Hi, I just got my hifive-u early board from crowdsupply.
I start to follow “SiFive HiFive Unleashed Getting Started Guide” step by step in a ESD protected lab very carefully.
But it seems doesn’t work after the power on.
no console output from usb-uart (@115200)
no heartbeat light (wait at least 1 min)
no link light toggle for Gigabit Ethernet
I also try another MicroSD card and format the GPT and make DISK... format-boot-loader
JTAG response:
sudo ./bin/openocd -f ../openocd.cfg
Open On-Chip Debugger 0.10.0+dev-g2c183e3-dirty (2018-01-03-10:25)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
adapter speed: 10000 kHz
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : ftdi: if you experience problems at higher adapter clocks, try the command "ftdi_tdo_sample_edge falling"
Info : clock speed 10000 kHz
Error: JTAG scan chain interrogation failed: all zeroes
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: riscv.cpu: IR capture error; saw 0x00 not 0x01
First I check the SCK (pin16) of the ISSI nor flash, I found there is no toggle and clock.
Then I start to check on board power supplies.
I just found there is not power for both VDD_CORE and VDD_SOC_CORE.
It sounds like the board was “Dead on Arrival” - In cases like this, you should work with CrowdSupply to get a working replacement. CrowdSupply usually does not require a RMA number; they simply ask that you ship the board back. Be sure to follow their guidance on shipping (look under the “
Crowd Supply Store Product Return Policy (in-stock and pre-orders)” section of this web page: https://www.crowdsupply.com/returns). We will ensure that CrowdSupply has a board they can send you.
Before I ship the board back to you/crowdsupply, do you mind I hack the board (include some welding work to find where short)? No sure I can fix but it do save time and money (shipping and tariffs).