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README.md

HydraUSB3_DualBoard_SerDes

HydraUSB3_DualBoard_SerDes repository contains open source (see LICENSE) test firmware for HydraUSB3 v1 board using WCH CH569W MCU.

This example(DualBoard) requires 2x HydraUSB3 v1 boards to be plugged together.

  • First HydraUSB3 board(on bottom) shall have PB24 not populated (called RX mode)
  • Second HydraUSB3 board(on top of First board) shall have PB24 populated with a 2.54mm Jumper (called TX mode)
  • Connect HydraUSB3 SerDes P6 GXP/GXM on both boards
    • Connect a 2.54mm DuPont/Jumper Wire Female to Female from First HydraUSB3 board(on bottom) P6 GXP to Second HydraUSB3 board(on top of First board) P6 GXP
    • Connect a 2.54mm DuPont/Jumper Wire Female to Female from First HydraUSB3 board(on bottom) P6 GXM to Second HydraUSB3 board(on top of First board) P6 GXM
      First HydraUSB3 board Second HydraUSB3 board
      P6 GXP P6 GXP
      P6 GXM P6 GXM

The aim of this example is to use SerDes with Dual HydraUSB3 v1 boards connected together with following features/API

  • Main code available in User/Main.c
  • Log over serial port (5000000 bauds 8N1 in that example which requires USB2HS Serial like FTDI C232HM-DDHSL-0) with timestamp(second, millisecond, microsecond).
    FTDI C232HM-DDHSL-0 Pin HydraUSB3 Pin
    Orange ADBUS0 TX(Pin2) J5 RXD1
    Yellow ADBUS1 RX(Pin3) J5 TXD1
    Black GND (Pin10) GND (near RXD1)
  • Usage of PB24 GPIO to detect TX mode/RX mode board (with API bsp_switch())
  • Synchronize 2 HydraUSB3 v1 boards at startup using 2 GPIOs (with API bsp_sync2boards()).
  • Usage of SerDes in TX mode (with API SerDes_Tx_Init(), SerDes_DMA_Tx_CFG() and SerDes_DMA_Tx() / SerDes_Wait_Txdone())
  • Usage of SerDes in RX mode (with API SerDes_DoubleDMA_Rx_CFG())
  • Usage of SerDes Interrupt see (SERDES_IRQHandler() for Receive code)

This example is a very basic example to send different data/size(each 2s) over SerDes from one board to an other board

  • When pressing continuously UBTN 4K are sent in loop on SerDes each 100us.

Example output on Serial Port on RXD1:

00s 000ms 020us SYNC 00000001
00s 000ms 000us Start
00s 000ms 076us SerDes_Rx 2022/08/20 @ChipID=69
00s 000ms 221us FSYS=120000000
00s 000ms 327us SerDes_DoubleDMA_Rx_CFG() Before
00s 000ms 468us RX_DMA0_addr=0x20022000 RX_DMA1_addr=0x20021000
00s 000ms 664us SerDes_DoubleDMA_Rx_CFG() After
00s 000ms 800us SerDes_Rx_Init(SERDES_TX_RX_SPEED=0x1200) Before
00s 001ms 262us SerDes_Rx_Init() After
00s 001ms 378us SerDes_EnableIT(SDS_RX_INT_EN|SDS_RX_ERR_EN|SDS_FIFO_OV_EN) Before
00s 001ms 598us SerDes_EnableIT(SDS_RX_INT_EN|SDS_RX_ERR_EN|SDS_FIFO_OV_EN) After
00s 004ms 822us SDS_RX_LEN0=4 SDS_RX_LEN1=4 CNT_nb_cycles=135(1us)
00s 005ms 038us SDS_STATUS[0]=0x010F0024 SDS_STATUS[1]=0x020F0004 SDS_DATA0=0x0FFFFFFF SDS_DATA1=0x1FFFFFFF
00s 005ms 360us SDS_RX_ERR=0 SDS_FIFO_OV=0 RX_CRC_OK=1
00s 005ms 536us 5A5A5A5A
00s 005ms 628us 5A5A5A5A
02s 004ms 814us SDS_RX_LEN0=8 SDS_RX_LEN1=8 CNT_nb_cycles=131(1us)
02s 005ms 029us SDS_STATUS[0]=0x030F0004 SDS_STATUS[1]=0x040F0004 SDS_DATA0=0x2FFFFFFF SDS_DATA1=0x3FFFFFFF
02s 005ms 351us SDS_RX_ERR=0 SDS_FIFO_OV=0 RX_CRC_OK=1
02s 005ms 527us AAAA5555 AAAA5555
02s 005ms 651us AAAA5555 AAAA5555
04s 004ms 805us SDS_RX_LEN0=16 SDS_RX_LEN1=16 CNT_nb_cycles=149(1us)
04s 005ms 026us SDS_STATUS[0]=0x050F0004 SDS_STATUS[1]=0x060F0004 SDS_DATA0=0x4FFFFFFF SDS_DATA1=0x5FFFFFFF
04s 005ms 349us SDS_RX_ERR=0 SDS_FIFO_OV=0 RX_CRC_OK=1
04s 005ms 524us 11111111 11111111 11111111 11111111
04s 005ms 713us 11111111 11111111 11111111 11111111
06s 004ms 798us SDS_RX_LEN0=64 SDS_RX_LEN1=64 CNT_nb_cycles=197(1us)
06s 005ms 019us SDS_STATUS[0]=0x070F0004 SDS_STATUS[1]=0x080F0004 SDS_DATA0=0x6FFFFFFF SDS_DATA1=0x7FFFFFFF
06s 005ms 341us SDS_RX_ERR=0 SDS_FIFO_OV=0 RX_CRC_OK=1
06s 005ms 517us 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222
06s 006ms 096us 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222 22222222
...

Example output on Serial Port on TXD1:

00s 000ms 020us SYNC 00000001
00s 000ms 000us Start
00s 000ms 076us SerDes_Tx 2022/08/20 start @ChipID=69 (CPU Freq=120 MHz)
00s 000ms 288us TX_DMA_addr=0x20020000
00s 000ms 415us SerDes_Tx_Init(SERDES_TX_RX_SPEED=0x1200) Before
00s 000ms 876us SerDes_Tx_Init() After
00s 001ms 022us Wait 100us

For more details on how to build and flash this example on HydraUSB3 v1 board see the Wiki: