dma_example.c File Reference

DMA example for the ADRV903X project. More...

#include "dma_example.h"
#include "common_data.h"
#include "parameters.h"
#include "app_config.h"
#include "initdata.h"
#include "adrv903x.h"
#include "adi_adrv903x_radioctrl.h"
#include "adi_adrv903x_tx.h"
#include "adi_adrv903x_rx.h"
#include "clkgen_routines.h"
#include "no_os_print_log.h"
#include "no_os_error.h"
#include "no_os_gpio.h"
#include "no_os_util.h"
#include "ad9528.h"
#include "axi_jesd204_rx.h"
#include "axi_jesd204_tx.h"
#include "axi_adxcvr.h"
#include "axi_adc_core.h"
#include "axi_dac_core.h"
#include "axi_dmac.h"
#include "jesd204.h"
#include <string.h>
#include "no_os_axi_io.h"
#include <xil_cache.h>

Include dependency graph for dma_example.c:

Macros
#define	DMA_NUM_CHANNELS   8
#define	AXI_DO_REG_MEMORY_SIZE_LSB   0x0014
#define	AXI_DO_REG_TRANSFER_LENGTH   0x001C
#define	AXI_DO_REG_RESETN_OFFLOAD   0x0084
#define	AXI_DO_REG_CONTROL   0x0088

Functions
int	example_main ()
	DMA example main function.

Variables
uint32_t	dac_buffer_dma [DAC_BUFFER_SAMPLES]
uint16_t	adc_buffer_dma [ADC_BUFFER_SAMPLES *DMA_NUM_CHANNELS]

Detailed Description

DMA example for the ADRV903X project.

Author

Analog Devices Inc.

Copyright 2026(c) Analog Devices, Inc.

SPDX-License-Identifier: BSD-3-Clause

Macro Definition Documentation

AXI_DO_REG_CONTROL

#define AXI_DO_REG_CONTROL   0x0088

AXI_DO_REG_MEMORY_SIZE_LSB

#define AXI_DO_REG_MEMORY_SIZE_LSB   0x0014

AXI_DO_REG_RESETN_OFFLOAD

#define AXI_DO_REG_RESETN_OFFLOAD   0x0084

AXI_DO_REG_TRANSFER_LENGTH

#define AXI_DO_REG_TRANSFER_LENGTH   0x001C

DMA_NUM_CHANNELS

#define DMA_NUM_CHANNELS   8

Function Documentation

example_main()

int example_main

(

void

)

DMA example main function.

Basic example main execution.

Basic example main executiont.

Brings up the full JESD204 link and demonstrates DMA data transfer:

1. AD9528 clock synthesizer setup (DEVCLK + SYSREF)
2. SYSREF_REQ GPIO configuration
3. ADXCVR initialization (TX and RX)
4. AXI JESD204 TX and RX controller initialization
5. ADRV903X initialization (firmware load up to PreMcsInit_NonBroadcast)
6. AXI clkgen setup (lane_rate / 66 for JESD204C)
7. AXI DAC core init — load sine wave LUT into TX DMA buffer
8. AXI ADC core init — reset TPL ADC core + IQ correction
9. TX and RX DMAC initialization
10. JESD204 topology initialization and FSM start FSM drives: MCS (LINK_SETUP/OPT_SETUP_STAGE1/2) + link enable
11. Start TX DMA (continuous sine wave to DAC)
12. Wait 1 s then capture RX DMA samples
13. Print buffer addresses for inspection

Returns

0 on success, negative error code on failure.

IIO descriptor and initialization parameter.

IIO app.

Declaring iio_devices structure

Initializing IIO app init param.

Initializing IIO app.

Running the IIO app (use iio_info or osc in terminal).

Set the threshold voltage to 5V

The comparator output will be available on the GPO_A pin

Set the DAC output on channel C to 5V

Measure input current on channel D

GPIO Pin Interrupt Controller

UART init params

IIO application descriptor

IIO application initialization parameters

iio axi adc configurations.

iio axi dac configurations.

iio instance descriptor.

iio instance descriptor.

iio device instance descriptor.

Variable Documentation

adc_buffer_dma

uint16_t adc_buffer_dma[ADC_BUFFER_SAMPLES * DMA_NUM_CHANNELS]

dac_buffer_dma

uint32_t dac_buffer_dma[DAC_BUFFER_SAMPLES]