You must have openocd 0.10.0 installed.
$ ./openocd/flash-arty ~/microwatt-fusesoc/build/microwatt_0/arty_a7-35-vivado/microwatt_0.bit
Open On-Chip Debugger 0.10.0
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
none separate
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
adapter speed: 25000 kHz
fpga_program
Info : ftdi: if you experience problems at higher adapter clocks, try the command "ftdi_tdo_sample_edge falling"
Info : clock speed 25000 kHz
Info : JTAG tap: xc7.tap tap/device found: 0x0362d093 (mfg: 0x049 (Xilinx), part: 0x362d, ver: 0x0)
loaded file microwatt/openocd/bscan_spi_xc7a35t.bit to pld device 0 in 0s 136459us
Info : JTAG tap: xc7.tap tap/device found: 0x0362d093 (mfg: 0x049 (Xilinx), part: 0x362d, ver: 0x0)
Info : Found flash device 'micron n25q128' (ID 0x0018ba20)
flash 'jtagspi' found at 0x00000000
auto erase enabled
Info : Found flash device 'micron n25q128' (ID 0x0018ba20)
Info : Found flash device 'micron n25q128' (ID 0x0018ba20)
Info : Found flash device 'micron n25q128' (ID 0x0018ba20)
Info : sector 0 took 241 ms
Info : sector 1 took 242 ms
Info : sector 2 took 241 ms
Info : sector 3 took 247 ms
Info : sector 4 took 253 ms
Info : sector 5 took 244 ms
Info : sector 6 took 246 ms
Info : sector 7 took 237 ms
Info : sector 8 took 258 ms
Info : sector 9 took 260 ms
Info : sector 10 took 262 ms
Info : sector 11 took 253 ms
Info : sector 12 took 256 ms
Info : sector 13 took 255 ms
wrote 917504 bytes from file microwatt-fusesoc/build/microwatt_0/arty_a7-35-vivado/microwatt_0.bit in 9.642746s (92.920 KiB/s)
Info : Found flash device 'micron n25q128' (ID 0x0018ba20)
read 907483 bytes from file microwatt-fusesoc/build/microwatt_0/arty_a7-35-vivado/microwatt_0.bit and flash bank 0 at offset 0x00000000 in 0.557387s (1589.944 KiB/s)
contents match
Signed-off-by: Joel Stanley <joel@jms.id.au>
A first pass at ghdl synthesis using yosys and nextpnr. It runs hello world
or micropython if the FPGA has enough block RAM (eg ECP5 85F). The hello
world testcase also loops UART rx to tx in software (ie not a hardware
loopback).
It uses Docker images, so no software needs to be installed. If you prefer
podman you can use that too. Edit Makefile.synth to configure your FPGA,
JTAG device etc.
To build:
make -f Makefile.synth
and to program:
make -f Makefile.synth prog
A few issues:
We need to add PLL support. Right now Microwatt runs at whatever the
external clock frequency is and the baud rate gets scaled by how far off
50MHz it is. This means on the ecp5-evn with a 12 MHz clock rate the baud
rate is a quite strange 27650 (115200 * 50 / 12). On my OrangeCrab with a
50MHz clock the UART is 115200.
It uses a large amount of resources, way more than it should. There are
still some ghdl/yosys issues to be sorted out.
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
Joel Stanley