62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
#pragma once
|
|
|
|
// Linux-SPI includes
|
|
#include <linux/spi/spidev.h>
|
|
|
|
// Hyperion includes
|
|
#include <hyperion/LedDevice.h>
|
|
|
|
///
|
|
/// The LedSpiDevice implements an abstract base-class for LedDevices using the SPI-device.
|
|
///
|
|
class LedSpiDevice : public LedDevice
|
|
{
|
|
public:
|
|
///
|
|
/// Constructs the LedDevice attached to a SPI-device
|
|
///
|
|
/// @param[in] outputDevice The name of the output device (eg '/etc/SpiDev.0.0')
|
|
/// @param[in] baudrate The used baudrate for writing to the output device
|
|
/// @param[in] latchTime_ns The latch-time to latch in the values across the SPI-device (negative
|
|
/// means no latch required) [ns]
|
|
///
|
|
LedSpiDevice(const std::string& outputDevice, const unsigned baudrate, const int latchTime_ns = -1);
|
|
|
|
///
|
|
/// Destructor of the LedDevice; closes the output device if it is open
|
|
///
|
|
virtual ~LedSpiDevice();
|
|
|
|
///
|
|
/// 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);
|
|
|
|
private:
|
|
/// The name of the output device
|
|
const std::string mDeviceName;
|
|
/// The used baudrate of the output device
|
|
const int mBaudRate_Hz;
|
|
/// The time which the device should be untouched after a write
|
|
const int mLatchTime_ns;
|
|
|
|
/// The File Identifier of the opened output device (or -1 if not opened)
|
|
int mFid;
|
|
/// The transfer structure for writing to the spi-device
|
|
spi_ioc_transfer spi;
|
|
};
|