#pragma once

#include <stdint.h>

/* pcan-usb parameter get an set function */
#pragma pack(push, 1)
typedef struct
{
    uint8_t function;
    uint8_t number;
    uint8_t param[14];
} PCAN_USB_PARAM;
#pragma pack(pop)

/* USB control cmds get/set */
#define PCAN_USB_EX0 0x00
#define PCAN_USB_GET 0x01
#define PCAN_USB_SET 0x02
#define PCAN_USB_EX3 0x03

/* PCAN-USB commands */
#define PCAN_USB_CMD_BITRATE  1
#define PCAN_USB_CMD_CLOCK    2
#define PCAN_USB_CMD_BUS      3
#define PCAN_USB_CMD_DEVID    4
#define PCAN_USB_CMD_CFG      5
#define PCAN_USB_CMD_SN       6
#define PCAN_USB_CMD_REGISTER 9
#define PCAN_USB_CMD_EXT_VCC  10
#define PCAN_USB_CMD_ERR_FR   11
#define PCAN_USB_CMD_LED      12
#define PCAN_USB_CMD_DEVDATA  30
/* USB Mass Storage Mode command (FW >= 8.3.0) */
#define PCAN_USB_SETCAN2FLASH 0xC8

/* PCAN_USB_CMD_BUS PCAN_USB_SET extension: */
#define PCAN_USB_SET_SILENT_MODE 3

/* PCAN-USB rx/tx buffers size */
#define PCAN_USB_RX_BUFFER_SIZE 64
#define PCAN_USB_TX_BUFFER_SIZE 64

#define PCAN_USB_MSG_HEADER_LEN 2

/* PCAN-USB adapter internal clock (MHz) */
#define PCAN_USB_CRYSTAL_HZ 16000000

/* PCAN-USB USB message record status/len field */
#define PCAN_USB_STATUSLEN_TIMESTAMP (1 << 7)
#define PCAN_USB_STATUSLEN_INTERNAL  (1 << 6)
#define PCAN_USB_STATUSLEN_EXT_ID    (1 << 5)
#define PCAN_USB_STATUSLEN_RTR       (1 << 4)
#define PCAN_USB_STATUSLEN_DLC       (0xf)

/* PCAN-USB error flags */
#define PCAN_USB_ERROR_TXFULL    0x01
#define PCAN_USB_ERROR_RXQOVR    0x02
#define PCAN_USB_ERROR_BUS_LIGHT 0x04
#define PCAN_USB_ERROR_BUS_HEAVY 0x08
#define PCAN_USB_ERROR_BUS_OFF   0x10
#define PCAN_USB_ERROR_RXQEMPTY  0x20
#define PCAN_USB_ERROR_QOVR      0x40
#define PCAN_USB_ERROR_TXQFULL   0x80

/* SJA1000 registers */
#define SJA1000_MOD  0 /* mode register */
#define SJA1000_CMR  1
#define SJA1000_SR   2
#define SJA1000_IR   3
#define SJA1000_IER  4 /* acceptance code */
#define SJA1000_BTR0 6 /* bus timing 0 */
#define SJA1000_BTR1 7 /* bus timing 1 */
#define SJA1000_OCR  8 /* output control */
#define SJA1000_TR   9
#define SJA1000_CDR  31

/* SJA1000 modes */
#define SJA1000_MODE_NORMAL 0x00
#define SJA1000_MODE_INIT   0x01

/*
 * tick duration = 42.666 us =>
 * (tick_number * 44739243) >> 20 ~ (tick_number * 42666) / 1000
 * accuracy = 10^-7
 */
#define PCAN_USB_TS_DIV_SHIFTER 20
#define PCAN_USB_TS_US_PER_TICK 44739243

/* PCAN-USB messages record types */
#define PCAN_USB_REC_ERROR   1
#define PCAN_USB_REC_ANALOG  2
#define PCAN_USB_REC_BUSLOAD 3
#define PCAN_USB_REC_TS      4
#define PCAN_USB_REC_BUSEVT  5