11/20/2020 0 Comments Stm32 Hal Uart Example
The polling can be an ineffective method, because it may occupy CPU period.Before the transmission, please make sure the web host and the slave using the same baud rate.
Stm32 Hal Uart Example Serial Communication SettingsTypically, there are two basic serial communication settings, synchronous communication and asynchronous conversation.For asynchronous communication, the sent data should become in a format of startbit information little bit paritybit cease bit.Arranged the baud rate to 115200 Bitss, transmitting data duration to 8 Little bit. In the document usart.c, you can discover the initialization function MXUSART1UARTInit(void) and flag construction functionHALUARTMspInit(). You should redefine the result functions in the regular collection to carry out serial result or LCD output. For example, to result the function printf to serial slot, you should steer the result of the functionality fputc to the serial interface (redirect). Add a functionality int fputc(int ch, FILE n) and make sure the serial slot can output character. If making use of GUNC compiler, PUTCHARPROTOTYPE should be described as the functionality intioputchar(int ch), or else it should be described as the functionint fputc(int ch, FILE f). In the document stm32f7xxhaluart.chemical, you can discover the function HALUARTTransmit. Link the table to your Computer with a USB cable connection, and run the serial assistant on the Computer. Choose the related serial port number, and arranged the baud rate to 115200. Pressed the Reset to zero switch, you may get the information as the number shows beneath. HALUARTTransmitIT(); data transmission under serial interrupt setting. HALUARTTransmitDMA(); information transmitting under serial DMA mode. HALUARTTxHalfCpltCallback():When half information transmitting (half exchange) is definitely completed, it will become called by interrupt deal with function. HALUARTTxCpltCallback(): When information transmission can be finished, it will end up being called by interrupt deal with function. HALUARTRxHalfCpltCallback(): When half data wedding reception (half move) is certainly completed, it will become known as by interrupt handle function. HALUARTRxCpltCallback(): When information reception is certainly finished, it will end up being called by interrupt deal with function. HALUARTErrorCallback():When there is error in the program of information transfer, When information transmission will be finished, it will end up being known as by interrupt deal with function. For instance, CPU can be querying the serial slot whether the information transmission has finished. If transmission is definitely over time, the timeout mistake will be returned.
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