These are commands that are not (yet) explicitly exposed in the C# and C++ library (they are constants define / enum: SPI_Command in te_api.h).
SPI Flash command | Description |
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#define SPI_WREN 0x06 | Set Write Enable Latch |
#define SPI_WRDI 0x04 | Reset Write Enable Latch |
#define SPI_RDSR1 0x05 | Read Status Register 1 |
#define SPI_RDSR2 0x35 | Read Status Register 2 |
#define SPI_WRSR 0x01 | Write Status Register |
#define SPI_READ 0x03 | Read data from memory |
#define SPI_FAST_READ 0x0b | Similar to the READ command, but possibly uses a faster clock |
#define SPI_WRITE 0x02 | Write data to memory array |
#define SPI_SE 0xD8 | Erase one sector in memory |
#define SPI_BE 0xC7 | Erase all memory |
#define SPI_DP 0xb9 | Write Enable Command |
#define SPI_RES 0xab | Read Electonic Signature |
#define SPI_RDID 0x9F | reads the ID of the SPI Flash |
The SPI Command can be dispatched through
In particular, SPI Flash Commands could be used:
First case example (reads the ID of the SPI Flash) | ||||||||||||
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SW host computer: reads the ID of the SPI Flash This is pseudocode close to the real one. Pseudocode, The real code need indirection for SPI command (if written in C#) byte[] Command = new byte[64]; byte[] Reply = new byte[64]; 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 = 0x20 did = 0x20 uid = 0x16 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; /* TE_USB_FX2_SendCommand (Command[0] = (byte) FX2_Commands.CMD_FX2_FLASH_WRITE_COMMAND) calls "case CMD_FLASH_WRITE_COMMAND" "case CMD_FLASH_WRITE_COMMAND" calls spi_command(EP1OUTBUF[1], &EP1OUTBUF[3], EP1OUTBUF[2], &EP1INBUF[1]) with EP1OUTBUF[3]= SPI_RDID SPI Flash Command EP1OUTBUF = Command Reply = EP1INBUF */ if (TE_USB_FX2_SendCommand(..., Command, CmdLength, Reply, ReplyLength, 5000) == true) { LogTextLine += "SPI Flash IDCODE " + "uid = 0x" + Reply[1].ToString("x") + "mid = 0x "+ Reply[2].ToString("x")+ " did = 0x" + Reply[3].ToString("x") + "\r\n"; } C# real code; indirection for SPI commands 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 indirection Command2[0] = (byte)FX2_Commands.CMD_FX2_FLASH_WRITE_COMMAND; Command2[1] = (byte)0x01; //Numeber of SPI commands used by spi_command(): putcSPI(SPI_RDID); Command2[2] = (byte)0x03; //Number of SPI bytes as reply: mid = 0x20 did = 0x20 uid = 0x16 Command2[3] = (byte)0x9F; //(byte)SPI_Commands.CMD_SPI_RDID; // SPI_RDID 0x9F ≡ get ID command 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_SendCommand(..., Command1, CmdLength1, Reply1, ReplyLength1, 5000) == true) { LogTextLine += "SPI Flash IDCODE " + "uid = 0x" + Reply1[1].ToString("x") + "mid = 0x "+ Reply1[2].ToString("x")+ " did = 0x" + Reply1[3].ToString("x") + "\r\n"; } | ||||||||||||
FW running on USB FX2 microcontroller This is a piece of real code (FW running on USB FX2 microcontroller) te_api.c, lines 207-211 EP1INBUF: read Reply[] from USB FX2 microcontroller to host computer EP1OUTBUF: write Command[] from host computer to USB FX2 microcontroller Lines 207-211 of te_api.c case CMD_FLASH_WRITE_COMMAND: EP1INBUF[0] = 0x55; //void spi_command(BYTE CmdLen, unsigned char *CmdData, BYTE RdLen, unsigned char *RdData) spi_command(EP1OUTBUF[1], &EP1OUTBUF[3], EP1OUTBUF[2], &EP1INBUF[1]); new_data = 1; break; /* Command[0] = CMD_FLASH_WRITE_COMMAND; used by TE_USB_FX2_SendCommand () to call "case CMD_FLASH_WRITE_COMMAND" and then spi_command() EP1OUTBUF[1] = CmdLen = Command[1]= CmdLength = 1; // used by spi_command(), MD_SPI_RDID = 0x9F is a single byte EP1OUTBUF[2] = RdLen = Command[2]= ReplyLength = 3; // used by spi_command(), SPI Flash ID should be 3 byte EP1OUTBUF[3] = Command[3] = CMD_SPI_RDID = 0x9F; //used by spi_command() Â Reply[0] = EP1INBUF[0] = 0x55; Reply[1] = EP1INBUF[1] = 0x20; // for example Reply[2] = EP1INBUF[2] = 0x20; // for example Reply[3] = EP1INBUF[3] = 0x16; // for example */
Flash IDCODEs | ||||||||||||
FW running on USB FX2 microcontroller This is a piece of real code spi.c, lines 63-89 Lines 63-89 of spi.c void spi_command(BYTE CmdLen, unsigned char *CmdData, BYTE RdLen, unsigned char *RdData) { volatile unsigned char spi_count, rd_buff;// pr_address; OED = 0x73; // 0b01110011; FPGA_POWER = 0; //power off fpga FLASH_ENABLE; //assert chip select //Write command spi_count = CmdLen; if (spi_count > 64) spi_count = 64; while (spi_count > 0) { putcSPI(*CmdData); //send read command CmdData++; spi_count = spi_count - 1; } //Read response spi_count = RdLen; if (spi_count > 64) spi_count = 64; while (spi_count > 0) { rd_buff = getcSPI(); *RdData = rd_buff; RdData++; spi_count = spi_count - 1; } FLASH_DISABLE; } |