i2cmsu.h

来自「* Use 10 MHz crystal frequency. * Use 」· C头文件 代码 · 共 53 行

#ifndef I2CMSU_H
#define I2CMSU_H


/* I2C  Functions

  i2c_idle();      -- waits for idle condition on i2c interface
  i2c_start();     -- sends start and waits for finish of start
  i2c_rstart();     -- sends repeated start and waits for finish of repeated start
  extern i2c_stop(); -- sends stop and waits for finish of stop
  i2c_ack(unsigned char ackbit); -- do acknowledge

  i2c_putbyte(unsigned char byte);  -- sends byte on i2c bus, check idle first
  i2c_put(unsigned char byte); -- same as previous, do not check idle
  i2c_put_noerr(unsigned char byte); -- do not reset on ack error

  unsigned char i2c_getbyte(unsigned char ackbit); -- read byte from i2c bus, do ack
  
 char i2c_ackerr; -- variable that tracks current operation

 void i2c_print_err();  -- print error message based on i2c_ackerr value

These functions assume the WatchDogTimer is in operation, and that the
i2c_ackerr variable can be used to identify which function was being
executed if the WDT timer timeout within one of these functions.


*/

void i2c_idle(void);
void i2c_start(void);
void i2c_rstart(void);
void i2c_stop(void);
void i2c_ack(unsigned char ackbit);

unsigned char i2c_putbyte(unsigned char byte);
unsigned char i2c_put(unsigned char byte);
unsigned char i2c_put_noerr(unsigned char byte);


unsigned char i2c_get(unsigned char ackbit);
unsigned char i2c_getbyte(unsigned char ackbit);
void i2c_print_err(void);

extern char i2c_ackerr;

#endif