| 1 |
408 |
julius |
//////////////////////////////////////////////////////////////////////
|
| 2 |
|
|
// usbSerialInterfaceEngine_h.v
|
| 3 |
|
|
//////////////////////////////////////////////////////////////////////
|
| 4 |
|
|
|
| 5 |
|
|
`ifdef usbSerialInterfaceEngine_h_vdefined
|
| 6 |
|
|
`else
|
| 7 |
|
|
`define usbSerialInterfaceEngine_h_vdefined
|
| 8 |
|
|
|
| 9 |
|
|
// Sampling frequency = 'FS_OVER_SAMPLE_RATE' * full speed bit rate = 'LS_OVER_SAMPLE_RATE' * low speed bit rate
|
| 10 |
|
|
`define FS_OVER_SAMPLE_RATE 4
|
| 11 |
|
|
`define LS_OVER_SAMPLE_RATE 32
|
| 12 |
|
|
|
| 13 |
|
|
//timeOuts
|
| 14 |
|
|
`define RX_PACKET_TOUT 18
|
| 15 |
|
|
`define RX_EDGE_DET_TOUT 7
|
| 16 |
|
|
|
| 17 |
|
|
//TXStreamControlTypes
|
| 18 |
|
|
`define TX_DIRECT_CONTROL 8'h00
|
| 19 |
|
|
`define TX_RESUME_START 8'h01
|
| 20 |
|
|
`define TX_PACKET_START 8'h02
|
| 21 |
|
|
`define TX_PACKET_STREAM 8'h03
|
| 22 |
|
|
`define TX_PACKET_STOP 8'h04
|
| 23 |
|
|
`define TX_IDLE 8'h05
|
| 24 |
|
|
`define TX_LS_KEEP_ALIVE 8'h06
|
| 25 |
|
|
|
| 26 |
|
|
//RXStreamControlTypes
|
| 27 |
|
|
`define RX_PACKET_START 0
|
| 28 |
|
|
`define RX_PACKET_STREAM 1
|
| 29 |
|
|
`define RX_PACKET_STOP 2
|
| 30 |
|
|
|
| 31 |
|
|
//USBLineStates
|
| 32 |
|
|
// ONE_ZERO corresponds to differential 1. ie D+ = Hi, D- = Lo
|
| 33 |
|
|
`define ONE_ZERO 2'b10
|
| 34 |
|
|
`define ZERO_ONE 2'b01
|
| 35 |
|
|
`define SE0 2'b00
|
| 36 |
|
|
`define SE1 2'b11
|
| 37 |
|
|
|
| 38 |
|
|
//RXStatusIndices
|
| 39 |
|
|
`define CRC_ERROR_BIT 0
|
| 40 |
|
|
`define BIT_STUFF_ERROR_BIT 1
|
| 41 |
|
|
`define RX_OVERFLOW_BIT 2
|
| 42 |
|
|
`define NAK_RXED_BIT 3
|
| 43 |
|
|
`define STALL_RXED_BIT 4
|
| 44 |
|
|
`define ACK_RXED_BIT 5
|
| 45 |
|
|
`define DATA_SEQUENCE_BIT 6
|
| 46 |
|
|
|
| 47 |
|
|
//usbWireControlStates
|
| 48 |
|
|
`define TRI_STATE 1'b0
|
| 49 |
|
|
`define DRIVE 1'b1
|
| 50 |
|
|
|
| 51 |
|
|
//limits
|
| 52 |
|
|
`define MAX_CONSEC_SAME_BITS 4'h6
|
| 53 |
|
|
`define MAX_CONSEC_SAME_BITS_PLUS1 4'h7
|
| 54 |
|
|
// RESUME_RX_WAIT_TIME defines the time period for resume detection
|
| 55 |
|
|
// The resume counter is incremented at the bit rate, so
|
| 56 |
|
|
// RESUME_RX_WAIT_TIME = 29 corresponds to 30 * 1/12MHz = 2.5uS at full speed
|
| 57 |
|
|
// and 30 * 1/1.5MHz = 20uS at low speed, both of which are within the USB spec of
|
| 58 |
|
|
// 2.5uS <= resumeDetectTime <= 100uS
|
| 59 |
|
|
`define RESUME_RX_WAIT_TIME 5'd29
|
| 60 |
|
|
//`define RESUME_WAIT_TIME_MINUS1 9
|
| 61 |
|
|
// 'HOST_TX_RESUME_TIME' assumes counter is incremented at low speed bit rate
|
| 62 |
|
|
`ifdef SIM_COMPILE
|
| 63 |
|
|
`define HOST_TX_RESUME_TIME 16'd10
|
| 64 |
|
|
`else
|
| 65 |
|
|
`define HOST_TX_RESUME_TIME 16'd30000 //Host sends resume for 30000 * 1/1.5MHz = 20mS
|
| 66 |
|
|
`endif
|
| 67 |
|
|
//`define CONNECT_WAIT_TIME 8'd20
|
| 68 |
|
|
`define CONNECT_WAIT_TIME 8'd120 //Device connect detected after 120 * 1/48MHz = 2.5uS
|
| 69 |
|
|
//`define DISCONNECT_WAIT_TIME 8'd20
|
| 70 |
|
|
`define DISCONNECT_WAIT_TIME 8'd120 //Device disconnect detected after 120 * 1/48MHz = 2.5uS
|
| 71 |
|
|
|
| 72 |
|
|
//RXConnectStates
|
| 73 |
|
|
`define DISCONNECT 2'b00
|
| 74 |
|
|
`define LOW_SPEED_CONNECT 2'b01
|
| 75 |
|
|
`define FULL_SPEED_CONNECT 2'b10
|
| 76 |
|
|
|
| 77 |
|
|
//TX_RX_InternalStreamTypes
|
| 78 |
|
|
`define DATA_START 8'h00
|
| 79 |
|
|
`define DATA_STOP 8'h01
|
| 80 |
|
|
`define DATA_STREAM 8'h02
|
| 81 |
|
|
`define DATA_BIT_STUFF_ERROR 8'h03
|
| 82 |
|
|
|
| 83 |
|
|
//RXStMach states
|
| 84 |
|
|
`define DISCONNECT_ST 4'h0
|
| 85 |
|
|
`define WAIT_FULL_SPEED_CONN_ST 4'h1
|
| 86 |
|
|
`define WAIT_LOW_SPEED_CONN_ST 4'h2
|
| 87 |
|
|
`define CONNECT_LOW_SPEED_ST 4'h3
|
| 88 |
|
|
`define CONNECT_FULL_SPEED_ST 4'h4
|
| 89 |
|
|
`define WAIT_LOW_SP_DISCONNECT_ST 4'h5
|
| 90 |
|
|
`define WAIT_FULL_SP_DISCONNECT_ST 4'h6
|
| 91 |
|
|
|
| 92 |
|
|
//RXBitStateMachStates
|
| 93 |
|
|
`define IDLE_BIT_ST 2'b00
|
| 94 |
|
|
`define DATA_RECEIVE_BIT_ST 2'b01
|
| 95 |
|
|
`define WAIT_RESUME_ST 2'b10
|
| 96 |
|
|
`define RESUME_END_WAIT_ST 2'b11
|
| 97 |
|
|
|
| 98 |
|
|
//RXByteStateMachStates
|
| 99 |
|
|
`define IDLE_BYTE_ST 3'b000
|
| 100 |
|
|
`define CHECK_SYNC_ST 3'b001
|
| 101 |
|
|
`define CHECK_PID_ST 3'b010
|
| 102 |
|
|
`define HS_BYTE_ST 3'b011
|
| 103 |
|
|
`define TOKEN_BYTE_ST 3'b100
|
| 104 |
|
|
`define DATA_BYTE_ST 3'b101
|
| 105 |
|
|
|
| 106 |
|
|
`endif //usbSerialInterfaceEngine_h_vdefined
|
| 107 |
|
|
|
| 108 |
|
|
|