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com: A 1-wire interface rework

doc
Christos Houtouridis 6 years ago
parent
ab729c5c81
commit
de4eb2cf09
3 changed files with 286 additions and 354 deletions
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  1. +238
    -227
      include/utl/com/_1wire.h
  2. +47
    -126
      include/utl/com/_1wire_uart.h
  3. +1
    -1
      include/utl/container/id.h

+ 238
- 227
include/utl/com/_1wire.h View File

@@ -26,19 +26,28 @@
#include <utl/meta/sfinae.h>
#include <utl/com/_1wire_id.h>
#include <gsl/span>
using gsl::span;
namespace utl {
/*!
* \ingroup Communication
* \brief Abstract base class interface for 1-wire bus
*/
//!@{
/*!
* \name Friend API to provide common functionality to all specializations
*/
namespace _1wire_i_det {
template <typename _T> byte_t _touch (_T& obj, byte_t out, typename _T::Speed s);
template <typename _T> void _match (_T& obj, _1wire_id_t& id, typename _T::Speed s);
template <typename _T> void _match_n_ovdr (_T& obj, _1wire_id_t& id);
template <typename _T> void _skip (_T& obj, typename _T::Speed s);
template <typename _T> void _skip_n_ovdr (_T& obj);
template <typename _T> _1wire_id_t _first (_T& obj, typename _T::Speed s, bool alarm);
template <typename _T> _1wire_id_t _next (_T& obj, typename _T::Speed s, bool alarm);
}
/*!
* \brief
* Template base class for 1-wire communication interface using CRTP
@@ -73,11 +82,11 @@ namespace utl {
*/
//!@{
private:
Speed speed () { return impl().speed(); } //!< Get the 1-wire bus speed
Speed speed () const { return impl().speed(); } //!< Get the 1-wire bus speed
void speed (Speed s) { return impl().speed(s); } //!< Set the 1-wire bus speed
bool bit () { return impl().bit(); } //!< Read a bit from the 1-Wire bus, return it and provide the recovery time.
bool bit (bool b) { return impl().bit(b); } //!< Write a bit to the 1-Wire bus, return write status and provide the recovery time.
bool _reset () { return impl()._reset(); } //!< Generate a 1-wire reset and return the operation status
//! Write a bit to the 1-Wire bus, return response/write status and provide the recovery time.
bool bit (bool b) { return impl().bit(b); }
bool _reset (Speed s){ return impl()._reset(s); } //!< Generate a 1-wire reset and return the operation status
//!@}
/*!
@@ -94,18 +103,13 @@ namespace utl {
CMD_ALARM_SEARCH = 0xEC,
CMD_SEARCH_ROM = 0xF0
};
template <typename _T> friend bool _1wire_i_reset (_T&, typename _T::Speed);
template <typename _T> friend byte_t _1wire_i_rw (_T&, byte_t, typename _T::Speed);
template <typename _T> friend byte_t _1wire_i_rx (_T&, typename _T::Speed);
template <typename _T> friend size_t _1wire_i_rx (_T&, span<byte_t>, typename _T::Speed);
template <typename _T> friend size_t _1wire_i_tx (_T&, byte_t, typename _T::Speed);
template <typename _T> friend size_t _1wire_i_tx (_T&, const span<byte_t>, typename _T::Speed);
template <typename _T> friend void _1wire_i_match (_T& obj, _1wire_id_t& id, typename _T::Speed s);
template <typename _T> friend void _1wire_i_match_n_ovdr (_T& obj, _1wire_id_t& id);
template <typename _T> friend void _1wire_i_skip (_T& obj, typename _T::Speed s);
template <typename _T> friend void _1wire_i_skip_n_ovdr (_T& obj);
template <typename _T> friend _1wire_id_t _1wire_i_first (_T&, typename _T::Speed, bool);
template <typename _T> friend _1wire_id_t _1wire_i_next (_T&, typename _T::Speed, bool);
template <typename _T> friend byte_t _1wire_i_det::_touch (_T&, byte_t, typename _T::Speed);
template <typename _T> friend void _1wire_i_det::_match (_T& obj, _1wire_id_t& id, typename _T::Speed s);
template <typename _T> friend void _1wire_i_det::_match_n_ovdr (_T& obj, _1wire_id_t& id);
template <typename _T> friend void _1wire_i_det::_skip (_T& obj, typename _T::Speed s);
template <typename _T> friend void _1wire_i_det::_skip_n_ovdr (_T& obj);
template <typename _T> friend _1wire_id_t _1wire_i_det::_first (_T&, typename _T::Speed, bool);
template <typename _T> friend _1wire_id_t _1wire_i_det::_next (_T&, typename _T::Speed, bool);
//!@}
/*!
@@ -121,39 +125,75 @@ namespace utl {
* \arg 0 Fail
* \arg 1 Success
*/
bool reset (Speed s) { return _1wire_i_reset (*this, s); };
//! Read a byte from 1-Wire bus
//! @param s The bus speed
//! @return The received byte
byte_t read (Speed s) { return _1wire_i_rx (*this, s); }
//! Read a span of bytes from 1-wire bus
//! \param data Ref to data span
//! \param s The speed to use
//! \return The number of received bytes
size_t read (span<byte_t> data, Speed s) { return _1wire_i_rx (*this, data, s); }
//! \brief Write a byte to 1-Wire bus
//! \param b The byte to write
//! \param s Bus speed to use
//! \return The number of transmitted bytes
size_t write (byte_t byte, Speed s) { return _1wire_i_tx (*this, byte, s); }
//! \brief Write a span of bytes to 1-wire bus
//! \param data Ref to data span
//! \param s Bus speed to use
//! \return The number of transmitted bytes
size_t write (const span<byte_t> data, Speed s) { return _1wire_i_tx (*this, data, s); }
bool reset (Speed s = Speed::STD) {
return _reset (s);
}
/*!
* Transmit a byte to 1-Wire bus and read the response
* \param out The byte to write
* \param s Bus speed to use
* \return The byte received.
*/
byte_t tx_data (byte_t out, Speed s = Speed::STD) {
return _1wire_i_det::_touch (*this, out, s);
}
/*!
* \brief
* Write a byte to 1-Wire bus and read the response
* \param b The byte to write
* Transmit a number of bytes to 1-wire bus and read the response
* \param out Pointer to data to transmit
* \param in Pointer to data to store
* \param n Number of bytes
* \param s Speed to use
* \return The number of transmitted bytes
*/
size_t tx_data (const byte_t *out, byte_t *in, size_t n, Speed s = Speed::STD);
/*!
* Receive a byte from 1-Wire bus while transmitting 0xFF
* \param s Bus speed to use
* \return The byte received.
*/
byte_t rw (byte_t b, Speed s) { return _1wire_i_rw (*this, b, s); }
byte_t rx_data (Speed s = Speed::STD) {
return _1wire_i_det::_touch (*this, 0xFF, s);
}
/*!
* Receive a number of bytes from 1-wire bus while transmitting 0xFFs
* \param in Pointer to data to store
* \param n Number of bytes
* \param s Speed to use
* \return The number of transmitted bytes
*/
size_t rx_data (byte_t *in, size_t n, Speed s = Speed::STD);
void match (_1wire_id_t& id, Speed s) { _1wire_i_match (*this, id, s); }
void match_n_ovdr (_1wire_id_t& id) { _1wire_i_match_n_ovdr (*this, id); }
void skip (Speed s) { _1wire_i_skip (*this, s); }
void skip_n_ovdr () { _1wire_i_skip_n_ovdr (*this); }
/*!
* Send match rom command
* \param id The ID to select on the bus
* \param s The speed to use for the command
*/
void match (_1wire_id_t& id, Speed s = Speed::STD) {
_1wire_i_det::_match (*this, id, s);
}
/*!
* Match and overdrive sequence
* \param obj The object from which we call private members
* \param id The ID to select on the bus
*/
void match_n_ovdr (_1wire_id_t& id) {
_1wire_i_det::_match_n_ovdr (*this, id);
}
/*!
* Send skip command to the bus
* \param id The ID to select on the bus
*/
void skip (Speed s = Speed::STD) {
_1wire_i_det::_skip (*this, s);
}
/*!
* Send the Skip and Overdrive sequence
*/
void skip_n_ovdr () {
_1wire_i_det::_skip_n_ovdr (*this);
}
/*!
* \brief
@@ -164,7 +204,9 @@ namespace utl {
* \return ID The romID
* \arg nullDev Indicate no [more] device[s]
*/
_1wire_id_t first (Speed s, bool alarm =false) { return _1wire_i_first (*this, s, alarm); }
_1wire_id_t first (Speed s = Speed::STD, bool alarm =false) {
return _1wire_i_det::_first (*this, s, alarm);
}
/*!
* \brief
* 'next' operation, to search on the 1-Wire for the next device.
@@ -175,10 +217,11 @@ namespace utl {
* \return ID The romID
* \arg nullDev Indicate no [more] device[s]
*/
_1wire_id_t next (Speed s, bool alarm =false) { return _1wire_i_next (*this, s, alarm); }
_1wire_id_t next (Speed s = Speed::STD, bool alarm =false) {
return _1wire_i_det::_next (*this, s, alarm);
}
//!@}
private:
_1wire_id_t dec_ {_1wire_id_t::nullDev()}; /*!<
* Hold the algorithm's select bit when a discrepancy
@@ -194,7 +237,19 @@ namespace utl {
_1wire_id_t cur_ {_1wire_id_t::nullDev()}; //! Current rom discrepancy state
};
template <typename _I>
size_t _1wire_i<_I>::tx_data (const byte_t *out, byte_t *in, size_t n, Speed s){
for (size_t nn {n} ; nn ; --nn)
*in++ = tx_data (*out++, s);
return n;
}
template <typename _I>
size_t _1wire_i<_I>::rx_data(byte_t *in, size_t n, Speed s) {
for (size_t nn {n} ; nn ; --nn)
*in++ = tx_data (0xFF, s);
return n;
}
/*!
* \brief
@@ -226,11 +281,11 @@ namespace utl {
*/
//!@{
private:
virtual Speed speed () =0; //!< Get the 1-wire bus speed
virtual Speed speed () const =0; //!< Get the 1-wire bus speed
virtual void speed (Speed) =0; //!< Set the 1-wire bus speed
virtual bool bit () =0; //!< Read a bit from the 1-Wire bus, return it and provide the recovery time.
virtual bool bit (bool) =0; //!< Write a bit to the 1-Wire bus, return write status and provide the recovery time.
virtual bool _reset () =0; //!< Generate a 1-wire reset and return the operation status
virtual bool _reset (Speed) =0; //!< Generate a 1-wire reset and return the operation status
//!@}
/*!
@@ -247,18 +302,13 @@ namespace utl {
CMD_ALARM_SEARCH = 0xEC,
CMD_SEARCH_ROM = 0xF0
};
template <typename _T> friend bool _1wire_i_reset (_T&, typename _T::Speed);
template <typename _T> friend byte_t _1wire_i_rw (_T&, byte_t, typename _T::Speed);
template <typename _T> friend byte_t _1wire_i_rx (_T&, typename _T::Speed);
template <typename _T> friend size_t _1wire_i_rx (_T&, span<byte_t>, typename _T::Speed);
template <typename _T> friend size_t _1wire_i_tx (_T&, byte_t, typename _T::Speed);
template <typename _T> friend size_t _1wire_i_tx (_T&, const span<byte_t>, typename _T::Speed);
template <typename _T> friend void _1wire_i_match (_T& obj, _1wire_id_t& id, typename _T::Speed s);
template <typename _T> friend void _1wire_i_match_n_ovdr (_T& obj, _1wire_id_t& id);
template <typename _T> friend void _1wire_i_skip (_T& obj, typename _T::Speed s);
template <typename _T> friend void _1wire_i_skip_n_ovdr (_T& obj);
template <typename _T> friend _1wire_id_t _1wire_i_first (_T&, typename _T::Speed, bool);
template <typename _T> friend _1wire_id_t _1wire_i_next (_T&, typename _T::Speed, bool);
template <typename _T> friend byte_t _1wire_i_det::_touch (_T&, byte_t, typename _T::Speed);
template <typename _T> friend void _1wire_i_det::_match (_T& obj, _1wire_id_t& id, typename _T::Speed s);
template <typename _T> friend void _1wire_i_det::_match_n_ovdr (_T& obj, _1wire_id_t& id);
template <typename _T> friend void _1wire_i_det::_skip (_T& obj, typename _T::Speed s);
template <typename _T> friend void _1wire_i_det::_skip_n_ovdr (_T& obj);
template <typename _T> friend _1wire_id_t _1wire_i_det::_first (_T&, typename _T::Speed, bool);
template <typename _T> friend _1wire_id_t _1wire_i_det::_next (_T&, typename _T::Speed, bool);
//!@}
/*!
@@ -274,39 +324,75 @@ namespace utl {
* \arg 0 Fail
* \arg 1 Success
*/
bool reset (Speed s) { return _1wire_i_reset (*this, s); };
//! Read a byte from 1-Wire bus
//! @param s The bus speed
//! @return The received byte
byte_t read (Speed s) { return _1wire_i_rx (*this, s); }
//! Read a span of bytes from 1-wire bus
//! \param data Ref to data span
//! \param s The speed to use
//! \return The number of received bytes
size_t read (span<byte_t> data, Speed s) { return _1wire_i_rx (*this, data, s); }
//! \brief Write a byte to 1-Wire bus
//! \param b The byte to write
//! \param s Bus speed to use
//! \return The number of transmitted bytes
size_t write (byte_t byte, Speed s) { return _1wire_i_tx (*this, byte, s); }
//! \brief Write a span of bytes to 1-wire bus
//! \param data Ref to data span
//! \param s Bus speed to use
//! \return The number of transmitted bytes
size_t write (const span<byte_t> data, Speed s) { return _1wire_i_tx (*this, data, s); }
bool reset (Speed s = Speed::STD) {
return _reset (s);
}
/*!
* Transmit a byte to 1-Wire bus and read the response
* \param out The byte to write
* \param s Bus speed to use
* \return The byte received.
*/
byte_t tx_data (byte_t out, Speed s = Speed::STD) {
return _1wire_i_det::_touch (*this, out, s);
}
/*!
* \brief
* Write a byte to 1-Wire bus and read the response
* \param b The byte to write
* Transmit a number of bytes to 1-wire bus and read the response
* \param out Pointer to data to transmit
* \param in Pointer to data to store
* \param n Number of bytes
* \param s Speed to use
* \return The number of transmitted bytes
*/
size_t tx_data (const byte_t *out, byte_t *in, size_t n, Speed s = Speed::STD);
/*!
* Receive a byte from 1-Wire bus while transmitting 0xFF
* \param s Bus speed to use
* \return The byte received.
*/
byte_t rw (byte_t b, Speed s) { return _1wire_i_rw (*this, b, s); }
byte_t rx_data (Speed s = Speed::STD) {
return _1wire_i_det::_touch (*this, 0xFF, s);
}
/*!
* Receive a number of bytes from 1-wire bus while transmitting 0xFFs
* \param in Pointer to data to store
* \param n Number of bytes
* \param s Speed to use
* \return The number of transmitted bytes
*/
size_t rx_data (byte_t *in, size_t n, Speed s = Speed::STD);
void match (_1wire_id_t& id, Speed s) { _1wire_i_match (*this, id, s); }
void match_n_ovdr (_1wire_id_t& id) { _1wire_i_match_n_ovdr (*this, id); }
void skip (Speed s) { _1wire_i_skip (*this, s); }
void skip_n_ovdr () { _1wire_i_skip_n_ovdr (*this); }
/*!
* Send match rom command
* \param id The ID to select on the bus
* \param s The speed to use for the command
*/
void match (_1wire_id_t& id, Speed s = Speed::STD) {
_1wire_i_det::_match (*this, id, s);
}
/*!
* Match and overdrive sequence
* \param obj The object from which we call private members
* \param id The ID to select on the bus
*/
void match_n_ovdr (_1wire_id_t& id) {
_1wire_i_det::_match_n_ovdr (*this, id);
}
/*!
* Send skip command to the bus
* \param id The ID to select on the bus
*/
void skip (Speed s = Speed::STD) {
_1wire_i_det::_skip (*this, s);
}
/*!
* Send the Skip and Overdrive sequence
*/
void skip_n_ovdr () {
_1wire_i_det::_skip_n_ovdr (*this);
}
/*!
* \brief
@@ -317,7 +403,9 @@ namespace utl {
* \return ID The romID
* \arg nullDev Indicate no [more] device[s]
*/
_1wire_id_t first (Speed s, bool alarm =false) { return _1wire_i_first (*this, s, alarm); }
_1wire_id_t first (Speed s = Speed::STD, bool alarm =false) {
return _1wire_i_det::_first (*this, s, alarm);
}
/*!
* \brief
* 'next' operation, to search on the 1-Wire for the next device.
@@ -328,10 +416,11 @@ namespace utl {
* \return ID The romID
* \arg nullDev Indicate no [more] device[s]
*/
_1wire_id_t next (Speed s, bool alarm =false) { return _1wire_i_next (*this, s, alarm); }
_1wire_id_t next (Speed s = Speed::STD, bool alarm =false) {
return _1wire_i_det::_next (*this, s, alarm);
}
//!@}
private:
_1wire_id_t dec_ {_1wire_id_t::nullDev()}; /*!<
* Hold the algorithm's select bit when a discrepancy
@@ -348,27 +437,24 @@ namespace utl {
};
/*!
* \name Friend API to provide common functionality to all specializations
*/
//!@{
size_t _1wire_i<virtual_tag>::tx_data (const byte_t *out, byte_t *in, size_t n, Speed s){
for (size_t nn {n} ; nn ; --nn)
*in++ = tx_data (*out++, s);
return n;
}
/*!
* \brief
* Generate a 1-wire reset
* \param obj The object from which we call private members
* \param s Bus speed
* \return The status of the operation
* \arg 0 Fail
* \arg 1 Success
*/
template <typename _T>
bool _1wire_i_reset (_T& obj, typename _T::Speed s) {
if (obj.speed () != s)
obj.speed (s);
return obj._reset ();
size_t _1wire_i<virtual_tag>::rx_data(byte_t *in, size_t n, Speed s) {
for (size_t nn {n} ; nn ; --nn)
*in++ = tx_data (0xFF, s);
return n;
}
/*!
* \name Friend API to provide common functionality to all specializations
*/
//!@{
namespace _1wire_i_det {
/*!
* \brief
* Write a byte to 1-Wire bus and read the response
@@ -378,7 +464,7 @@ namespace utl {
* \return The byte received.
*/
template <typename _T>
byte_t _1wire_i_rw (_T& obj, byte_t b, typename _T::Speed s) {
byte_t _touch (_T& obj, byte_t out, typename _T::Speed s) {
byte_t ret {0};
// Select speed once
@@ -386,90 +472,16 @@ namespace utl {
obj.speed (s);
for (uint8_t i =8; i>0 ; --i) {
ret >>= 1;
if ((b & 0x01) != 0) ret |= (obj.bit ()) ? 0x80 : 0x00;
else obj.bit (0);
b >>= 1;
ret |= (obj.bit (out & 0x01)) ? 0x80 : 0x00;
out >>= 1;
/*^
* If the bit is 1 we use the read sequence, as it has the same
* waveform with write-1 and we get the slave response
* If the bit is 0, we can not read the slave response so we just write-0
* We shift bits to right as LSB comes first and mask it to MSB
* If we need to read we have to write 1
*/
}
return ret;
}
/*!
* \brief Read a byte from 1-Wire bus
* \param obj The object from which we call private members
* \param s Bus speed to use
* \return The byte received.
*/
template <typename _T>
byte_t _1wire_i_rx (_T& obj, typename _T::Speed s) {
byte_t byte {0};
// Select speed once
if (obj.speed () != s)
obj.speed (s);
for (uint8_t i =8; i>0 ; --i) {
// shift bits to right as LSB comes first and mask it to MSB
byte >>= 1;
byte |= (obj.bit ()) ? 0x80 : 0x00;
}
return byte;
}
/*!
* \brief Read a span of bytes from 1-Wire bus
* \param obj The object from which we call private members
* \param data Reference to byte span
* \param s Bus speed to use
* \return The number of received bytes. Actual return data.size()
*/
template <typename _T>
size_t _1wire_i_rx (_T& obj, span<byte_t> data, typename _T::Speed s) {
// Select speed once
if (obj.speed () != s)
obj.speed (s);
for (byte_t& byte : data) {
byte = 0;
for (uint8_t i =8; i>0 ; --i) {
// shift bits to right as LSB comes first and mask it to MSB
byte >>= 1;
byte |= (obj.bit ()) ? 0x80 : 0x00;
}
}
return data.size();
}
/*!
* \brief Write a byte to 1-Wire bus
* \param obj The object from which we call private members
* \param byte The byte to write
* \param s Bus speed to use
* \return The number of transmitted bytes. So "1" of "0"
*/
template <typename _T>
size_t _1wire_i_tx (_T& obj, byte_t byte, typename _T::Speed s) {
return (_1wire_i_rw (obj, byte, s) == byte) ? 1 : 0;
}
/*!
* \brief Write a byte to 1-Wire bus
* \param obj The object from which we call private members
* \param data Reference to byte span
* \param s Bus speed to use
* \return The number of transmitted bytes.
* \note
* The procedure breaks on first transmission error
*/
template <typename _T>
size_t _1wire_i_tx (_T& obj, const span<byte_t> data, typename _T::Speed s) {
size_t ret {0};
for (byte_t byte : data) {
if (_1wire_i_rw (obj, byte, s) == byte)
++ret;
else
break;
}
return ret;
}
/*!
* Send match rom command
@@ -478,10 +490,10 @@ namespace utl {
* \param s The speed to use for the command
*/
template <typename _T>
void _1wire_i_match (_T& obj, _1wire_id_t& id, typename _T::Speed s) {
_1wire_i_tx (obj, (s == _T::Speed::STD) ? _T::CMD_MATCH : _T::CMD_OVDR_MATCH, s);
void _match (_T& obj, _1wire_id_t& id, typename _T::Speed s) {
_touch (obj, (s == _T::Speed::STD) ? _T::CMD_MATCH : _T::CMD_OVDR_MATCH, s);
for (uint8_t& b : id)
_1wire_i_tx (obj, b, s);
_touch (obj, b, s);
}
/*!
@@ -490,10 +502,10 @@ namespace utl {
* \param id The ID to select on the bus
*/
template <typename _T>
void _1wire_i_match_n_ovdr (_T& obj, _1wire_id_t& id) {
_1wire_i_tx (obj, _T::CMD_MATCH, _T::Speed::STD);
void _match_n_ovdr (_T& obj, _1wire_id_t& id) {
_touch (obj, _T::CMD_MATCH, _T::Speed::STD);
for (uint8_t& b : id)
_1wire_i_tx (obj, b, _T::Speed::OVDR);
_touch (obj, b, _T::Speed::OVDR);
}
/*!
@@ -502,8 +514,8 @@ namespace utl {
* \param id The ID to select on the bus
*/
template <typename _T>
void _1wire_i_skip (_T& obj, typename _T::Speed s) {
_1wire_i_tx (obj, (s == _T::Speed::STD) ? _T::CMD_SKIP : _T::CMD_SKIP, s);
void _skip (_T& obj, typename _T::Speed s) {
_touch (obj, (s == _T::Speed::STD) ? _T::CMD_SKIP : _T::CMD_SKIP, s);
}
/*!
@@ -511,8 +523,8 @@ namespace utl {
* \param obj The object from which we call private members
*/
template <typename _T>
void _1wire_i_skip_n_ovdr (_T& obj) {
_1wire_i_tx (obj, _T::CMD_OVDR_SKIP, _T::Speed::STD);
void _skip_n_ovdr (_T& obj) {
_touch (obj, _T::CMD_OVDR_SKIP, _T::Speed::STD);
}
/*!
@@ -525,9 +537,9 @@ namespace utl {
* \arg nullDev Indicate no [more] device[s]
*/
template <typename _T>
_1wire_id_t _1wire_i_first (_T& obj, typename _T::Speed s, bool alarm) {
_1wire_id_t _first (_T& obj, typename _T::Speed s, bool alarm) {
obj.dec_ = obj.pos_ = obj.cur_ = _1wire_id_t::nullDev();
return _1wire_i_next (obj, s, alarm);
return _next (obj, s, alarm);
}
/*!
@@ -541,7 +553,7 @@ namespace utl {
* \arg nullDev Indicate no [more] device[s]
*/
template <typename _T>
_1wire_id_t _1wire_i_next (_T& obj, typename _T::Speed s, bool alarm) {
_1wire_id_t _next (_T& obj, typename _T::Speed s, bool alarm) {
uint8_t b, bxx; // bit helper vars
uint8_t i;
_1wire_id_t ID;
@@ -558,15 +570,19 @@ namespace utl {
break;
}
// Issue search command
if (alarm) obj.write (_T::CMD_ALARM_SEARCH, s);
else obj.write (_T::CMD_SEARCH_ROM, s);
if (alarm) obj.tx_data (_T::CMD_ALARM_SEARCH, s);
else obj.tx_data (_T::CMD_SEARCH_ROM, s);
// Select speed once
if (obj.speed () != s)
obj.speed (s);
// traverse entire RomID from LSB to MSB
for (i =0 ; i<64 ; ++i) {
// Get response pair bits
bxx = obj.bit (); // bit
bxx = obj.bit (1); // bit
bxx <<= 1;
bxx |= obj.bit (); // complementary bit
bxx |= obj.bit (1); // complementary bit
if (bxx == 0x00) {
// 00 - We have discrepancy
@@ -621,7 +637,8 @@ namespace utl {
return ID;
}
//!@}
} // namespace _1wire_i_det
//!@}
#if defined _utl_have_concepts
@@ -638,9 +655,8 @@ namespace utl {
// typename T::Command;
// Methods
{t.reset(s)} -> bool;
{t.read(s)} -> byte_t;
{t.write(0, s)} -> size_t;
{t.rw(0, s)} -> byte_t;
{t.tx_data(1)} -> byte_t;
{t.rx_data(s)} -> byte_t;
t.match(id, s);
t.match_n_ovdr(id);
t.skip(s);
@@ -649,16 +665,12 @@ namespace utl {
{t.next(s)} -> _1wire_id_t;
};
#else
namespace _1wire_i_cnpt {
namespace _1wire_i_det {
using std::declval;
template <class _Tp> using try_reset_t = decltype (declval<_Tp>().reset (declval<typename _Tp::Speed>()));
template <class _Tp> using try_rw_t = decltype (declval<_Tp>().rw (declval<byte_t>(), declval<typename _Tp::Speed>()));
template <class _Tp> using try_rx1_t = decltype (declval<_Tp>().read (declval<typename _Tp::Speed>()));
template <class _Tp> using try_rx2_t = decltype (declval<_Tp>().read (declval<span<byte_t>>(), declval<typename _Tp::Speed>()));
template <class _Tp> using try_tx1_t = decltype (declval<_Tp>().write (declval<byte_t>(), declval<typename _Tp::Speed>()));
template <class _Tp> using try_tx2_t = decltype (declval<_Tp>().write (declval<const span<byte_t>>(), declval<typename _Tp::Speed>()));
template <class _Tp> using try_rx1_t = decltype (declval<_Tp>().rx_data (declval<typename _Tp::Speed>()));
template <class _Tp> using try_tx1_t = decltype (declval<_Tp>().tx_data (declval<byte_t>(), declval<typename _Tp::Speed>()));
template <class _Tp> using try_match_t = decltype (declval<_Tp>().match (declval<_1wire_id_t&>(), declval<typename _Tp::Speed>()));
template <class _Tp> using try_match_n_ovdr_t = decltype (declval<_Tp>().match_n_ovdr (declval<_1wire_id_t&>()));
@@ -678,11 +690,10 @@ namespace utl {
// typename _Tp::Speed,
// typename _Tp::Command,
use_if_same_t <try_reset_t <_Tp>, bool>,
use_if_same_t <try_rw_t <_Tp>, byte_t>,
use_if_same_t <try_rx1_t <_Tp>, byte_t>,
use_if_same_t <try_rx2_t <_Tp>, size_t>,
use_if_same_t <try_tx1_t <_Tp>, size_t>,
use_if_same_t <try_tx2_t <_Tp>, size_t>,
//use_if_same_t <try_rx2_t <_Tp>, size_t>,
use_if_same_t <try_tx1_t <_Tp>, byte_t>,
//use_if_same_t <try_tx2_t <_Tp>, size_t>,
use_if_same_t <try_match_t<_Tp>, void>,
use_if_same_t <try_match_n_ovdr_t<_Tp>, void>,
use_if_same_t <try_skip_t<_Tp>, void>,
@@ -691,7 +702,7 @@ namespace utl {
use_if_same_t <try_next_t <_Tp>, _1wire_id_t>
> //!^ SFINAE may apply
> : true_ {};
}
} // namespace _1wire_i_det
/*!
* Value meta-programming function for 1-wire interface checking
@@ -699,7 +710,7 @@ namespace utl {
* \return True if _Tp is a 1-wire interface
*/
template <typename _Tp>
constexpr bool _1wire_c = _1wire_i_cnpt::is_1wire_<_Tp>::value;
constexpr bool _1wire_c = _1wire_i_det::is_1wire_<_Tp>::value;
#endif
//!@}


+ 47
- 126
include/utl/com/_1wire_uart.h View File

@@ -3,9 +3,9 @@
* \brief
* A 1-wire implementation using a microprocessor's uart for bit timing
* \note
* This 1-wire implementation is based on MCU UART io functionality. In order
* to work it needs:
* 1) A Open drain tx and floating(or pull-up) rx UART pin configuration with both pins
* This 1-wire implementation is based on MCU UART functionality. The implementation
* expects:
* 1) An Open drain tx and a floating(or pull-up) rx UART pin configuration with both pins
* connected to the 1-wire bus wire
* 2) A Transmit/receive function even in blocking/polling mode
* 3) A baudrate set function
@@ -70,19 +70,13 @@ namespace utl {
* \note
* In order for the implementation to have the following as private members
* it also need to declare this class as friend
* for ex:
* class Foo : public _1wire_uart<Foo> {
* friend _1wire_uart<Foo>;
* byte_t UART_RW (byte_t byte);
* void UART_BR (uint32_t br);
* // ...
* };
*/
//!@{
private:
/*!
* \brief
* Implementers's (driver) read-write function. We use the following USART configuration.
* Implementers's (driver) read-write function. We expect the following
* USART configuration:
* - Word Length = 8 Bits
* - Stop Bit = One Stop bit
* - Parity = No parity
@@ -114,55 +108,22 @@ namespace utl {
};
Speed _speed {Speed::STD};
Speed speed () { return _speed; } //!< Get the 1-wire bus speed
void speed (Speed s); //!< Set the 1-wire bus speed
Speed speed () const { return _speed; } //!< Get the 1-wire bus speed
void speed (Speed s); //!< Set the 1-wire bus speed
/*!
* \brief
* Read a bit from the 1-Wire bus, return it and provide
* the recovery time.
* Send a 1-Wire write bit and read the response
*
* --- - - - - - - - - - - - - - - - - ------
* Read \ / X X X X X X X X X X X X X X X /
* ---- - - - - - - - - - - - - - - - -
* RS: | | | | | | | | | | |
* bit: ST 0 1 2 3 4 5 6 7 SP
* < ------------- 87/11 usec ------------->
* ^
* |
* Master sample
*
* 8 bits, no parity, 1 stop
* standard: BR: 115200
* Overdrive: BR: 921600
* TX: 0xFF
* RX: {1 - 0xFF, 0 - [0x00 - 0xFE] }
*
* \return The answer
* \arg 0 Read 0
* \arg 1 Read 1 (This is also returned on transition error).
*/
bool bit () {
return (impl().UART_RW (0xFF) < 0xFF);
}
/*!
* \brief
* Send a 1-Wire write bit
* 8 bits, no parity, 1 stop
* standard: BR: 115200
* Overdrive: BR: 921600
*
* --- --------------------------------------
* Write 1 \ /
* Write 1 --- --------------------------------------
* Read 0/1 \ /
* ----
* RS: | | | | | | | | | | |
* bit: ST 0 1 2 3 4 5 6 7 SP
* TX: 0xFF RX: 0xFF
* TX: 0xFF RX: 0xFF->1, less->0
*
* --- ------
* Write 0 \ /
* Write 0 --- ------
* Read 0 \ /
* -------------------------------------
* RS: | | | | | | | | | | |
* bit: ST 0 1 2 3 4 5 6 7 SP
@@ -170,15 +131,17 @@ namespace utl {
* TX: 0x00 RX: 0x00
*
* \param b The bit to send
* \return Status of the operation
* \arg 0 Fail
* \arg 1 Success
* \return The response
*/
bool bit (bool b) {
uint8_t w = (b) ? 0xFF : 0x00; // Select write frame to send
return (w == impl().UART_RW (w)); // Return status
if (b)
return (UART_RW (0xFF) < 0xFF) ? 0 : 1;
else {
UART_RW (0x00);
return 0;
}
}
bool _reset ();
bool _reset (Speed s);
//!@}
};
@@ -192,15 +155,14 @@ namespace utl {
template <typename Impl_t>
void _1wire_uart_i<Impl_t>::speed (Speed s) {
switch (_speed = s) {
case Speed::STD: impl().UART_BR (BR_STD); break;
case Speed::OVDR: impl().UART_BR (BR_OVR); break;
case Speed::STD: UART_BR (BR_STD); break;
case Speed::OVDR: UART_BR (BR_OVR); break;
}
}
/*!
* \brief
* Generate a 1-wire reset
*
* --- ---- - - - -------
* Reset \ / \ X X X /
* -------------------- - - - -
@@ -208,12 +170,7 @@ namespace utl {
* bit: ST 0 1 2 3 4 5 6 7 SP
* < ---------- 1024/174 usec ------------->
*
* 8 bits, no parity, 1 stop
* Standard: Overdrive :
* BR: 9600, BR: 57600
* TX: 0xF0, TX: 0xF8
* RX: 0xF0 not present RX: 0xF8 not present
* less if present less if present
* TX: (STD)0xF0, (OVDR)0xF8 RX: less if present
*
* \param t Timing
* \return The status of the operation
@@ -221,9 +178,9 @@ namespace utl {
* \arg 1 Success
*/
template <typename Impl_t>
bool _1wire_uart_i<Impl_t>::_reset () {
bool _1wire_uart_i<Impl_t>::_reset (Speed s) {
// Select frame to send
uint8_t w = (_speed == Speed::STD) ? 0xF0 : 0xF8;
uint8_t w = ((_speed = s) == Speed::STD) ? 0xF0 : 0xF8;
// Select baudrate
impl().UART_BR ((_speed == Speed::STD) ? BR_STD_RST : BR_OVR_RST);
// Send frame and check the result
@@ -259,7 +216,8 @@ namespace utl {
private:
/*!
* \brief
* Implementers's (driver) read-write function. We use the following USART configuration.
* Implementers's (driver) read-write function. We use the following
* USART configuration:
* - Word Length = 8 Bits
* - Stop Bit = One Stop bit
* - Parity = No parity
@@ -291,55 +249,22 @@ namespace utl {
};
Speed _speed {Speed::STD};
Speed speed () { return _speed; } //!< Get the 1-wire bus speed
void speed (Speed s); //!< Set the 1-wire bus speed
Speed speed () const { return _speed; } //!< Get the 1-wire bus speed
void speed (Speed s); //!< Set the 1-wire bus speed
/*!
* \brief
* Read a bit from the 1-Wire bus, return it and provide
* the recovery time.
* Send a 1-Wire write bit and read the response
*
* --- - - - - - - - - - - - - - - - - ------
* Read \ / X X X X X X X X X X X X X X X /
* ---- - - - - - - - - - - - - - - - -
* RS: | | | | | | | | | | |
* bit: ST 0 1 2 3 4 5 6 7 SP
* < ------------- 87/11 usec ------------->
* ^
* |
* Master sample
*
* 8 bits, no parity, 1 stop
* standard: BR: 115200
* Overdrive: BR: 921600
* TX: 0xFF
* RX: {1 - 0xFF, 0 - [0x00 - 0xFE] }
*
* \return The answer
* \arg 0 Read 0
* \arg 1 Read 1 (This is also returned on transition error).
*/
bool bit () {
return (UART_RW (0xFF) < 0xFF);
}
/*!
* \brief
* Send a 1-Wire write bit
* 8 bits, no parity, 1 stop
* standard: BR: 115200
* Overdrive: BR: 921600
*
* --- --------------------------------------
* Write 1 \ /
* Write 1 --- --------------------------------------
* Read 0/1 \ /
* ----
* RS: | | | | | | | | | | |
* bit: ST 0 1 2 3 4 5 6 7 SP
* TX: 0xFF RX: 0xFF
* TX: 0xFF RX: 0xFF->1, less->0
*
* --- ------
* Write 0 \ /
* Write 0 --- ------
* Read 0 \ /
* -------------------------------------
* RS: | | | | | | | | | | |
* bit: ST 0 1 2 3 4 5 6 7 SP
@@ -347,15 +272,17 @@ namespace utl {
* TX: 0x00 RX: 0x00
*
* \param b The bit to send
* \return Status of the operation
* \arg 0 Fail
* \arg 1 Success
* \return The response
*/
bool bit (bool b) {
uint8_t w = (b) ? 0xFF : 0x00; // Select write frame to send
return (w == UART_RW (w)); // Return status
if (b)
return (UART_RW (0xFF) < 0xFF) ? 0 : 1;
else {
UART_RW (0x00);
return 0;
}
}
bool _reset ();
bool _reset (Speed s);
//!@}
};
@@ -376,7 +303,6 @@ namespace utl {
/*!
* \brief
* Generate a 1-wire reset
*
* --- ---- - - - -------
* Reset \ / \ X X X /
* -------------------- - - - -
@@ -384,21 +310,16 @@ namespace utl {
* bit: ST 0 1 2 3 4 5 6 7 SP
* < ---------- 1024/174 usec ------------->
*
* 8 bits, no parity, 1 stop
* Standard: Overdrive :
* BR: 9600, BR: 57600
* TX: 0xF0, TX: 0xF8
* RX: 0xF0 not present RX: 0xF8 not present
* less if present less if present
* TX: (STD)0xF0, (OVDR)0xF8 RX: less if present
*
* \param t Timing
* \return The status of the operation
* \arg 0 Fail
* \arg 1 Success
*/
bool _1wire_uart_i<virtual_tag>::_reset () {
bool _1wire_uart_i<virtual_tag>::_reset (Speed s) {
// Select frame to send
uint8_t w = (_speed == Speed::STD) ? 0xF0 : 0xF8;
uint8_t w = ((_speed = s) == Speed::STD) ? 0xF0 : 0xF8;
// Select baudrate
UART_BR ((_speed == Speed::STD) ? BR_STD_RST : BR_OVR_RST);
// Send frame and check the result


+ 1
- 1
include/utl/container/id.h View File

@@ -1,6 +1,6 @@
/*!
* \file utl/container/id.h
* \brief A container for device ID's
* \brief A container for device IDs
*
* Copyright (C) 2018 Christos Choutouridis
*


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