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NoNamed · 2024-09-13

I was implementing i2c on the stm32f4 to read the as5600 magnetic encoder. Everything ran perfectly for a while, then the I2C got stuck, I check and see that after the start generate, sda transition when the scl still low. I checked many times and t...

NoNamed · 2024-09-03

Im using the stm32f407 discovery to run I2C in fastmode (400kHz), using the equation given in the datasheet, I choose the system clock to be 120Mhz, so I have 30Mhz pclk for I2C. duty cycle T_low/T_high = 2, so CCR is 25d, T_rise is 300ns so that wou...

NoNamed · 2024-06-28

it's been week since I stuck on this problem, I have a board like this , SPI3 MOSI PB5 is connected to ic 74HC594s to drive LEDs, and MISO PB4 is connected to 74AC165D to get the four SW (buttons) for input purpose, and the PB3 for clock on both ICs....

NoNamed · 2024-06-16

All I need is a simple example CAN normal mode, I been searching around but found nothing. It just for educational purpose. Appreciate for any help

NoNamed · 2024-09-14

ah yes my bad, right after generated start, the sda somehow changed before the scl.

NoNamed · 2024-09-03

Thanks so much, after changing the sampling rate, the SCL show perfect 400kHz. Hope you all have a great day

NoNamed · 2024-05-25

First of all, welcome to the community. I skimmed through your code and gotta say its was pretty clean. All are correct, except the lines: //channel 4 selected DMA1_Stream6->CR |= (0x1<<25); DMA1_Stream6->CR |= (0x1<<26); DMA1_Stream6->CR |= (0x1<...

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I2C weird behavior, SDA come high before SCL

I2C clock incorrect

SPI RX with 74HC165

Does anyone has CAN bus register code for F4?

Re: I2C weird behavior, SDA come high before SCL

Re: I2C clock incorrect

Re: DMA1 with UART2 TX not transmitting