class JPEGTestBench(object):
def __init__(self, dut, debug=True):
self.dut = dut
self.master = OPBMaster(dut, "OPB", dut.CLK)
self.monitor = OutputMonitor(self.dut)
@cocotb.coroutine
def initialise(self):
cocotb.fork(Clock(self.dut.CLK, 100).start())
self.dut.RST = 1
for i in range(10):
yield RisingEdge(self.dut.CLK)
self.dut.RST = 0
yield RisingEdge(self.dut.CLK)
self.dut.log.info("Programming Luminance ROM...")
for index, value in enumerate(ROM_LUM):
yield self.master.write(QUANTIZER_RAM_LUM + index*4, value)
self.dut.log.info("Programming Chrom ROM...")
for index, value in enumerate(ROM_CHROM):
yield self.master.write(QUANTIZER_RAM_CHR + index*4, value)
self.dut.log.info("JPEG Encoder initialised")
@cocotb.coroutine
def encode(self, image):
yield self.master.write(ENC_START_REG, JPEG_RGB | JPEG_ENABLE)
width, height = image.size
pixels = image.load()
yield self.master.write(IMAGE_SIZE_REG, (width<<16) | height)
for y in range(height):
for x in range(width):
r, g, b = pixels[x, y]
self.dut.iram_wdata = ((b<<16) | (g<<8) | r)
self.dut.iram_wren = 1
while True:
yield RisingEdge(self.dut.CLK)
if not int(self.dut.iram_fifo_afull):
break
self.dut.iram_wren = 0
self.dut.log.info("Waiting for encoding to complete")
while True:
result = yield self.master.read(ENC_STS_REG)
if int(result) == JPEG_DONE:
break
def initial_test(dut):
cocotb.fork(Clock(dut.CLK, 100).start())
master = OPBMaster(dut, "OPB", dut.CLK)
dut.RST = 1
for i in range(10):
yield RisingEdge(dut.CLK)
dut.RST = 0
yield RisingEdge(dut.CLK)
dut.log.info("Out of reset")
yield master.read(0)
yield master.write(0, 0xFFFFFFFF)
result = yield master.read(0)
dut.log.info(repr(result))
def __init__(self, dut, debug=True):
self.dut = dut
self.master = OPBMaster(dut, "OPB", dut.CLK)
self.monitor = OutputMonitor(self.dut)
