05-17-2019 12:08 AM
Artix-7FPGA ac701评估工具包承载了一个基于德州仪器(TI)ucd90120a电源排序器和监视器的电力系统。这些电源控制器需要一个XML配置文件才能在这些平台上正常工作。ac701提供了预先编程的这个XML文件和适当的设置。附加的XML文件(ac 701_revb_ti_xml.zip)可用于将ap 701评估工具包上的电源控制器重新编程到工厂默认配置。只需重新编程电源控制器的XML文件。
现在，我需要重新编程，根据 AR# 57452 应答记录中列出的编程步骤。
05-20-2019 03:21 PM
Question 1: How do I order an adapter? I did not find a suitable connector in the previously purchased AC701 kit. What should I pay attention to in subsequent connection and download problems?
Answer: If you want to program the XML file into the UCD90x device, you'll need TI's USB Interface Adapter:
Question 2: In the future design, there may be certain requirements for the power-on sequence. Can the user write a configuration file according to their own needs? How to write it?
Answer: Yes, you can do that with TI's software.
05-20-2019 06:47 PM
Thank you for your reply! when I read the AR# 37561 Records, there is a Caution:
Caution: Xilinx does not recommend changing any of the parameters on the power rails from the factory settings as the board components could be inadvertently damaged.
Could I change these settings without damaging the development board, what should I pay attention to?Thank you!
05-21-2019 09:37 AM
I thought you wanted to create a new XML for your own board!
I agree that you shouldn't change the rails from the factory settings; which rail did you want to change and why?
05-22-2019 03:05 AM
XDMA design on the AC701 board, using the driver provided by Xilinx. The generated binary file is written to flash, and the FPGA is loaded from flash when power is turned on. Restart the boot, the DMA device is not detected during the BIOS self-test, so it is necessary to shorten the FPGA power-on time, so that the FPGA has been loaded before the BIOS self-test. So I need to change the power configuration。Thank you !
05-22-2019 09:01 AM
Oh, I get it now! So you'd keep the same power levels and ramp up and down, just delay the start of it.
I've never seen any customer do it, but sounds reasonable. Maybe @travisc has experience on this?
05-26-2019 11:01 AM
There are other methods to achieve short time of configuration.
1. Tandem Configuration
2. Bitstream Configuration
3. Increasing clock speed of configuration
Make sure you have tried all until you Fidel with power supplies.
05-27-2019 01:51 AM
I looked at the schematic of the AC701 board. I checked the connection relationship between the PMbus connector and the FPGA, power controller U8, and U9. When I configure the power controller using the Firmware & Configuration Download Tool (refer to AR# 57452). The configuration details are configured directly through the PMBUS connector J2 for U8U9 or is it controlled by the FPGA? If an FPGA is used, is the IIC bus used? How does the FPGA allocate the IIC bus?
Below is the J2 schematic and the connection I have organized.Thank you!
05-29-2019 10:08 AM
The configuration details are configured directly through the PMBUS connector J2 for U8U9 or is it controlled by the FPGA?
- The details are for the J2 connector with a TI dongle.
If an FPGA is used, is the IIC bus used? How does the FPGA allocate the IIC bus?
- The connection of PMBUS_CLK and PMBUS_DATA to the FPGA are provided, but I couldn't find any example design that uses them. The only provided method to update the U8 & U9 is through the J2 connector.