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usb-firewall-fork/Downstream/Inc/downstream_spi.h

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2.4 KiB

/*
* downstream_spi.h
*
* Created on: 24/07/2015
* 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_DOWNSTREAM_SPI_H_
#define INC_DOWNSTREAM_SPI_H_
#include "usbh_config.h"
#define DOWNSTREAM_PACKET_HEADER_LEN (2) //Min length = CommandClass & Command bytes
#define DOWNSTREAM_PACKET_LEN (DOWNSTREAM_PACKET_HEADER_LEN + USBH_MAX_DATA_BUFFER)
#define DOWNSTREAM_PACKET_LEN_MIN (DOWNSTREAM_PACKET_HEADER_LEN)
#define DOWNSTREAM_PACKET_HEADER_LEN_16 (DOWNSTREAM_PACKET_HEADER_LEN / 2)
#define DOWNSTREAM_PACKET_LEN_16 (DOWNSTREAM_PACKET_LEN / 2)
#define DOWNSTREAM_PACKET_LEN_MIN_16 (DOWNSTREAM_PACKET_LEN_MIN / 2)
#define DOWNSTREAM_SPI_FREAKOUT \
do { \
Downstream_PacketProcessor_FreakOut(); \
DownstreamInterfaceState = DOWNSTREAM_INTERFACE_ERROR; \
while (1); \
} while (0);
typedef enum
{
DOWNSTREAM_INTERFACE_IDLE,
DOWNSTREAM_INTERFACE_RX_SIZE_WAIT,
DOWNSTREAM_INTERFACE_RX_PACKET_WAIT,
DOWNSTREAM_INTERFACE_TX_SIZE_WAIT,
DOWNSTREAM_INTERFACE_TX_PACKET_WAIT,
DOWNSTREAM_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[USBH_MAX_DATA_BUFFER]; //Should (must?) be word-aligned, for USB copy routine
}
DownstreamPacketTypeDef;
typedef void (*FreePacketCallbackTypeDef)(DownstreamPacketTypeDef* freePacket);
typedef void (*SpiPacketReceivedCallbackTypeDef)(DownstreamPacketTypeDef* receivedPacket);
void Downstream_InitSPI(void);
HAL_StatusTypeDef Downstream_GetFreePacket(FreePacketCallbackTypeDef callback);
DownstreamPacketTypeDef* Downstream_GetFreePacketImmediately(void);
void Downstream_ReleasePacket(DownstreamPacketTypeDef* packetToRelease);
HAL_StatusTypeDef Downstream_ReceivePacket(SpiPacketReceivedCallbackTypeDef callback);
HAL_StatusTypeDef Downstream_TransmitPacket(DownstreamPacketTypeDef* packetToWrite);
void Downstream_SPIProcess(void);
void HAL_SPI_TxRxCpltCallback(SPI_HandleTypeDef *hspi);
void HAL_SPI_ErrorCallback(SPI_HandleTypeDef *hspi);
#endif /* INC_DOWNSTREAM_SPI_H_ */