使用z7系列fpga进行开发，使用dma遇到问题。 dmaip核只打开了s2mm功能，想要实现将axis协议数据储存到ddr中
#include "xaxidma.h"
#include "xparameters.h"
#include "xparameters_ps.h"
#include "xil_exception.h"
#include "xscugic.h"
#define DMA_DEV_ID XPAR_AXI_DMA_0_DEVICE_ID
#define XPAR_AXIDMA_0_BASEADDR 0x40400000
#define XPAR_AXIDMA_0_SG_INCLUDE_STSCNTRL_STRM 0
#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
//#define XPAR_AXIDMA_0_INCLUDE_MM2S 0
//#define XPAR_AXIDMA_0_INCLUDE_MM2S_DRE 0
//#define XPAR_AXIDMA_0_M_AXI_MM2S_DATA_WIDTH 32
#define XPAR_AXIDMA_0_INCLUDE_S2MM 1
#define XPAR_AXIDMA_0_INCLUDE_S2MM_DRE 0
#define XPAR_AXIDMA_0_M_AXI_S2MM_DATA_WIDTH 32
//#define XPAR_AXIDMA_0_INCLUDE_SG 0
//#define XPAR_AXIDMA_0_ENABLE_MULTI_CHANNEL 0
//#define XPAR_AXIDMA_0_NUM_MM2S_CHANNELS 1
#define XPAR_AXIDMA_0_NUM_S2MM_CHANNELS 1
//#define XPAR_AXIDMA_0_MM2S_BURST_SIZE 16
#define XPAR_AXIDMA_0_S2MM_BURST_SIZE 16
#define XPAR_AXIDMA_0_MICRO_DMA 0
#define XPAR_AXIDMA_0_c_addr_width 32
#define XPAR_AXIDMA_0_c_sg_length_width 14
#define RX_INTR_ID XPAR_FABRIC_AXI_DMA_0_S2MM_INTROUT_INTR
#define DDR_BASE_ADDR XPAR_PS7_DDR_0_S_AXI_BASEADDR //0x00100000
#define MEM_BASE_ADDR (DDR_BASE_ADDR + 0x1000000) //0x01100000
//#define TX_BUFFER_BASE (MEM_BASE_ADDR + 0x00100000) //0x01200000内存发送数据的位置
#define RX_BUFFER_BASE (MEM_BASE_ADDR + 0x00300000) //0x01400000内存存放数据的位置
#define RESET_TIMEOUT_COUNTER 10000 //复位时间
#define TEST_START_VALUE 0x0 //测试起始值
#define MAX_PKT_LEN 0x100 //发送包长度
static int check_data(int length, u8 start_value);
static void tx_intr_handler(void *callback);
static void rx_intr_handler(void *callback);
static int setup_intr_system(XScuGic * int_ins_ptr, XAxiDma * axidma_ptr,
u16 rx_intr_id);
static void disable_intr_system(XScuGic * int_ins_ptr,
u16 rx_intr_id);
static XAxiDma axidma; //XAxiDma实例
static XScuGic intc; //中断控制器的实例
volatile int tx_done; //发送完成标志
volatile int rx_done; //接收完成标志
volatile int error; //传输出错标志
int main(void)
{
int i;
int status;
u8 *rx_buffer_ptr;
XAxiDma_Config *config;
rx_buffer_ptr = (u8 *) RX_BUFFER_BASE;
xil_printf("\r\n--- Entering main() --- \r\n");
config = XAxiDma_LookupConfig(DMA_DEV_ID);
if (!config) {
xil_printf("No config found for %d\r\n", DMA_DEV_ID);
return XST_FAILURE;
}
status = XAxiDma_CfgInitialize(&axidma, config);
if (status != XST_SUCCESS) {
xil_printf("Initialization failed %d\r\n", status);
return XST_FAILURE;
}
status = setup_intr_system(&intc, &axidma, RX_INTR_ID);
if (status != XST_SUCCESS) {
xil_printf("Failed intr setup\r\n");
return XST_FAILURE;
}
rx_done = 0;
error = 0;
Xil_DCacheFlushRange((UINTPTR) rx_buffer_ptr, MAX_PKT_LEN);
status = XAxiDma_SimpleTransfer(&axidma, (UINTPTR) rx_buffer_ptr,
MAX_PKT_LEN, XAXIDMA_DEVICE_TO_DMA);
if (status != XST_SUCCESS) {
return XST_FAILURE;
}
while ( !rx_done && !error)；
//传输出错
if (error) {
xil_printf("Failed test transmit%s done, "
"receive%s done\r\n" " not",
rx_done ? "" : " not");
goto Done;
}
//传输完成，检查数据是否正确
status = check_data(MAX_PKT_LEN, TEST_START_VALUE);
if (status != XST_SUCCESS) {
xil_printf("Data check failed\r\n");
goto Done;
}
xil_printf("Successfully ran AXI DMA Loop\r\n");
disable_intr_system(&intc, RX_INTR_ID);
Done: xil_printf("--- Exiting main() --- \r\n");
return XST_SUCCESS;
}
static void rx_intr_handler(void *callback)
{
u32 irq_status;
int timeout;
XAxiDma *axidma_inst = (XAxiDma *) callback;
irq_status = XAxiDma_IntrGetIrq(axidma_inst, XAXIDMA_DEVICE_TO_DMA);
XAxiDma_IntrAckIrq(axidma_inst, irq_status, XAXIDMA_DEVICE_TO_DMA);
//Rx出错
if ((irq_status & XAXIDMA_IRQ_ERROR_MASK)) {
error = 1;
XAxiDma_Reset(axidma_inst);
timeout = RESET_TIMEOUT_COUNTER;
while (timeout) {
if (XAxiDma_ResetIsDone(axidma_inst))
break;
timeout -= 1;
}
return;
}
//Rx完成
if ((irq_status & XAXIDMA_IRQ_IOC_MASK))
rx_done = 1;
}
static int check_data(int length, u8 start_value)
{
u8 value;
u8 *rx_packet;
int i = 0;
value = start_value;
rx_packet = (u8 *) RX_BUFFER_BASE;
for (i = 0; i < length; i++) {
if (rx_packet[i] != value) {
xil_printf("Data error %d: %x/%x\r\n", i, rx_packet[i], value);
return XST_FAILURE;
}
value = (value + 1) & 0xFF;
}
return XST_SUCCESS;
}
static int setup_intr_system(XScuGic * int_ins_ptr, XAxiDma * axidma_ptr,
u16 rx_intr_id)
{
int status;
XScuGic_Config *intc_config;
//初始化中断控制器驱动
intc_config = XScuGic_LookupConfig(INTC_DEVICE_ID);
if (NULL == intc_config) {
return XST_FAILURE;
}
status = XScuGic_CfgInitialize(int_ins_ptr, intc_config,
intc_config->CpuBaseAddress);
if (status != XST_SUCCESS) {
return XST_FAILURE;
}
//设置优先级和触发类型
XScuGic_SetPriorityTriggerType(int_ins_ptr, rx_intr_id, 0xA0, 0x3);
//为中断设置中断处理函数
status = XScuGic_Connect(int_ins_ptr, rx_intr_id,(Xil_InterruptHandler) rx_intr_handler, axidma_ptr);
if (status != XST_SUCCESS) {
return status;
}
XScuGic_Enable(int_ins_ptr, rx_intr_id);
//启用来自硬件的中断
Xil_ExceptionInit();
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
(Xil_ExceptionHandler) XScuGic_InterruptHandler,
(void *) int_ins_ptr);
Xil_ExceptionEnable();
//使能DMA中断
XAxiDma_IntrEnable(&axidma, XAXIDMA_IRQ_ALL_MASK, XAXIDMA_DMA_TO_DEVICE);
XAxiDma_IntrEnable(&axidma, XAXIDMA_IRQ_ALL_MASK, XAXIDMA_DEVICE_TO_DMA);
return XST_SUCCESS;
}
static void disable_intr_system(XScuGic * int_ins_ptr,u16 rx_intr_id)
{
XScuGic_Disconnect(int_ins_ptr, rx_intr_id);
}
运行中在SDK terminal中没有看到打印出信息，使用memory监控看到地址没有储存数据。
我的解答思路和尝试过的方法 ：以上代码是以xdmaps_example_w_intr_1示例文件和正点原子zynq sdk dma中代码更改得到。更希望借鉴别人之前编写过的代码。
我想要达到的结果：使用dma ip核，只打开s2mm功能，将数据储存到ddr中。