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These are commands that are not (yet) explicitly exposed in the C# and C++ library (they are constants define / enum: SPI_Command in a .h firmware file ?????).

The SPI Command can be dispatched through

• a particular SW API function: TE_USB_FX2_SendCommand(..., command_array, …) where
• "command_array" is a byte array that contains both
  • CMD_FLASH_WRITE_COMMAND (call the spi_command() firmware function in the TE USB FX2 microcontroller) and
  • SPI Flash Commands (multiple SPI Flash Commands could be dispatched through spi_command() firmware called before).

In particular, SPI Flash Commands could be used:

• to reads the ID of the SPI Flash (# Define SPI_RDID 0x9F)
• to unlock the SPI Flash.

First case pseudocode example:

Command[0] = (byte) FX2_Commands.CMD_FX2_FLASH_WRITE_COMMAND;

Command[1] = (byte) 1; //Numeber of SPI commands used by spi_command() : putcSPI(SPI_RDID); 

Command[2] = (byte) 3; //Number of SPI bytes as reply: mid == 0xEF && did == 0x40 && uid == 0x17

Command[3] = (byte) 0x9F;//(byte)SPI_Commands.CMD_SPI_RDID; // SPI_RDID 0x9F ≡ get ID command

Command[4] = (byte)0;

Command[5] = (byte)0;

Command[6] = (byte)0;

case CMD_FLASH_WRITE_COMMAND:

EP1INBUF[0] = 0x55;

spi_command(EP1OUTBUF[1], &EP1OUTBUF[3], EP1OUTBUF[2], &EP1INBUF[1]);

new_data = 1;

break;

void spi_command(BYTE CmdLen, unsigned char *CmdData, BYTE RdLen, unsigned char *RdData)

aka

Command[0] = CMD_FLASH_WRITE_COMMAND; used by TE_USB_FX2_SendCommand () Command[1] = CmdLen = 1; used by spi_command() Command[2] = RdLen = 3; // if((mid == 0xEF) && (did == 0x40) && (uid == 0x17)) //used by spi_command() Command[3] = CMD_SPI_RDID = 0x9F; //used by spi_command() Reply[0] = EP1INBUF[0] = 0x55; Reply[1] = EP1INBUF[1] = 0xEF; Reply[2] = EP1INBUF[2] = 0x40; Reply[3] = EP1INBUF[3] = 0x17;

byte[] Command1 = new byte[64];

byte[] Reply1 = new byte[64];

int CmdLength1 = 4;

int ReplyLength1 = 64;

byte[] Command2 = new byte[64];

byte[] Reply2 = new byte[64];

int CmdLength2 = 64;

int ReplyLength2 = 64;

//To use the firmware function spi_command() you need to use a double indirection

Command2[0] = (byte)FX2_Commands.CMD_FX2_FLASH_WRITE_COMMAND;

Command2[1] = (byte)0x01;//(byte)FX2_Commands.CMD_SPI_RDID;

Command2[2] = (byte)0x03;

Command2[3] = (byte)0x9F;

//To use the firmware function spi_command() you need to use a double indirection

Command1[0] = Command2[0];

Command1[1] = Command2[1];

Command1[2] = Command2[2];

Command1[3] = Command2[3];

Command1[4] = (byte)0;

Command1[5] = (byte)0;

Command1[6] = (byte)0;

if (TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand(ref TE_USB_FX2_USBDevice, ref Command1, ref CmdLength1, ref Reply1, ref ReplyLength1, 5000) == true)

{

LogTextLine += "SPI Flash IDCODE 0x" + Reply1[1].ToString("x") + " 0x"

+ Reply1[2].ToString("x") + " 0x" + Reply1[3].ToString("x") + "\r\n";

}

else

{

LogTextLine += "SPI Flash IDCODE 0x" + Reply1[1].ToString("x") + " 0x"

+ Reply1[2].ToString("x") + " 0x" + Reply1[3].ToString("x") + "\r\n";

}

-------------------------------------------------

The SPI Command can be dispatched through

• a particular SW API function: TE_USB_FX2_SendCommand(..., Command, …) where
• "command_array" is a byte array that contains both
  • CMD_FLASH_WRITE_COMMAND (call the spi_command() firmware function in the TE USB FX2 microcontroller) and
  • SPI Flash Commands (multiple SPI Flash Commands could be dispatched through spi_command() firmware called before).

In particular, SPI Flash Commands could be used:

• to reads the ID of the SPI Flash (# Define SPI_RDID 0x9F)
• to unlock the SPI Flash.

First case example (reads the ID of the SPI Flash):

byte[] Command1 = new byte[64];

byte[] Reply1 = new byte[64];

int CmdLength1 = 4;

int ReplyLength1 = 64;

byte[] Command2 = new byte[64];

byte[] Reply2 = new byte[64];

int CmdLength2 = 64;

int ReplyLength2 = 64;

//To use the firmware function spi_command() you need to use a double indirection

Command2[0] = (byte)FX2_Commands.CMD_FX2_FLASH_WRITE_COMMAND;

Command2[1] = (byte)0x01;//(byte)FX2_Commands.CMD_SPI_RDID;

Command2[2] = (byte)0x03;

Command2[3] = (byte)0x9F;

//To use the firmware function spi_command() you need to use a double indirection

Command1[0] = Command2[0];

Command1[1] = Command2[1];

Command1[2] = Command2[2];

Command1[3] = Command2[3];

Command1[4] = (byte)0;

Command1[5] = (byte)0;

Command1[6] = (byte)0;

if (TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand(ref TE_USB_FX2_USBDevice, ref Command1, ref CmdLength1, ref Reply1, ref ReplyLength1, 5000) == true)

{

LogTextLine += "SPI Flash IDCODE 0x" + Reply1[1].ToString("x") + " 0x"

+ Reply1[2].ToString("x") + " 0x" + Reply1[3].ToString("x") + "\r\n";

}

else

{

LogTextLine += "SPI Flash IDCODE 0x" + Reply1[1].ToString("x") + " 0x"

+ Reply1[2].ToString("x") + " 0x" + Reply1[3].ToString("x") + "\r\n";

}

if (TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand(ref TE_USB_FX2_USBDevice, ref Command, ref CmdLength, ref Reply, ref ReplyLength, 20000) == false) LogTextLine += "Doesn't work" + "\r\n"; else { LogTextLine += "Doesn't work" + "\r\n" } As explained bellow the problems seems some unmatched settings. There is a problem with SPI_RDID command used in process_flash_id(): it requires two "settings" not normally present (FPGA_PROG= 0; and busy_polling();) in spi_command () function and spi_command () has a setting in not equired (FPGA_POWER=0;) for SPI_RDID used in process_flash_id(). -----------------------------------

FX2_Commands.CMD_FX2_FLASH_WRITE_COMMAND call spi_command(), in spi_command 0x9F SPI command (CMD_SPI_RDID) is used

------------------------------

// SPI Flash commands

#define SPI_READ 0x03

#define SPI_WREN 0x06

#define SPI_WRDI 0x04

#define SPI_RDSR1 0x05

#define SPI_RDSR2 0x35

#define SPI_WRSR 0x01

#define SPI_READ 0x03

#define SPI_FAST_READ 0x0b

#define SPI_WRITE 0x02

#define SPI_SE 0xD8

#define SPI_BE 0xC7

#define SPI_DP 0xb9

#define SPI_RES 0xab

-----------------------

 #define SPI_RDID 0x9F

https://github.com/Trenz-Electronic/TE-USB-Suite/blob/master/TE_USB_FX2.firmware/te_usb_api.ver.3.2/te_api.c

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