don't initialize usart when not debugging

[rsbs2] / bmc / i2c.h

#define BMC_ADDR 0x24

extern volatile unsigned char i2c_databuf[12];
extern volatile uint8_t i2c_len;
extern volatile uint8_t i2c_done;

void i2c_init();
void i2c_send(unsigned char *buf, int len);