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

LPC2148 and UART IRQ

Posted by Borut on March 18, 2008
Hello to all,

I have a question that might have very straight forward answer but I don't see it. I have a problem generating IRQ for UART0 THRE (transmit reg. empty). What I want to know is what is the correct procedure to install an IRQ within FreeRTOS - should i do it before scheduler is started or it doesn't matter and how to install the THRE interrupt, because i know that there is some special initialization proccedure required for LPC2000 UART to generate IRQ's for THRE. I used the LPC2106 Rowley port (I'm using Rowley) for serial APIs but i don't get any interrupts generated.

thank you all for your help.

Regards, Borut

RE: LPC2148 and UART IRQ

Posted by Dave on March 18, 2008
I presume you did not change the sample driver included in the FreeRTOS download? Are you also using the startup code from the FreeRTOS demo? You need to set the IRQ interrupts to vector directly to the handler.

RE: LPC2148 and UART IRQ

Posted by Borut on March 18, 2008
I did the project on my own and I will check again for differences against the demo app. But still what is the right way to go about installing a new IRQ? What are the specifics one must take care about when trying to have an IRQ? Only that you have a wrapper function and a handler function?

Thanks,

Borut


[ 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