About Jsong

Jsong · 2019-07-16

Hello,I need your help to recognize my issue correctly, please help me,background:I am having trouble using the stm32l053RB NUCLEO development board for USB protocol parsing.issue：When using timer to generate PWM, once the USB receive data is confi...

Jsong · 2019-07-28

Thank you very much for your guidance.This problem has been solved by closed USB low_power_enable.Bit 2 LP_MODE: Low-power mode This mode is used when the suspend-mode power constraints require that all static power dissipation is avoided, except the...

Jsong · 2019-07-21

Hi JW，I spent some time on the systemClock_Config of the STM32L053R8.When the TIMER and USB work at the same time, the problem of the timer counter has been repositioned.Please take a moment to help analyze；After SystemClock_Config，The RCC register...

Jsong · 2019-07-17

Thanks for your suggestion, I will continue to debug in this direction.Now I have some questions about the TIMER clock source and need your guidance.When I calculate the divider value of timer, SystemCoreClock is 16Mhz.uwPrescalerValue = (SystemCoreC...

Jsong · 2019-07-17

I am sorry for this mistake, I missed the while(1) loop when I intercepted the code.The complete code is as follows：int main(void){ /* Buffer used for USB transmission/reception*/ uint8_t usb_send[4], usb_recive[4]; #ifdef I2CEN /* Buffer us...

Jsong · 2019-07-17

@Community member Thank you very much for your reply and suggestions. Using the timer to generate the PWM waveform does not require timer's Interrupt Service Routine (ISR), but after the USB work, the PWM waveform frequency is from the original 1.31...

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problem with USB and timer

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