brahmi

Hello @jpeyron Please reply as soon as possible. Thank you.

Hello all, I am using ZC-706 zynq board as slave and atmega128 microcontroller as master. I want to do spi communication between them. For testing i am just transmitting 1 byte of data which is transmitting successfully from the master side. For FPGA slave i am using AXI quad spi IP core which is configured in slave mode. Please find the below block diagram design for same. From the PS side i am using the below SPI driver example which is mentioned below. /***************************** Include Files *********************************/ #include "xparameters.h" /* XPAR parameters */ #include "xspi.h" /* SPI device driver */ #include "stdio.h" #include "xil_printf.h" /************************** Constant Definitions *****************************/ /* * The following constants map to the XPAR parameters created in the * xparameters.h file. They are defined here such that a user can easily * change all the needed parameters in one place. */ #define SPI_DEVICE_ID XPAR_SPI_0_DEVICE_ID /* * This is the size of the buffer to be transmitted/received in this example. */ #define BUFFER_SIZE 16 /**************************** Type Definitions *******************************/ /***************** Macros (Inline Functions) Definitions *********************/ /************************** Function Prototypes ******************************/ static int SpiSlavePolledExample(XSpi *SpiInstancePtr, u16 SpiDeviceId); /************************** Variable Definitions *****************************/ /* * The instances to support the device drivers are global such that they are * initialized to zero each time the program runs. They could be local but * should at least be static so that they are zeroed. */ static XSpi SpiInstance; /* The instance of the SPI device */ /* * The following variables are used to read from the Spi device, these are * global to avoid having large buffers on the stack. */ u8 ReadBuffer[BUFFER_SIZE]; u8 WriteBuffer[BUFFER_SIZE]; /* * The following variable allows a test value to be added to the values that * are sent in reflection to the Master transmission such that unique values can * be generated to guarantee the transfer from Slave to Master is successful. */ int Test; /*****************************************************************************/ /** * * Main function to call the Spi Slave example in polled mode. * * @param None * * @return XST_SUCCESS if successful, otherwise XST_FAILURE. * * @note None * ******************************************************************************/ int main(void) { int Status; /* * Run the Spi Slave polled example. */ Status = SpiSlavePolledExample(&SpiInstance, SPI_DEVICE_ID); if (Status != XST_SUCCESS) { xil_printf("Spi slave polled Example Failed\r\n"); return XST_FAILURE; } xil_printf("Successfully ran Spi slave polled Example\r\n"); return XST_SUCCESS; } /*****************************************************************************/ /** * * This function does a minimal test on the Spi device and driver as a design * example. The purpose of this function is to illustrate the device slave * functionality in polled mode. This function receives data from a master and * prints the received data. * * @param SpiInstancePtr is a pointer to the instance of Spi component. * * @param SpiDeviceId is the Device ID of the Spi Device and is the * XPAR_<SPI_instance>_DEVICE_ID value from xparameters.h. * * @return XST_SUCCESS if successful, otherwise XST_FAILURE. * * @note This function contains an infinite loop such that if the Spi * device doesn't receive any data, it may never return. * ******************************************************************************/ int SpiSlavePolledExample(XSpi *SpiInstancePtr, u16 SpiDeviceId) { XSpi_Config *ConfigPtr; int Status; u32 Count; xil_printf("\r\nEntering the Spi Slave Polled Example.\r\n"); xil_printf("Waiting for data from SPI master\r\n"); /* * Initialize the SPI driver so that it's ready to use, specify the * device ID that is generated in xparameters.h. */ ConfigPtr = XSpi_LookupConfig(SpiDeviceId); if (ConfigPtr == NULL) { return XST_FAILURE; } Status = XSpi_CfgInitialize(SpiInstancePtr, ConfigPtr, ConfigPtr->BaseAddress); if (Status != XST_SUCCESS) { return XST_FAILURE; } /* * The SPI device is a slave by default and the clock phase and polarity * have to be set according to its master. In this example, CPOL is set * to active low and CPHA is set to 1. */ Status = XSpi_SetOptions(SpiInstancePtr, XSP_CLK_ACTIVE_LOW_OPTION | XSP_CLK_PHASE_1_OPTION); if (Status != XST_SUCCESS) { return XST_FAILURE; } /* * Start the SPI driver so that the device is enabled. */ XSpi_Start(SpiInstancePtr); /* * Disable Global interrupt to use polled mode operation. */ XSpi_IntrGlobalDisable(SpiInstancePtr); /* * Initialize the write buffer with pattern to write, initialize the * read buffer to zero so that it can be verified after the read. */ //Test = 0xF0; //for (Count = 0; Count < BUFFER_SIZE; Count++) { //WriteBuffer[Count] = (u8)(Count + Test); //ReadBuffer[Count] = 0; //} /* * Prepare the data buffers for transmission and to send/receive data * when the SPI device is selected by a master. */ XSpi_Transfer(SpiInstancePtr, WriteBuffer, ReadBuffer, BUFFER_SIZE); /* * Print all the data received from the master so that it can be * compared with the data sent by the master. */ xil_printf("\r\nReceived data is:\r\n"); for (Count = 0; Count < BUFFER_SIZE; Count++) { xil_printf("0x%x \r\n", ReadBuffer[Count]); } xil_printf("\r\nExiting the Spi Slave Polled Example.\r\n"); return XST_SUCCESS; } I am not receiving any data. Please find the below output window picture. Kindly guide where I am wrong or I miss something? Thank you.