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OWIPolled.h
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OWIPolled.h
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// This file has been prepared for Doxygen automatic documentation generation.
/*! \file ********************************************************************
*
* Atmel Corporation
*
* \li File: OWIPolled.h
* \li Compiler: IAR EWAAVR 3.20a
* \li Support mail: avr@atmel.com
*
* \li Supported devices: All AVRs.
*
* \li Application Note: AVR318 - Dallas 1-Wire(R) master.
*
*
* \li Description: Defines used in the polled 1-Wire(R) driver.
*
* $Revision: 1.1.1.1 $
* $Date: 2010-01-07 16:39:25 $
****************************************************************************/
#ifndef _OWI_POLLED_H_
#define _OWI_POLLED_H_
#include "OWIdefs.h"
#include "OWIDeviceSpecific.h"
/*****************************************************************************
User defines
*****************************************************************************/
// Uncomment one of the two following lines to choose between
// software only and UART driver.
#define OWI_SOFTWARE_DRIVER
//#define OWI_UART_DRIVER
/*****************************************************************************
The following defines only has an effect on the software only driver.
*****************************************************************************/
/*! \brief CPU clock frequency.
*
* This define is used to calculate delays when the software only driver
* is used. The CPU frequency must be at least 2.170 MHz to be able to
* generate the shortest delays.
*/
#define CPU_FREQUENCY 8.000
/*! \brief Use internal pull-up resistor on 1-Wire buses.
*
* If this symbol is defined, the internal pull-up resister on the GPIO pins
* of the AVR will be used to generate the necessary pull-up on the bus. If
* an external pull-up resistor is used, uncomment this define.
*/
#define OWI_USE_INTERNAL_PULLUP
// Port configuration registers for 1-Wire buses.
// Make sure that all three registers belong to the same port.
#define OWI_PORT PORTC //!< 1-Wire PORT Data register.
#define OWI_PIN PINC //!< 1-Wire Input pin register.
#define OWI_DDR DDRC //!< 1-Wire Data direction register.
/*****************************************************************************
The following defines only has an effect on the UART driver.
*****************************************************************************/
/*! Use U(S)ART double speed
*
* Set this define to '1' to enable U(S)ART double speed. More information
* can be found in the data sheet of the AVR.
*
* \note The UART Baud Rate Register settings are also affected by this
* setting.
*/
#define OWI_UART_2X 1
/*! UART Baud Rate register setting that results in 115200 Baud
*
* This define should be set to the UBRR value that will generate
* a Baud rate of 115200. See data sheet for more information and
* examples of Baud rate settings.
*/
#define OWI_UBRR_115200 8
/*! UART Baud Rate register setting that results in 9600 Baud
*
* This define should be set to the UBRR value that will generate
* a Baud rate of 9600. See data sheet for more information and
* examples of Baud rate settings.
*/
#define OWI_UBRR_9600 103
/*****************************************************************************
Other defines
*****************************************************************************/
// Pin bitmasks.
#define OWI_PIN_0 0x01
#define OWI_PIN_1 0x02
#define OWI_PIN_2 0x04
#define OWI_PIN_3 0x08
#define OWI_PIN_4 0x10
#define OWI_PIN_5 0x20
#define OWI_PIN_6 0x40
#define OWI_PIN_7 0x80
/*****************************************************************************
Timing parameters
*****************************************************************************/
#define OWI_DELAY_OFFSET_CYCLES 13 //!< Timing delay when pulling bus low and releasing bus.
/*
// Bit timing delays in clock cycles (= us*clock freq in MHz).
#define OWI_DELAY_A_STD_MODE ((6 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_B_STD_MODE ((64 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_C_STD_MODE ((60 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_D_STD_MODE ((10 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_E_STD_MODE ((9 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_F_STD_MODE ((55 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
//#define OWI_DELAY_G_STD_MODE ((0 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_H_STD_MODE ((480 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_I_STD_MODE ((70 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
#define OWI_DELAY_J_STD_MODE ((410 * CPU_FREQUENCY) - OWI_DELAY_OFFSET_CYCLES)
*/
#define OWI_DELAY_A_STD_MODE (2)
#define OWI_DELAY_B_STD_MODE (80)
#define OWI_DELAY_C_STD_MODE (70)
#define OWI_DELAY_D_STD_MODE (12)
#define OWI_DELAY_E_STD_MODE (10)
#define OWI_DELAY_F_STD_MODE (50)
//#define OWI_DELAY_G_STD_MODE (0)
#define OWI_DELAY_H_STD_MODE (480)
#define OWI_DELAY_I_STD_MODE (20)
#define OWI_DELAY_J_STD_MODE (410)
/*
#define OWI_DELAY_A_STD_MODE (1) //void_delay_us(double 6) con include <util/delay.h>5D
#define OWI_DELAY_B_STD_MODE (21)
#define OWI_DELAY_C_STD_MODE (70)
#define OWI_DELAY_D_STD_MODE (12)
#define OWI_DELAY_E_STD_MODE (20)
#define OWI_DELAY_F_STD_MODE (35)
#define OWI_DELAY_I_STD_MODE (70)
*/
/*
#define OWI_DELAY_A_STD_MODE (6) //void_delay_us(double 6) con include <util/delay.h>
#define OWI_DELAY_B_STD_MODE (64)
#define OWI_DELAY_C_STD_MODE (60)
#define OWI_DELAY_D_STD_MODE (10)
#define OWI_DELAY_E_STD_MODE (9)
#define OWI_DELAY_F_STD_MODE (55)
//#define OWI_DELAY_G_STD_MODE (0)
#define OWI_DELAY_H_STD_MODE (480)
#define OWI_DELAY_I_STD_MODE (70)
#define OWI_DELAY_J_STD_MODE (410)
*/
/*!!!!WARNING: due to a change in the cpu frequency needed by baud settings, time longer then 150 us are not reachable in a single delay loop*/
#endif