ͨѶڣI2C

1.    ƼĴҪУI2CCONݼĴI2CBUF

2.    ʼSystem_Init.incļУûɸݾӦ޸á

3.    ܽܣQT8S745 Ϊӻͨ I2C ӿڶ RAM жд

:
        ϵͳʼʱӼ˿ŹܲRAM㡣
	IO˿,Ϊʹܣģʽ
	ʹܴͨѶ I2CEN = 1
	ôӻַ 0xA0
	жʹãʹI2Cжϣжϡ	
	жR_W=1͵࣬R_W=0(д)ͽТߡ
	D_A=0 ӻдַȡI2CBUFТ᣻
	  D_A=1 ӻдݣ־־Ϊ1ȡI2CBUFд뻺ַĴТ᣻
          ־Ϊ0ȡI2CBUFд뻺ַ+1Тᡣ
	NACK=1дI2CBUFַ-1ϴд뻺 δͣТ᣻
	  NACK=0ȡݣд I2CBUFַ+1Тᡣ
	ظޡ

