Hardware requirements

• Mini/micro USB cable

• Two LPCXpresso845MAX boards

• Personal Computer

Board settings

Run with: system_clk = 30 MHz. SPI0CLK = 30 MHz.

Pin connecting:
Connect SPI master on board to SPI slave on other board

    Master - SPI0                  Slave - SPI0   
Pin Name   Board Location      Pin Name   Board Location            
MISO       J2 pin 6            MISO       J2 pin 6                     
MOSI       J2 pin 7            MOSI       J2 pin 7                
SCK        J2 pin 5            SCK        J2 pin 5                 
SSEL0      J2 pin 8            SSEL0      J2 pin 8
GND        J1 pin 4            GND        J1 pin 4

Prepare the Demo

1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port on the board

2. Open a serial terminal with the following settings:

   • 9600 baud rate

   • 8 data bits

   • No parity

   • One stop bit

   • No flow control

3. Download the program to the target board.

4. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

The log below shows the output of the hello world demo in the terminal window:

This is SPI interrupt transfer master example.

Master start to send data to slave, please make sure the slave has been started!

The received data are:
  0x00  0x01  0x02  0x03  0x04  0x05  0x06  0x07  0x08  0x09  0x0A  0x0B  0x0C  0x0D  0x0E  0x0F
  0x10  0x11  0x12  0x13  0x14  0x15  0x16  0x17  0x18  0x19  0x1A  0x1B  0x1C  0x1D  0x1E  0x1F
  0x20  0x21  0x22  0x23  0x24  0x25  0x26  0x27  0x28  0x29  0x2A  0x2B  0x2C  0x2D  0x2E  0x2F
  0x30  0x31  0x32  0x33  0x34  0x35  0x36  0x37  0x38  0x39  0x3A  0x3B  0x3C  0x3D  0x3E  0x3F
Master interrupt transfer succeed!