Hi lxg,
xiangguo_li@hotmail.com wrote:
hello,
when I choose to use DS1337, I add definitions in header file:
#define CONFIG_RTC_DS1337 #define CFG_I2C_RTC_ADDR 0x68 but, during making process, error appears:
rtc/librtc.a(ds1337.o): in function 'rtc_read': .../rtc/ds1337.c: 172: undefined reference to 'i2c_reg_read' rtc/librtc.a(ds1337.o): in function 'rtc_write': .../rtc/ds1337.c: 178: undefined reference tp 'i2c_reg_write'
how to solve this error?
It would help to know what platform you're building for. The functions mentioned are prototyped in 'i2c.h', but don't appear in all I2C drivers (I'm thinking of the ARM ones that are in drivers/i2c). If you're using a controller that has these functions implemented, you probably don't have your I2C controller properly set up.
Since these functions are always 1-or-2 liner wrappers around i2c_read()/i2c_write() and always do the same thing, it would probably be helpful to implement them as static inlines in include/i2c.h. I'll post a patch to do this some time soon.
regards, Ben