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b50a8dbe41
Add GPIO extender initial configuration that is needed to configure some important GPIOs and ensure that the dev board is ready to work. Add i2c_write function that make a write transfer to any slave device. Give a new Product ID to ANGIE to make it different than the non programmed ANGIE. Change-Id: I0a8dacb7fe218145b7d3ed1cb75f106ed6256714 Signed-off-by: Ahmed BOUDJELIDA <aboudjelida@nanoxplore.com> Reviewed-on: https://review.openocd.org/c/openocd/+/8072 Tested-by: jenkins Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com> |
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#SPDX-License-Identifier: GPL-2.0-or-later This is the ANGIE firmware for ANGIE USB-JTAG adapter. The main components of ANGIE adapter are: - Cypress EZ-USB FX2 microcontroller - Spartan-6 FPGA - SRAM memory chip - Pin headers for various JTAG pin assignments To compile the firmware, the SDCC compiler package is required. Most Linux distributions include SDCC in their official package repositories. The SDCC source code can be found at http://sdcc.sourceforge.net/ Simply type "make bin" in the ANGIE directory to compile the firmware. "make clean" will remove all generated files except the BIN file required for downloading the firmware to ANGIE. Note that the EZ-USB FX2 microcontroller does not have on-chip flash, ANGIE include on-board EEPROM memory to store the firmware program of the FX2, but we are not going to use this method. Instead, upon initial connection of the ANGIE adapter to the host PC via USB, the EZ-USB FX2 core has enough intelligence to act as a stand-alone USB device, responding to USB control requests and allowing firmware download via a special VENDOR-type control request. Then, the EZ-USB microcontroller simulates a disconnect and re-connect to the USB bus. It may take up to two seconds for the host to recognize the newly connected device before OpenOCD can proceed to execute JTAG commands. This delay is only visible when OpenOCD first uses a blank (unconfigured) ANGIE device. Once the firmware downloaded, the FX2 microcontroller activate its GPIF mode, download the Spartan-6 FPGA's bitstream, program the FPGA rapidly, and switch back to default io mode. Once the user disconnects the ANGIE adapter, all its memory contents are lost and the firmware & bitstream download process has to be executed again.