Cortex-M3 (NXP LPC1788) development environment construction

         Recently, I was fortunate enough to get a development board OM13001 from an NXP agent. This development board uses the NXP LPC1788 processor and has the following main features:

• Data Memory: 32 MB SDRAM + 96 KB internal
• Ethernet: 100/10M Ethernet interface based on SMSC LAN8720 Ethernet PHY
• Clock Crystals: 12.000 MHz crystal for CPU, 32.768 kHz crystal for RTC
• Connectors: 200 pos expansion connector (SODIMM standard), 0.6 mm pitch
• Other: 256 Kbit I2C E2PROM for storing
• Program Flash: 128 MB NAND FLASH + 512 kB internal

         For more information, please refer to the official website http://www.cn.nxp.com/demoboard/OM13001.html

         As for software, I have a KEIL ULINK2, so I decided to use KeiluVision4 integrated development environment. I used ULINK2 for online debugging.

2. ISP download environment construction

         The development board is powered by a USB cable. According to the user manual, the ISP download test is performed first. First, the USB-to-UART conversion driver is installed. The UART0 on the board is connected to the USB through the conversion chip and connected to a virtual serial port on the PC. The information printed by printf() in the program can be displayed through this virtual serial port.

         Secondly, download FlashMagic burning tool. For LPC1788, during reset, set the P2.10 pin of LPC1788 to low level, which can start the bootloader in ROM and enter ISP download mode to download the program through UART0 of the development board. With FlashMagic software, after the jumper J20 on the development board is connected, USB-to-UART can automatically send a signal to control entering ISP mode. To do this, we need to configure FlashMgaic. The configuration is as follows:

COMPort parameters installation USB-to-UART parameter settings in device manager

 Configure the parameters of the serial port RTS and DTR ports to enable the ISP_EN and RESET pins                                                                                                      

3. KeiluVision4 + KEIL ULINK2 debugging environment construction

         Use the examples that come with the development board to debug and test. The old version of Keil uVision4 may not support the LPC177X/8X chip, so the MDK is updated. The LPC1788 chip support appears in DEVICE.

As shown below       

         The settings in setting are as follows

         The software settings only need to be as above. ULINK2 uses the new version of the 10PIN JTAG port for connection, and its schematic diagram is as follows:

IV. Conclusion

         At this point, the development environment is complete. At first, I couldn't find the jtag device in the debug using keil. The reason was that the software version was too low. After updating MDK, the device could be recognized. Next, I started to learn about the various peripherals on the development board by module.