The ST-Link v2 is a versatile programming and debugging tool designed for STM32 microcontrollers. It provides a seamless interface for developers to upload firmware, debug applications, and monitor real-time performance via a USB connection. Compact and easy to use, the ST-Link v2 is an essential tool for embedded systems development.
The ST-Link v2 typically uses a 4-pin or 6-pin header for connecting to the target microcontroller. Below is the pinout for the 4-pin SWD interface:
Pin | Name | Description |
---|---|---|
1 | VCC | Target voltage reference (1.65V–3.6V). |
2 | SWDIO | Serial Wire Debug Input/Output. |
3 | GND | Ground connection. |
4 | SWCLK | Serial Wire Debug Clock. |
For the 6-pin JTAG interface, the additional pins are:
Pin | Name | Description |
---|---|---|
5 | TDI | JTAG Test Data Input. |
6 | TDO | JTAG Test Data Output. |
Connect the ST-Link v2 to the Target Microcontroller:
Install Required Software:
Power the Target Device:
Program the Microcontroller:
Debugging:
The ST-Link v2 can also be used to program STM32 microcontrollers via the Arduino IDE. Below is an example of uploading a simple "Blink" program to an STM32 board:
// Example: Blink an LED on an STM32 board using Arduino IDE
// Ensure the ST-Link v2 is connected to the STM32 board via SWD interface.
void setup() {
pinMode(LED_BUILTIN, OUTPUT); // Set the built-in LED pin as output
}
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // Turn the LED on
delay(1000); // Wait for 1 second
digitalWrite(LED_BUILTIN, LOW); // Turn the LED off
delay(1000); // Wait for 1 second
}
To upload this code:
ST-Link v2 Not Detected by the IDE:
Programming Fails or Debugger Disconnects:
Target Microcontroller Not Responding:
Firmware Update Required:
Q: Can the ST-Link v2 power the target microcontroller?
A: The ST-Link v2 can provide a reference voltage (VCC) but is not designed to power the target device. Use an external power source for the microcontroller.
Q: Is the ST-Link v2 compatible with non-STM32 microcontrollers?
A: The ST-Link v2 is primarily designed for STM32 devices. However, it may work with other ARM Cortex-M microcontrollers using OpenOCD.
Q: How do I update the ST-Link v2 firmware?
A: Download the ST-Link Utility from the STMicroelectronics website, connect the ST-Link v2, and follow the on-screen instructions to update the firmware.
Q: Can I use the ST-Link v2 with Linux?
A: Yes, the ST-Link v2 is compatible with Linux. Install OpenOCD or other compatible tools to use it on Linux systems.