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sipeed_tang_nano_4k: add initial Gowin EMCU support

This commit is contained in:
Ilia Sergachev 2021-12-08 23:50:14 +01:00
parent 4287ab561e
commit 13c83ba532
1 changed files with 24 additions and 12 deletions
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18
litex_boards/targets/sipeed_tang_nano_4k.py
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@ -64,11 +64,16 @@ class _CRG(Module):
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
mem_map = {**SoCCore.mem_map, **{"spiflash": 0x80000000}}
def __init__(self, sys_clk_freq=int(27e6), with_hyperram=False, with_led_chaser=True, with_video_terminal=True, **kwargs):
platform = tang_nano_4k.Platform()
if 'cpu_type' in kwargs and kwargs['cpu_type'] == 'gowin_emcu':
kwargs['with_uart'] = False # CPU has own UART
kwargs['integrated_sram_size'] = 0 # SRAM is directly attached to CPU
kwargs["integrated_rom_size"] = 0 # boot flash directly attached to CPU
else:
# Put BIOS in SPIFlash to save BlockRAMs.
self.mem_map = {**SoCCore.mem_map, **{"spiflash": 0x80000000}}
kwargs["integrated_rom_size"] = 0
kwargs["cpu_reset_address"] = self.mem_map["spiflash"] + 0
@ -89,6 +94,7 @@ class BaseSoC(SoCCore):
from litespi.opcodes import SpiNorFlashOpCodes as Codes
self.add_spi_flash(mode="1x", module=W25Q32(Codes.READ_1_1_1), with_master=False)
if self.cpu_type != 'gowin_emcu':
# Add ROM linker region --------------------------------------------------------------------
self.bus.add_region("rom", SoCRegion(
origin = self.mem_map["spiflash"] + 0,
@ -136,12 +142,18 @@ def main():
soc_core_args(parser)
args = parser.parse_args()
if args.cpu_type == 'gowin_emcu':
# FIXME: ARM software not supported yet
args.no_compile_software = True
soc_core_kwargs = soc_core_argdict(args)
soc = BaseSoC(
sys_clk_freq=int(float(args.sys_clk_freq)),
**soc_core_argdict(args)
**soc_core_kwargs
)
builder = Builder(soc, **builder_argdict(args))
builder_kwargs = builder_argdict(args)
builder = Builder(soc, **builder_kwargs)
builder.build(run=args.build)
if args.load: