Hello together,
I would like to use MQTT on the LPC55S69-EVK. For this purpose, I have loaded the example "Paho MQTT Example" from the website https://www2.keil.com/iot/lpc55s69-evk . But unfortunately the example does not work for me and I hope someone here can help me.
My approach so far:
- I have installed uVision version 5.34.
- I have unzipped the project on my desktop
- I opened the project by double clicking on the file paho_mqtt_demo.uvprojx
- I selected the option with the ESP8266 via the Batch Set Up and rebuilt it
While building I got the following error message
.\Objects\paho_mqtt_demo.axf: Error: L6218E: Undefined symbol SystemCoreClockUpdate (referred from main.o)..\Objects\paho_mqtt_demo.axf: Error: L6218E: Undefined symbol SystemCoreClock (referred from clock_config.o)..\Objects\paho_mqtt_demo.axf: Error: L6218E: Undefined symbol SystemInit (referred from startup_lpc55s69_cm33_core0.o).Not enough information to list image symbols.Not enough information to list load addresses in the image map.Finished: 2 information, 0 warning and 3 error messages.".\Objects\paho_mqtt_demo.axf" - 3 Error(s), 1 Warning(s).Target not created.
How can I fix these errors?
Tom_Wue said:Undefined symbol SystemCoreClockUpdate
So you need to provide a definition for that symbol!
Similarly for SystemInit
Usually, this means that you are missing either source file(s) or a pre-built binary library which defines those symbols