spi_dma_transfer#
Overview#
The spi_dma example shows how to use spi driver with DMA:
In this example, one spi instance as master and another spi instance as slave. Master sends a piece of data to slave, and check if the data slave received is correct.
Supported Boards#
LPCXpresso51U68
Hardware requirements
Micro USB cable
LPCXpresso51U68 board
Personal Computer
Board settings
Populate jumper JP3. Connect SPI5 pins to SPI3 pins:
Master - SPI5 CONNECTS TO Slave - SPI3
Pin Name Board Location Pin Name Board Location
MISO J1 pin 11 MISO J4 pin 3
MOSI J1 pin 13 MOSI J4 pin 2
SCK J2 pin 8 SCK J4 pin 4
PCS2 J1 pin 15 PCS2 J4 pin 7
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J6) 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.
Reset the SoC and run the project.
Running the demo
When the demo runs successfully, the log would be seen on the CMSIS DAP terminal like:
SPI dma example start.
This example use one spi instance as master and another as slave on one board.
Please make sure you make the correct line connection. Basically, the connection is:
SPI_master -- SPI_slave
CLK -- CLK
PCS -- PCS
SOUT -- SIN
SIN -- SOUT
This is SPI slave dma transfer completed callback.
This is SPI master dma transfer completed callback.
SPI transfer all data matched!
LPCXpresso54S018
Hardware requirements
Micro USB cable
LPCXpresso54S018 board
Personal Computer
Board settings
Connect SPI9 pins to SPI3 pins:
INSTANCE0(SPI9) CONNECTS TO INSTANCE1(SPI3)
Pin Name Board Location Pin Name Board Location
SCK J9 pin 9 SCK J14 pin 4
MISO J9 pin 11 MISO J9 pin 20
MOSI J9 pin 13 MOSI J12 pin 12
PCS0 J9 pin 15 PCS0 J14 pin 1
Prepare the Demo
Connect a micro USB cable between the PC host and the LPC-Link USB port (J8) on the 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.
Pull the micro USB cable out of the LPC-Link USB port (J8) and plug it into the port (J1) on the board.
Connect Dupont Lines between USB to UART interface module and the port (P4) on the board, and connect USB to UART interface module to the PC.
Reset the SoC and run the project.
Running the demo
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
Build the demo to generate a bin file. Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed: Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit enbable arm-none-eabi-objcopy -v -O binary “&{BuildArtifactFileName}” “&{BuildArtifactFileBaseName}.bin”
This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.
Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):
a. Open SEGGER J-FLASH Lite, select device LPC54S018.
b. Click the ‘Erase Chip’ to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)
c. Select the bin data file, set the ‘.bin/Erase Start’ address to 0x10000000, then click ‘Program Device’ Note: Please use above way to program the binary file built by armgcc tool chain to external flash. For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash. When the demo runs successfully, the log would be seen on the terminal like:
SPI dma example start.
This example use one spi instance as master and another as slave on one board.
Please make sure you make the correct line connection. Basically, the connection is:
SPI_master -- SPI_slave
CLK -- CLK
PCS -- PCS
SOUT -- SIN
SIN -- SOUT
This is SPI slave dma transfer completed callback.
This is SPI master dma transfer completed callback.
SPI transfer all data matched!
LPCXpresso54S018M
Hardware requirements
Micro USB cable
LPCXpresso54S018M board
Personal Computer
Board settings
Connect SPI9 pins to SPI3 pins:
INSTANCE0(SPI9) CONNECTS TO INSTANCE1(SPI3)
Pin Name Board Location Pin Name Board Location
SCK J9 pin 9 SCK J14 pin 4
MISO J9 pin 11 MISO J9 pin 20
MOSI J9 pin 13 MOSI J12 pin 12
PCS0 J9 pin 15 PCS0 J14 pin 1
Prepare the Demo
Connect a micro USB cable between the PC host and the LPC-Link USB port (J8) on the 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.
Pull the micro USB cable out of the LPC-Link USB port (J8) and plug it into the port (J1) on the board.
Connect Dupont Lines between USB to UART interface module and the port (P4) on the board, and connect USB to UART interface module to the PC.
Reset the SoC and run the project.
Running the demo
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
Build the demo to generate a bin file. Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed: Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit enbable arm-none-eabi-objcopy -v -O binary “&{BuildArtifactFileName}” “&{BuildArtifactFileBaseName}.bin”
This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.
Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):
a. Open SEGGER J-FLASH Lite, select device LPC54S018M.
b. Click the ‘Erase Chip’ to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)
c. Select the bin data file, set the ‘.bin/Erase Start’ address to 0x10000000, then click ‘Program Device’ Note: Please use above way to program the binary file built by armgcc tool chain to external flash. For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash.
When the demo runs successfully, the log would be seen on the terminal like:
SPI dma example start.
This example use one spi instance as master and another as slave on one board.
Please make sure you make the correct line connection. Basically, the connection is:
SPI_master -- SPI_slave
CLK -- CLK
PCS -- PCS
SOUT -- SIN
SIN -- SOUT
This is SPI slave dma transfer completed callback.
This is SPI master dma transfer completed callback.
SPI transfer all data matched!