[FRDM KL02Z]I2C使用心得

andrewz

由于KL02Z上面有两个I2C设备,为此,好好学习了一下I2C的编程.

通常要实现I2C,需要10个左右的函数.可用软件模拟及硬件实现.

每个硬件设备的I2C顺序不同.不用企图用一个通用的顺序实现.

下面就是自己总结的I2C可能用到的10个函数.再具体,就得自己一步一步调试咯~

//set pins:enable clock:set baudrate:enable.

void Init(void);

//set master mode:set transmit mode:send start signal.

void Start(void);

//resend start signal.

void Restart(void);

//set slave mode:set receive mode:send stop signal.

void Stop(void);

//W data to DATA register.

void Write(u8);

//R data from DATA register.

u8 Read(void);

////set the device address:set operation direction:write to I2C.

u8 Send7bitAddress(u7 add,u1 dir);

//wait for transmit finish:wait for ACK:check RXAK.

u8 WaitAck(void);

//check the busy state(remembered by MCU).

u8 IsBusy(void);

//set ACK is included on the following receiving byte.

void Ack(void);

//set ACK is excluded.

void Nack(void);

//set Receive or transmit mode.

void SetMasterDir(u1);

//Start:Send7bitAddress:WaitAck:Stop.

u8 Probe(u7 add);

//Start:Send7bitAddress:WaitAck:send sub_add:Restart:Send7bitAddress:SetMasterDir:Read:Ack:WaitAck:Stop.

u8 ReadArray(u7 add,u32 sub_add,u8 sub_add_len,u8* buf,u32 buf_len);

//Start:Send7bitAddress:WaitAck:send sub_add:send data:Stop.

u8 WriteArray(u7 add,u32 sub_add,u8 sub_add_len,u8* buf,u32 buf_len);

ReadByte();

WriteByte();

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浪迹天涯123

不错                       

andrewz

浪迹天涯123 发表于 2016-3-3 12:05
不错

谢谢~
之前用过SPI觉的SPI很厉害了.
现在学了I2C觉得I2C更厉害...

liu553824989

学习了