void InitADS1115()
{
I2c_Init();
uint8_t conf[2];
//Request
I2C_StartTransmission(I2C1,I2C_Direction_Transmitter,0x90);
I2C_Write_Data(I2C1,0x01);
I2C_GenerateSTOP(I2C1,ENABLE);
//Response
I2C_StartTransmission(I2C1,I2C_Direction_Receiver,0x90);
conf[0] = I2C_Read_ack(I2C1);
conf[1] = I2C_Read_nack(I2C1);
I2C_GenerateSTOP(I2C1,ENABLE);
}
uint_fast16_t getData(uint8_t number)
{
uint8_t i2c_data[2];
//Request
I2C_StartTransmission(I2C1,I2C_Direction_Transmitter,0x90);
I2C_Write_Data(I2C1,0x00);
I2C_GenerateSTOP(I2C1,ENABLE);
//Response
I2C_StartTransmission(I2C1,I2C_Direction_Receiver,0x90);
i2c_data[0] = I2C_Read_ack(I2C1);
i2c_data[1] = I2C_Read_nack(I2C1);
uint_fast16_t adc = i2c_data[0] << 8 | i2c_data[1];
//I2C_GenerateSTOP(I2C1,ENABLE);
return adc;
}
//ADS1115 have 4 channel. We can select on of them in one moment.
void selectInput(uint8_t number)
{
uint8_t conf[2];
conf[1] = 227;
//create config for selecting channel
if(number == 0)
{
conf[0] = 195;
}
if(number == 1)
{
conf[0] = 211;
}
if(number == 2)
{
conf[0] = 227;
}
if(number == 3)
{
conf[0] = 243;
}
//send config
I2C_StartTransmission(I2C1,I2C_Direction_Transmitter,0x90);
I2C_Write_Data(I2C1,0x01);
I2C_Write_Data(I2C1,conf[0]);
I2C_Write_Data(I2C1,conf[1]);
//I2C_GenerateSTOP(I2C1,ENABLE);
}
/*************************************************************************
* 野火嵌入式开发工作室
*
* 函数名称：I2C_WriteAddr
* 功能说明：写入一个字节数据到I2C设备指定寄存器地址
* 参数说明：I2Cn 模块号（I2C0、I2C1）
* SlaveID 7位从机地址
* Addr 从机的寄存器地址
* Data 数据
* 函数返回：无
* 修改时间：2012-1-20
* 备 注：
*************************************************************************/
void I2C_WriteAddr(I2Cn i2cn, u8 SlaveID, u8 Addr, u8 Data)
{
/* send data to slave */
I2C_StartTransmission(i2cn, SlaveID, MWSR); //启动传输
i2c_Wait(i2cn);
i2c_write_byte(i2cn, Addr); //写地址
i2c_Wait(i2cn);
i2c_write_byte(i2cn, Data); //写数据
i2c_Wait(i2cn);
i2c_Stop(i2cn);
Pause(); //延时太短的话，可能写出错
}
/*************************************************************************
* 野火嵌入式开发工作室
*
* 函数名称：I2C_ReadAddr
* 功能说明：读取I2C设备指定地址寄存器的数据
* 参数说明：I2Cn 模块号（I2C0、I2C1）
* SlaveID 7位从机地址
* Addr 从机的寄存器地址
* 函数返回：从机寄存器的数据
* 修改时间：2012-1-20
* 备 注：
*************************************************************************/
u8 I2C_ReadAddr(I2Cn i2cn, u8 SlaveID, u8 Addr)
{
u8 result;
/* Send Slave Address */
I2C_StartTransmission (i2cn, SlaveID, MWSR);
i2c_Wait(i2cn);
/* Write Register Address */
i2c_write_byte(i2cn, Addr);
i2c_Wait(i2cn);
/* Do a repeated start */
i2c_RepeatedStart(i2cn);
/* Send Slave Address */
i2c_write_byte(i2cn, ( SlaveID << 1) | MRSW );
i2c_Wait(i2cn);
/* Put in Rx Mode */
i2c_PutinRxMode(i2cn);
/* Turn off ACK since this is second to last byte being read*/
i2c_DisableAck(i2cn); //不应答
/* Dummy read 虚假读取*/
result = I2C_D_REG(I2Cx[i2cn]);
i2c_Wait(i2cn);
/* Send stop since about to read last byte */
i2c_Stop(i2cn);
/* Read byte */
result = I2C_D_REG(I2Cx[i2cn]);
return result;
}
