Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training




Loading

LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by raedbenz on November 29, 2009
Hi,
i have enabled the UART0 receiver interrupt.
i installed interrupt using :

ctl_set_isr(UART0_INT, 0, CTL_ISR_TRIGGER_FIXED, vUART0ISR_Wrapper, 0);
ctl_unmask_isr(UART0_INT); /UART0_INT = 6

then the wrapper saves context, calls the handler and just blinks an led (LED2), then VICVectAddr = 0, then restore context.
the only task is running is LED1blink.
i open the terminal and i type a character and the LED2 emmits but the LED1 task freezes. it seems the whole scheduler freezed. Hints plz. thanks in advance.

RE: LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by MEdwards on November 29, 2009
>Hints plz

First hint - try doing it the way the documentation says to do it, and the examples show it being done. Don't use ctl anything.

Look at the Interrupt Service Routines section of this page http://www.freertos.org/portlpc2106.html but note with the compiler that Rowley have been using (I think it changed recently) the call to vASwitchCompatibleISR_Handler() should be made from assembler as __asm volatile("bl vASwitchCompatibleISR_Handler"); to stop it ever getting inlines. Also vASwitchCompatibleISR_Handler() should be written in ARM mode as ARM to THUMB interworking from naked functions is broken in some GCC versions.

RE: LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by raedbenz on November 29, 2009
Hi,
do u mean to use, VICIntSelect , VICIntEnable, VICVectAddr, VICVectCntl1 registers to set the interrupt?

RE: LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by raedbenz on December 1, 2009
Please check the C file. What is wrong in it? thanks
[link text][1]


[1]: http://www.mediafire.com/?n3zwo4dny3q

RE: LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by raedbenz on December 2, 2009
any help guys.....it will be much appreciated.

RE: LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by Dave on December 3, 2009
I have not read your C file, but the LPC2138 Rowley demo in the FreeRTOS download includes at least one ISR you can copy.

RE: LPC2368 + Rowley + FreeRTOS V6 ISR problem

Posted by raedbenz on December 5, 2009
sorted....thank you all...


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.


Free TCP/IP and file system demos for the RTOS


Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists