The test application opens a handle to the device exposed by the driver and makes a DeviceIoControl call to initiate the example system DMA. To understand how the V3 system DMA calls are invoked, see the SDmaWrite function in sdma.c.
* 1.02a sg 05/16/2012 Some code cleanup and reorganisation of the * functions within the example. * 1.06a kpc 04/24/2012 Modified the APIs to make this file compatible with * peripheral test suite. * 2.1 kpc 08/23/2014 Fixed IAR compiler reported error. * 2.3 ms 01/23/17 Modified...
Code Issues Pull requests Efficient DMA timeout mechanism for peripheral DMA configured in circular mode demonstrated on a STM32 microcontroller. demo microcontroller example stm32 efficient uart dma-buffer mcu dma stm32l4 stm32l476 dma-timeout dma-controller Updated Jun 8, 2017 C Cr4sh / ...
This example requires no additional software or tools. Using the code example Create the project The ModusToolbox™ tools package provides the Project Creator as both a GUI tool and a command line tool. Use Project Creator GUI Open the Project Creator GUI tool. There are several ways to ...
For example, to define an EvtSerCx2SystemDmaReceiveCleanupTransaction callback function that is named MySystemDmaReceiveCleanupTransaction, use the EVT_SERCX2_SYSTEM_DMA_RECEIVE_CLEANUP_TRANSACTION function type, as shown in this code example:...
The following code example is from the PLX9x5x sample driver. This example sets a device's requirement for buffer alignment, initializes a WDF_DMA_ENABLER_CONFIG structure, and calls WdfDmaEnablerCreate.C++ Copy // // PLx PCI9656 DMA_TRANSFER_ELEMENTS must be 16-byte aligned. // Wdf...
Interesting thing however in generated function BOARD_ConfigMPU() in board.c is that the MPU attributes for the DTCM memory region is set cacheable, as shown in the code example: MPU->RBAR = ARM_MPU_RBAR(6, 0x20000000U);MPU->RASR = ARM_MPU_RASR(0, ARM_MPU_AP_FULL, ...
Additional data point: my example code ran on default oscillator settings. When I let it run inside the application where clocks are already set up for 120MHz, DMA reception works fine on UART1. 1 Kudo Reply 06-06-2012 09:32 PM 4,038 Views mjbcswitzerland Specialist V ...
Dr. Dobb's features articles, source code, blogs,forums,video tutorials, and audio podcasts,... drdobbs - 2013 被引量: 2发表: 1992年 Virtual first in first out (FIFO) direct memory access (DMA) device, electronic device and memory access method using the same Software tools and ...
前两周有人询问DMA下的cache操作和dma-coherent。以前零碎看过代码。临时找,还没有找到。 这两天整理了调用流程,也找到了dma-coherent的用法。Linux的文档里没有详细说明dma-coherent的用法。根据代码,如果dma的设备树里有dma-coherent,Linux则认为硬件会维护cache一致性,不会在dma运行过程中执行cache操作。