About AlaaM

AlaaM · 2019-02-26

Hi,It's written here that STM32H750 has a JPEG hardware encoder / decoder for faster GUI operations.Is there an example for how to use this?Basically I need to know what kind of JPEGs it supports (and how to encode to the right JPEG type), and how to...

AlaaM · 2019-02-20

Hi,I want to play MP3 files that are located in an external flash.Do I need to load the files to RAM for playing them, or can I play them directly from flash?I'm asking because I might not have enough RAM for loading the whole file all at once.Thanks...

AlaaM · 2018-12-27

Hi,I'm using STM32F722RET, and I'm trying to do ADC sampling of 3 channels using DMA with a timer trigger.I configured the following:ADC:hadc1.Instance = ADC1; hadc1.Init.ScanConvMode = ADC_SCAN_ENABLE; hadc1.Init.ContinuousConvMode = ENABLE; hadc1.I...

AlaaM · 2018-12-02

Hi,I have an external flash connected to STM32F722 via SPI. Is there a way to view the content of the flash? Maybe with SEGGER J-Flash program?Thanks

AlaaM · 2018-11-21

Hi,I'm trying to capture a USB connection / disconnection event in STM32F722RE. The interrupt HAL_PCD_IRQHandler() is called when I connect / disconnect the device to the PC, but the flags USB_OTG_GINTSTS_SRQINT and USB_OTG_GINTSTS_OTGINT are never s...

AlaaM · 2019-01-14

I had the exact same problem. The solution is to configure RCC_LSEDRIVE to be high.If you use cubemx:Configuration > RCC > LSE Drive Capability > LSE oscillator high drive capabilityIf you don't use cubemx, add these lines in main.c in SystemClock_Co...

AlaaM · 2018-12-28

Thanks for the reply. Sorry what do you mean by connecting the timer output to the ADC pin? Physically connecting them? Also what do you mean by re-internalizing the signals?Additional thing I noticed is there's a warning on TIM1 in cube which says:C...

AlaaM · 2018-12-04

I just need a tool, without coding, to just view the content of the flash. Thanks I'll try openocd. Any other simpler ideas are welcome.

AlaaM · 2018-11-21

Thanks. Eventually I followed the solution here:https://community.st.com/s/question/0D50X00009XkXEESA3/which-function-can-detect-stm32f413-usbcdc-connected-or-disconnectedand it worked.In summary: CDC_Init_FS() (in usbd_cdc_if.c) is called when the u...

AlaaM · 2018-11-21

VBUS pin is not connected, and VBUS detection is disabled. When I enable VBUS detection by cubemx (Activate_VBUS: Enable sensing), the global interrupt HAL_PCD_IRQHandler() is not called anymore. Why is that?Note: I need the USB only as device, not h...

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JPEG hardware encoder / decoder

Playing MP3 files from flash

ADC DMA Timer trigger affects only the first callback

Is there a way to view content of external flash?

HAL_PCD_ConnectCallback() is not called on USB connection

Re: Problem with the RCC LSE STM32L496RET6 MCU.

Re: ADC DMA Timer trigger affects only the first callback

Re: Is there a way to view content of external flash?

Re: HAL_PCD_ConnectCallback() is not called on USB connection

Re: HAL_PCD_ConnectCallback() is not called on USB connection