litex/test/bist.py

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import time
import argparse
from config import *
sector_size = 512
class SATABISTDriver:
def __init__(self, regs):
self.regs = regs
self.last_sector = 0
self.last_time = time.time()
self.last_errors = 0
self.mode = "rw"
def set_mode(self, mode):
self.mode = mode
self.regs.bist_write_only.write(0)
self.regs.bist_read_only.write(0)
if mode == "wr":
self.regs.bist_write_only.write(1)
if mode == "rd":
self.regs.bist_read_only.write(1)
def start(self, sector, count, mode):
self.set_mode(mode)
self.regs.bist_start_sector.write(sector)
self.regs.bist_count.write(count)
self.regs.bist_stop.write(0)
self.regs.bist_start.write(1)
def stop(self):
self.regs.bist_stop.write(1)
def show_status(self):
errors = self.regs.bist_errors.read() - self.last_errors
self.last_errors += errors
sector = self.regs.bist_sector.read()
n = sector - self.last_sector
self.last_sector = sector
t = self.last_time - time.time()
self.last_time = time.time()
if self.mode in ["wr", "rd"]:
speed_mult = 1
else:
speed_mult = 2
print("%4.2f MB/sec errors=%d sector=%d" %(n*sector_size*speed_mult/(1024*1024), errors, sector))
def _get_args():
parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter,
description="""\
SATA BIST utility.
""")
parser.add_argument("-s", "--sector", default=0, help="BIST start sector")
parser.add_argument("-c", "--count", default=4, help="BIST count (number of sectors per transaction)")
parser.add_argument("-m", "--mode", default="rw", help="BIST mode (rw, wr, rd")
return parser.parse_args()
if __name__ == "__main__":
args = _get_args()
wb.open()
###
bist = SATABISTDriver(wb.regs)
try:
bist.start(int(args.sector), int(args.count), args.mode)
while True:
bist.show_status()
time.sleep(1)
except KeyboardInterrupt:
pass
bist.stop()
###
wb.close()