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authorJoachim StroĢˆmbergson <joachim@secworks.se>2014-05-09 13:16:27 +0200
committerJoachim StroĢˆmbergson <joachim@secworks.se>2014-05-09 13:16:27 +0200
commitf4ac04ef45e7e287a28a08c1db7be5dca854bd7e (patch)
tree2c1926f26f2637989caa54ecb7c7c542d92f72ea /src
parent754458f63b44424b70dc0a245922cc45f0f0109b (diff)
Added functionality to change baud rate. Decreased comm delay. Now test cases goes much faster.
Diffstat (limited to 'src')
-rwxr-xr-xsrc/sw/hash_tester.py25
1 files changed, 24 insertions, 1 deletions
diff --git a/src/sw/hash_tester.py b/src/sw/hash_tester.py
index c9da8ed..472a6df 100755
--- a/src/sw/hash_tester.py
+++ b/src/sw/hash_tester.py
@@ -65,6 +65,11 @@ import hashlib
# CONFIGURE YOUR DEVICE HERE!
SERIAL_DEVICE = '/dev/cu.usbserial-A801SA6T'
BAUD_RATE = 9600
+BIT_RATE = int(50E6 / BAUD_RATE)
+
+BAUD_RATE2 = 256000
+BIT_RATE2 = int(50E6 / BAUD_RATE2)
+
DATA_BITS = 8
STOP_BITS = 1
@@ -74,7 +79,7 @@ VERBOSE = False
# Delay times we wait
PROC_DELAY_TIME = 0.0001
-COMM_DELAY_TIME = 0.05
+COMM_DELAY_TIME = 0.005
# Memory map.
SOC = '\x55'
@@ -83,6 +88,9 @@ READ_CMD = '\x10'
WRITE_CMD = '\x11'
UART_ADDR_PREFIX = '\x00'
+UART_ADDR_BIT_RATE = '\x10'
+UART_ADDR_DATA_BITS = '\x11'
+UART_ADDR_STOP_BITS = '\x12'
SHA1_ADDR_PREFIX = '\x10'
SHA1_ADDR_NAME0 = '\x00'
@@ -957,6 +965,20 @@ def main():
print "Error: Can't open serial device."
sys.exit(1)
+ # Try and switch baud rate in the FPGA and then here.
+ bit_rate_high = chr((BIT_RATE2 >> 8) & 0xff)
+ bit_rate_low = chr(BIT_RATE2 & 0xff)
+
+ if VERBOSE:
+ print("Changing to new baud rate.")
+ print("Baud rate: %d" % BAUD_RATE2)
+ print("Bit rate high byte: 0x%02x" % ord(bit_rate_high))
+ print("Bit rate low byte: 0x%02x" % ord(bit_rate_low))
+
+ write_serial_bytes([SOC, WRITE_CMD, UART_ADDR_PREFIX, UART_ADDR_BIT_RATE,
+ '\x00', '\x00', bit_rate_high, bit_rate_low, EOC], ser)
+ ser.baudrate=BAUD_RATE2
+
try:
my_thread = threading.Thread(target=read_serial_thread, args=(ser,))
except:
@@ -975,6 +997,7 @@ def main():
test_case(ser)
# Exit nicely.
+ time.sleep(50 * COMM_DELAY_TIME)
if VERBOSE:
print "Done. Closing device."
ser.close()