The STR91X-SK/HIT is a versatile and powerful development board that can be used for a variety of applications, from industrial automation to consumer electronics. This board is based on the STMicroelectronics STR912FAW44 microcontroller and features 512KB of Flash memory, 96KB of SRAM, and a variety of interfaces and peripherals.

In this tutorial, we'll provide an overview of the STR91X-SK/HIT board and its capabilities, and then walk you through the process of setting up a development environment, writing some basic code, and testing it on the board.

Overview of the STR91X-SK/HIT Board

The STR91X-SK/HIT board is a development platform that is designed to help engineers and hobbyists get started with the STR912FAW44 microcontroller. This board features a variety of interfaces and peripherals, including:

USB connection for programming and debugging

Ethernet interface for networking

Serial and CAN interfaces for communication

LCD and touch screen displays for user input and output

Audio interfaces for sound input and output

MicroSD card slot for storage

In addition to these hardware features, the board also comes with a variety of software tools and libraries to help you get started with programming the microcontroller.

Setting Up Your Development Environment

Before you can start programming the STR912FAW44 microcontroller, you'll need to set up a development environment. Here are the steps you'll need to follow:

1. Download and install the Keil μVision IDE from the STMicroelectronics website.

2. Connect the STR91X-SK/HIT board to your computer using a USB cable.

3. Open the Keil μVision IDE and create a new project for the STR912FAW44 microcontroller.

4. Configure the project settings and select the appropriate compiler and debugger options.

5. Write some basic code to blink an LED on the board, and then compile and debug the code.

Writing Your First Program

Now that you have your development environment set up, it's time to start writing some code. Here's an example program that will blink an LED on the board:

include include "STR91x.h"int main(void){ /Enable the clock for the GPIO module / SCU_APBPeriphClockConfig(__GPIO3, ENABLE); /Configure GPIO3 Pin 0 as an output pin / GPIO_Init(GPIO3, GPIO_Pin_0, GPIO_Mode_Out_PP_Low_Fast); /Loop forever / while (1) { /Toggle the LED / GPIO_WriteBit(GPIO3, GPIO_Pin_0, (BitAction)(1 - GPIO_ReadInputDataBit(GPIO3, GPIO_Pin_0))); /Delay for a little bit / for (int i = 0; i < 1000000; i++); }}

This code uses the GPIO3 module to toggle an LED on and off in an infinite loop. Note that we need to enable the clock for the GPIO module and configure the pin as an output pin before we can use it. We also need to use a delay loop to slow down the blinking so that we can see it.

Testing Your Code on the Board

Now that you have written your code, it's time to test it on the board. Here are the steps you'll need to follow:

1. Connect the board to your computer using a USB cable.

2. Build your code in the Keil μVision IDE.

3. Download your code to the board using the ST-Link Utility.

4. Reset the board.

5. Watch the LED blink!

Conclusion

The STR91X-SK/HIT is a powerful and versatile development board that can be used for a wide range of applications. By following the steps outlined in this tutorial, you can get started with programming the board and exploring its capabilities. Whether you're an experienced engineer or a hobbyist looking to learn more about microcontrollers, the STR91X-SK/HIT is a great platform to work with.