// /* Transfer Command bits */

// /* All byte based commands consist of:
//  * - Command byte
//  * - Length lsb
//  * - Length msb
//  *
//  * If data out is enabled the data follows after the above command bytes,
//  * otherwise no additional data is needed.
//  * - Data * n
//  *
//  * All bit based commands consist of:
//  * - Command byte
//  * - Length
//  *
//  * If data out is enabled a byte containing bitst to transfer follows.
//  * Otherwise no additional data is needed. Only up to 8 bits can be transferred
//  * per transaction when in bit mode.
//  */

// /* b 0000 0000
//  *   |||| |||`- Data out negative enable. Update DO on negative clock edge.
//  *   |||| ||`-- Bit count enable. When reset count represents bytes.
//  *   |||| |`--- Data in negative enable. Latch DI on negative clock edge.
//  *   |||| `---- LSB enable. When set clock data out LSB first.
//  *   ||||
//  *   |||`------ Data out enable
//  *   ||`------- Data in enable
//  *   |`-------- TMS mode enable
//  *   `--------- Special command mode enable. See mpsse_cmd enum.
//  */
// pub enum CommandBits {

//     #define MC_DATA_TMS  (0x40) /* When set use TMS mode */
//     #define MC_DATA_IN   (0x20) /* When set read data (Data IN) */
//     #define MC_DATA_OUT  (0x10) /* When set write data (Data OUT) */
//     #define MC_DATA_LSB  (0x08) /* When set input/output data LSB first. */
//  #define MC_DATA_ICN  (0x04) /* When set receive data on negative clock edge */
//  #define MC_DATA_BITS (0x02) /* When set count bits not bytes */
//  #define MC_DATA_OCN  (0x01) /* When set update data on negative clock edge */
// }

 /* MPSSE engine command definitions */
 #[allow(non_camel_case_types)]
pub enum Command {
    // Mode commands
    /// Set Data bits LowByte
    MC_SETB_LOW,

    /// Read Data bits LowByte
    MC_READB_LOW,
    /// Set Data bits HighByte
    MC_SETB_HIGH,
    /// Read data bits HighByte
    MC_READB_HIGH,
    /// Enable loopback
    MC_LOOPBACK_EN,
    /// Disable loopback
    MC_LOOPBACK_DIS,
    /// Set clock divisor
    MC_SET_CLK_DIV,
    /// Flush buffer fifos to the PC.
    MC_FLUSH,
    /// Wait on GPIOL1 to go high.
    MC_WAIT_H,
    /// Wait on GPIOL1 to go low.
    MC_WAIT_L,
    /// Disable /5 div, enables 60MHz master clock
    MC_TCK_X5,
    /// Enable /5 div, backward compat to FT2232D
    MC_TCK_D5,
    /// Enable 3 phase clk, DDR I2C
    MC_EN_3PH_CLK,
    /// Disable 3 phase clk
    MC_DIS_3PH_CLK,
    /// Clock every bit, used for JTAG
    MC_CLK_N,
    /// Clock every byte, used for JTAG
    MC_CLK_N8,
    /// Clock until GPIOL1 goes high
    MC_CLK_TO_H,
    /// Clock until GPIOL1 goes low
    MC_CLK_TO_L,
    /// Enable adaptive clocking
    MC_EN_ADPT_CLK,
    /// Disable adaptive clocking
    MC_DIS_ADPT_CLK,
    /// Clock until GPIOL1 goes high, count bytes
    MC_CLK8_TO_H,
    /// Clock until GPIOL1 goes low, count bytes
    MC_CLK8_TO_L,
    /// Set IO to only drive on 0 and tristate on 1
    MC_TRI,
    /// CPU mode commands
    /// CPUMode read short address
    MC_CPU_RS,
    /// CPUMode read extended address
    MC_CPU_RE,
    /// CPUMode write short address
    MC_CPU_WS,
    /// CPUMode write extended address
    MC_CPU_WE,
}

impl Command {
    pub fn to_u8(&self) -> u8{
        use Command::*;
        match *self {
            /* Mode commands */
            MC_SETB_LOW => 0x80,     /* Set Data bits LowByte */
            MC_READB_LOW => 0x81,    /* Read Data bits LowByte */
            MC_SETB_HIGH => 0x82,    /* Set Data bits HighByte */
            MC_READB_HIGH => 0x83,   /* Read data bits HighByte */
            MC_LOOPBACK_EN => 0x84,  /* Enable loopback */
            MC_LOOPBACK_DIS => 0x85, /* Disable loopback */
            MC_SET_CLK_DIV => 0x86,  /* Set clock divisor */
            MC_FLUSH => 0x87,        /* Flush buffer fifos to the PC. */
            MC_WAIT_H => 0x88,       /* Wait on GPIOL1 to go high. */
            MC_WAIT_L => 0x89,       /* Wait on GPIOL1 to go low. */
            MC_TCK_X5 => 0x8A,       /* Disable /5 div, enables 60MHz master clock */
            MC_TCK_D5 => 0x8B,       /* Enable /5 div, backward compat to FT2232D */
            MC_EN_3PH_CLK => 0x8C,   /* Enable 3 phase clk, DDR I2C */
            MC_DIS_3PH_CLK => 0x8D,  /* Disable 3 phase clk */
            MC_CLK_N => 0x8E,        /* Clock every bit, used for JTAG */
            MC_CLK_N8 => 0x8F,       /* Clock every byte, used for JTAG */
            MC_CLK_TO_H => 0x94,     /* Clock until GPIOL1 goes high */
            MC_CLK_TO_L => 0x95,     /* Clock until GPIOL1 goes low */
            MC_EN_ADPT_CLK => 0x96,  /* Enable adaptive clocking */
            MC_DIS_ADPT_CLK => 0x97, /* Disable adaptive clocking */
            MC_CLK8_TO_H => 0x9C,    /* Clock until GPIOL1 goes high, count bytes */
            MC_CLK8_TO_L => 0x9D,    /* Clock until GPIOL1 goes low, count bytes */
            MC_TRI => 0x9E,          /* Set IO to only drive on 0 and tristate on 1 */
            /* CPU mode commands */
            MC_CPU_RS => 0x90, /* CPUMode read short address */
            MC_CPU_RE => 0x91, /* CPUMode read extended address */
            MC_CPU_WS => 0x92, /* CPUMode write short address */
            MC_CPU_WE => 0x93, /* CPUMode write extended address */
        }
    }
}