一、数据格式
通过I2C模式下载，I2C设备地址是“0xc0“。
每一个设置参数都有固定格式，
比如： 0XFCF3 + 0X3B +0X1E34 +0X008B
蓝色参数表示 ：写动作 ； 红色参数表示 ：写入的地址 ；绿色参数表示：写入的值
以上是每个配置参数的格式，然后还有一次写入的格式
必须以 0XFCF3 + 0X3B +0X1E34 +0X008B 开头；以 0XFCF3 + 0X3B +0X22FB +0X0000结尾。
如果想要读等操作可以对照下图：
二、代码例程
static int fm1288_i2c_init(void)
{
int ret = -1;
struct i2c_msg msgs[] = {
{
.addr = 0x60,
.flags = 0,
.len = sizeof(fm1288_init_data),
.buf = fm1288_init_data,
},
};
if(fm1288 != NULL)
{
int i = 0;
for(i = 0; i< 3; i ++)
{
ret = i2c_transfer(fm1288->client->adapter, msgs, 1);
if (ret < 0)
dev_err(&fm1288->client->dev, "%s:ret=%d,i=%d, i2c write error.\n", __func__,ret,i);
}
FROTE_MEDIA_FUNC("ret = %d", ret);
return 0;
}
return ret;
}
static int fm1288_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
int err = 0;
FROTE_MEDIA_FUNC("fm1288_probe");
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
printk(KERN_ERR "SENODIA fm1288_probe: check_functionality failed.\n");
err = -ENODEV;
goto exit0;
}
/* Allocate memory for driver data */
fm1288 = kzalloc(sizeof(struct fm1288_data), GFP_KERNEL);
if (!fm1288) {
printk(KERN_ERR "SENODIA fm1288_probe: memory allocation failed.\n");
err = -ENOMEM;
goto exit0;
}
fm1288->client = client;
i2c_set_clientdata(client, fm1288);
if (client->dev.of_node) {
err = fm1288_parse_dt(&client->dev);
if (err) {
dev_err(&client->dev, "DT parsing failed, err = %d\n", err);
goto err_parse_dt;
}
}
msleep(20);
err = fm1288_gpio_configure();
if(err){
dev_err(&client->dev, "gpio configure failed,err = %d\n", err);
goto err_gpio_configure;
}
msleep(20);
gpio_direction_output(fm1288->reset_gpio, 1);
msleep(20);
err = fm1288_i2c_init();
if(err){
dev_err(&client->dev, "fm1288 init failed,err = %d\n", err);
goto err_gpio_configure;
}
err_gpio_configure:
err_power_on:
//fm1288_power_init(false);
err_power_init:
/*
if (!IS_ERR_OR_NULL(fm1288->fm1288_pinctrl)) {
devm_pinctrl_put(fm1288->fm1288_pinctrl);
fm1288->fm1288_pinctrl = NULL;
}
*/
err_parse_dt:
kfree(fm1288);
fm1288 = NULL;
exit0:
return err;
}