msgs[1].len = data_len; msgs[1].buf = buffer;ret= i2c_transfer(client- >adapter, &msgs[1], 1);if(ret< 0) dev_err(&client- >adapter- >dev,"i2c read failedn");elsememcpy(data, buffer, data_len); kfree(buffer);returnret; }...
这时需要调用两次 i2c_transfer, I2C read 拆分成两次,修改如下: 复制 staticinti2c_read_bytes(structi2c_client*client,u8cmd,u8*data,u8data_len) {structi2c_msgmsgs[2];intret;u8*buffer;buffer=kzalloc(data_len,GFP_KERNEL);if(!buffer)return-ENOMEM;msgs[0].addr=client->addr;msgs[0].flags=clien...
atmel_mxt_ts 2-004c: __mxt_read_reg: i2c transfer failed atmel_mxt_ts: probe of 2-004c failed with error -5 Thank you, Jigar Chokshi Original Attachment has been moved to: atmel_mxt_ts.c.zip Original Attachment has been moved to: board-mx6q_sabreauto.c.zip Labels: i.MX6_All...
static int32_t LinuxI2cTransfer(struct I2cCntlr *cntlr, struct I2cMsg *msgs, int16_t count);// 定义I2cMethod结构体变量g_method,实现i2c相应接口static struct I2cMethod g_method = { .transfer = LinuxI2cTransfer,}; static int32_t LinuxI2cBind(struct HdfDeviceObject *device);static int32_t ...
1、新建项目RA6M4-mpu6050工程 2、点击RT-theard Setting,在软件包下添加软件包,然后搜索mpu相关软件支持包,点击添加即可,然后出现对应包。 3、配置ssd306,右键选择配置项 4、在软件包中开启示例程序。 5、在硬件中,启动I2C,设置端口SDA—-p505;SCL—-p506 ...
HDF_LOGE("I2cOpen: failed\n"); return; } 1. 2. 3. 4. 5. 6. 7. 8. (2)I2cClose I2C通信完成之后,需要关闭I2C控制器。 void I2cClose(DevHandle handle); 1. I2cClose参数定义如下: (3)I2cTransfer i2c消息传输。 int32_t I2cTransfer(DevHandle handle, struct I2cMsg \*msgs, int16_t co...
6. 7. 8. 9. 10. 11. 12. 13. 现在基本上都使用设备树 2.2 I2C 设备数据收发处理流程 通过i2c_transfer 函数对I2C 设备寄存器进行读写操作。使用 i2c_transfer 函数发送数据之前要先构建好 i2c_msg。 示例代码:I2C 设备多寄存器数据读写 1 /* 设备结构体 */ ...
如果你是C8051单片机学习爱好者，程序如下附件，我们可以讨论下。急需帮助啊~~~ //-Pinout: //P0.0->SDA(SMBus) //P0.1->SCL(SMBus) // //P1.6->LED //--- //Includes //--- #include<C8051F020.h>//SFRdeclarations //--
(&pdev->dev, "failed to add bus to i2c core\n"); 121 goto err_cpufreq; 122 } 123 124 platform_set_drvdata(pdev, i2c); // 将s3c24xx_i2c变量作为平台设备私有数据中的设备驱动私有数据 dev->p->driver_data 125 // 因为这个变量还会在本文件中其他函数中会用到了 126 clk_disable(i2c-...
ret = i2c_transfer(client->adapter, msg, 2); if(ret == 2) { ret = 0; } else { printk("i2c rd failed=%d reg=%06x len=%d\n",ret, reg, len); ret = -EREMOTEIO; } return ret; } /* * @description : 向ap3216c多个寄存器写入数据 ...