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
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.
Any suggestion? Thanks!
I found VDD_CORE and GND are short (very low resistance).