i2c_master_send 函数的作用是将数据从主设备发送到指定的 I2C 从设备。这个函数是 I2C 通信中常用的一个 API,用于实现向 I2C 设备发送数据的功能。 2. i2c_master_send函数的返回值类型 i2c_master_send 函数的返回值类型是 int。 3. i2c_master_send函数返回值的具体含义 负值:表示发送数据失败。负值通常是...
While researching #13136, I noticed that s_i2c_send_commands does a "busy wait" while waiting for the interrupt handler to (eventually) finish the i2c transfer.Correct me if I'm wrong, but this isn't very power efficient; at low i2c clock rates, it isn't computationally efficient for o...
I2C - Send Data to Arduino UNOMaterials AmebaD [ AMB23 / AMB21 / AMB22 / BW16 / AW-CU488 Thing Plus / AMB25 / AMB26 ] x 1 Arduino UNOx 1 Example IntroductionThere are two roles in the operation of I2C, one is “master”, the other is “slave”. Only one master is allowed ...
Expand Up@@ -210,12 +210,14 @@ static int raydium_i2c_send(struct i2c_client *client, error=raydium_i2c_xfer(client,addr,xfer,ARRAY_SIZE(xfer)); if(likely(!error)) return0; goto out; msleep(RM_RETRY_DELAY_MS); }while(++tries<RM_MAX_RETRIES); ...
// write_data[1] = writeData;// ex. 0x44 先发命令 后数据。 2表示发送的大小。 if (ret < 0) { ret = i2c_master_send(new_client, write_data, 2); #ifdef CONFIG_TESTCASE_MSG printk("sends command error!! \n"); #endif
I am playing with IOI2CSendRequest and found a couple things I cannot do with it: E-DDC read of EDIDs that are longer than 256 bytes. This requires a transaction with two sends (one for the segment pointer and one for the offset) with a start bit before each and then the reply pre...
Dear NXP community, I am currently trying to debug the NxpNfc stack in the OnePlus Nord open source kernel (GitHub link). Unfortunately the NFC
//I2C Send Function //sends an I2C command to the specified slave voidI2CSend(uint8_t slave_addr, uint8_t num_of_args, ...) { uint8_t i ; // Tell the master module what address it will place on the bus when // communicating with the slave. ...
This will then send the Address + Read bit and prepare to receive bytes from the slave. If the slave really just needs a dummy address, then I don't think that case is covered by Processor Expert I2C_LDD component, so you need to create your own API for this, it should be ...
你看一下函数里面，这个应当是最低位来带代表读还是写吧。你看一下函数原型啊