diff options
author | Christian Pointner <equinox@mur.at> | 2015-02-24 23:46:38 +0100 |
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committer | Christian Pointner <equinox@mur.at> | 2015-02-24 23:46:38 +0100 |
commit | fa231e9696af24cb1b76a58ea1724129a00a4984 (patch) | |
tree | 8f65e65193daa4f1256092e4bd7356cb82fad124 /software/avr.lib/onewire.h | |
parent | hhd70: added internal functions for bulk read and write (diff) |
using external avr-utils now
Diffstat (limited to 'software/avr.lib/onewire.h')
-rw-r--r-- | software/avr.lib/onewire.h | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/software/avr.lib/onewire.h b/software/avr.lib/onewire.h deleted file mode 100644 index 1410fde..0000000 --- a/software/avr.lib/onewire.h +++ /dev/null @@ -1,206 +0,0 @@ -#ifndef OneWire_h -#define OneWire_h - -#include <inttypes.h> -#include <stdbool.h> -#include <avr/pgmspace.h> - -// You can exclude certain features from OneWire. In theory, this -// might save some space. In practice, the compiler automatically -// removes unused code (technically, the linker, using -fdata-sections -// and -ffunction-sections when compiling, and Wl,--gc-sections -// when linking), so most of these will not result in any code size -// reduction. Well, unless you try to use the missing features -// and redesign your program to not need them! ONEWIRE_CRC8_TABLE -// is the exception, because it selects a fast but large algorithm -// or a small but slow algorithm. - -// you can exclude onewire_search by defining that to 0 -#ifndef ONEWIRE_SEARCH -#define ONEWIRE_SEARCH 1 -#endif - -// You can exclude CRC checks altogether by defining this to 0 -#ifndef ONEWIRE_CRC -#define ONEWIRE_CRC 1 -#endif - -// Select the table-lookup method of computing the 8-bit CRC -// by setting this to 1. The lookup table enlarges code size by -// about 250 bytes. It does NOT consume RAM (but did in very -// old versions of OneWire). If you disable this, a slower -// but very compact algorithm is used. -#ifndef ONEWIRE_CRC8_TABLE -#define ONEWIRE_CRC8_TABLE 1 -#endif - -// You can allow 16-bit CRC checks by defining this to 1 -// (Note that ONEWIRE_CRC must also be 1.) -#ifndef ONEWIRE_CRC16 -#define ONEWIRE_CRC16 1 -#endif - -#define FALSE 0 -#define TRUE 1 - -// Platform specific I/O definitions - -#if defined(__AVR__) -#define PIN_TO_BASEREG(pin) (portInputRegister(digitalPinToPort(pin))) -#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin)) -#define IO_REG_TYPE uint8_t -#define IO_REG_ASM __asm__("r30") -#define DIRECT_READ(base, mask) (((*(base)) & (mask)) ? 1 : 0) -#define DIRECT_MODE_INPUT(base, mask) ((*((base)+1)) &= ~(mask)) -#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+1)) |= (mask)) -#define DIRECT_WRITE_LOW(base, mask) ((*((base)+2)) &= ~(mask)) -#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+2)) |= (mask)) - -#elif defined(__MK20DX128__) -#define PIN_TO_BASEREG(pin) (portOutputRegister(pin)) -#define PIN_TO_BITMASK(pin) (1) -#define IO_REG_TYPE uint8_t -#define IO_REG_ASM -#define DIRECT_READ(base, mask) (*((base)+512)) -#define DIRECT_MODE_INPUT(base, mask) (*((base)+640) = 0) -#define DIRECT_MODE_OUTPUT(base, mask) (*((base)+640) = 1) -#define DIRECT_WRITE_LOW(base, mask) (*((base)+256) = 1) -#define DIRECT_WRITE_HIGH(base, mask) (*((base)+128) = 1) - -#elif defined(__SAM3X8E__) -// Arduino 1.5.1 may have a bug in delayMicroseconds() on Arduino Due. -// http://arduino.cc/forum/index.php/topic,141030.msg1076268.html#msg1076268 -// If you have trouble with OneWire on Arduino Due, please check the -// status of delayMicroseconds() before reporting a bug in OneWire! -#define PIN_TO_BASEREG(pin) (&(digitalPinToPort(pin)->PIO_PER)) -#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin)) -#define IO_REG_TYPE uint32_t -#define IO_REG_ASM -#define DIRECT_READ(base, mask) (((*((base)+15)) & (mask)) ? 1 : 0) -#define DIRECT_MODE_INPUT(base, mask) ((*((base)+5)) = (mask)) -#define DIRECT_MODE_OUTPUT(base, mask) ((*((base)+4)) = (mask)) -#define DIRECT_WRITE_LOW(base, mask) ((*((base)+13)) = (mask)) -#define DIRECT_WRITE_HIGH(base, mask) ((*((base)+12)) = (mask)) -#ifndef PROGMEM -#define PROGMEM -#endif -#ifndef pgm_read_byte -#define pgm_read_byte(addr) (*(const uint8_t *)(addr)) -#endif - -#elif defined(__PIC32MX__) -#define PIN_TO_BASEREG(pin) (portModeRegister(digitalPinToPort(pin))) -#define PIN_TO_BITMASK(pin) (digitalPinToBitMask(pin)) -#define IO_REG_TYPE uint32_t -#define IO_REG_ASM -#define DIRECT_READ(base, mask) (((*(base+4)) & (mask)) ? 1 : 0) //PORTX + 0x10 -#define DIRECT_MODE_INPUT(base, mask) ((*(base+2)) = (mask)) //TRISXSET + 0x08 -#define DIRECT_MODE_OUTPUT(base, mask) ((*(base+1)) = (mask)) //TRISXCLR + 0x04 -#define DIRECT_WRITE_LOW(base, mask) ((*(base+8+1)) = (mask)) //LATXCLR + 0x24 -#define DIRECT_WRITE_HIGH(base, mask) ((*(base+8+2)) = (mask)) //LATXSET + 0x28 - -#else -#error "Please define I/O register types here" -#endif - -#ifndef _BV -#define _BV(bit) (1 << (bit)) -#endif - -void owi_init(uint8_t pin, volatile IO_REG_TYPE *pin_read_port); - -uint8_t owi_reset(void); -void owi_select(const uint8_t rom[8]); - -// Issue a 1-Wire rom skip command, to address all on bus. -void owi_skip(void); - -// Write a byte. If 'power' is one then the wire is held high at -// the end for parasitically powered devices. You are responsible -// for eventually depowering it by calling depower() or doing -// another read or write. -void owi_write(uint8_t v, uint8_t power); - -void owi_write_bytes(const uint8_t *buf, uint16_t count, bool power); - -// Read a byte. -uint8_t owi_read(void); - -void owi_read_bytes(uint8_t *buf, uint16_t count); - -// Write a bit. The bus is always left powered at the end, see -// note in write() about that. -void owi_write_bit(uint8_t v); - -// Read a bit. -uint8_t owi_read_bit(void); - -// Stop forcing power onto the bus. You only need to do this if -// you used the 'power' flag to write() or used a write_bit() call -// and aren't about to do another read or write. You would rather -// not leave this powered if you don't have to, just in case -// someone shorts your bus. -void owi_depower(void); - -#if ONEWIRE_SEARCH -// Clear the search state so that if will start from the beginning again. -void owi_reset_search(void); - -// Setup the search to find the device type 'family_code' on the next call -// to search(*newAddr) if it is present. -void owi_target_search(uint8_t family_code); - -// Look for the next device. Returns 1 if a new address has been -// returned. A zero might mean that the bus is shorted, there are -// no devices, or you have already retrieved all of them. It -// might be a good idea to check the CRC to make sure you didn't -// get garbage. The order is deterministic. You will always get -// the same devices in the same order. -uint8_t owi_search(uint8_t *newAddr); -#endif - -#if ONEWIRE_CRC -// Compute a Dallas Semiconductor 8 bit CRC, these are used in the -// ROM and scratchpad registers. -uint8_t owi_crc8(const uint8_t *addr, uint8_t len); - -#if ONEWIRE_CRC16 -// Compute the 1-Wire CRC16 and compare it against the received CRC. -// Example usage (reading a DS2408): -// // Put everything in a buffer so we can compute the CRC easily. -// uint8_t buf[13]; -// buf[0] = 0xF0; // Read PIO Registers -// buf[1] = 0x88; // LSB address -// buf[2] = 0x00; // MSB address -// WriteBytes(net, buf, 3); // Write 3 cmd bytes -// ReadBytes(net, buf+3, 10); // Read 6 data bytes, 2 0xFF, 2 CRC16 -// if (!CheckCRC16(buf, 11, &buf[11])) { -// // Handle error. -// } -// -// @param input - Array of bytes to checksum. -// @param len - How many bytes to use. -// @param inverted_crc - The two CRC16 bytes in the received data. -// This should just point into the received data, -// *not* at a 16-bit integer. -// @param crc - The crc starting value (optional) -// @return True, iff the CRC matches. -bool owi_check_crc16(const uint8_t* input, uint16_t len, const uint8_t* inverted_crc, uint16_t crc); - -// Compute a Dallas Semiconductor 16 bit CRC. This is required to check -// the integrity of data received from many 1-Wire devices. Note that the -// CRC computed here is *not* what you'll get from the 1-Wire network, -// for two reasons: -// 1) The CRC is transmitted bitwise inverted. -// 2) Depending on the endian-ness of your processor, the binary -// representation of the two-byte return value may have a different -// byte order than the two bytes you get from 1-Wire. -// @param input - Array of bytes to checksum. -// @param len - How many bytes to use. -// @param crc - The crc starting value (optional) -// @return The CRC16, as defined by Dallas Semiconductor. -uint16_t owi_crc16(const uint8_t* input, uint16_t len, uint16_t crc); -#endif -#endif - -#endif |