![]() ![]() In the Pinout view, click on each of these pins and select their I2C alternate functions. The X-NUCLEO-53L1A1 expansion board communicates with the MCU via the I2C1 peripheral on pins PB8 ( I2C1SCL ) and PB9 ( I2C1SDA ). G) In order to generate the Stop/Restart condition, software must set the STOP/START bitĪfter reading the second last data byte (after the second last RxNE event) Figure 1: Creating a new STM32Cube project for the NUCLEO-F103RB board. STM32F103VB6 has an ARM Cortex M3 chip and has the following resources: 128 kB flash memory and 20 kB SRAM memory 80 I/O ports 2 12-bit ADC 7 DMA channel 7 timers, 2 I2C interfaces, 3 USARTs, 2 SPIs, USB 2. But as said the MCUs I2C address can be set from software through dedicated registers. In this tutorial, we will be using a development board based on STM32F103VB6 chip. Second last data byte (after second last RxNE event) 1 Answer Sorted by: 4 You should have searched the Reference Manua l of the controller. Let’s see the detail about the steps /**** STEPS FOLLOWED ************Ī) Write the slave Address, and wait for the ADDR bit (bit 1 in SR1) to be setī) the Acknowledge disable is made during EV6 (before ADDR flag is cleared) and the STOP condition generation is made after EV6Ĭ) Wait for the RXNE (Receive Buffer not Empty) bit to setī) Clear the ADDR bit by reading the SR1 and SR2 RegistersĬ) Wait for the RXNE (Receive buffer not empty) bit to setĮ) Generate the Acknowlegment by settint the ACK (bit 10 in SR1)į) To generate the nonacknowledge pulse after the last received data byte, the ACK bit must be cleared just after reading the It is used to read the data from the device. Create a USB-PD Source application with the NUCLEO-G0B1RE board and the X-NUCLEO-SRC1M1 shield by using STM32CubeIDE software Prerequisites. And at last, but not least, hook up a simple logic analyzer for deeper time-related debugging (saleae for example, or build one using the). Then, try other i2c pins (each board have more than one, see product pages). NXP divides the I2C peripherals portfolio into twelve families, one for each of the most common. If all the i2c peripherals are working properly, the problem is at Nucleo. I2C_Read is probably the most complicated part. board (PCB) design complexity and reduces system cost. ![]()
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