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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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ST 32f429I-Discovery wrong delay timingPosted by fabio-it on January 16, 2015 Hi guys, I'm trying to use freeRTOS 8.1.2 with the aforementioned board but till now I only have bad timings. I've attached my current configuration for freeRTOS any idea? ST 32f429I-Discovery wrong delay timingPosted by edwards3 on January 16, 2015 #define configCPU_CLOCK_HZ ( SystemCoreClock ) Are you setting SystemCoreClock anywhere? To do that you normally call SystemCoreClockUpdate. Attachmentsfreertosconfig.h (7801 bytes) ST 32f429I-Discovery wrong delay timingPosted by fabio-it on January 16, 2015 Yes, I've checked and it correctly returns 180000000 (180MHz). I'm using the Standard Peripheral Driver from ST website, no problem at all with STM32F407 cpu Attachmentsfreertosconfig.h (7801 bytes) ST 32f429I-Discovery wrong delay timingPosted by edwards3 on January 16, 2015 Is SystemCoreClockUpdate() setting up the clock, or just setting SystemCoreClock to 180000000. If it is not setting up the clock does anything set up the clock. Maybe it is done before main() is called. My guess is the clock is not actually running at 180000000. Attachmentsfreertosconfig.h (7801 bytes) ST 32f429I-Discovery wrong delay timingPosted by fabio-it on January 16, 2015 SystemCoreClock is 168000000 at default, after initialization becames 180000000. I'm really stuck in this, seems like if the clock is about 4 times slower. I was wondering, on which clock the tick frequency is calculated? Could it be a PCLK1 or PCLK2? Attachmentsfreertosconfig.h (7801 bytes) ST 32f429I-Discovery wrong delay timingPosted by fabio-it on January 16, 2015 Solved, the default main clock, as you said, was different. FIXED Thanks a lot Attachmentsfreertosconfig.h (7801 bytes)
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
Meet Richard Barry and learn about running FreeRTOS on RISC-V at FOSDEM 2019
Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed.
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FreeRTOS and other embedded software careers at AWS.
