I2C IIC16位寄存器和16数据的操作

[Tango Tang]

unsigned long gpio_i2c_read16(unsigned char devaddress, int address)
{
unsigned long rxdata;
u8 i2c_buf[8];
struct i2c_msg msgs[2];
struct i2c_adapter *adapter;
if(!mdin_i2c_client) {
printk("mdin_i2c_client not register\n");
return -1;
}
adapter = to_i2c_adapter(mdin_i2c_client->dev.parent);

i2c_buf[0] = (address & 0xff00)>>8;
i2c_buf[1] = address & 0xff;

msgs[0].addr = I2C_MDIN3xx_ADDR>>1;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = i2c_buf;

i2c_buf[0] =i2c_buf[1] = 0;
msgs[1].addr = I2C_MDIN3xx_ADDR>>1;
msgs[1].flags = I2C_M_RD;;
msgs[1].len = 2;
msgs[1].buf = i2c_buf;

if(unlikely(i2c_transfer(adapter, msgs, 2) != 2)) {
return -1;
}

rxdata=(i2c_buf[0]<<8)|i2c_buf[1];
return rxdata;
}

void gpio_i2c_write16(unsigned char devaddress, int address, int data)
{

unsigned char high,low;
u8 i2c_buf[8];
struct i2c_msg msgs[2];
struct i2c_adapter *adapter;

if(!mdin_i2c_client) {
printk("mdin_i2c_client not register\n");
return -1;
}

adapter = to_i2c_adapter(mdin_i2c_client->dev.parent);

i2c_buf[0] = (address & 0xff00)>>8;
i2c_buf[1] = address & 0xff;

msgs[0].addr = I2C_MDIN3xx_ADDR>>1;
msgs[0].flags = 0;
msgs[0].len = 2;
msgs[0].buf = i2c_buf;

i2c_buf[0] = (data & 0xff00)>>8;
i2c_buf[1] = data & 0xff;
msgs[1].addr = I2C_MDIN3xx_ADDR>>1;
msgs[1].flags = 0;
msgs[1].len = 2;
msgs[1].buf = i2c_buf;

if(unlikely(i2c_transfer(adapter, msgs, 2) != 2)) {
return -1;
}
}


16位寄存器，16位数据。读写函数如上，请问我这么写正确吗？我测试了，读函数可以得到数据，写函数不行，但是不会出错，操作的IC是mdin340的。

[fly 100%]

写是不会卡死的 看不到波形不好查

[Tango Tang]

已经解决了，数组没有用对，