2020年06月16日 | uboot4--使用jlink烧写mini2440的uboot

Nor Flash烧写过程

uboot -----> SDRAM -----> Nor Flash

因此我们要设置CPU、SDRM地址、Nor Falsh地址

初始化代码

/*********************************************************************

*

* SEGGER J-Link ARM Setup File - Generated by J-Flash ARM V4.08l

*

* Syntax:

*

*   SetJTAGSpeed(Speed);         : Sets the JTAG speed [kHz], (0 = Auto, 0xFFFF = Adaptive)

*   Delay(Delay);                : Waits a given time [msec]

*   DisableMMU();                : Disables the MMU

*   DisableChecks();             : Disables mode check after read operations

*   EnableChecks();              : Enables mode check after read operations

*   Go();                        : Starts the core

*   Halt();                      : Halts the core

*

*   Reset(Delay);                : Resets the target (normal)

*   ResetWP();                   : Resets the target (using watchpoint)

*   ResetDBGRQ();                : Resets the target (using DBGRQ)

*   ResetBP0(Delay);             : Resets the target (using breakpoint @ addr 0)

*   ResetADI();                  : Resets the target (using ADI software reset)

*

*   Read8 (Addr);                : Reads a 8/16/32 bit value,

*   Read16(Addr);                :   Addr = address to read (as hex value)

*   Read32(Addr);                :

*

*   Verify8 (Addr, Data);        : Verifies a 8/16/32 bit value,

*   Verify16(Addr, Data);        :   Addr = address to verify (as hex value)

*   Verify32(Addr, Data);        :   Data = data to verify (as hex value)

*

*   Write8 (Addr, Data);         : Writes a 8/16/32 bit value,

*   Write16(Addr, Data);         :   Addr = address to write (as hex value)

*   Write32(Addr, Data);         :   Data = data to write (as hex value)

*

*   WriteVerify8 (Addr, Data);   : Writes and verifies a 8/16/32 bit value,

*   WriteVerify16(Addr, Data);   :   Addr = address to write (as hex value)

*   WriteVerify32(Addr, Data);   :   Data = data to write (as hex value)

*

*   WriteRegister(Reg, Data);    : Writes a register

*   WriteJTAG_IR(Cmd);           : Writes the JTAG instruction register

*   WriteJTAG_DR(nBits, Data);   : Writes the JTAG data register

*

*   VarAND(Data);                : VAR = VAR AND Data

*   VarOR (Data);                : VAR = VAR OR  Data

*   VarXOR(Data);                : VAR = VAR XOR Data

*   VarBEQ(Index);               : Execute branch

*

*   VarWrite8 (Addr);            : Writes the value of VAR as 8/16/32 bit value,

*   VarWrite16(Addr);            :   Addr = address to write (as hex value)

*   VarWrite32(Addr);            :

*

**********************************************************************

*/

SetJTAGSpeed(5);

Halt();

DisableMMU();

Write32(0x53000000, 0x00000000);        // pWTCON,看门狗定时器

Write32(0x4A000008, 0xFFFFFFFF);        // INTMSK,中断屏蔽寄存器

Write32(0x4A00001C, 0x000007FF);        // INTSUBMSK

Write32(0x56000050, 0x000055AA);        // rGPFCON

Write32(0x4C000014, 0x00000007);        // CLKDIVN

Write32(0x4C000000, 0x00FFFFFF);        // LOCKTIME

Write32(0x4C000004, 0x00061012);

Write32(0x4C000008, 0x00040042);        // UPLLCON

Write32(0x48000000, 0x22111120);        // Bus width &wait

Write32(0x48000004, 0x00002F50);        // Boot Rom control

Write32(0x48000008, 0x00000700);        // Bank1 control

Write32(0x4800000C, 0x00000700);        // Bank2 control

Write32(0x48000010, 0x00000700);        // Bank3 control

Write32(0x48000014, 0x00000700);        // Bank4 control

Write32(0x48000018, 0x0007FFFC);        // Bank5 control

Write32(0x4800001C, 0x00018005);        // Bank6 control

Write32(0x48000020, 0x00018005);        // Bank7 control

Write32(0x48000024, 0x008E0459);        // DRAM/SDRAM

Write32(0x48000028, 0x00000032);        // Flexible  bank size

Write32(0x4800002C, 0x00000030);        // Modify register for sdram

Write32(0x48000030, 0x00000030);        // Modify register for sdram

SetJTAGSpeed(4000);

本次烧写的是Superboot2440.bin，为了使用MiniTools...WIN7无法使用DNW的人伤不起！！！！

完成图展示：