My application is to transfer a 32 bit from DDR (using DMA) to PL.
I connected the ILA to see the data at the m_axis_mm2s from axi_dma and it shows the m_axis_mm2s_tdata[31:0] always zero besides m_axis_mm2s_tready, m_axis_mm2s_tvalid and m_axis_mm2s_tlast seems ok.
| Cabeçalho 1 |
|---|
/*****************************************************************************/
/**
* @file streamExampleSimpleDMA.c
*
* In this file the basic set up of streaming a package buffer over the AXI
* Stream Interface to a Custom IP core in PL. This is example is highly
* inspired by examples from Xilinx.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- -------------------------------------------------------
* 1.00a jcla 03/04/16 The example is created based on other examples from
* Xilinx
* ***************************************************************************
*/
/***************************** Include Files *********************************/
#include "xaxidma.h"
#include "xparameters.h"
#include "xdebug.h"
/******************** Constant Definitions **********************************/
/*
* Device hardware build related constants.
*/
#define DMA_DEV_ID XPAR_AXIDMA_0_DEVICE_ID
#define MEM_BASE_ADDR 0x40400000
#define TX_BUFFER_BASE (MEM_BASE_ADDR + 0x00100000)
// The example can be extended to feature a larger stream package, but for
// simplicity it is now set to 0x1
#define MAX_PKT_LEN 0xe //0x20
#define TEST_START_VALUE 0x6
#define NUMBER_OF_TRANSFERS 10
/************************** Function Prototypes ******************************/
#if (!defined(DEBUG))
extern void xil_printf(const char *format, ...);
#endif
/************************** Variable Definitions *****************************/
/*
* Device instance definitions
*/
XAxiDma AxiDma;
/*****************************************************************************/
/*
* The entry point for this example. It invokes the example function,
* and reports the execution status.
*
* @param None.
*
* @return
* - XST_SUCCESS if example finishes successfully
* - XST_FAILURE if example fails.
*
* @note None.
*
******************************************************************************/
int main()
{
XAxiDma_Config *CfgPtr;
int Status;
int Index;
u8 *TxBufferPtr;
u8 Value;
xil_printf("\r\nStarting sending data\r\n");
TxBufferPtr = (u8 *)TX_BUFFER_BASE;
/* Initialize the XAxi Dma device.
*/
CfgPtr = XAxiDma_LookupConfig(DMA_DEV_ID);
if (!CfgPtr) {
xil_printf("No config found for %d\r\n", DMA_DEV_ID);
return XST_FAILURE;
}
Status = XAxiDma_CfgInitialize(&AxiDma, CfgPtr);
if (Status != XST_SUCCESS) {
xil_printf("Initialization failed %d\r\n", Status);
return XST_FAILURE;
}
if(XAxiDma_HasSg(&AxiDma)){
xil_printf("Device configured as SG mode \r\n");
return XST_FAILURE;
}
/* Disable interrupts, we use polling mode
*/
XAxiDma_IntrDisable(&AxiDma, XAXIDMA_IRQ_ALL_MASK,
XAXIDMA_DEVICE_TO_DMA);
Value = TEST_START_VALUE;
// Created the TxBuffer. For now it is set to one however it
// can be extended to a larger number
for(Index = 0; Index < MAX_PKT_LEN; Index ++) {
TxBufferPtr[Index] = Value;
Value = (Value + 1) & 0xFF;
}
/* Flush the SrcBuffer before the DMA transfer, in case the Data Cache
* is enabled
*/
Xil_DCacheFlushRange((UINTPTR)TxBufferPtr, MAX_PKT_LEN);
//Sets up the DMA-To-Device so that data i send.
Status = XAxiDma_SimpleTransfer(&AxiDma,(UINTPTR) TxBufferPtr,
MAX_PKT_LEN, XAXIDMA_DMA_TO_DEVICE);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
while (XAxiDma_Busy(&AxiDma,XAXIDMA_DMA_TO_DEVICE)) {} //wait
xil_printf("\r\nDone sending data\r\n");
/* Test finishes successfully
*/
return XST_SUCCESS;
Mensagem editada por: Herivaldo Maia
