random value in Sn_TX_RD

Question

So I have TCP connection with server but I cannot send data properly: This is how I send data: TX_write_pinter[0] = 0x05; TX_write_pinter[0] = 0x00; SpiWriteRegister(0x0000, 2, transmit_buffer, 5); SpiWriteRegister(0x0024, 1, TX_write_pinter, 1); SpiWriteRegister(0x0001, 1, SEND, 1); //command register receive; first argument is address and second is block address. third is buffer and fourth is size. So, first Tx buffer address is gonna be 0x0000 so I do not read it then I write data in TX buffer then I write new data size in TX_Write_Pointer then I do SEND command; but when I read TX_Read_pointer it gives me back strange values like 0x3060. While I execute this code server receives this:! image|690x351 Which is obviously nothing close that I try to send. what could be the problem ? I think I mess up with TX_Read_Pointer. After Send command when I read TX_Write_Pointer it gives me back correct value

becky · Answer

The procedure for sending data is as above. You must first read the address via TX_WR and write the data to that address. Please refer to ioLibrary Driver code. github.com Wiznet/ioLibrary_Driver/blob/master/Ethernet/W5500/w5500.c //***************************************************************************** // //! \file w5500.c //! \brief W5500 HAL Interface. //! \version 1.0.2 //! \date 2013/10/21 //! \par Revision history //! <2015/02/05> Notice //! The version history is not updated after this point. //! Download the latest version directly from GitHub. Please visit the our GitHub repository for ioLibrary. //! >> https://github.com/Wiznet/ioLibrary_Driver //! <2014/05/01> V1.0.2 //! 1. Implicit type casting -> Explicit type casting. Refer to M20140501 //! Fixed the problem on porting into under 32bit MCU //! Issued by Mathias ClauBen, wizwiki forum ID Think01 and bobh //! Thank for your interesting and serious advices. //! <2013/12/20> V1.0.1 //! 1. Remove warning //! 2. WIZCHIP_READ_BUF WIZCHIP_WRITE_BUF in case _WIZCHIP_IO_MODE_SPI_FDM_ //! for loop optimized(removed). refer to M20131220 This file has been truncated. show original