STM32 MPUs Embedded software

cancel
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

Resolved! Is it possible to use i2c1 (0x40012000) in tf-a?

Hi!As far as I looked into the source code, only is i2c4 is used for communication to pmic.Our custom board has an external PLL connected to i2c1. The PLL needs an initial configuraion to provide 48MHz.It would be ideal if I could do this during tf-a...

GLaure by Senior
  • 506 Views
  • 2 replies
  • 0 kudos

Resolved! STM32MP1 - I2C frequency too low

In my device tree, we config 400KHz, but on scope we see only ~ 50Hz, and the clock seems weird. Anyone know why? &i2c1 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c1_pins_a>; pinctrl-1 = <&i2c1_sleep_pins_a>; i2c-scl-rising-time-ns = <185>...

_legacyfs_online_stmicro_images_0693W00000bjEZXQA2.png
Dat Tran by Senior II
  • 419 Views
  • 4 replies
  • 0 kudos

Max clock for I2C for stm32mp157a

I have several questions first one is what is the max clock for I2C, minimum is pointed at this sheet but what is the max?Again for the same sheet for the LCD-TFT controller, I will be using 1.8V LVDS display so fclk frequency will be 45 MHz max righ...

Gencay by Associate III
  • 364 Views
  • 1 replies
  • 0 kudos