'b': // Boot into new program.goto end;break;default:break;}DRIVER_SYS_Ioctl(E_SYS_IOCTL_CMD_GET_TIME, &u32StopTime);if((u32StopTime-u32StartTime) > UPDATE_COMMAND_WAIT_TIME){goto end;}}end:if(stFlashInfo.u32Ver > 0xff){DRIVER_UART_Write("Don't Have App!\r\n", sizeof("Don't Have App!\r\n")-1);DRIVER_SYS_Halt();}else{DRIVER_UART_Write("Into App!\r\n", sizeof("Into App!\r\n")-1);T_S8 s8StartAddr[] = "Start Addr = 0x00000000\r\n";T_U8 u8i=0,u8hex;T_S8 s8Addr[4];T_U32 u32Addr = stFlashInfo.u32AppAddr;for(u8i=0; u8i<4; u8i++){u8hex = u32Addr;u8hex %= 16;if(u8hex > 9){s8Addr[u8i] = u8hex - 10+ 'a';}else{s8Addr[u8i] = u8hex + '0';}u32Addr >>= 4;}s8StartAddr[19] = s8Addr[3];s8StartAddr[20]    = s8Addr[2];s8StartAddr[21]    = s8Addr[1];s8StartAddr[22]    = s8Addr[0];DRIVER_UART_Write(s8StartAddr, 25);typedef  unsigned int (*ENTRY_FUNC_TYPE)(void);ENTRY_FUNC_TYPE Goto;Goto = (ENTRY_FUNC_TYPE)(*(unsigned int *)(stFlashInfo.u32AppAddr+4));__set_MSP(*(unsigned int*)stFlashInfo.u32AppAddr);Goto();while(1);}error:   DRIVER_UART_Write("Update Fail!\r\n", sizeof("Update Fail!\r\n")-1);SCB->AIRCR = 0x05FA0004;while(1);
}

/*********************************************
* @文件: driverFlash.c
* @作者: cjx
* @版本: v1.0.1
* @时间: 2018-11-09
* @概要: Flash驱动
*********************************************/
#include "baseType.h"
#include "ioctrl.h"/*********************************************功能：打开函数*输入：无*输出：无*条件：无*返回：成功:RET_SUCCESS 失败:RET_FAILED 注意:
*********************************************/
T_S32 DRIVER_FLASH_Open(T_VOID)
{MSC_Init();
#if 0// Write MSC unlock code to enable interface.MSC->LOCK = MSC_UNLOCK_CODE;#if defined(EMU_CMD_EM01VSCALE2)// Scale voltage up to allow FLASH programmingEMU->CMD = EMU_CMD_EM01VSCALE2;while (EMU->STATUS & EMU_STATUS_VSCALEBUSY);
#endif// Enable memory controller.MSC->WRITECTRL |= MSC_WRITECTRL_WREN;
#endif  return RET_SUCCESS;
}
/*********************************************功能：读取函数*输入：输出数据 及 数据长度*输出：无*条件：无*返回：成功:RET_SUCCESS 失败:RET_FAILED 或者长度注意:
*********************************************/
T_S32 DRIVER_FLASH_Read(T_S8 *ps8DataBuf, T_S32 s32BufLen)
{T_S32 s32DataLen = 0;return s32DataLen;
}
/*********************************************功能：事件标志*输入：无*输出：无*条件：无*返回：成功:RET_SUCCESS 失败:RET_FAILED 注意:
*********************************************/
T_S32 DRIVER_FLASH_Pop(T_VOID)
{return RET_SUCCESS;
}/*********************************************功能：控制接口*输入：s32Cmd :命令类型pvData:控制数据或者返回数据*条件：无*返回：成功:RET_SUCCESS 失败:RET_FAILED
*********************************************/
T_S32 DRIVER_FLASH_Ioctl(T_S32 s32Cmd, T_VOID *pvData)
{T_S32 s32Ret = RET_SUCCESS;switch(s32Cmd){case E_FLASH_IOCTL_CMD_ERASE:{T_U32 u32i = 0;S_FlashErase *pst = (S_FlashErase *)pvData;__disable_irq();for(u32i = 0; u32i < pst->u32Pages; u32i++){//DRIVER_FLASH_Open();if(mscReturnOk != MSC_ErasePage((uint32_t *)(pst->u32Addr + u32i*FLASH_PAGE_SIZE))){s32Ret = RET_FAILED;}
#if 0           MSC->LOCK = MSC_UNLOCK_CODE;MSC->ADDRB    = pst->u32Addr + u32i*FLASH_PAGE_SIZE;// Load address.    MSC->LOCK = MSC_UNLOCK_CODE;MSC->WRITECMD = MSC_WRITECMD_LADDRIM;MSC->LOCK = MSC_UNLOCK_CODE;MSC->WRITECMD = MSC_WRITECMD_ERASEPAGE;   // Send Erase Page command.while (MSC->STATUS & MSC_STATUS_BUSY);    // Waiting for erase to complete.
#endif}__enable_irq();}break;case E_FLASH_IOCTL_CMD_WRITE:{         S_FlashWrite *pst = (S_FlashWrite *)pvData;T_U32 u32WLen = pst->u32Len;if(u32WLen%4 != 0){u32WLen = u32WLen + (4 - u32WLen%4);}//DRIVER_FLASH_Open();__disable_irq();   if(MSC_WriteWord((uint32_t *)pst->u32Addr, pst->pu8Data, u32WLen)){s32Ret = RET_FAILED;}__enable_irq();
#if 0T_U32 u32i = 0;for(u32i = 0; u32i < pst->u32Len; u32i++)         {MSC->LOCK = MSC_UNLOCK_CODE;MSC->WRITECTRL |= MSC_WRITECTRL_WREN;MSC->LOCK = MSC_UNLOCK_CODE;MSC->ADDRB    = pst->u32Addr + 4*u32i;                  // Load address.MSC->WRITECMD = MSC_WRITECMD_LADDRIM;MSC->LOCK = MSC_UNLOCK_CODE;MSC->WDATA    = 0x11111111;//pst->pu8Data[u32i];               // Load data.MSC->WRITECMD = MSC_WRITECMD_WRITEONCE;  // Trigger write once.while (MSC->STATUS & MSC_STATUS_BUSY);   // Waiting for the write to complete.}
#endif          }break;case E_FLASH_IOCTL_CMD_READ:{T_U32 u32i = 0;S_FlashRead *pst = (S_FlashRead *)pvData;for(u32i = 0; u32i < pst->u32Len; u32i++){pst->pu8Data[u32i] = *(T_U8 *)(pst->u32Addr + u32i);}}break;}return s32Ret;
}/*********************************************功能：写入函数*输入：无*输出：无*条件：无*返回：成功:RET_SUCCESS 失败:RET_FAILED 或者长度注意:
*********************************************/
T_S32 DRIVER_FLASH_Write(T_S8 *ps8DataBuf, T_S32 s32BufLen)
{return s32BufLen;
}static unsigned int gRamBuf[256];
void BSP_FlashWrite(unsigned int Addr, unsigned char *lpBuf, unsigned short n)
{unsigned char *lpOBJ = (unsigned char *)gRamBuf;unsigned int *lpAddr = gRamBuf;unsigned short i;for(i = 0; i < n; i++){lpOBJ[i] = lpBuf[i];}for(i = 0; i < n; i += 4){MSC->ADDRB    = Addr+i;                  // Load address.MSC->WRITECMD = MSC_WRITECMD_LADDRIM;MSC->WDATA    = *lpAddr++;               // Load data.MSC->WRITECMD = MSC_WRITECMD_WRITEONCE;  // Trigger write once.while (MSC->STATUS & MSC_STATUS_BUSY);   // Waiting for the write to complete.}
}

#include <stdio.h>
#include "em_device.h"
#include "ioctrl.h"
#include "xmodem.h"static unsigned int gRawBuf[2][sizeof(XMODEM_PACKET_TYPE)>>2];static unsigned short CRC16E(unsigned char *lpBuf, unsigned short n)
{unsigned short crc = 0x0;unsigned short i;for (i = 0; i < n; i++){crc  = (crc >> 8) | (crc << 8);crc ^= lpBuf[i];crc ^= (crc & 0xff) >> 4;crc ^= crc << 12;crc ^= (crc & 0xff) << 5;}return crc;
}static unsigned short XMODEM_Verify(XMODEM_PACKET_TYPE *Struct, unsigned char Reference)
{if (Struct->Number == Reference){unsigned short crc = (Struct->CRCH<<8)|Struct->CRCL;if(crc == CRC16E(Struct->Data, XMODEM_DATA_SIZE)){return 0;}}return -1;
}static void XMODEM_Wait(void)
{unsigned int i;while (1){xputc(XMODEM_NCG);for (i = 0; i < 2000000; i++){if(xkbhit()){return;}}}
}int xmodem(unsigned int Base, unsigned int End)
{XMODEM_PACKET_TYPE *Struct;unsigned int Addr, i;unsigned char Sequence = 1;#if 0for (Addr = Base; Addr < End; Addr += FLASH_PAGE_SIZE){BSP_FlashErase(Addr);}
#endifXMODEM_Wait();Addr = Base;while (1){// Swap buffer for packet buffer.Struct = (XMODEM_PACKET_TYPE *)gRawBuf[Sequence & 1];// Fetch the first byte of the packet explicitly, as it defines the// rest of the packet.Struct->Header = xgetc();// Check for end of transfer.if (Struct->Header == XMODEM_EOT){// Acknowledget End of transfer.xputc(XMODEM_ACK);return 1;}// If the header is not a start of header (SOH), then cancel// the transfer.if (Struct->Header != XMODEM_SOH){return -1;}// Fill the remaining bytes packet.// Byte 0 is padding, byte 1 is header.for (i = 2; i < sizeof(XMODEM_PACKET_TYPE); i++){((unsigned char *)Struct)[i] = xgetc();}/* Packet Verify */if(0 != XMODEM_Verify(Struct, Sequence)){// On a malformed packet, we send a NAK, and start over.xputc(XMODEM_NAK);return -1;}Sequence++;// Write data to flash.if(Addr < End){//BSP_FlashWrite(Addr, Struct->Data, XMODEM_DATA_SIZE);//memset(Struct->Data, 0x11, XMODEM_DATA_SIZE);S_FlashWrite stFlashWrite;stFlashWrite.u32Addr = Addr;stFlashWrite.pu8Data = Struct->Data;stFlashWrite.u32Len = XMODEM_DATA_SIZE;if(RET_FAILED==DRIVER_FLASH_Ioctl(E_FLASH_IOCTL_CMD_WRITE, &stFlashWrite)){return -1;}Addr += XMODEM_DATA_SIZE;}// Send ACK.xputc(XMODEM_ACK);}
}

2.3 编写软件注意事项

1）操作flash要关闭中断

2）flash写接口要是4的倍数

3）应用程序编译时需要修改起始地址

iar的话需要在 iar的安装路径下找到 Option->Linker->Config里面的 .icf文件

2.4升级步骤

1）打开Tera Term，设置好串口及波特率，复位单片机出现下面的信息，按u进入升级

选择 File->Transfer->XMODEM->send 找到发送文件即可

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