Library Functions. More...

Functions
void	TM_OneWire_Init (TM_OneWire_t OneWireStruct, GPIO_TypeDef GPIOx, uint16_t GPIO_Pin)
	Initializes OneWire bus. More...

uint8_t	TM_OneWire_Reset (TM_OneWire_t *OneWireStruct)
	Resets OneWire bus. More...

uint8_t	TM_OneWire_ReadByte (TM_OneWire_t *OneWireStruct)
	Reads byte from one wire bus. More...

void	TM_OneWire_WriteByte (TM_OneWire_t *OneWireStruct, uint8_t byte)
	Writes byte to bus. More...

void	TM_OneWire_WriteBit (TM_OneWire_t *OneWireStruct, uint8_t bit)
	Writes single bit to onewire bus. More...

uint8_t	TM_OneWire_ReadBit (TM_OneWire_t *OneWireStruct)
	Reads single bit from one wire bus. More...

uint8_t	TM_OneWire_Search (TM_OneWire_t *OneWireStruct, uint8_t command)
	Searches for OneWire devices on specific Onewire port. More...

void	TM_OneWire_ResetSearch (TM_OneWire_t *OneWireStruct)
	Resets search states. More...

uint8_t	TM_OneWire_First (TM_OneWire_t *OneWireStruct)
	Starts search, reset states first. More...

uint8_t	TM_OneWire_Next (TM_OneWire_t *OneWireStruct)
	Reads next device. More...

uint8_t	TM_OneWire_GetROM (TM_OneWire_t *OneWireStruct, uint8_t index)
	Gets ROM number from device from search. More...

void	TM_OneWire_GetFullROM (TM_OneWire_t OneWireStruct, uint8_t firstIndex)
	Gets all 8 bytes ROM value from device from search. More...

void	TM_OneWire_Select (TM_OneWire_t OneWireStruct, uint8_t addr)
	Selects specific slave on bus. More...

void	TM_OneWire_SelectWithPointer (TM_OneWire_t OneWireStruct, uint8_t ROM)
	Selects specific slave on bus with pointer address. More...

uint8_t	TM_OneWire_CRC8 (uint8_t *addr, uint8_t len)
	Calculates 8-bit CRC for 1-wire devices. More...

Detailed Description

Library Functions.

Function Documentation

uint8_t TM_OneWire_CRC8	(	uint8_t *	addr,
		uint8_t	len
	)

Calculates 8-bit CRC for 1-wire devices.

Parameters

*addr	Pointer to 8-bit array of data to calculate CRC
len	Number of bytes to check

Return values

Calculated CRC from input data

uint8_t TM_OneWire_First ( TM_OneWire_t * OneWireStruct )

Starts search, reset states first.

Note: When you want to search for ALL devices on one onewire port, you should first use this function.
1 //...Initialization before

2 status = TM_OneWire_First(&OneWireStruct);

3 while (status) {

4 //Save ROM number from device

5 TM_OneWire_GetFullROM(ROM_Array_Pointer);

6 //Check for new device

7 status = TM_OneWire_Next(&OneWireStruct);

8 }

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire where to reset search values
Device	status: 0: No devices detected > 0: Device detected

void TM_OneWire_GetFullROM	(	TM_OneWire_t *	OneWireStruct,
		uint8_t *	firstIndex
	)

Gets all 8 bytes ROM value from device from search.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire
*firstIndex	Pointer to first location for first byte, other bytes are automatically incremented

Return values

None

uint8_t TM_OneWire_GetROM	(	TM_OneWire_t *	OneWireStruct,
		uint8_t	index
	)

Gets ROM number from device from search.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire
index	Because each device has 8-bytes long ROm address, you have to call this 8 times, to get ROM bytes from 0 to 7 ROM byte for index (0 to 7) at current found device

void TM_OneWire_Init	(	TM_OneWire_t *	OneWireStruct,
		GPIO_TypeDef *	GPIOx,
		uint16_t	GPIO_Pin
	)

Initializes OneWire bus.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t empty working onewire structure
*Pointer	to GPIO port used for onewire channel
GPIO_Pin	GPIO Pin on specific GPIOx to be used for onewire channel

Return values

None

uint8_t TM_OneWire_Next ( TM_OneWire_t * OneWireStruct )

Reads next device.

Note: Use TM_OneWire_First to start searching

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire
Device	status: 0: No devices detected any more > 0: New device detected

uint8_t TM_OneWire_ReadBit ( TM_OneWire_t * OneWireStruct )

Reads single bit from one wire bus.

Parameters

*OneWireStruct Pointer to TM_OneWire_t working onewire structure

Return values

Bit	value: 0: Bit is low (zero) > 0: Bit is high (one)

uint8_t TM_OneWire_ReadByte ( TM_OneWire_t * OneWireStruct )

Reads byte from one wire bus.

Parameters

*OneWireStruct Pointer to TM_OneWire_t working onewire structure

Return values

Byte	from read operation

uint8_t TM_OneWire_Reset ( TM_OneWire_t * OneWireStruct )

Resets OneWire bus.

Note: Sends reset command for OneWire

Parameters

*OneWireStruct Pointer to TM_OneWire_t working onewire structure

Return values

None

void TM_OneWire_ResetSearch ( TM_OneWire_t * OneWireStruct )

Resets search states.

Parameters

*OneWireStruct Pointer to TM_OneWire_t working onewire where to reset search values

Return values

None

uint8_t TM_OneWire_Search	(	TM_OneWire_t *	OneWireStruct,
		uint8_t	command
	)

Searches for OneWire devices on specific Onewire port.

Note: Not meant for public use. Use TM_OneWire_First and TM_OneWire_Next for this.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire structure where to search
Device	status: 0: No devices detected > 0: Device detected

void TM_OneWire_Select	(	TM_OneWire_t *	OneWireStruct,
		uint8_t *	addr
	)

Selects specific slave on bus.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire
*addr	Pointer to first location of 8-bytes long ROM address

Return values

None

void TM_OneWire_SelectWithPointer	(	TM_OneWire_t *	OneWireStruct,
		uint8_t *	ROM
	)

Selects specific slave on bus with pointer address.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire
*ROM	Pointer to first byte of ROM address

Return values

None

void TM_OneWire_WriteBit	(	TM_OneWire_t *	OneWireStruct,
		uint8_t	bit
	)

Writes single bit to onewire bus.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire structure
bit	Bit value to send, 1 or 0

Return values

None

void TM_OneWire_WriteByte	(	TM_OneWire_t *	OneWireStruct,
		uint8_t	byte
	)

Writes byte to bus.

Parameters

*OneWireStruct	Pointer to TM_OneWire_t working onewire structure
byte	8-bit value to write over OneWire protocol

Return values

None