Quality RTOS & Embedded Software

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




Loading

Issue with NVIC_Configure() on STM32F100

Posted by Saccrue on June 29, 2013
I'm stuck on an issue. I have an STM32F100 VL Discovery board and I have setup FreeRTOS on it. I have two tasks and all works well on scheduling and running them. I added a USART driver to send characters to a terminal program through the USART. That seems to work fine, one of my tasks puts a character out to the serial port periodically.
The issue I am having is trying to setup an ISR to receive characters from the terminal program on my PC. If I uncomment the line to NVIC_Configure() I get a hard fault after the scheduler starts. If I comment out the line, all works as before.
void NVIC_Configuration()
{
NVIC_InitTypeDef NVIC_InitStructure;

/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

/* Enable the USART3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

Any ideas? The same code with FreeRTOS commented out works fine. So, there is something i'm missing about setting up the ISR and the presence of FreeRTOS.

RE: Issue with NVIC_Configure() on STM32F100

Posted by Dave on June 29, 2013
Search for "If you are using an STM32" on this page http://www.freertos.org/RTOS-Cortex-M3-M4.html. It is in red.

RE: Issue with NVIC_Configure() on STM32F100

Posted by Saccrue on June 29, 2013
Bam. Thanks.


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




Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS kernel V10 is available for immediate download. Now MIT licensed.


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

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

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

OpenRTOS and SafeRTOS