求问大神下面的错误是怎么回事?
ERROR:HDLCompiler:806 - "D:\ISEworkingspace\SPI\spi_master.v" Line 279: Syntax error near "ï".
ERROR:HDLCompiler:806 - "D:\ISEworkingspace\SPI\spi_master.v" Line 281: Syntax error near "ï".
ERROR:HDLCompiler:806 - "D:\ISEworkingspace\SPI\spi_master.v" Line 283: Syntax error near "ï".
ERROR:HDLCompiler:346 - "D:\ISEworkingspace\SPI\spi_master.v" Line 281: Default case should appear only once
ERROR:HDLCompiler:346 - "D:\ISEworkingspace\SPI\spi_master.v" Line 283: Default case should appear only once
ERROR:HDLCompiler:346 - "D:\ISEworkingspace\SPI\spi_master.v" Line 285: Default case should appear only once
ERROR:HDLCompiler:346 - "D:\ISEworkingspace\SPI\spi_master.v" Line 286: Default case should appear only once
ERROR:HDLCompiler:598 - "D:\ISEworkingspace\SPI\spi_master.v" Line 21: Module <spi_master> ignored due to previous errors.
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