# PIC18 Port Problem **URL:** \ **Category:** Kernel\ **Created:** [November 2, 2009, 5:06pm UTC](https://forums.freertos.org/t/pic18-port-problem/358 "2009-11-02T17:06:26Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\ **Post date:** [November 2, 2009, 5:06pm UTC](https://forums.freertos.org/t/pic18-port-problem/358/1 "2009-11-02T17:06:26Z")
**[romantao](https://sourceforge.net/u/romantao/)** wrote on [Monday, November 02, 2009](https://sourceforge.net/p/freertos/discussion/382005/thread/07d50f41/#2107): Hi everybody. I’m starting to use freeRTOS for the first time and trying to build a small program to blink leds with a pic18f4580. I’ve already created a project file following this webpage [http://solar-blogg.blogspot.com/2009/06/setting-up-freertos-for-pic18-using.html,](http://solar-blogg.blogspot.com/2009/06/setting-up-freertos-for-pic18-using.html%2C) but everytime i get to the linking part i get the error: Error - section ‘.udata\_\_\_heap.o’ can not fit the section. Section ‘.udata\_\_\_heap.o’ length=0x00000400 I also get some warning messages saying FreeRTOS\Source\queue.c:1028:Warning  call of function without prototype and FreeRTOS\Source\list.c:66:Warning  type qualifier mismatch in assignment Can someone give me a few ints about these problems? Can I also use tiny bootloader to run the code generated? Regards ---
**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\ **Post date:** [November 3, 2009, 1:35pm UTC](https://forums.freertos.org/t/pic18-port-problem/358/2 "2009-11-03T13:35:29Z")
**[davedoors](https://sourceforge.net/u/davedoors/)** wrote on [Tuesday, November 03, 2009](https://sourceforge.net/p/freertos/discussion/382005/thread/07d50f41/#32fa): Just don’t do it, get yourself a real processor and a real compiler.