?? usart2.h
字號:
/* UART Buffer Defines */
#define USART_RX_BUFFER_SIZE 128 /* 2,4,8,16,32,64,128 or 256 bytes */
#define USART_TX_BUFFER_SIZE 128 /* 2,4,8,16,32,64,128 or 256 bytes */
#define USART_RX_BUFFER_MASK ( USART_RX_BUFFER_SIZE - 1 )
#define USART_TX_BUFFER_MASK ( USART_TX_BUFFER_SIZE - 1 )
#if ( USART_RX_BUFFER_SIZE & USART_RX_BUFFER_MASK )
#error RX buffer size is not a power of 2
#endif
#if ( USART_TX_BUFFER_SIZE & USART_TX_BUFFER_MASK )
#error TX buffer size is not a power of 2
#endif
/* Prototypes */
void USART_Init( unsigned int baudrate );
unsigned char USART_Receive( void );
void USART_Transmit( unsigned char data );
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