mirror of
https://github.com/WangXuan95/FTDI-245fifo-interface.git
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56 lines
2.6 KiB
Python
56 lines
2.6 KiB
Python
#-*- coding:utf-8 -*-
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# Python3
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#
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# This program is a test of FPGA+FTDI USB chips (FT232H, FT600, or FT601)
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# It sends 4 bytes to FTDI chip, and the FPGA will treat these 4 bytes as a length.
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# Then the FPGA sends bytes of length to the computer, and the program should receive these bytes.
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#
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# The corresponding FPGA top-level design can be found in fpga_top_ft232h_tx_mass.v (if you are using FT232H or FT2232H chips)
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# Or see fpga_top_ft600_rx_mass.v (if you are using an FT600 chip)
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#
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from USB_FTX232H_FT60X import USB_FTX232H_FT60X_sync245mode # see USB_FTX232H_FT60X.py
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from random import randint
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import time
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TEST_COUNT = 50
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if __name__ == '__main__':
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usb = USB_FTX232H_FT60X_sync245mode(device_to_open_list =
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(('FTX232H', 'USB <-> Serial Converter' ), # firstly try to open FTX232H (FT232H or FT2232H) device named 'USB <-> Serial Converter'. Note that 'USB <-> Serial Converter' is the default name of FT232H or FT2232H chip unless the user has modified it. If the chip's name has been modified, you can use FT_Prog software to look up it.
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('FT60X' , 'FTDI SuperSpeed-FIFO Bridge')) # secondly try to open FT60X (FT600 or FT601) device named 'FTDI SuperSpeed-FIFO Bridge'. Note that 'FTDI SuperSpeed-FIFO Bridge' is the default name of FT600 or FT601 chip unless the user has modified it.
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)
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total_rx_len = 0
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time_start = time.time()
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for i in range (TEST_COUNT) :
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expect_len = randint(1, 10000000) # random a length
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txdata = bytes( [ expect_len&0xff, (expect_len>>8)&0xff, (expect_len>>16)&0xff, (expect_len>>24)&0xff ] ) # convert length number to a 4-byte byte array (with type of 'bytes')
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usb.send(txdata) # send the 4 bytes to usb
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data = usb.recv(expect_len) # recv from usb
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rx_len = len(data)
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total_rx_len += rx_len
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time_total = time.time() - time_start
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data_rate = total_rx_len / (time_total + 0.001) / 1e3
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print('[%d/%d] rx_len=%d total_rx_len=%d data_rate=%.0f kB/s' % (i+1, TEST_COUNT, rx_len, total_rx_len, data_rate) )
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if expect_len != rx_len :
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print('*** expect_len (%d) and rx_len (%d) mismatch' % (expect_len, rx_len) )
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break
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usb.close()
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