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


comtest/serial demo for ATmega128

Posted by Nobody/Anonymous on July 28, 2005

I have been trying to get the demo code working on an atmega128 and I have succeeded at every point except for the function vAltStartComTestTasks. LED 4 is blinking very rapidly indicating transmitting, but LED 5 is not blinking at all; and LED 7 is not blinking. If I comment out the ErrorCheck for ...ComTestTasks, then LED 7 will blink. So all the other tasks are running fine. (I have connected pins 2,3 on the DB-9 connector.)

I am not using an STK500 board and have the following questions concerning the instructions for porting to it:
1) What is being done when PORTD bits 0, 1 are connected to RS (what does RS mean?)?

2) What is being done when SPROG3 is connected to ISP6PIN? (Are these things I need to worry about; I am using an ATmega128 development board from PRLLC)

And then in comtest.c, the tasks vComTxTask and vComRxTask are created, but in all my searching of the source files and headers I cannot find where they are defined. It seems these could play a very important role in the code or not much of one at all. I see that at the beginning of comtest.c there are declarations:


with the two tasks being a parameter each time it is declared, but I am not quite understanding what is going on here.

Thanks for any and all help,

RE: comtest/serial demo for ATmega128

Posted by Nobody/Anonymous on August 3, 2005
I finally got everything up and running. It was simply a matter of naming convention. In Minimal/comtest.c I needed to change SIG_UART_RECV and SIG_UART_DATA to SIG_UART1_RECV and SIG_UART1_DATA.

Thanks again for the quick replies and the help

[ 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