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| .. | ||
| armgcc | ||
| board.c | ||
| board.h | ||
| clock_config.c | ||
| clock_config.h | ||
| dma_channel_chain_v3_14.xml | ||
| dma_channel_chain.c | ||
| pin_mux.c | ||
| pin_mux.h | ||
| readme.md | ||
Overview
The DMA channel chain transfer example is a simple demonstration program about how to use channel chain feaute with the SDK software. In this example three channel is used,
------->channel1
|
channel0-->------>channel0 | ------->channel2
Channel0 is configured with two descriptor, first descriptor is linked to the second, then trigger the channel0 by software, after channel0 first descriptor finish, it will trigger channel1 and channel2 start transfer, and trigger channel0 again, then channel0 second descritpor will be carried out, after second descriptor exhaust, example finish.
SDK version
- Version: 2.15.000
Toolchain supported
- IAR embedded Workbench 9.40.1
- Keil MDK 5.38.1
- GCC ARM Embedded 12.2
- MCUXpresso 11.8.0
Hardware requirements
- Mini/micro USB cable
- LPCXpresso55s69 board
- Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Note: MCUXpresso IDE project default debug console is semihost
- Connect a micro USB cable between the PC host and the CMSIS DAP USB port (P6) on the board
- Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
- 115200 baud rate
- 8 data bits
- No parity
- One stop bit
- No flow control
- Download the program to the target board.
- Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
DMA channel chain example begin.
Destination Buffer:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
DMA channel chain example finish.
Destination Buffer:
1 2 3 4 11 22 33 44 111 222 333 444 1111 2222 3333 4444