cmsis_ecspi_sdma_loopback_transfer#
Overview#
CMSIS-Driver defines generic peripheral driver interfaces for middleware making it reusable across a wide range of supported microcontroller devices. The API connects microcontroller peripherals with middleware that implements for example communication stacks, file systems, or graphic user interfaces. More information and usage method please refer to http://www.keil.com/pack/doc/cmsis/Driver/html/index.html.
The cmsis_ecspi_sdma_loopback_transfer example shows how to use CMSIS ECSPI driver in SDMA way:
In this example , ECSPI will do a loopback transfer in SDMA way, so, there is no need to set up any pins. And we should set the ECSPIx->TESTREG[LBC] bit, this bit is used in Master mode only. When this bit is set, the ECSPI connects the transmitter and receiver sections internally, and the data shifted out from the most-significant bit of the shift register is looped back into the least-significant bit of the Shift register. In this way, a self-test of the complete transmit/receive path can be made. The output pins are not affected, and the input pins are ignored.
Supported Boards#
EVK-MIMX8MM
Hardware requirements
Micro USB cable
MIMX8MM6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board
Connect a USB cable between the host PC and the J901 USB port on the target board.
Open a serial terminal with the following settings:
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 demo runs successfully, the log would be seen on the debug terminal like:
This is ECSPI CMSIS SDMA loopback transfer example.
The ECSPI will connect the transmitter and receiver sections internally.
Start transfer...
This is ECSPI_MasterSignalEvent_t
Transfer completed!
ECSPI transfer all data matched!
EVK-MIMX8MN
Hardware requirements
Micro USB cable
MIMX8MN6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Board settings
No special settings are required.
Please note this application can’t support booting by uboot! and accordingly it does not support Flash target! This example aims to show the basic usage of the IP’s function, some of the used Resources are assigned to Cortex-A core by uboot.
Prepare the Demo
Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board
Connect a USB cable between the host PC and the J901 USB port on the target board.
Open a serial terminal with the following settings:
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 demo runs successfully, the log would be seen on the debug terminal like:
This is ECSPI CMSIS SDMA loopback transfer example.
The ECSPI will connect the transmitter and receiver sections internally.
Start transfer...
This is ECSPI_MasterSignalEvent_t
Transfer completed!
ECSPI transfer all data matched!
EVK-MIMX8MNDDR3L
Hardware requirements
Micro USB cable
MIMX8MN6-EVK board
J-Link Debug Probe
12V power supply
Personal Computer
Board settings
No special settings are required.
Please note this application can’t support booting by uboot! and accordingly it does not support Flash target! This example aims to show the basic usage of the IP’s function, some of the used Resources are assigned to Cortex-A core by uboot.
Prepare the Demo
Connect 12V power supply and J-Link Debug Probe to the board, switch SW101 to power on the board
Connect a USB cable between the host PC and the J901 USB port on the target board.
Open a serial terminal with the following settings:
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 demo runs successfully, the log would be seen on the debug terminal like:
This is ECSPI CMSIS SDMA loopback transfer example.
The ECSPI will connect the transmitter and receiver sections internally.
Start transfer...
This is ECSPI_MasterSignalEvent_t
Transfer completed!
ECSPI transfer all data matched!
EVK-MIMX8MP
Hardware requirements
Micro USB cable
EVK-MIMX8M Plus board
J-Link Debug Probe
12V power supply
Personal Computer
Board settings
No special settings are required.
Please note this application can’t support booting by uboot! and accordingly it does not support Flash target! This example aims to show the basic usage of the IP’s function, some of the used Resources are assigned to Cortex-A core by uboot.
Prepare the Demo
Connect 12V power supply and J-Link Debug Probe to the board, switch SW3 to power on the board
Connect a USB cable between the host PC and the J23 USB port on the target board.
Open a serial terminal with the following settings:
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 demo runs successfully, the log would be seen on the debug terminal like:
This is ECSPI CMSIS SDMA loopback transfer example.
The ECSPI will connect the transmitter and receiver sections internally.
Start transfer...
This is ECSPI_MasterSignalEvent_t
Transfer completed!
ECSPI transfer all data matched!