STM32F4OneWire

TODO : Use DMA for sending/reveice 8 bytes?

Const

NoError* = BusOneWire.NoError;

ErrorNoDevice* = BusOneWire.ErrorNoDevice;

ErrorTimeout* = BusOneWire.ErrorTimeout;

ErrorBus* = BusOneWire.ErrorBus;

SendReset* = BusOneWire.SendReset;

NoReset* = BusOneWire.NoReset;

ReadSlot* = BusOneWire.ReadSlot;

NoRead* = BusOneWire.NoRead;

CMD_RSCRATCHPAD*    = BusOneWire.CMD_RSCRATCHPAD;

CMD_WSCRATCHPAD*    = BusOneWire.CMD_WSCRATCHPAD;

CMD_CPYSCRATCHPAD*  = BusOneWire.CMD_CPYSCRATCHPAD;

CMD_RECEEPROM*      = BusOneWire.CMD_RECEEPROM;

CMD_RPWRSUPPLY*     = BusOneWire.CMD_RPWRSUPPLY;

CMD_SEARCHROM*      = BusOneWire.CMD_SEARCHROM;

CMD_READROM*        = BusOneWire.CMD_READROM;

CMD_MATCHROM*       = BusOneWire.CMD_MATCHROM;

CMD_SKIPROM*        = BusOneWire.CMD_SKIPROM;

maxPorts* = 8;

USART1* = 0;

USART2* = 1;

USART3* = 2;

UART4* = 3;

UART5* = 4;

USART6* = 5;

UART7* = 6;

UART8* = 7;

Types

InitPar* = RECORD
        n* : INTEGER;
        TXRXPinPort*, TXRXPinN*: INTEGER;
        UCLK*: INTEGER;
        timeout*: INTEGER; (* transfere timeout in ms. 0 or lower disable timeout check *)
    END;

Bus* = RECORD (BusOneWire.Bus)
        n, UCLK, UEN: INTEGER;
        SR, DR, CR1, CR3, BRR: ADDRESS;
    END;

Procedures

Init

Initialize 1-Wire bus

PROCEDURE Init* (VAR bus : Bus; par-: InitPar);

Bus.Enable

Enable 1-wire bus

PROCEDURE (VAR bus- : Bus) Enable*;

Bus.Disable

Disable 1-wire bus

PROCEDURE (VAR bus- : Bus) Disable*;

Bus.Reset

Send reset slot and return true if devices is present on bus

PROCEDURE (VAR bus : Bus) Reset*(): BOOLEAN;

Bus.WriteBit

Write bit to 1-wire bus

PROCEDURE (VAR bus- : Bus) WriteBit*(bit : BOOLEAN);

Bus.ReadBit

Read bit from 1-wire bus

PROCEDURE (VAR bus- : Bus) ReadBit*(): BOOLEAN;

Bus.SendReceive

Send and optinal receive data on 1-wire bus * sendReset : Send reset signal at the start. SendReset or NoReset. * cmd : Address to array of bytes commands. Use ReadSlot to specify reading. * clen : Length of command array. * data : Address to optional array of read buffer. * dlen : Length of read buffer. * rStart : Index for reading to start (from 0). NoRead to disable reading.

Return TRUE if no error occured.

PROCEDURE (VAR bus : Bus) SendReceive*(sendReset : INTEGER; cmd : ADDRESS; clen : LENGTH; data : ADDRESS; dlen, rStart: LENGTH): BOOLEAN;