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官方TRM中提到NUC230/240的UART0有提供到64 Bytes的接收缓冲区,UART1及UART2只提供了16Bytes的接收缓冲区,但uart.h文件中RFITL设定仅供到14 Bytes
想问如果想使用64 Bytes FIFO该如何设定,谢谢 /*---------------------------------------------------------------------------------------------------------*/ /* UART FIFO size constants definitions */ /*---------------------------------------------------------------------------------------------------------*/ #define UART0_FIFO_SIZE 64 /*!< UART0 supports separated receive/transmit 64/64 bytes entry FIFO */ #define UART1_FIFO_SIZE 16 /*!< UART1 supports separated receive/transmit 16/16 bytes entry FIFO */ #define UART2_FIFO_SIZE 16 /*!< UART2 supports separated receive/transmit 16/16 bytes entry FIFO */ /*---------------------------------------------------------------------------------------------------------*/ /* UA_FCR constants definitions */ /*---------------------------------------------------------------------------------------------------------*/ #define UART_FCR_RFITL_1BYTE (0x0 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 1 bit */ #define UART_FCR_RFITL_4BYTES (0x1 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 4 bits */ #define UART_FCR_RFITL_8BYTES (0x2 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 8 bits */ #define UART_FCR_RFITL_14BYTES (0x3 << UART_FCR_RFITL_Pos) /*!< UA_FCR setting to set RX FIFO Trigger Level to 14 bits */ #define UART_FCR_RTS_TRI_LEV_1BYTE (0x0 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 1 bit */ #define UART_FCR_RTS_TRI_LEV_4BYTES (0x1 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 4 bits */ #define UART_FCR_RTS_TRI_LEV_8BYTES (0x2 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 8 bits */ #define UART_FCR_RTS_TRI_LEV_14BYTES (0x3 << UART_FCR_RTS_TRI_LEV_Pos) /*!< UA_FCR setting to set RTS Trigger Level to 14 bits */ |
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nbsp; */#define UART_FIFO_1BYTES (0x0ul << UART_FCR_RFITL_Pos) /*!< UART_FIFO_DEPTH = 1 byte */#define UART_FIFO_4BYTES (0x1ul << UART_FCR_RFITL_Pos) /*!< UART_FIFO_DEPTH = 4 bytes */#define UART_FIFO_8BYTES (0x2ul << UART_FCR_RFITL_Pos) /*!< UART_FIFO_DEPTH = 8 bytes */#define UART_FIFO_14BYTES (0x3ul << UART_FCR_RFITL_Pos) /*!< UART_FIFO_DEPTH = 14 bytes *//*---------------------------------------------------------------------------------------------------------*/根据uart.h文件中的定义,NUC230/240的UART0最大接收缓冲区为14 Bytes,而未提供64 Bytes的选项。因此,需要针对该功能进行特殊编程,或使用别的方式实现所需的64 Bytes缓冲区。
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