litex/misoclib/com/liteeth/software/wishbone.py

86 lines
2.6 KiB
Python
Raw Normal View History

import socket
from misoclib.tools.litescope.software.driver.reg import *
2015-06-22 18:53:31 -04:00
from misoclib.com.liteeth.test.model.etherbone import *
2015-04-13 07:18:21 -04:00
2015-06-22 18:53:31 -04:00
class LiteEthWishboneBridgeDriver:
def __init__(self, ip_address, udp_port=20000, addrmap=None, busword=8, debug=False):
self.ip_address = ip_address
self.udp_port = udp_port
self.debug = debug
self.tx_sock = None
self.rx_sock = None
if addrmap is not None:
self.regs = build_map(addrmap, busword, self.read, self.write)
def open(self):
self.tx_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.rx_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.rx_sock.bind(("", self.udp_port))
def close(self):
pass
def read(self, addr, burst_length=1):
reads_addrs = [addr+4*j for j in range(burst_length)]
reads = EtherboneReads(base_ret_addr=0x1000, addrs=reads_addrs)
record = EtherboneRecord()
record.writes = None
record.reads = reads
record.bca = 0
record.rca = 0
record.rff = 0
record.cyc = 0
record.wca = 0
record.wff = 0
record.byte_enable = 0xf
record.wcount = 0
record.rcount = len(reads_addrs)
packet = EtherbonePacket()
packet.records = [record]
packet.encode()
self.tx_sock.sendto(bytes(packet), (self.ip_address, self.udp_port))
datas, addrs = self.rx_sock.recvfrom(8192)
packet = EtherbonePacket(datas)
packet.decode()
datas = packet.records.pop().writes.get_datas()
if self.debug:
for i, data in enumerate(datas):
print("RD {:08X} @ {:08X}".format(data, addr + 4*i))
if burst_length == 1:
return datas[0]
else:
return datas
def write(self, addr, datas):
if not isinstance(datas, list):
datas = [datas]
writes_datas = [d for d in datas]
writes = EtherboneWrites(base_addr=addr, datas=writes_datas)
record = EtherboneRecord()
record.writes = writes
record.reads = None
record.bca = 0
record.rca = 0
record.rff = 0
record.cyc = 0
record.wca = 0
record.wff = 0
record.byte_enable = 0xf
record.wcount = len(writes_datas)
record.rcount = 0
packet = EtherbonePacket()
packet.records = [record]
packet.encode()
self.tx_sock.sendto(bytes(packet), (self.ip_address, self.udp_port))
if self.debug:
for i, data in enumerate(datas):
2015-04-13 07:37:46 -04:00
print("WR {:08X} @ {:08X}".format(data, addr + 4*i))