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使用 JLink 获取 SoC 出厂信息¶

Panchip 会在每一颗量产的 PAN108x SoC 芯片中预写入一些硬件信息，如 UUID、MAC Address 等供用户使用。

有时候，我们需要在最终产品的量产阶段使用这些信息，这里介绍一种使用 JLink Command Line 方式读取这些信息的方法。

例如，为获取 SoC 芯片预存储的蓝牙 MAC Address，我们可以执行以下步骤：

在<PAN1080-ZDK>\01_SDK目录下，新建一个名为GetMacAddress.JLinkScript的文本文件，填入如下内容并保存：

/*
* JLink Script File
* For more infomation using this script, please refer to Segger Wiki Website:
*   https://wiki.segger.com/J-Link_script_files#Using_J-Link_script_files
*/

/*
* PAN108X FMC Registers Map:
*
* #define FLCTL_BASE			(0x40050000UL)
* #define FLCTL_BUFF_BASE		(0x40050400UL)
*
* #define FLCTL_CTL			(0x40050000UL)
* #define FLCTL_TRG			(0x40050004UL)
* #define FLCTL_CONFIG			(0x40050005UL)
* #define FLCTL_WD0			(0x40050006UL)
* #define FLCTL_WD1			(0x40050007UL)
* #define FLCTL_WD2			(0x40050008UL)
* #define FLCTL_WD3			(0x40050009UL)
* #define FLCTL_WD4			(0x4005000AUL)
* #define FLCTL_WD5			(0x4005000BUL)
* #define FLCTL_X_MODE			(0x4005000CUL)
*/

int GetMacAddressFromFlashInfoArea(void)
{
   U8 flctl_config;
   U32 flctl_ctl;
   int offset, size;
   int i;
   U8 mac_addr[6];

   offset = 0x1B; // offset where stores mac address
   size = 0x6; // mac address size
   i = 0;

   // Enable access of flash info area
   flctl_config = JLINK_MEM_ReadU8(0x40050005);
   JLINK_MEM_WriteU8(0x40050005, flctl_config | 0x2);

   // Read Mac Address from flash info area (offset: 0x1B ~ 0x20)
   JLINK_MEM_WriteU32(0x40050000, (size << 8) | 0x5); // CTL, configure to read <size> bytes
   JLINK_MEM_WriteU8(0x40050006, 0x3B); // WD0, CMD_DREAD
   JLINK_MEM_WriteU8(0x40050007, 0x00); // WD1
   JLINK_MEM_WriteU8(0x40050008, 0x00); // WD2
   JLINK_MEM_WriteU8(0x40050009, offset); // WD3, configure to read from info <offset> location
   JLINK_MEM_WriteU8(0x4005000A, 0xFF); // WD4
   JLINK_MEM_WriteU8(0x4005000B, 0xFF); // WD5
   JLINK_MEM_WriteU8(0x40050004, 0x01); // Trigger flash operation
   while (JLINK_MEM_ReadU8(0x40050004)) {
      // busy wait FLCTL_TRG flag cleared
      JLINK_SYS_Sleep(10);
   }

   // Re-disable access of flash info area
   flctl_config = JLINK_MEM_ReadU8(0x40050005);
   JLINK_MEM_WriteU8(0x40050005, flctl_config & ~0x2);

   // Copy data from FLCTL buffer to array mac_addr[6]
   do {
      mac_addr[i] = JLINK_MEM_ReadU8(0x40050400 + i);
      i += 1;
   } while (i < 6);

   // Print out Mac Address
   JLINK_SYS_Report1("Mac Address [0]: ", mac_addr[0]);
   JLINK_SYS_Report1("Mac Address [1]: ", mac_addr[1]);
   JLINK_SYS_Report1("Mac Address [2]: ", mac_addr[2]);
   JLINK_SYS_Report1("Mac Address [3]: ", mac_addr[3]);
   JLINK_SYS_Report1("Mac Address [4]: ", mac_addr[4]);
   JLINK_SYS_Report1("Mac Address [5]: ", mac_addr[5]);

   return 0;
}

int SetupTarget(void)
{
   JLINK_SYS_Report("SetupTarget()");

   GetMacAddressFromFlashInfoArea();

   return 0;
}

int AfterResetTarget(void)
{
   JLINK_SYS_Report("AfterResetTarget()");

   return 0;
}

双击当前目录下的 PAN1080 SDK CLI 图标，打开 PAN1080 SDK Command Line 命令行界面：

SDK CLI Opened¶

输入以下命令并回车：

jlink -autoconnect 1 -device PAN1080XB -if swd -speed 2000 -JLinkScriptFile GetMacAddress.JLinkScript

即可读取到当前 SoC 的 MAC Address：

D:\PDK\pan1080-zdk-internal\01_SDK>jlink -autoconnect 1 -device PAN1080XB -if swd -speed 2000 -JLinkScriptFile GetMacAddress.JLinkScript
SEGGER J-Link Commander V6.44b (Compiled Mar 15 2019 12:10:40)
DLL version V6.44b, compiled Mar 15 2019 12:08:42

Connecting to J-Link via USB...O.K.
Firmware: J-Link V9 compiled Oct 25 2018 11:46:07
Hardware version: V9.40
S/N: 59404884
License(s): RDI, GDB, FlashDL, FlashBP, JFlash
VTref=3.369V
Device "PAN1080XB" selected.


Connecting to target via SWD
Found SW-DP with ID 0x0BB11477
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x04770021)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410CC200. Implementer code: 0x41 (ARM)
Found Cortex-M0 r0p0, Little endian.
FPUnit: 4 code (BP) slots and 0 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB008 SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 000BB00A DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 000BB00B FPB
SetupTarget()
Mac Address [0]: 0x000000D0
Mac Address [1]: 0x00000000
Mac Address [2]: 0x0000000A
Mac Address [3]: 0x00000000
Mac Address [4]: 0x00000009
Mac Address [5]: 0x00000074
Cortex-M0 identified.
J-Link>

上述 Log 中，有效信息为末尾的 Mac Address [0] ~ [5]，每个 32 bit 数据中，低 8 位为 Mac Address 信息。例如，从上述 Log 可知，当前芯片的 Mac Address 为：0xD0 0x00 0x0A 0x00 0x09 0x74