lpc_i2c_dma_b2b_master#
Overview#
The i2c_dma_b2b_transfer_master example shows how to use i2c driver as master to do board to board transfer with DMA:
In this example, one i2c instance as master and another i2c instance on the other board as slave. Master sends a piece of data to slave, and receive a piece of data from slave. This example checks if the data received from slave is correct.
Supported Boards#
LPCXpresso824MAX
Hardware requirements
Micro USB cable
Two LPCXpresso824MAX boards
Personal Computer
Board settings
I2C one board:
Transfer data from MASTER_BOARD to SLAVE_BOARD of I2C interface, I2C0 pins of MASTER_BOARD are connected with I2C0 pins of SLAVE_BOARD
MASTER_BOARD CONNECTS TO SLAVE_BOARD
Pin Name Board Location Pin Name Board Location
SCL J1-1 SCL J1-1
SDA J1-2 SDA J1-2
GND J1-4 GND J1-4
Prepare the Demo
Connect a micro USB cable between the PC host and the LPC-Link USB port (J3) on the board.
Open a serial terminal on PC for JLink serial device with these settings:
9600 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
The following message shows in the terminal if the example runs successfully.
I2C board2board DMA example -- Master transfer.
Master will send data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
Receive sent data from slave :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
End of I2C example .
LPCXpresso845MAX
Hardware requirements
Micro USB cable
Two LPCXpresso845MAX boards
Personal Computer
Board settings
I2C one board:
Transfer data from MASTER_BOARD to SLAVE_BOARD of I2C interface, I2C0 pins of MASTER_BOARD are connected with I2C0 pins of SLAVE_BOARD
MASTER_BOARD CONNECTS TO SLAVE_BOARD
Pin Name Board Location Pin Name Board Location
SCL J1-1 SCL J1-1
SDA J1-2 SDA J1-2
GND J1-4 GND J1-4
Prepare the Demo
Connect a micro USB cable between the PC host and the LPC-Link USB port (J4) on the board.
Open a serial terminal on PC for JLink serial device with these settings:
9600 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
The following message shows in the terminal if the example runs successfully.
I2C board2board DMA example -- Master transfer.
Master will send data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
Receive sent data from slave :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
End of I2C example .
LPCXpresso860MAX
Hardware requirements
Micro USB cable
Two LPCXpresso860MAX boards
Personal Computer
Board settings
I2C one board:
Transfer data from MASTER_BOARD to SLAVE_BOARD of I2C interface, I2C0 pins of MASTER_BOARD are connected with I2C0 pins of SLAVE_BOARD
MASTER_BOARD CONNECTS TO SLAVE_BOARD
Pin Name Board Location Pin Name Board Location
SCL J1-20 SCL J1-20
SDA J1-18 SDA J1-18
GND J1-14 GND J1-14
Prepare the Demo
Connect a micro USB cable between the PC host and the LPC-Link USB port (J4) on the board.
Open a serial terminal on PC for JLink serial device with these settings:
9600 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
The following message shows in the terminal if the example runs successfully.
I2C board2board DMA example -- Master transfer.
Master will send data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
Receive sent data from slave :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
End of I2C example .