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- 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:
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Command[1] = (byte) 1; //Numeber of SPI commands used by spi_command() : putcSPI(SPI_RDID); // get ID command
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;
byte[] Command1 = new byte[64];
case CMD_FLASH_WRITE_COMMAND:
byteEP1INBUF[0] Reply1 = new byte[64]0x55;
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";
}
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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_FX2if (TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand(ref TE_USB_FX2_USBDevice, ref CommandCommand1, ref CmdLengthCmdLength1, ref ReplyReply1, ref ReplyLengthReplyLength1, 200005000) == false) true)
{
LogTextLine += "SPI Flash IDCODE 0x" + Reply1[1].ToString("x") + " 0x"
+ Reply1[2].ToString("x") + " 0x" + Reply1[3].ToString("x") Doesn't work" + "\r\n"; else { LogTextLine += "Doesn't work" + "\r\n";
}
else
{
LogTextLine += "SPI Flash IDCODE 0x" + Reply1[1].ToString("x") + " 0x"
+ Reply1[2].ToString("x") + " 0x" + Reply1[3].ToString("x") + "\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(). -----------------------------------
if (TE_USB_FX2.TE_USB_CommandsFX2.CMDTE_USB_FX2_FLASH_WRITE_COMMAND call spi_command(), in spi_command 0x9F SPI command (CMD_SPI_RDID) is used
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
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
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;
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