.. _program_listing_file_libspookyaction_include_pn532_esp32_spi.hpp:

Program Listing for File spi.hpp
================================

|exhale_lsh| :ref:`Return to documentation for file <file_libspookyaction_include_pn532_esp32_spi.hpp>` (``libspookyaction/include/pn532/esp32/spi.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   //
   // Created by spak on 3/25/21.
   //
   
   #ifndef PN532_ESP32_SPI_HPP
   #define PN532_ESP32_SPI_HPP
   
   #include <driver/gpio.h>
   #include <driver/spi_master.h>
   #include <optional>
   #include <pn532/channel.hpp>
   #include <pn532/esp32/capable_mem.hpp>
   #include <pn532/esp32/irq_assert.hpp>
   
   namespace pn532::esp32 {
   
       using capable_buffer = std::vector<std::uint8_t, capable_allocator<std::uint8_t>>;
   
       enum struct spi_command : std::uint8_t {
           data_write = 0b01, 
           status_read = 0b10,
           data_read = 0b11,  
           none               
       };
   
       class spi_channel final : public channel {
           capable_buffer _dma_buffer;
   
           std::optional<spi_host_device_t> _host;
           spi_device_handle_t _device;
           irq_assert _irq_assert;
   
           enum struct recv_op_status {
               init,    
               did_poll,
               data_read
           };
           recv_op_status _recv_op_status;
   
           result<> perform_transaction(capable_buffer &buffer, spi_command cmd, comm_dir mode, ms timeout);
   
       protected:
           result<> raw_send(mlab::range<bin_data::const_iterator> buffer, ms timeout) override;
   
           result<> raw_receive(mlab::range<bin_data::iterator> buffer, ms timeout) override;
   
           result<> raw_poll_status(ms timeout);
   
           bool on_receive_prepare(ms timeout) override;
   
           void on_receive_complete(result<> const &) override;
   
           [[nodiscard]] comm_rx_mode raw_receive_mode() const override;
   
       public:
           bool wake() override;
   
           spi_channel(spi_host_device_t host, spi_bus_config_t const &bus_config, spi_device_interface_config_t device_cfg, spi_dma_chan_t dma_chan);
   
           spi_channel(spi_host_device_t host, spi_bus_config_t const &bus_config, spi_device_interface_config_t device_cfg, int dma_chan,
                       gpio_num_t response_irq_line, bool manage_isr_service);
   
           ~spi_channel() override;
       };
   
   }// namespace pn532::esp32
   
   #endif//PN532_ESP32_SPI_HPP