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/*
* SharedSpiDevice.h
*
* Created on: 1 Jul 2019
* Author: David
*
* This currently supports only a single SPI channel. To support multiple SPI channels we would need to make the underlying SERCOM device
* configured in SPI mode a separate object, and have a pointer or reference to it in SharedSpiDevice.
*/
#ifndef SRC_HARDWARE_SHAREDSPI_SHAREDSPICLIENT_H_
#define SRC_HARDWARE_SHAREDSPI_SHAREDSPICLIENT_H_
#include <RepRapFirmware.h>
#include "SpiMode.h"
#include <RTOSIface/RTOSIface.h>
class SharedSpiDevice;
class SharedSpiClient
{
public:
SharedSpiClient(SharedSpiDevice& dev, uint32_t clockFreq, SpiMode m, Pin p, bool polarity) noexcept;
void SetCsPin(Pin p) noexcept { csPin = p; InitCsPin(); }
void SetCsPolarity(bool b) noexcept { csActivePolarity = b; }
void SetClockFrequency(uint32_t clockFreq) noexcept { clockFrequency = clockFreq; }
uint32_t GetFrequency() const noexcept { return clockFrequency; }
bool Select(uint32_t timeout = Mutex::TimeoutUnlimited) const noexcept; // get SPI ownership and select the device, return true if successful
void Deselect() const noexcept;
bool TransceivePacket(const uint8_t *tx_data, uint8_t *rx_data, size_t len) const noexcept;
bool ReadPacket(uint8_t *rx_data, size_t len) const noexcept { return TransceivePacket(nullptr, rx_data, len); }
bool WritePacket(const uint8_t *tx_data, size_t len) const noexcept { return TransceivePacket(tx_data, nullptr, len); }
private:
void InitCsPin() const noexcept;
SharedSpiDevice& device;
uint32_t clockFrequency;
Pin csPin;
SpiMode mode;
bool csActivePolarity;
};
#endif /* SRC_HARDWARE_SHAREDSPI_SHAREDSPICLIENT_H_ */
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