Peter M. Groen / CppLinuxSerial

Commit 41a7880e81894c34b237d4c7c1ba82d417af86c4

Authored by Geoffrey Hunter
1 parent 819155b9

- Added support for setting the num. data bits. 

- Added support for setting the parity.
- Added support for setting the num. stop bits.
Inline Side-by-side
Showing 7 changed files with 684 additions and 63 deletions
.vscode/c_cpp_properties.json
  View file @41a7880
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... ... @@ -40,52 +33,559 @@
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  411 + "__UINT_LEAST32_MAX__=0xffffffffUL",
  412 + "__SACCUM_FBIT__=7",
  413 + "__FLT32_DENORM_MIN__=1.40129846e-45F32",
  414 + "__GCC_ATOMIC_LONG_LOCK_FREE=1",
  415 + "__SIG_ATOMIC_WIDTH__=8",
  416 + "__INT_LEAST64_TYPE__=long long int",
  417 + "__INT16_TYPE__=int",
  418 + "__INT_LEAST8_TYPE__=signed char",
  419 + "__SQ_FBIT__=31",
  420 + "__DEC32_MAX_EXP__=97",
  421 + "__INT_FAST8_MAX__=0x7f",
  422 + "__INTPTR_MAX__=0x7fff",
  423 + "__QQ_FBIT__=7",
  424 + "__cpp_range_based_for=200907",
  425 + "__UTA_IBIT__=16",
  426 + "__AVR_ERRATA_SKIP__=1",
  427 + "__FLT32_MIN_10_EXP__=(-37)",
  428 + "__LDBL_MANT_DIG__=24",
  429 + "__SFRACT_FBIT__=7",
  430 + "__SACCUM_MIN__=(-0X1P7HK-0X1P7HK)",
  431 + "__DBL_HAS_QUIET_NAN__=1",
  432 + "__SIG_ATOMIC_MIN__=(-__SIG_ATOMIC_MAX__ - 1)",
  433 + "AVR=1",
  434 + "__BUILTIN_AVR_FMULS=1",
  435 + "__cpp_return_type_deduction=201304",
  436 + "__INTPTR_TYPE__=int",
  437 + "__UINT16_TYPE__=unsigned int",
  438 + "__WCHAR_TYPE__=int",
  439 + "__SIZEOF_FLOAT__=4",
  440 + "__AVR__=1",
  441 + "__BUILTIN_AVR_INSERT_BITS=1",
  442 + "__USQ_FBIT__=32",
  443 + "__UINTPTR_MAX__=0xffffU",
  444 + "__INT_FAST64_WIDTH__=64",
  445 + "__DEC64_MIN_EXP__=(-382)",
  446 + "__cpp_decltype=200707",
  447 + "__FLT32_DECIMAL_DIG__=9",
  448 + "__INT_FAST64_MAX__=0x7fffffffffffffffLL",
  449 + "__GCC_ATOMIC_TEST_AND_SET_TRUEVAL=1",
  450 + "__FLT_DIG__=6",
  451 + "__UINT_FAST64_TYPE__=long long unsigned int",
  452 + "__BUILTIN_AVR_BITSHK=1",
  453 + "__BUILTIN_AVR_BITSHR=1",
  454 + "__INT_MAX__=0x7fff",
  455 + "__LACCUM_FBIT__=31",
  456 + "__USACCUM_MIN__=0.0UHK",
  457 + "__UHA_IBIT__=8",
  458 + "__INT64_TYPE__=long long int",
  459 + "__BUILTIN_AVR_BITSLK=1",
  460 + "__BUILTIN_AVR_BITSLR=1",
  461 + "__FLT_MAX_EXP__=128",
  462 + "__UTQ_IBIT__=0",
  463 + "__DBL_MANT_DIG__=24",
  464 + "__cpp_inheriting_constructors=201511",
  465 + "__BUILTIN_AVR_ULLKBITS=1",
  466 + "__INT_LEAST64_MAX__=0x7fffffffffffffffLL",
  467 + "__DEC64_MIN__=1E-383DD",
  468 + "__WINT_TYPE__=int",
  469 + "__UINT_LEAST32_TYPE__=long unsigned int",
  470 + "__SIZEOF_SHORT__=2",
  471 + "__ULLFRACT_IBIT__=0",
  472 + "__LDBL_MIN_EXP__=(-125)",
  473 + "__UDA_IBIT__=32",
  474 + "__WINT_WIDTH__=16",
  475 + "__INT_LEAST8_MAX__=0x7f",
  476 + "__LFRACT_FBIT__=31",
  477 + "__LDBL_MAX_10_EXP__=38",
  478 + "__ATOMIC_RELAXED=0",
  479 + "__DBL_EPSILON__=double(1.19209290e-7L)",
  480 + "__BUILTIN_AVR_BITSUK=1",
  481 + "__BUILTIN_AVR_BITSUR=1",
  482 + "__UINT8_C(c)=c",
  483 + "__INT_LEAST32_TYPE__=long int",
  484 + "__BUILTIN_AVR_URBITS=1",
  485 + "__SIZEOF_WCHAR_T__=2",
  486 + "__LLFRACT_MAX__=0X7FFFFFFFFFFFFFFFP-63LLR",
  487 + "__TQ_FBIT__=127",
  488 + "__INT_FAST8_TYPE__=signed char",
  489 + "__ULLACCUM_EPSILON__=0x1P-48ULLK",
  490 + "__BUILTIN_AVR_ROUNDK=1",
  491 + "__BUILTIN_AVR_ROUNDR=1",
  492 + "__UHQ_IBIT__=0",
  493 + "__LLACCUM_IBIT__=16",
  494 + "__FLT32_EPSILON__=1.19209290e-7F32",
  495 + "__DBL_DECIMAL_DIG__=9",
  496 + "__STDC_UTF_32__=1",
  497 + "__INT_FAST8_WIDTH__=8",
  498 + "__DEC_EVAL_METHOD__=2",
  499 + "__TA_FBIT__=47",
  500 + "__UDQ_IBIT__=0",
  501 + "__ORDER_BIG_ENDIAN__=4321",
  502 + "__cpp_runtime_arrays=198712",
  503 + "__WITH_AVRLIBC__=1",
  504 + "__UINT64_TYPE__=long long unsigned int",
  505 + "__ACCUM_EPSILON__=0x1P-15K",
  506 + "__UINT32_C(c)=c ## UL",
  507 + "__BUILTIN_AVR_COUNTLSUHK=1",
  508 + "__INTMAX_MAX__=0x7fffffffffffffffLL",
  509 + "__cpp_alias_templates=200704",
  510 + "__BUILTIN_AVR_COUNTLSUHR=1",
  511 + "__BYTE_ORDER__=__ORDER_LITTLE_ENDIAN__",
  512 + "__FLT_DENORM_MIN__=1.40129846e-45F",
  513 + "__LLFRACT_IBIT__=0",
  514 + "__INT8_MAX__=0x7f",
  515 + "__LONG_WIDTH__=32",
  516 + "__UINT_FAST32_TYPE__=long unsigned int",
  517 + "__CHAR32_TYPE__=long unsigned int",
  518 + "__BUILTIN_AVR_COUNTLSULK=1",
  519 + "__BUILTIN_AVR_COUNTLSULR=1",
  520 + "__FLT_MAX__=3.40282347e+38F",
  521 + "__cpp_constexpr=201304",
  522 + "__USACCUM_FBIT__=8",
  523 + "__BUILTIN_AVR_COUNTLSFX=1",
  524 + "__INT32_TYPE__=long int",
  525 + "__SIZEOF_DOUBLE__=4",
  526 + "__FLT_MIN_10_EXP__=(-37)",
  527 + "__UFRACT_EPSILON__=0x1P-16UR",
  528 + "__INT_LEAST32_WIDTH__=32",
  529 + "__BUILTIN_AVR_COUNTLSHK=1",
  530 + "__BUILTIN_AVR_COUNTLSHR=1",
  531 + "__INTMAX_TYPE__=long long int",
  532 + "__BUILTIN_AVR_ABSLLK=1",
  533 + "__BUILTIN_AVR_ABSLLR=1",
  534 + "__DEC128_MAX_EXP__=6145",
  535 + "__AVR_HAVE_16BIT_SP__=1",
  536 + "__ATOMIC_CONSUME=1",
  537 + "__GNUC_MINOR__=3",
  538 + "__INT_FAST16_WIDTH__=16",
  539 + "__UINTMAX_MAX__=0xffffffffffffffffULL",
  540 + "__DEC32_MANT_DIG__=7",
  541 + "__HA_FBIT__=7",
  542 + "__BUILTIN_AVR_COUNTLSLK=1",
  543 + "__BUILTIN_AVR_COUNTLSLR=1",
  544 + "__BUILTIN_AVR_CLI=1",
  545 + "__DBL_MAX_10_EXP__=38",
  546 + "__LDBL_DENORM_MIN__=1.40129846e-45L",
  547 + "__INT16_C(c)=c",
  548 + "__cpp_generic_lambdas=201304",
  549 + "__STDC__=1",
  550 + "__PTRDIFF_TYPE__=int",
  551 + "__LLFRACT_MIN__=(-0.5LLR-0.5LLR)",
  552 + "__BUILTIN_AVR_LRBITS=1",
  553 + "__ATOMIC_SEQ_CST=5",
  554 + "__DA_FBIT__=31",
  555 + "__UINT32_TYPE__=long unsigned int",
  556 + "__BUILTIN_AVR_ROUNDLLK=1",
  557 + "__UINTPTR_TYPE__=unsigned int",
  558 + "__BUILTIN_AVR_ROUNDLLR=1",
  559 + "__USA_IBIT__=16",
  560 + "__BUILTIN_AVR_ULRBITS=1",
  561 + "__DEC64_SUBNORMAL_MIN__=0.000000000000001E-383DD",
  562 + "__DEC128_MANT_DIG__=34",
  563 + "__LDBL_MIN_10_EXP__=(-37)",
  564 + "__BUILTIN_AVR_COUNTLSUK=1",
  565 + "__BUILTIN_AVR_COUNTLSUR=1",
  566 + "__SIZEOF_LONG_LONG__=8",
  567 + "__ULACCUM_EPSILON__=0x1P-32ULK",
  568 + "__cpp_user_defined_literals=200809",
  569 + "__SACCUM_IBIT__=8",
  570 + "__GCC_ATOMIC_LLONG_LOCK_FREE=1",
  571 + "__LDBL_DIG__=6",
  572 + "__FLT_DECIMAL_DIG__=9",
  573 + "__UINT_FAST16_MAX__=0xffffU",
  574 + "__GCC_ATOMIC_SHORT_LOCK_FREE=1",
  575 + "__BUILTIN_AVR_ABSHK=1",
  576 + "__BUILTIN_AVR_FLASH_SEGMENT=1",
  577 + "__INT_LEAST64_WIDTH__=64",
  578 + "__ULLFRACT_MAX__=0XFFFFFFFFFFFFFFFFP-64ULLR",
  579 + "__UINT_FAST8_TYPE__=unsigned char",
  580 + "__USFRACT_EPSILON__=0x1P-8UHR",
  581 + "__ULACCUM_FBIT__=32",
  582 + "__QQ_IBIT__=0",
  583 + "__cpp_init_captures=201304",
  584 + "__ATOMIC_ACQ_REL=4",
  585 + "__ATOMIC_RELEASE=3",
  586 + "__BUILTIN_AVR_FMUL=1",
  587 + "USBCON"
  588 + ]
88 589 }
89   - ],
90   - "version": 4
  590 + ]
91 591 }
92 592 \ No newline at end of file
... ...
CHANGELOG.md
  View file @41a7880
... ... @@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
5 5 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
6 6 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
7 7  
  8 +## [v2.3.0] - 2021-12-23
  9 +
  10 +- Added support for setting the num. data bits.
  11 +- Added support for setting the parity.
  12 +- Added support for setting the num. stop bits.
  13 +
8 14 ## [v2.2.1] - 2021-12-06
9 15  
10 16 - Fixed a build error by changing the branch cmake downloads googletest from master to main.
... ...
README.md
  View file @41a7880
... ... @@ -67,8 +67,8 @@ Library for communicating with COM ports on a Linux system.
67 67 using namespace mn::CppLinuxSerial;
68 68  
69 69 int main() {
70   - // Create serial port object and open serial port
71   - SerialPort serialPort("/dev/ttyUSB0", BaudRate::B_57600);
  70 + // Create serial port object and open serial port at 57600 buad, 8 data bits, no parity bit, and one stop bit (8n1)
  71 + SerialPort serialPort("/dev/ttyUSB0", BaudRate::B_57600, NumDataBits::EIGHT, Parity::NONE, NumStopBits::ONE);
72 72 // Use SerialPort serialPort("/dev/ttyACM0", 13000); instead if you want to provide a custom baud rate
73 73 serialPort.SetTimeout(-1); // Block when reading until any data is received
74 74 serialPort.Open();
... ...
include/CppLinuxSerial/SerialPort.hpp
  View file @41a7880
... ... @@ -61,6 +61,26 @@ namespace mn {
61 61 B_CUSTOM, // Placeholder
62 62 };
63 63  
  64 + /// \brief Enumeration of all the valid num. of data bits. Must align with the options
  65 + /// provided in termbits.h, i.e. CS5, CS6, CS7 and CS8.
  66 + enum class NumDataBits {
  67 + FIVE,
  68 + SIX,
  69 + SEVEN,
  70 + EIGHT,
  71 + };
  72 +
  73 + enum class Parity {
  74 + NONE,
  75 + EVEN,
  76 + ODD,
  77 + };
  78 +
  79 + enum class NumStopBits {
  80 + ONE,
  81 + TWO,
  82 + };
  83 +
64 84 /// \brief Represents the state of the serial port.
65 85 enum class State {
66 86 CLOSED,
... ... @@ -77,7 +97,10 @@ namespace mn {
77 97 /// \brief Constructor that sets up serial port with the basic (required) parameters.
78 98 SerialPort(const std::string &device, BaudRate baudRate);
79 99  
80   - /// \brief Constructor that sets up serial port with the basic (required) parameters.
  100 + /// \brief Constructor that sets up serial port and allows the user to specify all the common parameters.
  101 + SerialPort(const std::string &device, BaudRate baudRate, NumDataBits numDataBits, Parity parity, NumStopBits numStopBits);
  102 +
  103 + /// \brief Constructor that sets up serial port with the basic parameters, and a custom baud rate.
81 104 SerialPort(const std::string &device, speed_t baudRate);
82 105  
83 106 /// \brief Destructor. Closes serial port if still open.
... ... @@ -87,12 +110,20 @@ namespace mn {
87 110 /// \details Method can be called when serial port is in any state.
88 111 void SetDevice(const std::string &device);
89 112  
90   - /// \brief Allows the user to set a standard baud rate.
  113 + /// \brief Call this to set a standard baud rate.
91 114 void SetBaudRate(BaudRate baudRate);
92 115  
93   - /// \brief Allows the user to set a custom baud rate.
  116 + /// \brief Call this to set a custom baud rate.
94 117 void SetBaudRate(speed_t baudRate);
95 118  
  119 + /// \brief Call this to set the num. of data bits.
  120 + void SetNumDataBits(NumDataBits numDataBits);
  121 +
  122 + /// \brief Call this to set the parity.
  123 + void SetParity(Parity parity);
  124 +
  125 + void SetNumStopBits(NumStopBits numStopBits);
  126 +
96 127 /// \brief Sets the read timeout (in milliseconds)/blocking mode.
97 128 /// \details Only call when state != OPEN. This method manupulates VMIN and VTIME.
98 129 /// \param timeout_ms Set to -1 to infinite timeout, 0 to return immediately with any data (non
... ... @@ -169,6 +200,15 @@ namespace mn {
169 200 /// \brief The current baud rate if baudRateType_ == CUSTOM.
170 201 speed_t baudRateCustom_;
171 202  
  203 + /// \brief The num. of data bits. Defaults to 8 (most common).
  204 + NumDataBits numDataBits_ = NumDataBits::EIGHT;
  205 +
  206 + /// \brief The parity. Defaults to none (most common).
  207 + Parity parity_ = Parity::NONE;
  208 +
  209 + /// \brief The num. of stop bits. Defaults to 1 (most common).
  210 + NumStopBits numStopBits_ = NumStopBits::ONE;
  211 +
172 212 /// \brief The file descriptor for the open file. This gets written to when Open() is called.
173 213 int fileDesc_;
174 214  
... ...
src/SerialPort.cpp
  View file @41a7880
... ... @@ -58,6 +58,16 @@ namespace CppLinuxSerial {
58 58 baudRateCustom_ = baudRate;
59 59 }
60 60  
  61 + SerialPort::SerialPort(const std::string& device, BaudRate baudRate, NumDataBits numDataBits, Parity parity, NumStopBits numStopBits) :
  62 + SerialPort() {
  63 + device_ = device;
  64 + baudRateType_ = BaudRateType::STANDARD;
  65 + baudRateStandard_ = baudRate;
  66 + numDataBits_ = numDataBits;
  67 + parity_ = parity;
  68 + numStopBits_ = numStopBits;
  69 + }
  70 +
61 71 SerialPort::~SerialPort() {
62 72 try {
63 73 Close();
... ... @@ -73,22 +83,38 @@ namespace CppLinuxSerial {
73 83 ConfigureTermios();
74 84 }
75 85  
76   - void SerialPort::SetBaudRate(BaudRate baudRate) {
77   - std::cout << "standard called\n";
  86 + void SerialPort::SetBaudRate(BaudRate baudRate) {
78 87 baudRateType_ = BaudRateType::STANDARD;
79 88 baudRateStandard_ = baudRate;
80 89 if(state_ == State::OPEN)
81 90 ConfigureTermios();
82 91 }
83 92  
84   - void SerialPort::SetBaudRate(speed_t baudRate) {
85   - std::cout << " custom called\n";
  93 + void SerialPort::SetBaudRate(speed_t baudRate) {
86 94 baudRateType_ = BaudRateType::CUSTOM;
87 95 baudRateCustom_ = baudRate;
88 96 if(state_ == State::OPEN)
89 97 ConfigureTermios();
90 98 }
91 99  
  100 + void SerialPort::SetNumDataBits(NumDataBits numDataBits) {
  101 + numDataBits_ = numDataBits;
  102 + if(state_ == State::OPEN)
  103 + ConfigureTermios();
  104 + }
  105 +
  106 + void SerialPort::SetParity(Parity parity) {
  107 + parity_ = parity;
  108 + if(state_ == State::OPEN)
  109 + ConfigureTermios();
  110 + }
  111 +
  112 + void SerialPort::SetNumStopBits(NumStopBits numStopBits) {
  113 + numStopBits_ = numStopBits;
  114 + if(state_ == State::OPEN)
  115 + ConfigureTermios();
  116 + }
  117 +
92 118 void SerialPort::Open()
93 119 {
94 120  
... ... @@ -132,10 +158,57 @@ namespace CppLinuxSerial {
132 158  
133 159 //================= (.c_cflag) ===============//
134 160  
135   - tty.c_cflag &= ~PARENB; // No parity bit is added to the output characters
136   - tty.c_cflag &= ~CSTOPB; // Only one stop-bit is used
  161 + // Set num. data bits
  162 + // See https://man7.org/linux/man-pages/man3/tcflush.3.html
137 163 tty.c_cflag &= ~CSIZE; // CSIZE is a mask for the number of bits per character
138   - tty.c_cflag |= CS8; // Set to 8 bits per character
  164 + switch(numDataBits_) {
  165 + case NumDataBits::FIVE:
  166 + tty.c_cflag |= CS5;
  167 + break;
  168 + case NumDataBits::SIX:
  169 + tty.c_cflag |= CS6;
  170 + break;
  171 + case NumDataBits::SEVEN:
  172 + tty.c_cflag |= CS7;
  173 + break;
  174 + case NumDataBits::EIGHT:
  175 + tty.c_cflag |= CS8;
  176 + break;
  177 + default:
  178 + THROW_EXCEPT("numDataBits_ value not supported!");
  179 + }
  180 +
  181 + // Set parity
  182 + // See https://man7.org/linux/man-pages/man3/tcflush.3.html
  183 + switch(parity_) {
  184 + case Parity::NONE:
  185 + tty.c_cflag &= ~PARENB;
  186 + break;
  187 + case Parity::EVEN:
  188 + tty.c_cflag |= PARENB;
  189 + tty.c_cflag &= ~PARODD; // Clearing PARODD makes the parity even
  190 + break;
  191 + case Parity::ODD:
  192 + tty.c_cflag |= PARENB;
  193 + tty.c_cflag |= PARODD;
  194 + break;
  195 + default:
  196 + THROW_EXCEPT("parity_ value not supported!");
  197 +
  198 + }
  199 +
  200 + // Set num. stop bits
  201 + switch(numStopBits_) {
  202 + case NumStopBits::ONE:
  203 + tty.c_cflag &= ~CSTOPB;
  204 + break;
  205 + case NumStopBits::TWO:
  206 + tty.c_cflag |= CSTOPB;
  207 + break;
  208 + default:
  209 + THROW_EXCEPT("numStopBits_ value not supported!");
  210 + }
  211 +
139 212 tty.c_cflag &= ~CRTSCTS; // Disable hadrware flow control (RTS/CTS)
140 213 tty.c_cflag |= CREAD | CLOCAL; // Turn on READ & ignore ctrl lines (CLOCAL = 1)
141 214  
... ...
test/arduino/Basic/Basic.ino
  View file @41a7880
... ... @@ -13,7 +13,9 @@
13 13 // the setup routine runs once when you press reset:
14 14 void setup() {
15 15 // initialize serial communication at 9600 bits per second:
16   - Serial.begin(9600);
  16 + // Serial.begin(9600);
  17 + // Serial.begin(9600, SERIAL_5N1); // 5 data bits, no parity, 1 stop bit
  18 + Serial.begin(9600, SERIAL_8E2); // 8 data bits, even parity, 2 stop bits
17 19 // Serial.begin(81234); // Used to test custom baud rates
18 20 }
19 21  
... ...
test/arduino/main.cpp
  View file @41a7880
... ... @@ -4,7 +4,7 @@ using namespace mn::CppLinuxSerial;
4 4  
5 5 int main() {
6 6 // Create serial port object and open serial port
7   - SerialPort serialPort("/dev/ttyACM0", BaudRate::B_9600);
  7 + SerialPort serialPort("/dev/ttyACM0", BaudRate::B_9600, NumDataBits::EIGHT, Parity::NONE, NumStopBits::ONE);
8 8 // SerialPort serialPort("/dev/ttyACM0", 13000);
9 9 serialPort.SetTimeout(-1); // Block when reading until any data is received
10 10 serialPort.Open();
... ...