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STM32F303RE: unwanted interrupt

Posted on September 14, 2015 at 18:12I have an EXTI programmed on PortB line8 that works as expected when  a rising edge is found on GPIO_IN8.Unfortunaltely sometimes, when I reset the GPIO_Pin15 of port B by doing  GPIOB->BRR  = GPIO_Pin_15  then t...

Why CDC_Receive_FS is empty on usbd_cdc_if.c?

Posted on September 02, 2015 at 20:23 Hi, I create a new project using cubemx 4.10 with hal 1.8 for USB device. I'm looking for receive function and i found CDC_Receive_FS, but there is almost no code in ther: /** * @brief CDC_Receive_FS ...

Problem with timer initialization (TIM1)

Posted on September 04, 2015 at 19:08Dear all, I want to use TIM1 CH3N  to drive a buzzer with different frequencies. I have tried to program TIM1 on channel 3N as below (the corresponding pin is already configured as AF_PP at 50 MHz): void buzz(uin...

danesh by Associate II
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About priority grouping

Posted on September 14, 2015 at 12:18 Hi , still with my STM32F429I disco-board project , I would know what is the return of this functions: /** \brief Get Priority Grouping The function reads the priority grouping field from the N...

Systick Interrupt using GNU Assembler

Posted on September 13, 2015 at 16:48Hi guys,I have a problem to test systick using GNU assembler on my STM32VLDiscoveryMy assembly code is:.thumb.syntax unified.cpu cortex-m3 @ STM32VLDiscovery Board .equ STACKINIT ,   0x20005000 .equ GPIOC_BASE ...

agung by Associate II
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Change PWM pulse

Posted on September 14, 2015 at 20:00 Hi, I'm using a servo with a pwm connection and this is a part of code: RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE); GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_1); GPIO_InitTypeDef GPI...

fenice-6 by Associate II
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PWM change not initially happening

Posted on September 14, 2015 at 16:40Hello Everybody.I am observing some strange behavior on the scope for a PWM output. I am driving it at 800kHz with alternating high time of 400ns and 800ns.In the TIM1_UP_TIM10_IRQHandler I am alternating the hig...

mlickess by Associate II
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STM32 not restart after external Reset

Posted on September 07, 2015 at 11:10 Dear all I use a master uP (STM32F072R8) and a slave uP (STM32F030K6) The slave processor is in AC main voltage and the main processor is galavanic isolated from main voltage. The main processor can rese...

franz2 by Associate III
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EEPROM emulation in STM32F103 (using CoIDE)

Posted on September 13, 2015 at 16:52 Hello World! I need an EEPROM memory on my device and there is no I2C pin free to use AT24Cxx. So, i should use EEPROM Emulation (as said in AN2594 http://www.st.com/web/en/catalog/tools/PF257846#). I...

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tux by Associate II
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Uart in 7bit mode

Posted on September 12, 2015 at 15:51I'm using STM32F051R8 board but i'm unable to configure UART in 7bit bata and one bit parity mode. Tried changing M and PCE bits of UART CR1 register but no luck.