//-----SDA 数据线上的数据存入寄存器，数据在SCL的高电平有效-------------
task shift_in;
output [7:0] shift;
begin
@ (posedge scl) shift[7] = sda;
@ (posedge scl) shift[6] = sda;
@ (posedge scl) shift[5] = sda;
@ (posedge scl) shift[4] = sda;
@ (posedge scl) shift[3] = sda;
@ (posedge scl) shift[2] = sda;
@ (posedge scl) shift[1] = sda;
@ (posedge scl) shift[0] = sda;
@ (negedge scl)
begin
#`timeslice ;
out_flag = 1; //应答信号输出
sda_buf = 0;
end
@(negedge scl)
#`timeslice out_flag = 0;
end
endtask
@ (negedge scl) 在任务里面怎么用，编译的时候出现错误
eeprom.v" line 140: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 141: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 142: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 143: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 144: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 145: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 146: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 147: Unsupported Event Control Statement.
ERROR:Xst:850 - "eeprom.v" line 148: Unsupported Event Control Statement.
那位老兄帮帮忙啊？谢谢，这是夏宇闻书里I2C总线那章的一个例子？
随便问一下 系统函数DISABLE怎么也不可以用啊？ | 
