ulink_load_firmware() function

pointer to struct ulink identifying ULINK driver instance.

an absolute or relative path to the Intel HEX file containing the firmware image.

USB helper functions *************************** Opens the ULINK device Currently, only the original ULINK is supported

Releases the ULINK interface and closes the USB device handle.

ULINK CPU (EZ-USB) specific functions ******************* Writes '0' or '1' to the CPUCS register, putting the EZ-USB CPU into reset or out of reset.

Puts the ULINK's EZ-USB microcontroller into reset state, downloads the firmware image, resumes the microcontroller and re-enumerates USB devices.

Print the OpenULINK command queue to stdout.

Perform JTAG scan Creates and appends a JTAG scan command to the OpenULINK command queue. A JTAG scan consists of three steps: - Move to the desired SHIFT state, depending on scan type (IR/DR scan). - Shift TDI data into the JTAG chain, optionally reading the TDO pin. - Move to the desired end state.

Perform TAP state transitions

Generate a defined amount of TCK clock cycles All other JTAG signals are left unchanged.

Read JTAG signals.

Arbitrarily set JTAG output signals.

Sleep for a pre-defined number of microseconds

Set TCK delay counters

Turn on/off ULINK LEDs.

Test command. Used to check if the ULINK device is ready to accept new commands.

Sleep for a specific amount of time.

Generate TCK cycles while remaining in a stable state.

Perform post-processing of commands after OpenULINK queue has been executed.

Send one contiguous firmware section to the ULINK's EZ-USB microcontroller over the USB bus.

OpenULINK command queue helper functions ***************** Get the current number of bytes in the queue, including command IDs.

Clear the OpenULINK command queue.

Add a command to the OpenULINK command queue.

Sends all queued OpenULINK commands to the ULINK for execution.

Move from the current TAP state to the current TAP end state.

Perform a scan operation on a JTAG register.

Move the TAP into the Test Logic Reset state.

Run Test. Generate TCK clock cycles while remaining in the Run-Test/Idle state.

Execute a JTAG_RESET command

Move to one TAP state or several states in succession.