Rx Buffer Always returns 0x00

Question

Hello all, I’m new to arm and wiznet chips. So far, I’ve written a quarter of my own W5500 library (not tidied, yet). I also ran the tcp server code which uses built-in library on Wiznet site. (I used to send and receive data via TCP protocol and it means my hw and chips are ok!) Now… with my manual library; I can init W5500. I can configure and run it as TCP Server I can read and write internal registers I can see how many bytes received on Socket 0 correctly I can read and write rx buffer pointer correctly But my problem is that I always read 0x00 from RX buffer on Socket 0. Here is my part of code: while(1){ if (W5500_REG_READ_BYTE(SOCKET0_REGISTER_BLOCK, Sn_SR) == SOCK_ESTABLISHED){ received_data_size = W5500_GET_RECEIVED_DATA_SIZE(); //WORKS if((received_data_size) != 0){ rx_buff_data_pointer = W5500_GET_RECEIVED_DATA_POINTER(); for(int i = 0; i<2048; i++) test_receive_buffer[i] = W5500_REG_READ_BYTE(SOCKET0_RX_BUFFER, i); //ALWAYS RETURNS 0x00! local_rx_buff_data_pointer += received_data_size; W5500_REG_WRITE_BYTE(SOCKET0_REGISTER_BLOCK, Sn_RX_RD_MSB, 0); W5500_REG_WRITE_BYTE(SOCKET0_REGISTER_BLOCK, Sn_RX_RD_LSB, local_rx_buff_data_pointer); //WORKS W5500_REG_WRITE_BYTE(SOCKET0_REGISTER_BLOCK, Sn_CR, SOCKET_RECV); //WORKS test_receive_buffer5 = W5500_REG_READ_BYTE(SOCKET0_REGISTER_BLOCK, Sn_SR); //EXTRA FUNCTION TEST WORKS } } } I also tried to read all 2048 bytes of data and saw nothing except a few foreign characters in the middle. Here is my read byte function: // READ BYTE FUNCTION uint8_t W5500_REG_READ_BYTE(uint8_t r_W5500_REG_BLOCK, uint16_t r_W5500_REG_ADD){ uint8_t r_DataPhase; uint8_t r_control_phase = (r_W5500_REG_BLOCK << 3) | (W5500_READ_FLAG << 2 ) | (W5500_OPERATION_MODE); uint8_t r_reg_add_offset1 = (r_W5500_REG_ADD >> 8) & 0xFF; uint8_t r_reg_add_offset2 = r_W5500_REG_ADD & 0xFF; #if W5500_OPERATION_MODE == VARIABLE_DATA_LENGTH_MODE HAL_GPIO_WritePin(SCSn_GPIO_Port, SCSn_Pin, GPIO_PIN_RESET); if(((HAL_SPI_ERROR_STATE = HAL_SPI_Transmit(&W5500_SPI_PORT, &r_reg_add_offset1, sizeof(r_reg_add_offset1), W5500_SPI_TIMEOUT)) != HAL_SPI_ERROR_NONE)) goto W5500_REG_READ_BYTE_RET; if(((HAL_SPI_ERROR_STATE = HAL_SPI_Transmit(&W5500_SPI_PORT, &r_reg_add_offset2, sizeof(r_reg_add_offset2), W5500_SPI_TIMEOUT)) != HAL_SPI_ERROR_NONE)) goto W5500_REG_READ_BYTE_RET; if(((HAL_SPI_ERROR_STATE = HAL_SPI_Transmit(&W5500_SPI_PORT, &r_control_phase, sizeof(r_control_phase), W5500_SPI_TIMEOUT)) != HAL_SPI_ERROR_NONE)) goto W5500_REG_READ_BYTE_RET; if(((HAL_SPI_ERROR_STATE = HAL_SPI_Receive(&W5500_SPI_PORT, &r_DataPhase, sizeof(uint8_t), W5500_SPI_TIMEOUT)) != HAL_SPI_ERROR_NONE)) goto W5500_REG_READ_BYTE_RET; HAL_GPIO_WritePin(SCSn_GPIO_Port, SCSn_Pin, GPIO_PIN_SET); #elif W5500_OPERATION_MODE == FIXED_1BYTE_DATA_LENGTH_MODE if(((HAL_SPI_ERROR_STATE = HAL_SPI_Transmit(&W5500_SPI_PORT, &r_reg_add_offset1, sizeof(r_reg_add_offset1), W5500_SPI_TIMEOUT)) != HAL_SPI_ERROR_NONE)) goto W5500_REG_READ_BYTE_RET; if(((HAL_SPI_ERROR_STATE =…

nocturnal · Answer

Ok, I must admit that it was my mistake!! my control phase was 0x88 instead of 0x18! because of mistaken definition. Meanwhile, we’ve met and we’ll become wiznet friends from now on Thank you from now