hyperion.ng/libsrc/leddevice/ProviderSpi.h

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