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spicmds: Rework SPI message transmission

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Improve the SPI message transmit system.  Add support for bus speed
and bus mode.  Add support for sending SPI messages on shutdown.

Signed-off-by: Petri Honkala <cruwaller@gmail.com>
Signed-off-by: Douglas Hammond <wizhippo@gmail.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-05-04 12:27:52 -04:00
parent 838da992e8
commit 22487d95e9
7 changed files with 244 additions and 45 deletions
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23
klippy/extras/ad5206.py
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@ -11,21 +11,24 @@ class ad5206:
enable_pin_params = ppins.lookup_pin('digital_out', enable_pin)
if enable_pin_params['invert']:
raise ppins.error("ad5206 can not invert pin")
self.mcu = enable_pin_params['chip']
self.pin = enable_pin_params['pin']
self.mcu.add_config_object(self)
mcu = enable_pin_params['chip']
pin = enable_pin_params['pin']
scale = config.getfloat('scale', 1., above=0.)
self.channels = [None] * 6
for i in range(len(self.channels)):
channels = [None]*6
for i in range(len(channels)):
val = config.getfloat('channel_%d' % (i+1,), None,
minval=0., maxval=scale)
if val is not None:
self.channels[i] = int(val * 256. / scale + .5)
def build_config(self):
for i, val in enumerate(self.channels):
channels[i] = int(val * 256. / scale + .5)
oid = mcu.create_oid()
mcu.add_config_cmd(
"config_spi oid=%d bus=%d pin=%s mode=%u rate=%u shutdown_msg=" % (
oid, 0, pin, 0, 25000000))
for i, val in enumerate(channels):
if val is not None:
self.mcu.add_config_cmd(
"send_spi_message pin=%s msg=%02x%02x" % (self.pin, i, val))
mcu.add_config_cmd(
"spi_send oid=%d data=%02x%02x" % (oid, i, val),
is_init=True)
def load_config_prefix(config):
return ad5206(config)