Roy_01
38 lines
846 B
Markdown
38 lines
846 B
Markdown
uart_polling
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---
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This is an example of UART polling
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+ Select the UART TX/RX pins
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```
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// in main.c
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#define CONFIG_UART_IO_TX_PORT GPIOA
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#define CONFIG_UART_IO_TX_PIN GPIO_Pin_01
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#define CONFIG_UART_IO_TX_AF_MODE GPIO_AF_1
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#define CONFIG_UART_IO_RX_PORT GPIOA
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#define CONFIG_UART_IO_RX_PIN GPIO_Pin_00
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#define CONFIG_UART_IO_RX_AF_MODE GPIO_AF_1
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```
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+ Configure the parameters related to UART
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+ It can be modified according to the requirements
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```
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// in main.c
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#define CONFIG_BAUD_RATE_VALUE 38400
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UART_WordLength_8b //Data bit 8
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UART_StopBits_1 //Stop bit 1
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UART_Parity_No //No check bit
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UART_Mode_TxRx //Transmit-Receive Mode
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```
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## Log
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Use serial port with baudrate 38400, 8bit, no parity check
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+ PC sends 1~255 to PEC930
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+ PEC930 receives and sends back data
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