2013-08-05 05:51 AM
Hi everbody,
I'm using a ST32F205VE. On my board, I'm using the internal watchdog of the microcontroller and an external watchdog (MCP1318T).During normal operation, the �c sends square pulses every 0.5s to the external watchdog. When the �c stops sending pulses, the external watchdog sends me a rising edge.Then, the �c is restarting because So it works well. My issue is when the �c is restarting (with his internal watchdog), I got something strange, because the pulses that the �c is sending to the external watchdog are 3 times longer (0.5s to 1.5s) and I've changed nothing in my configuration.I'm looking for explanations in the datasheet, but I've found nothing...If you've some ideas...thank you in advance. #rcc2013-08-05 06:44 AM
How do you generate the reset pulse to the external watchdog? Keep in mind that after a reset the STM32 runs on the HSI internal oscillator clock until you change to HSE and/or set the PLL multiplier.
Jack Peacock