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U2
i want this mcu to be fully ready to inject code in it
hamsli

hamsli

@copilot i want this mcu to be fully ready to inject code in it
2y

copilot

To prepare the STM32G071RBT6 for programming, you'll need to make some basic connections:
  1. Supply Power: Connect IC1:8 (VDD/VDDA) to your 3.3V power supply, and IC1:9 (VSS/VSSA) to ground. This is because STM32G071RBT6 typically operates at 3.3V.
  2. Reset Circuit: Connect a pull-up resistor (10kΩ) between IC1:12 (PF2-NRST) and 3.3V. Also, connect a capacitor (100nF) between IC1:12 (PF2-NRST) and Ground. This will create a basic RC reset circuit.
  3. Boot Mode: Connect IC1:46 (PA14-BOOT0) to GND to allow the MCU to boot from Flash memory.
  4. Oscillator: If external crystal oscillator is needed, connect it to IC1:10 (PF0-OSC_IN) and IC1:11 (PF1-OSC_OUT). The specific connections will depend on the type of oscillator being used.
  5. Programming Interface: For programming/debugging, connect the SWDIO, SWCLK, GND, and VDD from a compatible programmer (like ST-LINK/V2) to IC1:45 (PA13) , IC1:44 (PA14-BOOT0), IC1:9 (VSS/VSSA), and IC1:8 (VDD/VDDA) respectively.
Please note, these are very basic steps and may change based on your specific application needs. Since we currently don't have access to the datasheets of the STM32G071RBT6, be sure to consult the datasheet for full details.
2y
1
connect this ic to the stm32
hamsli

hamsli

@copilot connect this ic to the stm32
2y

copilot

Sure, I can help you with that. The IC in question appears to be a UM232R from FTDI, which is a USB to serial UART (Universal Asynchronous Receiver Transmitter) module.
It's generally used to provide a USB interface for microcontrollers that only have a UART interface. In your setup, the STM32L072RBT6 microcontroller has a USART (Universal Synchronous/Asynchronous Receiver Transmitter) interface, which can operate in UART mode.
Here are the connections you need to make:
  1. Power and Ground
    • Connect U2:19 (3V3) and U1:19 (VDD)
    • Connect U2:7 (GND) and U1:63 (VSS)
  2. Data Lines
    • Connect U2:1 (TXD) to U1:42 (PA9), the USART1_RX pin on the microcontroller (MCU)
    • Connect U2:5 (RXD) to U1:41 (PA8), the USART1_TX pin on the MCU
  3. Optional Reset line - if you want the MCU to be able to reset the FT232R
    • Connect U2:20 (~RST#) to an available GPIO pin on the MCU (for example, U1:2 (PC13))
  4. USB Lines
    • Connect U2:14 (USB) to your PCB's USB connector
If you want to use hardware flow control (also known as handshaking), which can help with communication reliability in some cases, you'll need to connect two more pairs of pins:
  1. Optional Flow Control
    • Connect U2:3 (~RTS#) to U1:16 (PA2), the USART1_RTS pin on the MCU
    • Connect U2:10 (~CTS#) to U1:15 (PA1), the USART1_CTS pin on the MCU
Remember to properly configure the USART peripheral on the STM32 to match the settings used by the FT232R (e.g., baud rate, data bits, stop bits, and parity).
The above connections are based on using USART1 on the STM32. If another USART is used, adjust the MCU pin connections accordingly. It's also important to note that we've assumed the use of certain MCU pins based on their functions-as-per-the datasheet, ensure that these pins aren't actually being employed for different functionality in your specific project. The datasheet excerpts for the FT232R were helpful in creating this suggestion[1][2].
[1] Page 21
[2] Page 10
2y
5
U1

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