[W5100] SPI read problem

Question

I am using STM32F030 with W5100 with IAR compiler and LL driver. SPI mode IINCHIP_WRITE does work well. After setting below, I can SEE board IP on network. setSHAR(myMAC); //Source hardware address Register setSUBR(SUBNET); setGAR(myGateWay); //gateway address register setSIPR(myIP); //source IP addresss Register However, getSHAR, getGAR etc… I cannot read exact data that I set. IINCHIP_READ function work every other time. So I read SPI Inchip read twice in one function , that I can get proper answer. #define IINCHIP_SpiSendData SPI2_SendByte uint8_t SPI2_SendByte(uint8_t byte) { TimeOutSPI2 = SPI_TIMEOUT_MAX; while( !LL_SPI_IsActiveFlag_TXE(SPI2) ){ if (TimeOutSPI2-- == 0) return IOE_TIEMOUT; } *((__IO uint8_t *)&SPI2->DR) = byte; //LL_SPI_TransmitData8(SPI2, byte); TimeOutSPI2 = SPI_TIMEOUT_MAX; while( !LL_SPI_IsActiveFlag_RXNE(SPI2) ){ if (TimeOutSPI2-- == 0) return IOE_TIEMOUT; } return SPI2->DR;//LL_SPI_ReceiveData8(SPI2); } uint8 IINCHIP_WRITE(uint16 addr,uint8 data) { IINCHIP_ISR_DISABLE(); // Interrupt Service Routine Disable IINCHIP_CS_L; // CS=0, SPI start IINCHIP_SpiSendData(0xF0); IINCHIP_SpiSendData((uint8)((addr & 0xFF00) >> 8)); // Address byte 1 IINCHIP_SpiSendData((uint8)(addr & 0x00FF)); // Address byte 2 IINCHIP_SpiSendData(data); // Data write (write 1byte data) IINCHIP_CS_L; // CS=0, SPI start IINCHIP_CS_H; IINCHIP_ISR_ENABLE(); // Interrupt Service Routine Enable return 1; } uint8 IINCHIP_READ(uint16 addr) { uint8 data; IINCHIP_ISR_DISABLE(); // Interrupt Service Routine Disable IINCHIP_CS_L; // CS=0, SPI start IINCHIP_SpiSendData(0x0F); IINCHIP_SpiSendData((addr & 0xFF00) >> 8); // Address byte 1 IINCHIP_SpiSendData(addr & 0x00FF); // Address byte 2 IINCHIP_SpiSendData(0x00); data = IINCHIP_SpiSendData(0x00); IINCHIP_CS_L; // CS=0, SPI start IINCHIP_CS_H; // CS=1, SPI end /*IINCHIP_CS_L; // CS=0, SPI start IINCHIP_ISR_DISABLE(); // Interrupt Service Routine Disable IINCHIP_SpiSendData(0x0F); IINCHIP_SpiSendData((addr & 0xFF00) >> 8); // Address byte 1 IINCHIP_SpiSendData(addr & 0x00FF); // Address byte 2 IINCHIP_SpiSendData(0x00); data = IINCHIP_SpiSendData(0x00); // Data read (read 1byte data) IINCHIP_CS_L; // CS=0, SPI start IINCHIP_CS_H; // CS=1, SPI end */ IINCHIP_ISR_ENABLE(); // Interrupt Service Routine Enable return data; } It seems work fine when I set and read setting(IP, mac etc…) info. But when board ping to host, It is not working . answer from ping status (sn = getSn_SR(s)) is 0x63 .( value which is nowhere in dataseets ) I guess It is because I do not use Inchip read properly. I have check oscilloscope , MISO signal seems weirdly moving because sometimes does stay H when 1byte SCK done. except that, every timing is longer than datasheets says even reset timing. I do not use addr, data line, so it is opened. is that could be a problem? Has anyone see similar problem?

Eugeny · Answer

The problem is SPI communication. Pictures (timing) of all signals please for some read/write command.