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These APIs are : HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout) In Polling mode IO operation of UART module of STM32 Blue Pill, HAL_UART_Transmit() is used to send an amount of data in blocking mode HAL_UART_Receive() is used to receive an amount of data in blocking mode. HAL_UART_Transmit(&huart1, message, sizeof(message), 100) Sprintf(message, "Welcome to lab! Counting = %d\r\n", num) You can read these articles on these links:
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In the last tutorials, we have seen how to use STM32 Blue Pill GPIO pins as digital output or digital input pins. Furthermore, many wireless devices such as GSM, GPS, Bluetooth, Xbee, LoRA, and many others provide a serial interface to transfer data between these devices and a microcontroller. One of the most important applications is to display data on the serial console of the computer for debugging or logging important events during program execution on a microcontroller. We often use UART/USART to transfer data between microcontroller and computer for various purposes. Whenever we work on embedded system applications development sooner or later we need to use a serial communication protocol. Why use the UART Port of the STM32 Blue Pill? STM32 Blue Pill UART Data Receive Example.
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Connecting ST-Link Programmer with STM32.Serial Data Print with STM32 Blue Pill Code.STM32 Blue Pill UART Data Transmit Example.Connect FTDI USB to Serial with STM32 Blue Pill.Why use the UART Port of the STM32 Blue Pill?.