STM32 MCUs Products

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Example script/program for I2C bootloader commands

Hi, I'm using a STM32G07x1 that will need to receive firmware updates from an embedded Linux CPU. The only connection between these devices is an I2C bus so I plan to use the ROM I2C bootloader to handle updates.I am aware of AN4221 that describes ho...

Resolved! STM32F413VGT6 DMA is triggered but no data is copied

Hello,I'm trying to use DMA with an Usart to receive incoming data in a circular buffer. Basically this is my code for configuration using UART5. I can send data, so i assume, that port und clock configuration is correct. When receiving data, NDTR is...

NHand by Associate II
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  • 4 replies
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Resolved! STM32F407VGT6 Ethernet Module: Jambo frame feature?

Hi developers,   I'm new to STM32 MCU, but recently need to use it for a automotive Ethernet board design. The ethernet PHY I am going to use supports the jumbo frame up to 16kByte. Do anyone happen to know if STM32F407VGT6 can also support this jumb...

axdwqerf by Associate
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  • 1 replies
  • 1 kudos

Resolved! SPI dma reads start at index 1 after first read

I'm trying to read and write SPI bytes from an STM32F446RE chip with DMA.  The STM32f4 is the slave and a RPi is the master.  The first SPI read works fine (data read into buffer starting at index 0), but subsequent reads have the data starting at in...

Resolved! stm32g030 RTC/LSI ticks 50% too often

Hi!I use the RTC of a STM32G030K6T. It is clocked by LSI (appr. 32kHz). And PREDIV_A is 0x0 and PREDIV_S is 0x7FFF. So I expect that RTC_SSR overflows every 1.024sec...But: It overflows every 0.687sec... As if the LSI frequency would be 47712Hz...I m...

RRIDDICC by Associate II
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  • 4 replies
  • 2 kudos

Resolved! DMA1 Stream7 DMA2 Stream7

Hi I m using SPI DMA on H7 series, and notice under SPIx_TX and SPIx_RX there are at least 14 DMA channels to choose from, i.e DMA1 Stream 0-7 and DMA2 0-7. Can i select these "channel"  randomly or is there a reference manual that state otherwise? L...