URL
https://opencores.org/ocsvn/vspi/vspi/trunk
Subversion Repositories vspi
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- This comparison shows the changes necessary to convert path
/
- from Rev 4 to Rev 5
- ↔ Reverse comparison
Rev 4 → Rev 5
/vspi/trunk/scripts/master/spitest.py
0,0 → 1,82
from cheetah_py import * |
from time import * |
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def print_usage(): |
print \ |
""" |
usage: spitest.py PORT |
""" |
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if (len(sys.argv) < 2): |
print_usage() |
sys.exit(1) |
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port = int(sys.argv[1]) |
mode = 2 |
bitrate = 40000 # kbps |
byteCount = 11 # bytes |
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# Open the device |
handle = ch_open(port) |
if (handle <= 0): |
print "Unable to open Cheetah device on port %d" % port |
print "Error code = %d (%s)" % (handle, ch_status_string(handle)) |
sys.exit(1) |
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print "Opened Cheetah device on port %d" % port |
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ch_host_ifce_speed_string = "" |
if (ch_host_ifce_speed(handle)): |
ch_host_ifce_speed_string = "high speed" |
else: |
ch_host_ifce_speed_string = "full speed" |
print "Host interface is %s" % ch_host_ifce_speed_string |
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# Ensure that SPI subsystem is configured |
ch_spi_configure(handle, (mode >> 1), mode & 1, CH_SPI_BITORDER_MSB, 0x0) |
print "SPI configuration set to mode %d, MSB shift, SS[2:0] active low" % mode |
sys.stdout.flush() |
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# Set the bitrate |
bitrate = ch_spi_bitrate(handle, bitrate) |
print "Bitrate set to %d kHz" % bitrate |
sys.stdout.flush() |
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# Create 4KB of fake data so we can exchange it for real data |
data_in = array('B', [0 for i in range(byteCount)]) |
ch_spi_queue_clear(handle) |
ch_spi_queue_oe(handle, 1) |
#ch_spi_queue_byte(handle, 1, 0x00) # Send an empty byte, pre SS low |
ch_spi_queue_ss(handle, 0x1) |
#ch_spi_queue_byte(handle, 1, 0x02) # Send to MOSI buffer |
#ch_spi_queue_byte(handle, 3, 0x00) # Sending 4 bytes |
#ch_spi_queue_byte(handle, 1, 0x04) |
#ch_spi_queue_byte(handle, 1, 0xFF) # Sending byte: 1111_1111 |
#ch_spi_queue_byte(handle, 1, 0xF0) # Sending byte: 1111_0000 |
#ch_spi_queue_byte(handle, 1, 0x33) # Sending byte: 0011_0011 |
ch_spi_queue_byte(handle, 1, 42) # Sending byte: 0101_0101 |
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#ch_spi_queue_byte(handle, 1, 0x55) # Test byte |
#ch_spi_queue_byte(handle, 1, 0x66) |
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ch_spi_queue_ss(handle, 0) |
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#ch_spi_queue_byte(handle, 1, 0x00) # Send an empty byte, SS high |
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(actualByteCount, data_in) = ch_spi_batch_shift(handle, byteCount) |
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#if (actualByteCount < 0): |
# print "error: %s" % ch_status_string(count) |
#elif (actualByteCount != byteCount): |
# print "error: read %d bytes (expected %d)" % (actualByteCount, byteCount) |
#else: |
for i in range(actualByteCount): |
sys.stdout.write("%d " % data_in[i]) |
sys.stdout.write("\n") |
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# Close and exit |
ch_close(handle) |
sys.exit(0) |
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