Esempio n. 1
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    def command_reset():
        """
        RESET (0000 011x)

        Resets the device to the default values. Wait at least (50us + 32 · t(CLK)) after the RESET command is sent
        before sending any other command.
        """
        spi.write([0x06])
Esempio n. 2
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    def command_reset():
        """
        RESET (0000 011x)

        Resets the device to the default values. Wait at least (50us + 32 · t(CLK)) after the RESET command is sent
        before sending any other command.
        """
        spi.write([0x06])
Esempio n. 3
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    def command_power_down():
        """
        POWERDOWN (0000 001x)

        The POWERDOWN command places the device into power-down mode. This command shuts down all internal analog
        components, opens the low-side switch, turns off both IDACs, but holds all register values. In case the
        POWERDOWN command is issued while a conversion is ongoing, the conversion completes before the ADS1220 enters
        power-down mode. As soon as a START/SYNC command is issued, all analog components return to their previous
        states.
        """
        spi.write([0x02])
Esempio n. 4
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    def command_power_down():
        """
        POWERDOWN (0000 001x)

        The POWERDOWN command places the device into power-down mode. This command shuts down all internal analog
        components, opens the low-side switch, turns off both IDACs, but holds all register values. In case the
        POWERDOWN command is issued while a conversion is ongoing, the conversion completes before the ADS1220 enters
        power-down mode. As soon as a START/SYNC command is issued, all analog components return to their previous
        states.
        """
        spi.write([0x02])
Esempio n. 5
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 def display(self):
     """Write display buffer to physical display."""
     self.command(SSD1306_COLUMNADDR)
     self.command(0)  # Column start address. (0 = reset)
     self.command(self.width - 1)  # Column end address.
     self.command(SSD1306_PAGEADDR)
     self.command(0)  # Page start address. (0 = reset)
     self.command(self._pages - 1)  # Page end address.
     # Write buffer data.
     # Set DC high for data.
     GPIO.output(DC_SEL, 1)
     # Write buffer.
     #print self._buffer
     spi.write(self._buffer)
Esempio n. 6
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    def command_start(self):
        """
        START/SYNC (0000 100x)

        In single-shot mode, the START/SYNC command is used to start a single conversion, or (when sent during an
        ongoing conversion) to reset the digital filter, and then restarts a single new conversion. When the device is
        set to continuous conversion mode, the START/SYNC command must be issued one time to start converting
        continuously. Sending the START/SYNC command while converting in continuous conversion mode resets the
        digital filter and restarts continuous conversions.
        """

        # Make sure that PGA is disabled if AINn = AVSS
        if 0x07 < self.__mux < 0x0c:
            if not self.__pga_bypass:
                raise ValueError("When AINn = AVSS internal low-noise PGA must be disabled!")
            if self.__gain > 0x02:
                raise ValueError("When AINn = AVSS only gain 1, 2 and 4 can be used")
        spi.write([0x08])
Esempio n. 7
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    def command_start(self):
        """
        START/SYNC (0000 100x)

        In single-shot mode, the START/SYNC command is used to start a single conversion, or (when sent during an
        ongoing conversion) to reset the digital filter, and then restarts a single new conversion. When the device is
        set to continuous conversion mode, the START/SYNC command must be issued one time to start converting
        continuously. Sending the START/SYNC command while converting in continuous conversion mode resets the
        digital filter and restarts continuous conversions.
        """

        # Make sure that PGA is disabled if AINn = AVSS
        if 0x07 < self.__mux < 0x0c:
            if not self.__pga_bypass:
                raise ValueError(
                    "When AINn = AVSS internal low-noise PGA must be disabled!"
                )
            if self.__gain > 0x02:
                raise ValueError(
                    "When AINn = AVSS only gain 1, 2 and 4 can be used")
        spi.write([0x08])
Esempio n. 8
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 def write_register(register, data):
     spi.write([0x40 | (register & 0x03) << 2, data])
Esempio n. 9
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 def write_register(register, data):
     spi.write([0x40 | (register & 0x03) << 2, data])
Esempio n. 10
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 def command(self, c):
     """Send command byte to display."""
     GPIO.output(DC_SEL, 0)
     spi.write([c])
Esempio n. 11
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 def data(self, c):
     """Send byte of data to display."""
     GPIO.output(self.DC_SEL, 1)
     spi.write([c])