sta-core/src/spi/device.cpp

#include <sta/spi/device.hpp>

#include <sta/assert.hpp>


namespace sta
{
    SPIDevice::SPIDevice(SPI * intf, GpioPin * csPin)
        : intf_{intf}, csPin_{csPin}
    {
        STA_ASSERT(intf != nullptr);
        STA_ASSERT(csPin != nullptr);
    }

    void SPIDevice::beginTransmission()
    {
        // Acquire SPI access and activate device
        intf_->acquire();
        select();
    }

    void SPIDevice::endTransmission()
    {
        // Deactivate device and release SPI access
        deselect();
        intf_->release();
    }


    // Forward I/O operations to SPI interface

    void SPIDevice::transfer(uint8_t data)
    {
        intf_->transfer(data);
    }

    void SPIDevice::transfer16(uint16_t data)
    {
        intf_->transfer16(data);
    }

    void SPIDevice::transfer(const uint8_t * buffer, size_t size)
    {
        STA_ASSERT(buffer != nullptr);

        intf_->transfer(buffer, size);
    }

    void SPIDevice::transfer(const uint8_t * txBuffer, uint8_t * rxBuffer, size_t size)
    {
        STA_ASSERT(txBuffer != nullptr);
        STA_ASSERT(rxBuffer != nullptr);
        STA_ASSERT(size != 0);

        intf_->transfer(txBuffer, rxBuffer, size);
    }

    void SPIDevice::receive(uint8_t * buffer, size_t size)
    {
        STA_ASSERT(buffer != nullptr);

        intf_->receive(buffer, size);
    }

    void SPIDevice::fill(uint8_t value, size_t count)
    {
        STA_ASSERT(count != 0);

        intf_->fill(value, count);
    }


    const SpiSettings & SPIDevice::settings() const
    {
        return intf_->settings();
    }


    void SPIDevice::select()
    {
        csPin_->setState(GpioPinState::LOW);
    }

    void SPIDevice::deselect()
    {
        csPin_->setState(GpioPinState::HIGH);
    }
} // namespace sta