1abb03e514
tang_nano_4k: Review/Cleanup:
...
- Revert abstractions on clk_name/period: Too much abstraction to avoid duplications makes the code more difficult to read.
ex:
- When constraining clk27, frequency is already in the name.
- In the target, we want to know we are using clk27 as the main clk.
- We need a default sys_clk_freq for project only importing BaseSoC.
- Revert SPI Flash import (for consistency with other targets).
- Keep VexRiscv as default CPU since this target is able to run it and also for consistency with other targets.
2022-01-24 18:46:51 +01:00
f078e55bb1
tang nano 4k: fix removed default_clk_period, fix do_finalize signature
2022-01-23 16:47:20 +01:00
6238052b10
tang nano 4k: disable spi flash with gowin emcu, cleanup
2022-01-23 16:10:46 +01:00
d5eea94289
sispeed_tang_nano_4k: Avoid IOStandard constraints on HyperRAM (Not present in example designs).
2021-09-20 11:46:10 +02:00
5190c9c869
sipeed_tang_nano_4k: Initial Video Out support.
...
With colorbars for now, need to free up BRAMS for Video Terminal (or finish HyperRAM support).
2021-09-20 09:32:20 +02:00
376a836583
sipeed_tang_nano: Add SPI Flash, Enable CPU and use new external SPI Flash support from OpenFPGALoader.
...
./sipeed_tang_nano_4k.py --cpu-type=vexriscv --cpu-variant=lite --build --flash
__ _ __ _ __
/ / (_) /____ | |/_/
/ /__/ / __/ -_)> <
/____/_/\__/\__/_/|_|
Build your hardware, easily!
(c) Copyright 2012-2021 Enjoy-Digital
(c) Copyright 2007-2015 M-Labs
BIOS built on Sep 17 2021 15:54:08
BIOS CRC passed (6cc6de6d)
Migen git sha1: a5bc262
LiteX git sha1: 46cd9c5a
--=============== SoC ==================--
CPU: VexRiscv_Lite @ 27MHz
BUS: WISHBONE 32-bit @ 4GiB
CSR: 32-bit data
ROM: 64KiB
SRAM: 8KiB
FLASH: 4096KiB
--========== Initialization ============--
Initializing W25Q32 SPI Flash @0x80000000...
SPI Flash clk configured to 13 MHz
Memspeed at 0x80000000 (Sequential, 4.0KiB)...
Read speed: 1.3MiB/s
Memspeed at 0x80000000 (Random, 4.0KiB)...
Read speed: 521.9KiB/s
--============== Boot ==================--
Booting from serial...
Press Q or ESC to abort boot completely.
sL5DdSMmkekro
Timeout
No boot medium found
--============= Console ================--
litex>
2021-09-17 15:57:55 +02:00
fed36afaba
platforms/sipeed_tang_nano_4k: fix period computation
2021-09-15 06:46:29 +02:00
945e48ea83
platforms/sipeed_tang_nano_4k: add P6 and P7 connectors
2021-09-09 11:35:14 +02:00
8d91489756
tang_nano_4k: Add more IOs.
2021-09-09 11:23:20 +02:00
88534c6689
tang_nano_4k: Fix typo in sipeed.
2021-09-08 23:02:39 +02:00
Florent Kermarrec
Ilia Sergachev
Gwenhael Goavec-Merou