def __init__(self,
bios_flash_offset,
sys_clk_freq=int(12e6),
with_led_chaser=True,
**kwargs):
kwargs["uart_name"] = "usb_acm" # Enforce UART to USB-ACM
platform = fomu_pvt.Platform()
# Disable Integrated ROM/SRAM since too large for iCE40 and UP5K has specific SPRAM.
kwargs["integrated_sram_size"] = 0
kwargs["integrated_rom_size"] = 0
# Set CPU variant / reset address
kwargs[
"cpu_reset_address"] = self.mem_map["spiflash"] + bios_flash_offset
# Serial -----------------------------------------------------------------------------------
# FIXME: do proper install of ValentyUSB.
os.system(
"git clone https://github.com/litex-hub/valentyusb -b hw_cdc_eptri"
)
sys.path.append("valentyusb")
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self,
platform,
sys_clk_freq,
ident="LiteX SoC on Fomu",
ident_version=True,
**kwargs)
# CRG --------------------------------------------------------------------------------------
self.submodules.crg = _CRG(platform, sys_clk_freq)
# 128KB SPRAM (used as SRAM) ---------------------------------------------------------------
self.submodules.spram = Up5kSPRAM(size=128 * kB)
self.bus.add_slave("sram", self.spram.bus, SoCRegion(size=128 * kB))
# SPI Flash --------------------------------------------------------------------------------
self.add_spi_flash(mode="1x", dummy_cycles=8)
# Add ROM linker region --------------------------------------------------------------------
self.bus.add_region(
"rom",
SoCRegion(origin=self.mem_map["spiflash"] + bios_flash_offset,
size=32 * kB,
linker=True))
# Leds -------------------------------------------------------------------------------------
if with_led_chaser:
self.submodules.leds = LedChaser(
pads=platform.request_all("user_led_n"),
sys_clk_freq=sys_clk_freq)
def __init__(self,
bios_flash_offset,
spi_flash_module="AT25SF161",
sys_clk_freq=int(12e6),
with_led_chaser=True,
**kwargs):
kwargs["uart_name"] = "usb_acm" # Enforce UART to USB-ACM
platform = fomu_pvt.Platform()
# Disable Integrated ROM/SRAM since too large for iCE40 and UP5K has specific SPRAM.
kwargs["integrated_sram_size"] = 0
kwargs["integrated_rom_size"] = 0
# Set CPU variant / reset address
kwargs[
"cpu_reset_address"] = self.mem_map["spiflash"] + bios_flash_offset
# Serial -----------------------------------------------------------------------------------
# FIXME: do proper install of ValentyUSB.
os.system(
"git clone https://github.com/litex-hub/valentyusb -b hw_cdc_eptri"
)
sys.path.append("valentyusb")
# SoCCore ----------------------------------------------------------------------------------
SoCCore.__init__(self,
platform,
sys_clk_freq,
ident="LiteX SoC on Fomu",
ident_version=True,
**kwargs)
# CRG --------------------------------------------------------------------------------------
self.submodules.crg = _CRG(platform, sys_clk_freq)
# 128KB SPRAM (used as 64kB SRAM / 64kB RAM) -----------------------------------------------
self.submodules.spram = Up5kSPRAM(size=128 * kB)
self.bus.add_slave("psram", self.spram.bus, SoCRegion(size=128 * kB))
self.bus.add_region(
"sram",
SoCRegion(origin=self.bus.regions["psram"].origin + 0 * kB,
size=64 * kB,
linker=True))
if not self.integrated_main_ram_size:
self.bus.add_region(
"main_ram",
SoCRegion(origin=self.bus.regions["psram"].origin + 64 * kB,
size=64 * kB,
linker=True))
# SPI Flash --------------------------------------------------------------------------------
from litespi.modules import AT25SF161, GD25Q16C, MX25R1635F, W25Q128JV
from litespi.opcodes import SpiNorFlashOpCodes as Codes
# lambdas for lazy module instantiation.
spi_flash_modules = {
"AT25SF161": lambda: AT25SF161(Codes.READ_1_1_4),
"GD25Q16C": lambda: GD25Q16C(Codes.READ_1_1_1),
"MX25R1635F": lambda: MX25R1635F(Codes.READ_1_1_4),
"W25Q128JV": lambda: W25Q128JV(Codes.READ_1_1_4),
}
self.add_spi_flash(mode="4x",
module=spi_flash_modules[spi_flash_module](),
with_master=False)
# Add ROM linker region --------------------------------------------------------------------
self.bus.add_region(
"rom",
SoCRegion(origin=self.mem_map["spiflash"] + bios_flash_offset,
size=32 * kB,
linker=True))
# Leds -------------------------------------------------------------------------------------
if with_led_chaser:
self.submodules.leds = LedChaser(
pads=platform.request_all("user_led_n"),
sys_clk_freq=sys_clk_freq)