mirror of https://github.com/Desuuuu/klipper.git
spi_software: Implementation of software spi
Signed-off-by: Matt Janus <FragginRight@variabl.es> Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
parent
090cd930d9
commit
98ed462865
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@ -680,6 +680,13 @@
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# The pin corresponding to the AD5206 chip select line. This pin
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# The pin corresponding to the AD5206 chip select line. This pin
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# will be set to low at the start of SPI messages and raised to high
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# will be set to low at the start of SPI messages and raised to high
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# after the message completes. This parameter must be provided.
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# after the message completes. This parameter must be provided.
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#spi_bus:
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#spi_speed:
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#spi_software_sclk_pin:
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#spi_software_mosi_pin:
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#spi_software_miso_pin:
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# These optional parameters allow one to customize the SPI settings
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# used to communicate with the chip.
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#channel_1:
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#channel_1:
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#channel_2:
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#channel_2:
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#channel_3:
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#channel_3:
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@ -787,6 +794,13 @@
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# The pin corresponding to the TMC2130 chip select line. This pin
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# The pin corresponding to the TMC2130 chip select line. This pin
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# will be set to low at the start of SPI messages and raised to high
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# will be set to low at the start of SPI messages and raised to high
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# after the message completes. This parameter must be provided.
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# after the message completes. This parameter must be provided.
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#spi_bus:
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#spi_speed:
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#spi_software_sclk_pin:
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#spi_software_mosi_pin:
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#spi_software_miso_pin:
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# These optional parameters allow one to customize the SPI settings
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# used to communicate with the chip.
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#microsteps:
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#microsteps:
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# The number of microsteps to configure the driver to use. Valid
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# The number of microsteps to configure the driver to use. Valid
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# values are 1, 2, 4, 8, 16, 32, 64, 128, 256. This parameter must
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# values are 1, 2, 4, 8, 16, 32, 64, 128, 256. This parameter must
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@ -908,6 +922,11 @@
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#spi_speed: 2000000
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#spi_speed: 2000000
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# SPI bus frequency used to communicate with the TMC2660 stepper
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# SPI bus frequency used to communicate with the TMC2660 stepper
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# driver. The default is 2000000.
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# driver. The default is 2000000.
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#spi_software_sclk_pin:
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#spi_software_mosi_pin:
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#spi_software_miso_pin:
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# These optional parameters allow one to customize the SPI settings
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# used to communicate with the chip.
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#microsteps:
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#microsteps:
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# The number of microsteps to configure the driver to use. Valid
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# The number of microsteps to configure the driver to use. Valid
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# values are 1, 2, 4, 8, 16, 32, 64, 128, 256. This parameter must
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# values are 1, 2, 4, 8, 16, 32, 64, 128, 256. This parameter must
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@ -1043,8 +1062,15 @@
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# provided when using an uc1701 display.
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# provided when using an uc1701 display.
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#cs_pin:
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#cs_pin:
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#dc_pin:
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#dc_pin:
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#spi_bus:
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#spi_speed:
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#spi_software_sclk_pin:
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#spi_software_mosi_pin:
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#spi_software_miso_pin:
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# The pins connected to an ssd1306 type lcd when in "4-wire" spi
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# The pins connected to an ssd1306 type lcd when in "4-wire" spi
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# mode. The default is to use i2c mode for ssd1306 displays.
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# mode. The parameters that start with "spi_" are optional and they
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# control the spi settings used to communicate with the chip. The
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# default is to use i2c mode for ssd1306 displays.
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#menu_root:
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#menu_root:
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# Entry point for menu, root menu container name. If this parameter
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# Entry point for menu, root menu container name. If this parameter
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# is not provided then default menu root is used. When provided
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# is not provided then default menu root is used. When provided
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@ -1140,6 +1166,12 @@
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#spi_speed: 4000000
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#spi_speed: 4000000
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# The SPI speed (in hz) to use when communicating with the chip.
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# The SPI speed (in hz) to use when communicating with the chip.
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# The default is 4000000.
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# The default is 4000000.
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#spi_bus:
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#spi_software_sclk_pin:
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#spi_software_mosi_pin:
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#spi_software_miso_pin:
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# These optional parameters allow one to customize the SPI settings
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# used to communicate with the chip.
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#sensor_pin:
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#sensor_pin:
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# The chip select line for the sensor chip. This parameter must be
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# The chip select line for the sensor chip. This parameter must be
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# provided.
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# provided.
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@ -12,22 +12,33 @@ import mcu
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# Helper code for working with devices connected to an MCU via an SPI bus
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# Helper code for working with devices connected to an MCU via an SPI bus
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class MCU_SPI:
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class MCU_SPI:
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def __init__(self, mcu, bus, pin, mode, speed, shutdown_seq):
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def __init__(self, mcu, bus, pin, mode, speed, shutdown_seq, sw_pins=None):
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self.mcu = mcu
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self.mcu = mcu
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shutdown_msg = "".join(["%02x" % (x,) for x in shutdown_seq])
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shutdown_msg = "".join(["%02x" % (x,) for x in shutdown_seq])
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self.oid = self.mcu.create_oid()
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self.oid = self.mcu.create_oid()
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if pin is None:
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if pin is not None:
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self.config_msg = (
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"config_spi_without_cs oid=%d bus=%d mode=%d rate=%d"
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" shutdown_msg=%s" % (
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self.oid, bus, mode, speed, shutdown_msg))
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else:
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# Set all CS pins high before first config_spi
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# Set all CS pins high before first config_spi
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self.mcu.add_config_cmd("set_digital_out pin=%s value=1" % (pin,))
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self.mcu.add_config_cmd("set_digital_out pin=%s value=1" % (pin,))
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self.config_msg = (
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if sw_pins is not None:
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software_spi_oid = self.mcu.create_oid()
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self.config_msgs = [
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"config_software_spi oid=%d sclk_pin=%s mosi_pin=%s miso_pin=%s"
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" mode=%d rate=%d" % (
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software_spi_oid, sw_pins[0], sw_pins[1], sw_pins[2],
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mode, speed),
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"config_spi_from_software oid=%d sw_oid=%d pin=%s"
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" shutdown_msg=%s" % (
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self.oid, software_spi_oid, pin, shutdown_msg)]
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elif pin is None:
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self.config_msgs = [
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"config_spi_without_cs oid=%d bus=%d mode=%d rate=%d"
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" shutdown_msg=%s" % (
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self.oid, bus, mode, speed, shutdown_msg)]
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else:
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self.config_msgs = [
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"config_spi oid=%d bus=%d pin=%s mode=%d rate=%d"
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"config_spi oid=%d bus=%d pin=%s mode=%d rate=%d"
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" shutdown_msg=%s" % (
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" shutdown_msg=%s" % (
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self.oid, bus, pin, mode, speed, shutdown_msg))
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self.oid, bus, pin, mode, speed, shutdown_msg)]
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self.cmd_queue = self.mcu.alloc_command_queue()
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self.cmd_queue = self.mcu.alloc_command_queue()
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self.mcu.register_config_callback(self.build_config)
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self.mcu.register_config_callback(self.build_config)
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self.spi_send_cmd = self.spi_transfer_cmd = None
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self.spi_send_cmd = self.spi_transfer_cmd = None
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@ -38,7 +49,8 @@ class MCU_SPI:
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def get_command_queue(self):
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def get_command_queue(self):
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return self.cmd_queue
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return self.cmd_queue
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def build_config(self):
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def build_config(self):
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self.mcu.add_config_cmd(self.config_msg)
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for msg in self.config_msgs:
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self.mcu.add_config_cmd(msg)
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self.spi_send_cmd = self.mcu.lookup_command(
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self.spi_send_cmd = self.mcu.lookup_command(
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"spi_send oid=%c data=%*s", cq=self.cmd_queue)
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"spi_send oid=%c data=%*s", cq=self.cmd_queue)
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self.spi_transfer_cmd = self.mcu.lookup_command(
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self.spi_transfer_cmd = self.mcu.lookup_command(
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@ -68,11 +80,24 @@ def MCU_SPI_from_config(config, mode, pin_option="cs_pin",
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ppins.reset_pin_sharing(cs_pin_params)
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ppins.reset_pin_sharing(cs_pin_params)
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pin = None
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pin = None
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# Load bus parameters
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# Load bus parameters
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speed = config.getint('spi_speed', default_speed, minval=100000)
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bus = config.getint('spi_bus', 0, minval=0)
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# Create MCU_SPI object
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mcu = cs_pin_params['chip']
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mcu = cs_pin_params['chip']
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return MCU_SPI(mcu, bus, pin, mode, speed, shutdown_seq)
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speed = config.getint('spi_speed', default_speed, minval=100000)
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if config.get('spi_software_sclk_pin', None) is not None:
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sw_pin_names = ['spi_software_%s_pin' % (name,)
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for name in ['sclk', 'mosi', 'miso']]
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sw_pin_params = [ppins.lookup_pin(config.get(name), share_type=name)
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for name in sw_pin_names]
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for pin_params in sw_pin_params:
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if pin_params['chip'] != mcu:
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raise ppins.error("%s: spi pins must be on same mcu" % (
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config.get_name(),))
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sw_pins = tuple([pin_params['pin'] for pin_params in sw_pin_params])
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bus = None
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else:
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bus = config.getint('spi_bus', 0, minval=0)
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sw_pins = None
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# Create MCU_SPI object
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return MCU_SPI(mcu, bus, pin, mode, speed, shutdown_seq, sw_pins)
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######################################################################
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######################################################################
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@ -7,4 +7,4 @@ src-$(CONFIG_HAVE_GPIO_SPI) += spicmds.c thermocouple.c
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src-$(CONFIG_HAVE_GPIO_I2C) += i2ccmds.c
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src-$(CONFIG_HAVE_GPIO_I2C) += i2ccmds.c
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src-$(CONFIG_HAVE_GPIO_HARD_PWM) += pwmcmds.c
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src-$(CONFIG_HAVE_GPIO_HARD_PWM) += pwmcmds.c
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src-$(CONFIG_HAVE_GPIO_BITBANGING) += lcd_st7920.c lcd_hd44780.c buttons.c \
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src-$(CONFIG_HAVE_GPIO_BITBANGING) += lcd_st7920.c lcd_hd44780.c buttons.c \
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tmcuart.c
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tmcuart.c spi_software.c
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@ -0,0 +1,81 @@
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// Software SPI emulation
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//
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// Copyright (C) 2019 Kevin O'Connor <kevin@koconnor.net>
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//
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include "board/irq.h" // gpio_out_setup
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#include "board/gpio.h" // gpio_out_setup
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#include "basecmd.h" // oid_alloc
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#include "command.h" // DECL_COMMAND
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#include "sched.h" // sched_shutdown
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struct spi_software {
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struct gpio_out sclk, mosi;
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struct gpio_in miso;
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uint8_t mode;
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};
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void
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command_config_software_spi(uint32_t *args)
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{
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uint8_t oid = args[0], sclk_pin = args[1], mosi_pin = args[2];
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uint8_t miso_pin = args[3], mode = args[4];
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if (mode > 3)
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shutdown("Invalid spi mode");
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struct spi_software *spi = oid_alloc(oid, command_config_software_spi
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, sizeof(*spi));
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spi->sclk = gpio_out_setup(sclk_pin, 0);
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spi->mosi = gpio_out_setup(mosi_pin, 0);
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spi->miso = gpio_in_setup(miso_pin, 1);
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}
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DECL_COMMAND(command_config_software_spi,
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"config_software_spi oid=%c sclk_pin=%u mosi_pin=%u miso_pin=%u"
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" mode=%u rate=%u");
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struct spi_software *
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spi_software_oid_lookup(uint8_t oid)
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{
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return oid_lookup(oid, command_config_software_spi);
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}
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void
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spi_software_prepare(struct spi_software *ss)
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{
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gpio_out_write(ss->sclk, ss->mode < 2 ? 0 : 1);
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}
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void
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spi_software_transfer(struct spi_software *ss, uint8_t receive_data
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, uint8_t len, uint8_t *data)
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{
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while (len--) {
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uint8_t outbuf = *data;
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uint8_t inbuf = 0;
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for (uint_fast8_t i = 0; i < 8; i++) {
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if (ss->mode & 0x01) {
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// MODE 1 & 3
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gpio_out_toggle(ss->sclk);
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gpio_out_write(ss->mosi, outbuf & 0x80);
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outbuf <<= 1;
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gpio_out_toggle(ss->sclk);
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inbuf <<= 1;
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inbuf |= gpio_in_read(ss->miso);
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} else {
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// MODE 0 & 2
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gpio_out_write(ss->mosi, outbuf & 0x80);
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outbuf <<= 1;
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gpio_out_toggle(ss->sclk);
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inbuf <<= 1;
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inbuf |= gpio_in_read(ss->miso);
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gpio_out_toggle(ss->sclk);
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}
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}
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if (receive_data)
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*data = inbuf;
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data++;
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}
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}
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@ -0,0 +1,11 @@
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#ifndef __SPI_SOFTWARE_H
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#define __SPI_SOFTWARE_H
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#include <stdint.h> // uint8_t
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struct spi_software *spi_software_oid_lookup(uint8_t oid);
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void spi_software_prepare(struct spi_software *ss);
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void spi_software_transfer(struct spi_software *ss, uint8_t receive_data
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, uint8_t len, uint8_t *data);
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#endif // spi_software.h
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@ -5,14 +5,19 @@
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// This file may be distributed under the terms of the GNU GPLv3 license.
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include <string.h> // memcpy
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#include <string.h> // memcpy
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#include "autoconf.h" // CONFIG_HAVE_GPIO_BITBANGING
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#include "board/gpio.h" // gpio_out_write
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#include "board/gpio.h" // gpio_out_write
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#include "basecmd.h" // oid_alloc
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#include "basecmd.h" // oid_alloc
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#include "command.h" // DECL_COMMAND
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#include "command.h" // DECL_COMMAND
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#include "sched.h" // DECL_SHUTDOWN
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#include "sched.h" // DECL_SHUTDOWN
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#include "spi_software.h" // spi_software_setup
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#include "spicmds.h" // spidev_transfer
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#include "spicmds.h" // spidev_transfer
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struct spidev_s {
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struct spidev_s {
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union {
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struct spi_config spi_config;
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struct spi_config spi_config;
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struct spi_software *spi_software;
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};
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struct gpio_out pin;
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struct gpio_out pin;
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uint8_t flags;
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uint8_t flags;
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uint8_t shutdown_msg_len;
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uint8_t shutdown_msg_len;
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@ -20,7 +25,7 @@ struct spidev_s {
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};
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};
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enum {
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enum {
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SF_HAVE_PIN = 1,
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SF_HAVE_PIN = 1, SF_SOFTWARE = 2,
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};
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};
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void
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void
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@ -58,6 +63,26 @@ DECL_COMMAND(command_config_spi_without_cs,
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"config_spi_without_cs oid=%c bus=%u mode=%u rate=%u"
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"config_spi_without_cs oid=%c bus=%u mode=%u rate=%u"
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" shutdown_msg=%*s");
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" shutdown_msg=%*s");
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void
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command_config_spi_from_software(uint32_t *args)
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{
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uint8_t shutdown_msg_len = args[3];
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struct spi_software *sspi = spi_software_oid_lookup(args[1]);
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struct spidev_s *spi = oid_alloc(args[0], command_config_spi
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, sizeof(*spi) + shutdown_msg_len);
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spi->pin = gpio_out_setup(args[2], 1);
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spi->flags = SF_HAVE_PIN | SF_SOFTWARE;
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spi->spi_software = sspi;
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spi->shutdown_msg_len = shutdown_msg_len;
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uint8_t *shutdown_msg = (void*)(size_t)args[4];
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memcpy(spi->shutdown_msg, shutdown_msg, shutdown_msg_len);
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}
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#if CONFIG_HAVE_GPIO_BITBANGING
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||||||
|
DECL_COMMAND(command_config_spi_from_software,
|
||||||
|
"config_spi_from_software oid=%c sw_oid=%u pin=%u"
|
||||||
|
" shutdown_msg=%*s");
|
||||||
|
#endif
|
||||||
|
|
||||||
struct spidev_s *
|
struct spidev_s *
|
||||||
spidev_oid_lookup(uint8_t oid)
|
spidev_oid_lookup(uint8_t oid)
|
||||||
{
|
{
|
||||||
|
@ -68,11 +93,17 @@ void
|
||||||
spidev_transfer(struct spidev_s *spi, uint8_t receive_data
|
spidev_transfer(struct spidev_s *spi, uint8_t receive_data
|
||||||
, uint8_t data_len, uint8_t *data)
|
, uint8_t data_len, uint8_t *data)
|
||||||
{
|
{
|
||||||
|
if (CONFIG_HAVE_GPIO_BITBANGING && spi->flags & SF_SOFTWARE)
|
||||||
|
spi_software_prepare(spi->spi_software);
|
||||||
|
else
|
||||||
spi_prepare(spi->spi_config);
|
spi_prepare(spi->spi_config);
|
||||||
|
|
||||||
if (spi->flags & SF_HAVE_PIN)
|
if (spi->flags & SF_HAVE_PIN)
|
||||||
gpio_out_write(spi->pin, 0);
|
gpio_out_write(spi->pin, 0);
|
||||||
|
|
||||||
|
if (CONFIG_HAVE_GPIO_BITBANGING && spi->flags & SF_SOFTWARE)
|
||||||
|
spi_software_transfer(spi->spi_software, receive_data, data_len, data);
|
||||||
|
else
|
||||||
spi_transfer(spi->spi_config, receive_data, data_len, data);
|
spi_transfer(spi->spi_config, receive_data, data_len, data);
|
||||||
|
|
||||||
if (spi->flags & SF_HAVE_PIN)
|
if (spi->flags & SF_HAVE_PIN)
|
||||||
|
|
Loading…
Reference in New Issue