Contents
What are the HAL functions of STM32 I2C?
STM32 I2C HAL Functions APIs 9.1 1. STM32 I2C “Blocking” HAL Functions (Blocking Mode) 9.2 2. STM32 I2C Interrupt Mode HAL Functions (Non-Blocking Mode) 9.3 3. STM32 I2C DMA Mode HAL Functions (Non-Blocking Mode) 9.4 4. STM32 I2C Device Check 1. Introduction To I2C Communication
Which is stm32f4xx Hal conf.h file?
File Description stm32f4xx_hal_conf.h This file allows the user to customize the HAL drivers for a specific application. It is not mandatory to modify this configuration. The application can use the default configuration without any modification. stm32f4xx_it.c/.h
What’s the I2C address of a Hal device?
Try at 100KHz first, and then increase to 400KHz. The I2C address of the device is 0x18 (if SDO is grounded, which I assume it is). But in the HAL driver, you have to define: What you want to do is to read a register, so don’t use HAL_I2C_Master_Receive or HAL_I2C_Master_Transmit, but HAL_I2C_Mem_Read or HAL_I2C_Mem_Write, like this:
How to use STM32 I2C in slave mode?
3.3 STM32 I2C In Slave Mode By default, the I2C interface operates in Slave mode. To switch from default Slave mode to Master mode a Start condition generation is needed. The peripheral input clock must be programmed in the I2C_CR2 register in order to generate correct timings.
Is there anything wrong with my I2C code?
In reality, there is nothing wrong with your code and simply removing and re-applying the power to the entire board will cause both the master and slave to be reset, leaving you able to communicate again.
Where did the I2C communication protocol come from?
I2C (i-square-c) is an acronym for “Inter-Integrated-Circuit” which was originally created by Philips Semiconductors (now NXP) back in 1982. I2CTM is a registered trademark for its respective owner and maybe it was the reason they call it “Two Wire Interface (TWI)” in some microcontrollers like Atmel AVR.
How are STM32 I2C interrupts connected to the interrupt vector?
STM32 I2C Interrupts The I2C interrupt events are connected to the same interrupt vector. So the I2C fires a single interrupt signal regardless of the source of it. The software will have to detect it.