usb-firewall-fork/Upstream/Inc/upstream_spi.h

/*
 * upstream_spi.h
 *
 *  Created on: 21/06/2015
 *      Author: Robert Fisk
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#ifndef INC_UPSTREAM_SPI_H_
#define INC_UPSTREAM_SPI_H_


#include "upstream_statemachine.h"
#include "usbd_config.h"
#include "led.h"



#define UPSTREAM_PACKET_HEADER_LEN      (2)         //Min length = CommandClass & Command bytes
#define UPSTREAM_PACKET_LEN             (UPSTREAM_PACKET_HEADER_LEN + MSC_MEDIA_PACKET)
#define UPSTREAM_PACKET_LEN_MIN         (UPSTREAM_PACKET_HEADER_LEN)

#define UPSTREAM_PACKET_HEADER_LEN_16   (UPSTREAM_PACKET_HEADER_LEN / 2)
#define UPSTREAM_PACKET_LEN_16          (UPSTREAM_PACKET_LEN / 2)
#define UPSTREAM_PACKET_LEN_MIN_16      (UPSTREAM_PACKET_LEN_MIN / 2)


#define UPSTREAM_SPI_FREAKOUT                               \
    do {                                                    \
        LED_SetState(LED_STATUS_FLASH_ERROR);               \
        /*UpstreamInterfaceState = UPSTREAM_INTERFACE_ERROR; */ \
        Upstream_StateMachine_SetErrorState();              \
        while (1);                                          \
} while (0);



typedef enum
{
    UPSTREAM_INTERFACE_IDLE,
    UPSTREAM_INTERFACE_TX_SIZE_WAIT,
    UPSTREAM_INTERFACE_TX_SIZE,
    UPSTREAM_INTERFACE_TX_PACKET_WAIT,
    UPSTREAM_INTERFACE_TX_PACKET,
    UPSTREAM_INTERFACE_RX_SIZE_WAIT,
    UPSTREAM_INTERFACE_RX_SIZE,
    UPSTREAM_INTERFACE_RX_PACKET_WAIT,
    UPSTREAM_INTERFACE_RX_PACKET,
    UPSTREAM_INTERFACE_ERROR
}
InterfaceStateTypeDef;


typedef enum
{
    NOT_BUSY,
    BUSY
}
PacketBusyTypeDef;


typedef struct
{
    PacketBusyTypeDef   Busy;                       //Everything after Busy should be word-aligned
    uint16_t            Length16 __ALIGN_END;       //Packet length includes CommandClass, Command, and Data
    uint8_t             CommandClass;
    uint8_t             Command;
    uint8_t             Data[MSC_MEDIA_PACKET];     //Should (must?) be word-aligned, for USB copy routine
}
UpstreamPacketTypeDef;



typedef void (*FreePacketCallbackTypeDef)(UpstreamPacketTypeDef* freePacket);
typedef void (*SpiPacketReceivedCallbackTypeDef)(UpstreamPacketTypeDef* replyPacket);


void Upstream_InitSPI(void);
HAL_StatusTypeDef Upstream_GetFreePacket(FreePacketCallbackTypeDef callback);
UpstreamPacketTypeDef* Upstream_GetFreePacketImmediately(void);
void Upstream_ReleasePacket(UpstreamPacketTypeDef* packetToRelease);
HAL_StatusTypeDef Upstream_TransmitPacket(UpstreamPacketTypeDef* packetToWrite);
HAL_StatusTypeDef Upstream_ReceivePacket(SpiPacketReceivedCallbackTypeDef callback);
void Upstream_TxOkInterrupt(void);
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi);
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi);



#endif /* INC_UPSTREAM_SPI_H_ */