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MightyPork
2018-02-03 11:54:22 +01:00
parent 96a7b58091
commit 611b38c5e6
39 changed files with 260 additions and 487 deletions
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units/1wire/_ow_api.c
-1
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@@ -9,7 +9,6 @@
#define OW_INTERNAL
#include "_ow_internal.h"
#include "_ow_commands.h"
#include "_ow_checksum.h"
#include "_ow_low_level.h"
/* Check presence of any devices on the bus */
units/1wire/_ow_checksum.c
-36
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@@ -1,36 +0,0 @@
//
// Created by MightyPork on 2018/02/01.
//
#include "platform.h"
#define OW_INTERNAL
#include "_ow_checksum.h"
static inline uint8_t crc8_bits(uint8_t data)
{
uint8_t crc = 0;
if(data & 1) crc ^= 0x5e;
if(data & 2) crc ^= 0xbc;
if(data & 4) crc ^= 0x61;
if(data & 8) crc ^= 0xc2;
if(data & 0x10) crc ^= 0x9d;
if(data & 0x20) crc ^= 0x23;
if(data & 0x40) crc ^= 0x46;
if(data & 0x80) crc ^= 0x8c;
return crc;
}
static uint8_t crc8_add(uint8_t cksum, uint8_t byte)
{
return crc8_bits(byte ^ cksum);
}
uint8_t ow_checksum(const uint8_t *buff, uint32_t len)
{
uint8_t cksum = 0;
for(uint32_t i = 0; i < len; i++) {
cksum = crc8_add(cksum, buff[i]);
}
return cksum;
}
units/1wire/_ow_checksum.h
-27
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@@ -1,27 +0,0 @@
//
// Created by MightyPork on 2018/02/01.
//
#ifndef GEX_F072_OW_CHECKSUM_H
#define GEX_F072_OW_CHECKSUM_H
#ifndef OW_INTERNAL
#error bad include!
#endif
#include <stdint.h>
/**
* Compute a 1-wire type checksum.
* If the buffer includes the checksum, the result should be 0.
*
* (this function may be used externally, or you can delete the implementation
* from the c file if another implementation is already available)
*
* @param[in] buf - buffer of bytes to verify
* @param[in] len - buffer length
* @return checksum
*/
uint8_t ow_checksum(const uint8_t *buf, uint32_t len);
#endif //GEX_F072_OW_CHECKSUM_H
units/1wire/_ow_init.h
-25
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@@ -1,25 +0,0 @@
//
// Created by MightyPork on 2018/02/03.
//
#ifndef GEX_F072_OW_INIT_H
#define GEX_F072_OW_INIT_H
#ifndef OW_INTERNAL
#error bad include!
#endif
#include "unit_base.h"
/** Allocate data structure and set defaults */
error_t OW_preInit(Unit *unit);
/** Finalize unit set-up */
error_t OW_init(Unit *unit);
/** Tear down the unit */
void OW_deInit(Unit *unit);
extern void OW_TimerCb(TimerHandle_t xTimer);
#endif //GEX_F072_OW_INIT_H
units/1wire/_ow_internal.h
+32 -1
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@@ -27,6 +27,37 @@ struct priv {
struct ow_search_state searchState;
};
// Prototypes
/** Allocate data structure and set defaults */
error_t OW_preInit(Unit *unit);
/** Load from a binary buffer stored in Flash */
void OW_loadBinary(Unit *unit, PayloadParser *pp);
/** Write to a binary buffer for storing in Flash */
void OW_writeBinary(Unit *unit, PayloadBuilder *pb);
// ------------------------------------------------------------------------
/** Parse a key-value pair from the INI file */
error_t OW_loadIni(Unit *unit, const char *key, const char *value);
/** Generate INI file section for the unit */
void OW_writeIni(Unit *unit, IniWriter *iw);
// ------------------------------------------------------------------------
/** Allocate data structure and set defaults */
error_t OW_preInit(Unit *unit);
/** Finalize unit set-up */
error_t OW_init(Unit *unit);
/** Tear down the unit */
void OW_deInit(Unit *unit);
/** Callback for the FreeRTOS timer used to wait for device ready */
void OW_TimerCb(TimerHandle_t xTimer);
// ------------------------------------------------------------------------
#endif //GEX_F072_OW_INTERNAL_H
units/1wire/_ow_low_level.c
+30
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@@ -10,6 +10,36 @@
#include "_ow_internal.h"
#include "_ow_low_level.h"
static inline uint8_t crc8_bits(uint8_t data)
{
uint8_t crc = 0;
if(data & 1) crc ^= 0x5e;
if(data & 2) crc ^= 0xbc;
if(data & 4) crc ^= 0x61;
if(data & 8) crc ^= 0xc2;
if(data & 0x10) crc ^= 0x9d;
if(data & 0x20) crc ^= 0x23;
if(data & 0x40) crc ^= 0x46;
if(data & 0x80) crc ^= 0x8c;
return crc;
}
static uint8_t crc8_add(uint8_t cksum, uint8_t byte)
{
return crc8_bits(byte ^ cksum);
}
uint8_t ow_checksum(const uint8_t *buff, uint32_t len)
{
uint8_t cksum = 0;
for(uint32_t i = 0; i < len; i++) {
cksum = crc8_add(cksum, buff[i]);
}
return cksum;
}
// ----------------------------------------------
static inline void ow_pull_high(Unit *unit)
{
struct priv *priv = unit->data;
units/1wire/_ow_low_level.h
+13
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@@ -13,6 +13,19 @@
#include "unit_base.h"
#include "_ow_low_level.h"
/**
* Compute a 1-wire type checksum.
* If the buffer includes the checksum, the result should be 0.
*
* (this function may be used externally, or you can delete the implementation
* from the c file if another implementation is already available)
*
* @param[in] buf - buffer of bytes to verify
* @param[in] len - buffer length
* @return checksum
*/
uint8_t ow_checksum(const uint8_t *buf, uint32_t len);
/**
* Reset the 1-wire bus
*/
units/1wire/_ow_settings.h
-31
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@@ -1,31 +0,0 @@
//
// Created by MightyPork on 2018/02/03.
//
#ifndef GEX_F072_OW_SETTINGS_H
#define GEX_F072_OW_SETTINGS_H
#ifndef OW_INTERNAL
#error bad include!
#endif
#include "unit_base.h"
/** Allocate data structure and set defaults */
error_t OW_preInit(Unit *unit);
/** Load from a binary buffer stored in Flash */
void OW_loadBinary(Unit *unit, PayloadParser *pp);
/** Write to a binary buffer for storing in Flash */
void OW_writeBinary(Unit *unit, PayloadBuilder *pb);
// ------------------------------------------------------------------------
/** Parse a key-value pair from the INI file */
error_t OW_loadIni(Unit *unit, const char *key, const char *value);
/** Generate INI file section for the unit */
void OW_writeIni(Unit *unit, IniWriter *iw);
#endif //GEX_F072_OW_SETTINGS_H