74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
#pragma once
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// Linux-SPI includes
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#include <linux/spi/spidev.h>
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// Hyperion includes
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#include <leddevice/LedDevice.h>
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///
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/// The LedSpiDevice implements an abstract base-class for LedDevices using the SPI-device.
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///
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class LedSpiDevice : public LedDevice
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{
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public:
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///
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/// Constructs specific LedDevice
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///
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/// @param deviceConfig json device config
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///
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LedSpiDevice(const Json::Value &deviceConfig);
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///
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/// Sets configuration
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///
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/// @param deviceConfig the json device config
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/// @return true if success
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virtual bool setConfig(const Json::Value &deviceConfig);
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///
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/// Destructor of the LedDevice; closes the output device if it is open
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///
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virtual ~LedSpiDevice();
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///
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/// Opens and configures the output device
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///
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/// @return Zero on succes else negative
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///
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int open();
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protected:
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///
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/// Writes the given bytes/bits to the SPI-device and sleeps the latch time to ensure that the
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/// values are latched.
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///
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/// @param[in[ size The length of the data
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/// @param[in] data The data
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///
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/// @return Zero on succes else negative
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///
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int writeBytes(const unsigned size, const uint8_t *data);
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/// The name of the output device
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std::string _deviceName;
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/// The used baudrate of the output device
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int _baudRate_Hz;
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/// The time which the device should be untouched after a write
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int _latchTime_ns;
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/// The File Identifier of the opened output device (or -1 if not opened)
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int _fid;
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/// which spi clock mode do we use? (0..3)
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int _spiMode;
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/// 1=>invert the data pattern
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bool _spiDataInvert;
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/// The transfer structure for writing to the spi-device
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spi_ioc_transfer _spi;
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};
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