if __name__ == '__main__':
s = SPIDriver(sys.argv[1])
t1 = time.time() + float(sys.argv[2])
i = 0
random.seed(7)
while time.time() < t1:
expected = s.ccitt_crc
s.unsel()
l = 1 + rnd(100)
db = [rnd(256) for j in range(l)]
s.write(db)
expected = crc16xmodem(db, expected)
s.unsel()
db = [rnd(256) for j in range(64)]
r = list(array.array('B', s.writeread(db)))
expected = crc16xmodem(db, expected)
expected = crc16xmodem(r, expected)
s.getstatus()
print("expected=%04x actual=%04x" % (expected, s.ccitt_crc))
assert expected == s.ccitt_crc, "pass %d with %d bytes %s, expected=%04x actual=%04x" % (
i, len(db), list(db), expected, s.ccitt_crc)
i += 1
for i in range(20):
s.seta(0)
s.setb(0)
s.seta(1)
s.setb(1)
class Frame(wx.Frame):
def __init__(self):
self.sd = None
def widepair(a, b):
r = wx.BoxSizer(wx.HORIZONTAL)
r.Add(a, 1, wx.LEFT)
r.AddStretchSpacer(prop=1)
r.Add(b, 1, wx.RIGHT)
return r
def pair(a, b):
r = wx.BoxSizer(wx.HORIZONTAL)
r.Add(a, 1, wx.LEFT)
r.Add(b, 0, wx.RIGHT)
return r
def rpair(a, b):
r = wx.BoxSizer(wx.HORIZONTAL)
r.Add(a, 0, wx.LEFT)
r.Add(b, 1, wx.RIGHT)
return r
def label(s):
return wx.StaticText(self, label = s)
def hbox(items):
r = wx.BoxSizer(wx.HORIZONTAL)
[r.Add(i, 0, wx.EXPAND) for i in items]
return r
def hcenter(i):
r = wx.BoxSizer(wx.HORIZONTAL)
r.AddStretchSpacer(prop=1)
r.Add(i, 2, wx.CENTER)
r.AddStretchSpacer(prop=1)
return r
def vbox(items):
r = wx.BoxSizer(wx.VERTICAL)
[r.Add(i, 0, wx.EXPAND) for i in items]
return r
wx.Frame.__init__(self, None, -1, "SPIDriver")
self.label_serial = wx.StaticText(self, label = "-", style = wx.ALIGN_RIGHT)
self.label_voltage = wx.StaticText(self, label = "-", style = wx.ALIGN_RIGHT)
self.label_current = wx.StaticText(self, label = "-", style = wx.ALIGN_RIGHT)
self.label_temp = wx.StaticText(self, label = "-", style = wx.ALIGN_RIGHT)
self.label_uptime = wx.StaticText(self, label = "-", style = wx.ALIGN_RIGHT)
self.Bind(EVT_PING, self.refresh)
self.ckCS = wx.CheckBox(self, label = "CS")
self.ckA = wx.CheckBox(self, label = "A")
self.ckB = wx.CheckBox(self, label = "B")
self.ckCS.Bind(wx.EVT_CHECKBOX, self.check_cs)
self.ckA.Bind(wx.EVT_CHECKBOX, self.check_a)
self.ckB.Bind(wx.EVT_CHECKBOX, self.check_b)
ps = self.GetFont().GetPointSize()
fmodern = wx.Font(ps, wx.MODERN, wx.FONTSTYLE_NORMAL, wx.FONTWEIGHT_NORMAL)
def logger():
r = wx.TextCtrl(self, style=wx.TE_READONLY | wx.TE_RIGHT | wx.TE_DONTWRAP)
r.SetBackgroundColour(wx.Colour(224, 224, 224))
r.SetFont(fmodern)
return r
self.txMISO = logger()
self.txMOSI = logger()
self.txVal = HexTextCtrl(self, size=wx.DefaultSize, style=0)
self.txVal.SetMaxLength(2)
self.txVal.SetFont(wx.Font(14 * ps // 10,
wx.MODERN,
wx.FONTSTYLE_NORMAL,
wx.FONTWEIGHT_BOLD))
txButton = wx.Button(self, label = "Transfer")
txButton.Bind(wx.EVT_BUTTON, partial(self.transfer, self.txVal))
txButton.SetDefault()
self.allw = [self.ckCS, self.ckA, self.ckB, self.txVal, txButton, self.txMISO, self.txMOSI]
[w.Enable(False) for w in self.allw]
self.devs = self.devices()
cb = wx.ComboBox(self, choices = sorted(self.devs.keys()), style = wx.CB_READONLY)
cb.Bind(wx.EVT_COMBOBOX, self.choose_device)
vb = vbox([
label(""),
hcenter(cb),
label(""),
hcenter(pair(
vbox([
label("Serial"),
label("Voltage"),
label("Current"),
label("Temp."),
label("Running"),
]),
vbox([
self.label_serial,
self.label_voltage,
self.label_current,
self.label_temp,
self.label_uptime,
])
)),
label(""),
rpair(label("MISO"), self.txMISO),
rpair(label("MOSI"), self.txMOSI),
label(""),
hcenter(pair(self.ckCS, hbox([self.ckA, self.ckB]))),
label(""),
hcenter(pair(self.txVal, txButton)),
label(""),
])
self.SetSizerAndFit(vb)
self.SetAutoLayout(True)
if len(self.devs) > 0:
d1 = min(self.devs)
self.connect(self.devs[d1])
cb.SetValue(d1)
t = threading.Thread(target=ping_thr, args=(self, ))
t.setDaemon(True)
t.start()
def devices(self):
if sys.platform == 'darwin':
devdir = "/dev/"
pattern = "^tty.usbserial-(........)"
else:
devdir = "/dev/serial/by-id/"
pattern = "^usb-FTDI_FT230X_Basic_UART_(........)-"
if not os.access(devdir, os.R_OK):
return {}
devs = os.listdir(devdir)
def filter(d):
m = re.match(pattern, d)
if m:
return (m.group(1), devdir + d)
seldev = [filter(d) for d in devs]
return dict([d for d in seldev if d])
def connect(self, dev):
self.sd = SPIDriver(dev)
[w.Enable(True) for w in self.allw]
self.ckCS.SetValue(not self.sd.cs)
self.ckA.SetValue(self.sd.a)
self.ckB.SetValue(self.sd.b)
self.refresh(None)
def refresh(self, e):
if self.sd:
self.sd.getstatus()
self.label_serial.SetLabel(self.sd.serial)
self.label_voltage.SetLabel("%.2f V" % self.sd.voltage)
self.label_current.SetLabel("%d mA" % self.sd.current)
self.label_temp.SetLabel("%.1f C" % self.sd.temp)
days = self.sd.uptime // (24 * 3600)
rem = self.sd.uptime % (24 * 3600)
hh = rem // 3600
mm = (rem / 60) % 60
ss = rem % 60;
self.label_uptime.SetLabel("%d:%02d:%02d:%02d" % (days, hh, mm, ss))
def choose_device(self, e):
self.connect(self.devs[e.EventObject.GetValue()])
def check_cs(self, e):
if e.EventObject.GetValue():
self.sd.sel()
else:
self.sd.unsel()
def check_a(self, e):
self.sd.seta(e.EventObject.GetValue())
def check_b(self, e):
self.sd.setb(e.EventObject.GetValue())
def transfer(self, htc, e):
if htc.GetValue():
txb = int(htc.GetValue(), 16)
rxb = struct.unpack("B", self.sd.writeread(struct.pack("B", txb)))[0]
self.txMOSI.AppendText(" %02X" % txb)
self.txMISO.AppendText(" %02X" % rxb)
htc.ChangeValue("")
return [rnd(256) for i in range(n)]
if __name__ == '__main__':
if len(sys.argv) > 1:
s = SPIDriver(sys.argv[1])
else:
s = SPIDriver()
# print(s)
# t1 = time.time() + float(sys.argv[2])
while True: # time.time() < t1:
for i in range(50):
random.choice([
lambda: s.seta(rnd(2)),
lambda: s.setb(rnd(2)),
lambda: s.sel(),
lambda: s.unsel(),
lambda: s.writeread(pattern(1 + rnd(1))),
# lambda: s.read(1 + rnd(12)),
# lambda: s.getstatus()
])()
os.system("outlet.py 8 on ; outlet.py 8 off")
time.sleep(3)
print(hex(s.debug))
while 0:
s.sel()
s.write(b'ABCDEF')
s.unsel()
time.sleep(.050)
class SPIDriverWindow(Gtk.Window):
def __init__(self):
Gtk.Window.__init__(self, title="SPIDriver")
self.set_border_width(10)
self.sd = SPIDriver()
def pair(a, b):
r = Gtk.HBox(spacing=6)
r.pack_start(a, False, True, 0)
r.pack_end(b, False, True, 0)
return r
def label(s):
r = Gtk.Label()
r.set_text(s)
return r
def vbox(items):
r = Gtk.VBox(spacing=6)
[r.pack_start(i, True, True, 0) for i in items]
return r
def hbox(items):
r = Gtk.HBox(spacing=6)
[r.pack_start(i, False, True, 0) for i in items]
return r
def checkbutton(name, state, click):
r = Gtk.CheckButton(name)
r.set_active(state)
r.connect("clicked", click)
return r
def button(name, click):
r = Gtk.Button(name)
r.connect("clicked", click)
return r
self.label_voltage = Gtk.Label()
self.label_current = Gtk.Label()
self.label_temp = Gtk.Label()
self.tx = Gtk.Entry()
self.tx.set_width_chars(20)
self.tx.connect('changed', self.edit)
self.rx = Gtk.Entry()
self.rx.set_width_chars(20)
self.rx.connect('button-press-event', lambda a, b: True)
self.rx.set_property('editable', False)
self.button_send = button("Send", self.send)
self.button_send.set_sensitive(False)
self.add(
vbox([
pair(label("Voltage"), self.label_voltage),
pair(label("Current"), self.label_current),
pair(label("Temp"), self.label_temp),
Gtk.Separator(orientation=Gtk.Orientation.HORIZONTAL),
hbox([
checkbutton("CS", 1 - self.sd.cs, self.click_cs),
checkbutton("A", self.sd.a, self.click_a),
checkbutton("B", self.sd.b, self.click_b),
]),
pair(self.tx, self.button_send),
pair(self.rx, button("Recv", self.recv)),
]))
self.refresh()
GLib.timeout_add(1000, self.refresh)
def refresh(self):
self.sd.getstatus()
self.label_voltage.set_text("%.2f V" % self.sd.voltage)
self.label_current.set_text("%d mA" % self.sd.current)
self.label_temp.set_text("%.1f C" % self.sd.temp)
return True
def click_cs(self, button):
[self.sd.unsel, self.sd.sel][ison(button)]()
def click_a(self, button):
self.sd.seta(ison(button))
def click_b(self, button):
self.sd.setb(ison(button))
def edit(self, _):
b = self.tx.get_buffer()
valid = all([ishex(w) for w in b.get_text().split()])
self.button_send.set_sensitive(valid)
def transfer(self, byte):
byte = struct.unpack("B", self.sd.writeread(struct.pack("B", byte)))[0]
txb = self.tx.get_buffer()
txb.delete_text(0, -1)
rxb = self.rx.get_buffer()
rxb.set_text(rxb.get_text()[-17:] + " %02x" % byte, -1)
def send(self, _):
b = self.tx.get_buffer()
for w in b.get_text().split():
self.transfer(int(w, 16))
def recv(self, _):
self.transfer(0xff)
class SpiDriverGui:
"""
Setup main GUI window.
Main windows is a grid/table of widgets.
Data variable is attached to each tkinter widget e.g., self.ser_num.var.set('blah')
on_refresh_gui() will typically update each field.
"""
def __init__(self):
self.spi_driver = None # none yet.
self.grid = tkinter.Tk() # Root window is used as a grid or table.
self.grid.configure(padx=8, pady=8) # add padding around grid.
self.grid.title(os.path.basename(__file__)) # Display filename in title bar.
# region Compose GUI widgets.
row = 0 # row counter, used to add widgets to grid.
# region COM port combo.
tkinter.Label(self.grid, text='Port').grid(row=row, column=0)
comports = [port.device for port in serial.tools.list_ports.comports()]
self.port_combo = tkinter.ttk.Combobox(self.grid, values=comports, width=10)
self.port_combo.grid(row=row, column=1)
self.port_prev = None
if len(comports) > 0:
self.port_combo.current(len(comports)-1) # Select last entry.
row += 1
# endregion COM port combo.
# region Diagnostic fields
def create_display_parameter(str_name, row) -> tkinter.Entry:
lbl = tkinter.Label(self.grid, text=str_name)
lbl.grid(row=row, column=0)
string_var = tkinter.StringVar()
field = tkinter.Entry(self.grid, textvariable=string_var, state="readonly", width=12)
field.grid(row=row, column=1)
field.var = string_var # Bind the var to the Entry.
return field
self.ser_num = create_display_parameter('Serial', row); row += 1
self.voltage = create_display_parameter('Voltage', row); row += 1
self.current = create_display_parameter('Current', row); row += 1
self.deg_c = create_display_parameter('Temp', row); row += 1
self.uptime = create_display_parameter('Uptime', row); row += 1
self.miso = create_display_parameter('MISO', row); row += 1
self.mosi = create_display_parameter('MOSI', row); row += 1
# endregion Diagnostic fields
# region 3 checkboxes
# Add three checkboxes to the same row in the table.
# nCS is inverted (active low)
chk_frame = tkinter.Frame(self.grid)
v = tkinter.IntVar(); self.chk_ncs = tkinter.Checkbutton(chk_frame, text="nCS", variable=v, command=self.on_chk_ncs ); self.chk_ncs.pack(side=tkinter.LEFT); self.chk_ncs.var = v
v = tkinter.IntVar(); self.chk_a = tkinter.Checkbutton(chk_frame, text="A", variable=v, command=self.on_chk_a ); self.chk_a.pack(side=tkinter.LEFT); self.chk_a.var = v
v = tkinter.IntVar(); self.chk_b = tkinter.Checkbutton(chk_frame, text="B", variable=v, command=self.on_chk_b ); self.chk_b.pack(side=tkinter.LEFT); self.chk_b.var = v
chk_frame.grid(row=row, column=0, columnspan=2);
row += 1
# endregion 3 checkboxes
tkinter.Label(self.grid, text='Send bytes').grid(row=row, column=0)
v = tkinter.StringVar()
self.send_bytes = tkinter.Entry(self.grid, textvariable=v, width=12)
self.send_bytes.grid(row=row, column=1)
self.send_bytes.var = v
v.set('12 AB')
row += 1
self.btn_send = tkinter.Button(self.grid, text='Transfer', command = self.on_transfer); self.btn_send.grid(row=row, column=1)
#endregion Compose GUI widgets.
self.grid.after(500, self.on_refresh_gui) # Establish a refresh routine.
self.grid.mainloop() # launch GUI.
#region Event handlers (typically start with 'on_').
def on_chk_a(self):
self.spi_driver.seta(self.chk_a.var.get())
def on_chk_b(self):
self.spi_driver.setb(self.chk_b.var.get())
def on_chk_ncs(self):
self.spi_driver.sel() if self.chk_ncs.var.get() else self.spi_driver.unsel()
'''
Main refresh function used to update GUI widgets.
Called periodically using 'tkinter.after()'
'''
def on_refresh_gui(self):
self.grid.after(500, self.on_refresh_gui)
if self.port_prev != self.port_combo.get():
self.spi_driver = None
self.port_prev = self.port_combo.get()
if len(self.port_prev) > 0:
try:
self.spi_driver = SPIDriver(self.port_prev)
except serial.serialutil.SerialException:
pass
if self.spi_driver is not None:
self.spi_driver.getstatus()
self.ser_num.var.set(self.spi_driver.serial)
self.voltage.var.set("{0:.1f} V".format(self.spi_driver.voltage))
self.current.var.set("{0:.1f} mA".format(self.spi_driver.current))
self.deg_c.var.set("{0:.1f} °C".format(self.spi_driver.temp))
self.uptime.var.set(str(datetime.timedelta(seconds=self.spi_driver.uptime))) # https://stackoverflow.com/a/775095/101252
self.chk_ncs.var.set(not self.spi_driver.cs)
self.chk_a.var.set(self.spi_driver.a)
self.chk_b.var.set(self.spi_driver.b)
return
else:
self.ser_num.var.set('')
self.voltage.var.set('')
self.current.var.set('')
self.deg_c.var.set('')
self.uptime.var.set('')
self.chk_ncs.var.set(2)
self.chk_a.var.set(2)
self.chk_b.var.set(2)
self.miso.var.set('')
self.mosi.var.set('')
"""
Exchange MOSI & MISO data with SPI Driver hardware using writeread().
"""
def on_transfer(self):
# bytearray.fromhex will accept spaces between bytes.
# hexlify will create a string with a hexadecimal representation of the byte array.
tx = bytearray.fromhex(self.send_bytes.var.get())
self.mosi.var.set(binascii.hexlify(tx))
rx = self.spi_driver.writeread(tx)
self.miso.var.set(binascii.hexlify(rx))