temp_module.c

来自「* Use 10 MHz crystal frequency. * Use 」· C语言 代码 · 共 52 行

#define TEMPSENSE         0x90
#define ACCESS_CONFIG     0xAC
#define START_CONVERT     0xEE
#define READ_TEMP         0xAA


void ds1621_send0(unsigned char cmd){
  i2c_start();
  i2c_put(TEMPSENSE);
  i2c_put(cmd);
  i2c_stop();
}

void ds1621_send1(unsigned char cmd,unsigned char data){
  i2c_start();
  i2c_put(TEMPSENSE);
  i2c_put(cmd);
  i2c_put(data);
  i2c_stop();
}

unsigned char ds1621_read1(unsigned char cmd){
  unsigned char c;
  i2c_start();
  i2c_put(TEMPSENSE);
  i2c_put(cmd);
  i2c_rstart();
  i2c_put(TEMPSENSE | 0x01);
  c = i2c_get(1);  // NAK read
  i2c_stop();
  return(c);
}


void ds1621_read2(unsigned char cmd, unsigned char *ptr){
  i2c_start();
  i2c_put(TEMPSENSE);
  i2c_put(cmd);
  i2c_rstart();
  i2c_put(TEMPSENSE | 0x01);
  *(ptr+1) = i2c_get(0);  // get MSB, ack
  *(ptr) = i2c_get(1);  // get LSB, nak
  i2c_stop();
}