def mkLed(baudrate=19200, clockfreq=100 * 1000 * 1000):
m = Module('blinkled')
clk = m.Input('CLK')
rst = m.Input('RST')
sw = m.Input('sw', 16)
led = m.OutputReg('led', 16, initval=0)
tx = m.Output('utx')
rx = m.Input('urx')
uart_tx = vthread.UartTx(m, 'inst_tx', 'tx_', clk, rst, tx,
baudrate=baudrate, clockfreq=clockfreq)
uart_rx = vthread.UartRx(m, 'inst_rx', 'rx_', clk, rst, rx,
baudrate=baudrate, clockfreq=clockfreq)
def blink():
while True:
c = uart_rx.recv()
data = c + sw
led.value = data
uart_tx.send(data)
th = vthread.Thread(m, 'th_blink', clk, rst, blink)
fsm = th.start()
return m
def mkTest(baudrate=19200, clockfreq=19200 * 10):
m = Module('test')
# target instance
led = mkLed(baudrate, clockfreq)
uut = Submodule(m, led, name='uut', prefix='', as_wire=('utx', 'urx'))
clk = uut['CLK']
rst = uut['RST']
tx = uut['utx']
rx = uut['urx']
sw = uut['sw']
uart_tx = vthread.UartTx(m,
'inst_tx',
'tx_',
clk,
rst,
as_wire='txd',
baudrate=baudrate,
clockfreq=clockfreq)
uart_rx = vthread.UartRx(m,
'inst_rx',
'rx_',
clk,
rst,
as_wire='rxd',
baudrate=baudrate,
clockfreq=clockfreq)
txd = uart_tx['txd']
rxd = uart_rx['rxd']
rx.assign(txd)
rxd.assign(tx)
simulation.setup_waveform(m, uut, uart_tx, uart_rx)
simulation.setup_clock(m, clk, hperiod=5)
init = simulation.setup_reset(m, rst, m.make_reset(), period=100)
init.add(sw(10), Delay(100000), Systask('finish'))
def test():
for i in range(10):
s = 100 + i
uart_tx.send(s)
r = uart_rx.recv()
if vthread.verilog.Eql(r, s + sw):
print('OK: %d + %d === %d' % (s, sw, r))
else:
print('NG: %d + %d !== %d' % (s, sw, r))
th = vthread.Thread(m, 'test', clk, rst, test)
th.start()
return m