NXP LPCXpresso55S16¶
Overview¶
The LPCXpresso55S16 board provides the ideal platform for evaluation of the LPC55S1x/LPC551x MCU family, based on the Arm® Cortex®-M33 architecture. Arduino® UNO compatible shield connectors are included, with additional expansion ports around the Arduino footprint, along with a PMod/host interface port and MikroElektronika Click module site.
Hardware¶
LPC55S16 Arm® Cortex®-M33 microcontroller running at up to 150 MHz
256 KB flash and 96 KB SRAM on-chip
LPC-Link2 debug high speed USB probe with VCOM port
I2C and SPI USB bridging to the LPC device via LPC-Link2 probe
MikroElektronika Click expansion option
LPCXpresso expansion connectors compatible with Arduino UNO
PMod compatible expansion / host connector
Reset, ISP, wake, and user buttons for easy testing of software functionality
Tri-color LED
Full-speed USB device / host port
High-speed USB device / host port
UART header for external serial to USB cable
CAN Transceiver
Stereo audio codec with in/out line
NXP FXOS8700CQ accelerometer
For more information about the LPC55S16 SoC and LPCXPresso55S16 board, see:
Supported Features¶
The lpcxpresso55s16 board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
NVIC |
on-chip |
nested vector interrupt controller |
SYSTICK |
on-chip |
systick |
IOCON |
on-chip |
pinmux |
GPIO |
on-chip |
gpio |
I2C |
on-chip |
i2c |
SPI |
on-chip |
spi |
USART |
on-chip |
serial port |
SENSOR |
off-chip |
fxos8700 trigger |
CLOCK |
on-chip |
clock_control |
Other hardware features are not currently enabled.
Currently available targets for this board are:
lpcxpresso55s16
Connections and IOs¶
The LPC55S16 SoC has IOCON registers, which can be used to configure the functionality of a pin.
Name |
Function |
Usage |
|---|---|---|
PIO0_5 |
GPIO |
ISP SW4 |
PIO0_26 |
SPI |
SPI MOSI |
PIO0_29 |
USART |
USART RX |
PIO0_30 |
USART |
USART TX |
PIO1_1 |
SPI |
SPI SSEL1 |
PIO1_2 |
SPI |
SPI SCK |
PIO1_3 |
SPI |
SPI MISO |
PIO1_4 |
GPIO |
RED LED |
PIO1_6 |
GPIO |
BLUE_LED |
PIO1_7 |
GPIO |
GREEN LED |
PIO1_9 |
GPIO |
USR SW3 |
PIO1_18 |
GPIO |
Wakeup SW1 |
PIO1_20 |
I2C |
I2C SCL |
PIO1_21 |
I2C |
I2C SDA |
PIO1_26 |
GPIO |
FXOS8700 INT1 |
System Clock¶
The LPC55S16 SoC is configured to use the internal FRO at 96MHz as a source for the system clock. Other sources for the system clock are provided in the SOC, depending on your system requirements.
Serial Port¶
The LPC55S16 SoC has 8 FLEXCOMM interfaces for serial communication. One is configured as USART for the console, one is configured for I2C, and the remaining are not used.
Programming and Debugging¶
Build and flash applications as usual (see Building an Application and Run an Application for more details).
Configuring a Debug Probe¶
A debug probe is used for both flashing and debugging the board. This board is configured by default to use the LPC-Link2 CMSIS-DAP Onboard Debug Probe, however the pyOCD Debug Host Tools does not yet support the LPC55S16 so you must reconfigure the board for one of the J-Link debug probe instead.
First install the J-Link Debug Host Tools and make sure they are in your search path.
Then follow the instructions in LPC-Link2 J-Link Onboard Debug Probe to program the J-Link firmware. Please make sure you have the latest firmware for this board.
Configuring a Console¶
Connect a USB cable from your PC to J1 (LINK2), and use the serial terminal of your choice (minicom, putty, etc.) with the following settings:
Speed: 115200
Data: 8 bits
Parity: None
Stop bits: 1
Flashing¶
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b lpcxpresso55s16 samples/hello_world
west flash
Open a serial terminal, reset the board (press the RESET button), and you should see the following message in the terminal:
***** Booting Zephyr OS v2.2.0 *****
Hello World! lpcxpresso55s16
Debugging¶
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b lpcxpresso55s16 samples/hello_world
west debug
Open a serial terminal, step through the application in your debugger, and you should see the following message in the terminal:
***** Booting Zephyr OS zephyr-v2.2.0 *****
Hello World! lpcxpresso55s16