From fb4f700b27767fe0cce8171c4e6321db4ac475ec Mon Sep 17 00:00:00 2001 From: Scarlett Date: Sun, 17 Sep 2023 01:58:17 -0500 Subject: [PATCH] initial commit --- include/README | 39 +++++++++++++++ lib/README | 46 ++++++++++++++++++ platformio.ini | 16 +++++++ src/main.cpp | 127 +++++++++++++++++++++++++++++++++++++++++++++++++ test/README | 11 +++++ 5 files changed, 239 insertions(+) create mode 100644 include/README create mode 100644 lib/README create mode 100644 platformio.ini create mode 100644 src/main.cpp create mode 100644 test/README diff --git a/include/README b/include/README new file mode 100644 index 0000000..194dcd4 --- /dev/null +++ b/include/README @@ -0,0 +1,39 @@ + +This directory is intended for project header files. + +A header file is a file containing C declarations and macro definitions +to be shared between several project source files. You request the use of a +header file in your project source file (C, C++, etc) located in `src` folder +by including it, with the C preprocessing directive `#include'. + +```src/main.c + +#include "header.h" + +int main (void) +{ + ... +} +``` + +Including a header file produces the same results as copying the header file +into each source file that needs it. Such copying would be time-consuming +and error-prone. With a header file, the related declarations appear +in only one place. If they need to be changed, they can be changed in one +place, and programs that include the header file will automatically use the +new version when next recompiled. The header file eliminates the labor of +finding and changing all the copies as well as the risk that a failure to +find one copy will result in inconsistencies within a program. + +In C, the usual convention is to give header files names that end with `.h'. +It is most portable to use only letters, digits, dashes, and underscores in +header file names, and at most one dot. + +Read more about using header files in official GCC documentation: + +* Include Syntax +* Include Operation +* Once-Only Headers +* Computed Includes + +https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html diff --git a/lib/README b/lib/README new file mode 100644 index 0000000..6debab1 --- /dev/null +++ b/lib/README @@ -0,0 +1,46 @@ + +This directory is intended for project specific (private) libraries. +PlatformIO will compile them to static libraries and link into executable file. + +The source code of each library should be placed in a an own separate directory +("lib/your_library_name/[here are source files]"). + +For example, see a structure of the following two libraries `Foo` and `Bar`: + +|--lib +| | +| |--Bar +| | |--docs +| | |--examples +| | |--src +| | |- Bar.c +| | |- Bar.h +| | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html +| | +| |--Foo +| | |- Foo.c +| | |- Foo.h +| | +| |- README --> THIS FILE +| +|- platformio.ini +|--src + |- main.c + +and a contents of `src/main.c`: +``` +#include +#include + +int main (void) +{ + ... +} + +``` + +PlatformIO Library Dependency Finder will find automatically dependent +libraries scanning project source files. + +More information about PlatformIO Library Dependency Finder +- https://docs.platformio.org/page/librarymanager/ldf.html diff --git a/platformio.ini b/platformio.ini new file mode 100644 index 0000000..5f47dff --- /dev/null +++ b/platformio.ini @@ -0,0 +1,16 @@ +; PlatformIO Project Configuration File +; +; Build options: build flags, source filter +; Upload options: custom upload port, speed and extra flags +; Library options: dependencies, extra library storages +; Advanced options: extra scripting +; +; Please visit documentation for the other options and examples +; https://docs.platformio.org/page/projectconf.html + +[env:pico] +platform = https://github.com/maxgerhardt/platform-raspberrypi.git +board = pico +framework = arduino +board_build.core = earlephilhower +upload_port = /run/media/scarlett/RPI-RP2/ diff --git a/src/main.cpp b/src/main.cpp new file mode 100644 index 0000000..8ec09c3 --- /dev/null +++ b/src/main.cpp @@ -0,0 +1,127 @@ +#include + +const int ZERO_PIN = 0; +const int ONE_PIN = 1; +char data[35]; +boolean valid = false; +unsigned long timestamp = 0; +int curr_bit = 0; + +void setup(); +void loop(); +void zero_bit(); +void one_bit(); +int parse(); +bool fullParity(); +bool evenParity(); +bool oddParity(); + +void setup() { + attachInterrupt(ZERO_PIN,zero_bit,FALLING); + attachInterrupt(ONE_PIN,one_bit,FALLING); + Serial.begin(9600); +} + +void loop() { + if(valid == true) { + noInterrupts(); + for(int i = 0; i < 35; i++) { + Serial.print(data[i]); + } + Serial.println(); + curr_bit = 0; + valid = false; + + int cardnum = parse(); + if(cardnum != -1) { + Serial.print("Card Number: "); + Serial.println(cardnum); + } else { + Serial.println("Invalid Card Number"); + } + + interrupts(); + } +} + +void zero_bit() { + if((valid == true) || (millis() - timestamp > 100)) { + valid = false; + curr_bit = 0; + } + data[curr_bit++] = '0'; + if(curr_bit>34) { + valid = true; + } + timestamp = millis(); +} + +void one_bit() { +if((valid == true) || (millis() - timestamp > 100)) { + valid = false; + curr_bit = 0; + } + data[curr_bit++] = '1'; + if(curr_bit>34) { + valid = true; + } + timestamp = millis(); +} + +int parse() { + if (sizeof(data) == 35) { + if (fullParity() && evenParity() && oddParity()) { + char cardnum[20]; + for (int i = 14; i < 34; i++) cardnum[i-14] = data[i]; + return strtol(cardnum, NULL, 2); + } + } + + return -1; +} + +bool fullParity() { + int num = 0; + for (int i = 0; i < 34; i++) { + if (data[i] == '1') num++; + } + + if (num % 2 == 0) { + Serial.println("Full parity check passed"); + return true; + } + Serial.println("Full parity check failed"); + return false; +} + +bool evenParity() { + int num = 0; + + for (int i = 2; i < 34; i++) { + if (i == 4 || i == 10 || i == 16 || i == 22 || i == 28) continue; + if (data[i] == '1') num++; + } + + if (num % 2 == 0) { + Serial.println("Even parity check passed"); + return true; + } + Serial.println("Even parity check failed"); + return false; +} + +bool oddParity() { + int num = 0; + + for (int i = 2; i < 34; i++) { + if (i == 5 || i == 9 || i == 13 || i == 17 || i == 21 || i == 25 || i == 29 || i == 33) continue; + if (data[i] == '1') num++; + } + + if (num % 2 == 0) { + Serial.println("Odd parity check passed"); + return true; + } + Serial.println("Odd parity check failed"); + return false; +} \ No newline at end of file diff --git a/test/README b/test/README new file mode 100644 index 0000000..9b1e87b --- /dev/null +++ b/test/README @@ -0,0 +1,11 @@ + +This directory is intended for PlatformIO Test Runner and project tests. + +Unit Testing is a software testing method by which individual units of +source code, sets of one or more MCU program modules together with associated +control data, usage procedures, and operating procedures, are tested to +determine whether they are fit for use. Unit testing finds problems early +in the development cycle. + +More information about PlatformIO Unit Testing: +- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html