AN 425: Using the Command-Line Jam STAPL Solution for Device Programming

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ID 683089
Date 12/09/2016
Public
Document Table of Contents
Document Table of Contents x
1. Using the Command-Line Jam STAPL Solution for Device Programming
1. Using the Command-Line Jam STAPL Solution for Device Programming x
1.1. Jam STAPL Players 1.2. Jam STAPL Files 1.3. Using the Jam STAPL Player 1.4. Using the quartus_jli Command-Line Executable 1.5. Using Jam STAPL for ISP with an Embedded Processor 1.6. Board Layout 1.7. Embedded Jam STAPL Players 1.8. Updating Devices Using Jam 1.9. Document Revision History
1.1. Jam STAPL Players x
1.1.1. Differences Between the Jam STAPL Players and quartus_jli
1.2. Jam STAPL Files x
1.2.1. Generating Byte-Code Jam STAPL Files 1.2.2. List of Supported .jam and .jbc Actions and Procedures 1.2.3. Jam STAPL Player and quartus_jli Exit Codes
1.2.2. List of Supported .jam and .jbc Actions and Procedures x
1.2.2.1. Definitions of .jam and .jbc Action and Procedure Statements
1.4. Using the quartus_jli Command-Line Executable x
1.4.1. Command-line Syntax of quartus_jli Command-Line Executable
1.5. Using Jam STAPL for ISP with an Embedded Processor x
1.5.1. Methods to Connect the JTAG Chain to the Embedded Processor
1.5.1. Methods to Connect the JTAG Chain to the Embedded Processor x
1.5.1.1. Connecting the Embedded Processor Directly to the JTAG Chain 1.5.1.2. Connecting the JTAG Chain to an Existing Bus Using an Interface Device
1.6. Board Layout x
1.6.1. Treat the TCK Signal Trace as a Clock Tree 1.6.2. Use a Pull-Down Resistor on the TCK Signal 1.6.3. Make the JTAG Signal Traces as Short as Possible 1.6.4. Add External Resistors to Pull the Outputs to a Defined Logic Level
1.7. Embedded Jam STAPL Players x
1.7.1. The Jam STAPL Byte-Code Player 1.7.2. Steps to Port the Jam STAPL Byte-Code Player 1.7.3. Jam STAPL Byte-Code Player Memory Usage
1.7.2. Steps to Port the Jam STAPL Byte-Code Player x
1.7.2.1. Step 1: Set the Preprocessor Statements to Exclude Extraneous Code 1.7.2.2. Step 2: Map the JTAG Signals to the Hardware Pins PC Parallel Port Signal Mapping Sample Source Code for jbi_jtag_io() 1.7.2.3. Step 3: Handle Text Messages from jbi_export() 1.7.2.4. Step 4: Customize Delay Calibration
1.7.3. Jam STAPL Byte-Code Player Memory Usage x
1.7.3.1. Estimating ROM Usage 1.7.3.2. Estimating Dynamic Memory Usage 1.7.3.3. Example of Calculating DRAM Required by Jam STAPL Byte-Code Player
1.7.3.1. Estimating ROM Usage x
1.7.3.1.1. Algorithm File Size Constants 1.7.3.1.2. Compressed and Uncompressed Data Size Constants 1.7.3.1.3. Jam STAP Byte-Code Player Size
1.8. Updating Devices Using Jam x
1.8.1. jbi_execute Parameters 1.8.2. Running the Jam STAPL Byte-Code Player
1. Using the Command-Line Jam STAPL Solution for Device Programming

1.7.2.2. Step 2: Map the JTAG Signals to the Hardware Pins

The jbi_jtag_io() function in jbistub.c contains the code that sends and receives the binary programming data. By default, the source code writes to the parallel port of the PC. You must remap all four JTAG signals to the pins of the embedded processor.
Figure 11. Default PC Parallel Port Signal MappingThis figure shows the jbi_jtag_io() signal mapping of the JTAG pins to the parallel port registers of the PC. The PC parallel port hardware inverts the most significant bit: TDO.


PC Parallel Port Signal Mapping Sample Source Code for jbi_jtag_io()

int jbi_jtag_io(int tms, int tdi, int read_tdo)
{
    int data = 0;
    int tdo = 0;

    if (!jtag_hardware_initialized)
    {
        initialize_jtag_hardware();
        jtag_hardware_initialized = TRUE;
    }
    data = ((tdi ? 0x40 : 0) | (tms ? 0x2 : 0));    /*TDI,TMS*/
    write_byteblaster(0, data);

    if (read_tdo)
    {
        tdo = (read_byteblaster(1) & 0x80) ? 0 : 1; /*TDO*/
    }
    write_blaster(0, data | 0x01);                  /*TCK*/
    write_blaster(0, data);

    return (tdo);
}
  • The PC parallel port inverts the actual value of TDO. Because of this, the jbi_jtag_io() function in the preceding code inverts the value again to retrieve the original data in the following line: 
    tdo = (read_byteblaster(1) & 0x80) ? 0 : 1;
  • If your target processor does not invert TDO, use the following code: 
    tdo = (read_byteblaster(1) & 0x80) ? 1 : 0;
  • To map the signals to the correct addresses, use the left shift (<<) or right shift (>>) operator. For example, if TMS and TDI are at ports 2 and 3, respectively, use this code: 
    data = (((tdi ? 0x40 : 0) >> 3) | ((tms ? 0x02 : 0) << 1));
  • Apply the same process to TCK and TDO.

The read_byteblaster and write_byteblaster signals use the inp() and outp() functions from the conio.h library, respectively, to read and write to the port. If these functions are not available, you must substitute them with equivalent functions.

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