About papageno

papageno · 2021-09-17

Hello experts,I am using a stm32F446RET6 (HAL and C) and I am using the PA1 input pin for receiving a serial stream with the TIM2 Channel for frequency and logic detection. This Input capture timer works perfectly. But prior to decode the stream I fi...

papageno · 2021-03-15

Dear experts,i try to use the float library with printf or vsnprintf. The option nano has been checked, the -u _printf_float too. The latest version of STM32cubeIDE, the proc is STM32F446RE. The value of floats are correctly displayed in debug but i...

papageno · 2020-11-24

Dear experts,My SanDisk Extreme 32GB V30 MicroSD HC 1 is not recognized by HAL.... SDIO 4 bits .Stay stuck in the SD_Init...Is that SD card not compatible with the standard implemented in HAL and the MCU ? Time is short and I cannot dig in the lower...

papageno · 2020-11-20

Hi everybody,With a 4 bits SDIO and stm32f446RE i can read and write data from SD using the FatFs lib, no problem. Ths Sd card is a sanDisk Ultra 8GB (10) MicroSd HC1 class1461. using 512bytes transfers (sector size), the write speed is not so amazin...

papageno · 2020-10-21

Hello dear experts,Reading the ST literature abour QuadSpi, I noticed that they only mention the flash as available peripheral chips on the QuadSPI Ibus. i would like to increase the amount of RAM on the stm32F446RE to create a buffer when writing to...

papageno · 2021-09-17

thanks Jan,i will give a try to EXTI later on, so far the port reading is satisfying.regards,Pap

papageno · 2021-09-17

Thanks Jan,It worked with ready GPIOA->IDR & PINA1 with a delay between readings closed to the signal frequency, arbitrary values are 2 or 0 which means the signal is toggling. Probably the EXTI would have been a more reliable solution, but not enou...

papageno · 2021-09-17

Thank you jan,You mean that even if the pin was configured as TIM2_CH2 and not as GPIO_input, i can still read (GPIOA->IDR & pin) the value or trigger an exception without setting anything ? I will try that. Regards,pap

papageno · 2021-03-16

Erratum: My apologies, the float lib in nano is ok. After searching a little, i found that the problem I had was incorrect data from upstream capture using IT and ISR: the data processed was corrupted in release configuration but all was ok in debu...

papageno · 2020-11-25

Thank you Clive, your helps and expertise are really appreciated.I guess that FatFs uses the DMA transfer. My application is a little tricky with data to read from SPI at 2.4Khz that has to be saved on SD card through sdio and I cannot miss one spi d...

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Switching alternate functions for on input pin

float correctly displayed in debug but not in release.

Is a 32GB MicroSD HC 1 still a micro SD HC for stm32F446RE ?

SD card class

What kind of chips can I connect to QuadSPI bus

Re: Switching alternate functions for on input pin

Re: Switching alternate functions for on input pin

Re: Switching alternate functions for on input pin

Re: float correctly displayed in debug but not in release.

Re: Is a 32GB MicroSD HC 1 still a micro SD HC for stm32F446RE ?