Mercurial > ~darius > hgwebdir.cgi > stm32test
diff 1wire-config.h @ 13:96c345d304af default tip
Add 1wire code.
1wire.c, 1wire.h and 1wire-config.h are copied avr-lib.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Wed, 08 Feb 2012 10:37:22 +1030 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/1wire-config.h Wed Feb 08 10:37:22 2012 +1030 @@ -0,0 +1,103 @@ +/* + * Example configuration header for 1-wire bus code. + * + * This is the user servicable stuff - how to do delays and how to + * frob the IO pins. + * + * Copyright (c) 2009 + * Daniel O'Connor <darius@dons.net.au>. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * The configuration described here has the 1-wire IO on GPIOE3, + * with no pull down, nor VPP + */ + +#include "stm32f10x.h" /* GPIO* */ +#include "hw.h" /* For _usleep16() */ + +/* Fudge AVR stuff for ARM */ +#define PROGMEM +#define PSTR(x) x +#define pgm_read_byte(x) *(x) + +/* Init bus */ +#define OWBUSINIT() + +/* Set the port up to allow reading from the 1 wire bus */ +#define OWSETREAD() do { \ + GPIO_InitTypeDef GPIO_InitStructure; \ + \ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; \ + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \ + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; \ + GPIO_Init(GPIOE, &GPIO_InitStructure); \ +} while (0) + + +/* Read the 1-wire bus, non-inverting logic */ +#define OWREADBUS() (GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_3) ? 1 : 0) + +/* Set the 1-wire bus to 0 + */ +#define OWSETBUSLOW() do { \ + GPIO_InitTypeDef GPIO_InitStructure; \ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; \ + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \ + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; \ + GPIO_Init(GPIOE, &GPIO_InitStructure); \ + GPIO_ResetBits(GPIOE, GPIO_Pin_3); \ +} while (0) + +/* Set the 1-wire bus to 1 + * Change to input and let the pull up do its job + */ +#define OWSETBUSHIGH() do { \ + GPIO_InitTypeDef GPIO_InitStructure; \ + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; \ + GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; \ + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; \ + GPIO_Init(GPIOE, &GPIO_InitStructure); \ +} while (0) + +#define OWDELAY_A _usleep16(6) /* 6 usec */ +#define OWDELAY_B _usleep16(64) /* 64 usec */ +#define OWDELAY_C _usleep16(60) /* 60 usec */ +#define OWDELAY_D _usleep16(10) /* 10 usec */ +#define OWDELAY_E _usleep16(9) /* 9 usec */ +#define OWDELAY_F _usleep16(55) /* 55 usec */ +#define OWDELAY_G /* 0 usec */ +#define OWDELAY_H _usleep16(480) /* 480 usec */ +#define OWDELAY_I _usleep16(70) /* 70 usec */ +#define OWDELAY_J _usleep16(410) /* 410 usec */ + +#ifdef OW_DEBUG +#define OWPUTS(x) puts(x) +#define OWPUTSP(x) puts(x) +#define OWPRINTFP(fmt, ...) printf(fmt, ## __VA_ARGS__) +#else +#define OWPUTS(x) +#define OWPUTSP(x) +#define OWPRINTFP(fmt, ...) +#endif