ARM LPC2129 Mini Development Board – Overview

ARM LPC2129 Mini Development Board from RhydoLabz can be used to evaluate and demonstrate the capabilities of LPC2129(ARM7TDMI-S) microcontrollers. The board is designed for general purpose applications and includes a variety of hardwares to exercise microcontroller peripherals. Ideally suitable for training and development purposes.

Key Features :

Compact and ready to use design
On Board 10 MHz Crystal Oscillator
Integrated ARM LPC2129 Microcontroller
Professional EMI/RFI Complaint PCB Layout Design for Noise Reduction
High Quality Two layer PTH PCB
Multiple programming options – USB/RS-232 with jumper selection at UART0
No separate programmer required (Built in Boot loader)
Power indication LED (Red)
Multiple Power source (USB, RMC Connector, DC barrel jack) with jumper selection
Power Supply with Reverse Polarity Protection
Controller Area Network (CAN) transceiver
CAN Controller (MCP 2551) interface
CAN connection taken from RMC connecter (+5V, CANH, CANL, GND)
Jumper selection at CAN RX & CAN TX
Buzzer interface
Pot interface to ADC
Temperature Sensor (MCP 9700) interface
For Buzzer,Temperature Sensor and Potentiometer jumper selection available, if necessary interface independently
Servo motor(SIG,+5V,GND), LCD & ZigBee can be easily interfaced through on-board connectors
Potentiometer for contrast control
ZigBee can be interfaced from either side of the board at UART0
4 on-board switches including a RESET switch
3 on-board SMD LED s connected to port pins
SMD LEDs and Switches , if necessary interface independently
Breadboard can be attached to the board
5V and 3.3V regulators available
3.3V/5V output available in berg strips
External power supply and adapter having range of 7 – 9V DC
In UART0 communication, position of programmer switch should be in manual mode
UART0 available at RMC connecter with jumper selection option for power i.e; 3.3V/5V
UART1 available on berg strip (GND,TXD1,RXD1)
Two on board programming modes
- Automatic – no reset, no ISP jumper
- Manual – insert ISP jumper & press reset switch
ISP jumper should be removed for code execution
On Board JTAG Connector for Debugging/Programming
All port pins available at Berg Strip

LPC2129 Chip Specification :

16/32-bit ARM7TDMI-S microcontroller in a 64 or 144 pin package
16 kB on-chip Static RAM
128/256 kB on-chip Flash Program Memory
128-bit wide interface/accelerator enables high speed 60 MHz operation
External 8, 16 or 32-bit bus (144 pin package only)
In-System Programming (ISP) and In-Application Programming (IAP) via on-chip boot-loader software
Flash programming takes 1ms per 512 byte line.Single sector or full chip erase takes 400ms
EmbeddedICE-RT interface enables breakpoints and watch points
Interrupt service routines can continue to execute whilst the foreground task is debugged with the on-chip Real Monitor software
Embedded Trace Macrocell enables non-intrusive high speed real-time tracing of instruction execution
2/4 interconnected CAN interfaces with advanced acceptance filters
4/8 channel 10-bit A/D converter with conversion time as low as 2.44 ms
Two 32-bit timers (with 4 capture and 4 compare channels)
PWM unit (6 outputs), Real Time Clock and Watchdog
Multiple serial interfaces including two UARTs (16C550), Fast I2C (400 kbits/s) and two SPIs™
60 MHz maximum CPU clock available from programmable on-chip PLL
Vectored Interrupt Controller with configurable priorities and vector addresses
Up to forty-six (64 pin) and hundred-twelve (144 pin package) 5V tolerant general purpose I/O pins
Up to 12 independent external interrupt pins available (EIN and CAP functions)
On-chip crystal oscillator with an operating range of 1 MHz to 30 MHz
Two low power modes
- Idle
- Power-down
Processor wake-up from Power-down mode via external interrupt
Individual enable/disable of peripheral functions for power optimization
Dual power supply
- CPU operating voltage range of 1.65V to 1.95V (1.8V +/- 8.3%)
- I/O power supply range of 3.0V to 3.6V (3.3V +/- 10%)

The following figures illustrate the peripheral features of the board:

J7,J9 – To select programming source as serial port/USB port
SW5(Programmer switch) – To select auto/manual mode of programming
J15(ISP jumper) – To be shorted in manual mode of programming & should be removed for code execution
Power LED – Glows when the board is powered
K2(Power jumper) – To select power source as USB/DC source
J8(JTAG jumper) – Toenable 20 pin JTAG connector for debugging
LED – 3 x On-board SMD LED s
SWITCH – 3 x On-board switches
SW (RESET) – Reset switch

J1,J2,J3 – Jumpers connects LEDs to port pins P0.17, P0.18 & P0.19
J4,J5,J6 – Jumpers connects Switches to port pins P0.14, P0.15 & P0.16
J10 – Jumper connect Buzzer to P0.21
J11 – Connects Temperature Sensor to P0.28(AD0.1)
J12 – Connects Potentiometer to P0.29(AD0.2)
J13,J14 – Connects CAN TX , CAN RX to CAN Controller (MCP 2551)
J16 – Jumper for selecting 3.3/5 V level when using UART0 through K14
K12 – Connector for accessing UART1
K13 – Connector for interfacing Servo Motor at P1.24
K14 – Connector for accessing UART0
K15 – Connector for accessing CAN
LCD – 16 pin Berg strip connector for LCD

Layout

Powering The board could be powered using 3 different ways

USB connector
DC Barrel Jack Connector
RMC Connector

The supply source can be selected as DC/USB using the jumper(K2). If DC source is selected, then either DC Barrel Jack or RMC connector can be used and the supply voltage should be in the range of 7-12 V.Once the board is powered, the power LED(red LED on the board) glows.

How to test ?Mini USB and Serial Cable can be used for programming ARM LPC2129 Mini Development Board. When USB cable is connected to the ARM LPC2129 board, Power LED(Red) on the top of mini development board glows, which shows the power indication.

Coding is done in Keil uVision4 IDE(Download). Basic steps after installation are mentioned below.

Step 1: Launch Keil uvision4

Step 2: The Keil uvision window opens as shown below

Step 3: To create a new project, select Project > New uVision Project from menu bar

Step 4: Save the project in a suitable location with appropriate name
Step 5: The following window opens. Select LPC 2129 (listed under NXP) from the drop-down list
Step 6: Click ‘Yes’ for the following question to copy and add the Startup code to Project
Step 7: This creates a target to the project
Step 8: Create a new file either by clicking the New File icon, or by selecting File > New or using keyboard shortcut CTRL + N
Step 9: Save the file in any name, but with .c extension in the project folder
Step 10: Double click on “Startup.s” to open the configuration window and configure as below
Step 11: Set the options as shown below and save
The PLL setup is done for 10MHz crystal. The divider (P) and multiplier (M) are selected such that the PLL output is 60MHz and and frequency of PLL current controlled oscillator is within the specified range of 156 – 320 MHz. If crystal frequency is changed, then these values must be changed accordingly.
Step 12: Right click on Target1 to set target file options. You can also do this by using the icon on ‘Build toolbar’ or Project > Options for Target ‘Target 1’
Step 13: Configure Target, Output and Linker options as shown below
TargetOutputLinker

Step 14: Right click Source Group 1 to add C file to source
Step 15: Select the C file created and cilck Add
Step 16: Now the c file gets added to the Source
Step 17: Type the code
Step 18: Click the build icon (encircled in figure) to build the project. Errors (if any) get listed in the Build output window. Correct them and build again. On successful building, the hex file will be generated in the project folder
Step 19: Now the code can be flashed to the controller in the board,
Note the following jumper connections

Select the power source as USB cable or DC source
Select USB or serial port using jumpers J7 & J9 for flashing the code
Both jumpers on bottom side means USB programming
Both jumpers on top side means RS232 serial programming
Select mode using programmer switch
In manual mode, insert ISP jumper and press reset button before programming
In auto mode, leave it open and proceed to programming

Now power up the board. The power LED(red LED on the board) glows. Open Flash Utility. Select the correct COM port recognized by PC and if its more than COM5 change it to any any lower COM port in Device Manager and select any suitable baud rate. Also select XTAL Frequency as 10000kHz

Step 20: Open the desired hex file to be programmed
Step 21: Read device ID
If auto mode is selected, simply clicking the ‘Read device ID’ button will read the ID. But in manual mode, press reset switch and click

Step 22: Click ‘Upload to Flash’

After successfully flashing the code into the controller, remove ISP jumper if programmed using manual mode and reset the board. Also ensure that all the necessary jumpers to get the desired output are shorted.

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