User manual

AOAA Kit - User’s Guide

Page 34

5 Program Development

This chapter describes how to download code to the AOAA board and how to compile the demo

applications – and in the extension, how to develop own demo applications. Details of the demo

applications are not described in this document.

5.1 Program Download

The AOAA board contains two processors, the LPC1769 and LPC11C24. Both supports program

download via SWD/JTAG. The LPC1769 additionally supports program download via ISP over UART

(the USB-to-UART bridge is used). The two methods are briefly described below:

 ISP over UART

ISP is short for In-System Programming. The LPC1769 contains a bootloader in ROM that

can be enabled by pulling pin P2.10 low during reset. The application can then be

downloaded over UART#0 (serial channel). An application is needed on the PC for

downloading the application code.

 SWD/JTAG

There are many different SWD/JTAG interfaces on the market. NXP has created LPC-LINK.

Keil has ULINK. IAR/Segger has JLINK. Code Red has Red Probe, etc. There is also

OpenOCD, which is an open source project. Consult the respective manual for the

SWD/JTAG interface used to get instructions how to download a hex/binary file.

It is assumed that a binary image exist that represent the application program. This file is often a so

called hex-file, which is a file format that Intel created a long time ago. It can also be a pure binary file

(then typically called a bin-file). The Embedded Artists support site contains pre-compiled hex/bin-files

of the demo applications. Section 5.2 describes how to compile the demo application, in order to

generate the hex-file.

5.1.1 ISP over UART Program Download

There are two jumpers (JP4) on the AOAA Board related to the USB-to-UART serial channel control

signals and automatic ISP functionality. See Figure 20 for details about where the USB connector and

jumpers are located. Normally the two jumpers in JP4 shall be inserted. However, sometimes the

terminal program on the PC/laptop can resets the board and/or enable ISP mode by accident. If this

happens, just remove the two JP4 jumpers.

When downloading code via ISP mode, the two jumpers in JP4 shall however be inserted. This way,

the application on the PC for downloaded the application code can automatically enable ISP mode.

Download and install Flash Magic (http://www.flashmagictool.com/). This application directly supports

application download via ISP (and can automatically enable ISP also).