Posted on July 06, 2018 at 13:26Hello,
I am working on STM32F4 discovery board, trying to interface DS2482-100 (I2C driver ic) and DS18b20 (Temperture sensor one wire).
my interface is like
stm32f4 ---i2c--->
DS2482-100 ----one wire----->DS18b20
I am able to access the registers for DS2482-100, but the difficulty i am facing is to access DS18b20
register through the I2C drive IC.
I need to access DS18b20
register
the Read ROM register & Read scratchpad register which contains the temperature values.
Some of you may find it unnecessary but i am doing this for curiosity and R&D.
Any help will be appreciated.
Thank you.
This is how i am writing a byte to
DS2482-100
void write_byte(uint8_t byte)
{
buffer[0]=0xA5; buffer[1]=byte;
HAL_I2C_Master_Transmit(&hi2c1, 0x18<<1, buffer, 2, 100);
HAL_Delay(20);
}
This is how i am reading a byte to
DS2482-100
void read_byte()
{
buffer[0]=0x96;
HAL_I2C_Master_Transmit(&hi2c1, 0x18<<1, buffer, 1, 100);
buffer[0]=0xE1; buffer[1]=0xE1;
HAL_I2C_Master_Transmit(&hi2c1, 0x18<<1, buffer, 2, 100);
HAL_I2C_Master_Receive(&hi2c1, 0x18<<1, data, 8, 100);
HAL_Delay(20);
}
#ds2482 #stm32 #stm32f4 #stm32f4-discovery #temperature-sensor #ds18b20 #12c
