File size: 1,674 Bytes
7df9186 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | class spi_mon_prog:
def __init__(self, IMEM=512, RMEM=128):
'''IMEM and RMEM must match hardware configuration'''
self.IMEM = IMEM
self.RMEM = RMEM
self.MAX_CMD = (IMEM-1) // 5 # Reserve one byte for end-of-stream marker
def gen(self, cmd_arr, verbose=False):
'''cmd_arr is array of tuples: (hw_sel, rnw, command[31:0])'''
l_cmd = len(cmd_arr)
if l_cmd > self.MAX_CMD:
print("spi_mon: SPI commands (%d) exceed instruction memory size" % l_cmd)
return []
imem_a = []
rcnt = 0
for c in cmd_arr:
sel, rnw, cmd = c[0] & 0xF, c[1] & 0x1, c[2] & 0xFFFFFFFF
opt = 0 | sel << 1 | rnw
imem_a += [opt]
rcnt += rnw
imem_a += [0xFF & cmd >> (24-x*8) for x in range(4)] # Break into big-endian bytes
# Append end-of-stream
imem_a += [1 << 5]
if verbose:
print("spi_mon: %d/%d instructions, %d return values" % (l_cmd, self.MAX_CMD, rcnt))
# Pad stream up to IMEM
imem_a += [0]*(self.IMEM - len(imem_a))
return imem_a
if __name__ == "__main__":
""" spi_mon_prog usage demo """
cmd_arr = [(0, 0, 0x00000A01),
(0, 1, 0xFFFFFF01),
(0, 0, 0x00000B02),
(0, 1, 0xFFFFFF02),
(1, 0, 0x00000A01),
(1, 0, 0xA0A0A005),
(1, 0, 0xB0B0B009),
(1, 1, 0xFFFFFF03),
(1, 1, 0xFFFFFF04),
(1, 1, 0xFFFFFF05)]
sprog = spi_mon_prog()
imem = sprog.gen(cmd_arr, verbose=False)
for i in imem:
print("%02x" % i)
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