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Ϊʲôioctl(fd,I2C_SLAVE,0x50) ÕýÈ·£¬Õâ¸öÊÇEEPROM
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switch(cmd){
case I2C_SLAVE:
case I2C_SLAVE_FORCE:
if((arg>0x3ff)||
(((client->flags&I2C_M_TEN)==0)&&arg>0x7f)
return -EINVAL;
.....
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at91_i2c: timeout 3
¶øwriteº¯ÊýÈ´·µ»Øsuccess
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