remove spurious emacs file

samd/.gitignore

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+.pio

samd/include/README

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+
+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

samd/include/RgbDriver.h

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+/*
+ * rgbDriver.h - Library for controlling the TI LT5024 RGB LED driver on the BSides Badge 2020
+ * Reference: https://www.ti.com/lit/ds/symlink/lp5024.pdf
+ * Created by Jordan Johnson, 23 February 2020
+*/
+
+#ifndef RGB_DRIVER_H_
+#define RGB_DRIVER_H_
+
+#include "Arduino.h"
+
+class RgbDriver
+{
+    public:
+        // Set the slave address of the LP5024 driver
+        RgbDriver(char address);
+        // Set Chip_EN=0 to enter STANDBY mode
+        int selectStandbyMode();
+        // Set Chip_EN=1 to enter normal mode
+        int selectNormalMode();
+        // Reset the LP5024
+        int reset();
+        // Set the LP5024 configuration
+        int setDeviceConfig(bool Log_Scale_EN,
+                            bool Power_Save_EN,
+                            bool Auto_Incr_EN,
+                            bool PWM_Dithering_EN,
+                            bool Max_Current_Option,
+                            bool LED_Global_Off);
+        // Enable or disable individual LEDs
+        int setLedConfig(bool LED7_Bank_EN,
+                         bool LED6_Bank_EN,
+                         bool LED5_Bank_EN,
+                         bool LED4_Bank_EN,
+                         bool LED3_Bank_EN,
+                         bool LED2_Bank_EN,
+                         bool LED1_Bank_EN,
+                         bool LED0_Bank_EN);
+        // Set the brightness for all LEDs
+        int setBankBrightness(char bank_brightness);
+        // Set the colour for all LEDs
+        int setBankColour(char red, char green, char blue);
+        // Set the brightness for an individual LED
+        int setLedBrightness(char led, char brightness);
+        // Set the colour for an individual LED
+        int setLedColour(char led, char red, char green, char blue);
+    private:
+        // Transmit data to the LP5025 via I2C
+        int transmit(char addr, char data);
+
+        // Address registers
+        const char DEVICE_CONFIG0 = 0x00;
+        const char DEVICE_CONFIG1 = 0x01;
+        const char LED_CONFIG0 = 0x02;
+        const char BANK_BRIGHTNESS = 0x03;
+        const char BANK_A_COLOR = 0x04;
+        const char BANK_B_COLOR = 0x05;
+        const char BANK_C_COLOR = 0x06;
+        const char RESET = 0x027;
+        // The address of the LP5024
+        char slaveAddress;
+};
+
+#endif // RGB_DRIVER_H_

samd/lib/README

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+
+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 <Foo.h>
+#include <Bar.h>
+
+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

samd/platformio.ini

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+; 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:samd21g18a]
+platform = atmelsam
+board = samd21g18a
+framework = arduino
+
+[env:mkrzero]
+platform = atmelsam
+board = mkrzero
+framework = arduino

samd/src/RgbDriver.cpp

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+/*
+ * rgbDriver.h - Library for controlling the TI LT5024 RGB LED driver on the BSides Badge 2020
+ * Reference: https://www.ti.com/lit/ds/symlink/lp5024.pdf
+ * Created by Jordan Johnson, 23 February 2020
+*/
+
+#include "Arduino.h"
+#include "Wire.h"
+#include "RgbDriver.h"
+
+// Set the slave address of the LP5024 driver
+RgbDriver::RgbDriver(char address)
+{
+    slaveAddress = address;
+}
+
+// Public Methods
+
+// Set Chip_EN=0 to enter STANDBY mode
+int RgbDriver::selectStandbyMode() {
+    return transmit(DEVICE_CONFIG0, 0x00);
+}
+
+// Set Chip_EN=1 to enter normal mode
+int RgbDriver::selectNormalMode() {
+    Wire.begin();
+    return transmit(DEVICE_CONFIG0, 0x40);
+}
+
+// Reset the LP5024
+int RgbDriver::reset() {
+    int status = transmit(RESET, 0xFF);
+    if (status == 0) {
+        status = transmit(RESET, 0x00);
+     }
+    return status;
+}
+
+// Set the LP5024 configuration
+int RgbDriver::setDeviceConfig(bool Log_Scale_EN,
+                               bool Power_Save_EN,
+                               bool Auto_Incr_EN,
+                               bool PWM_Dithering_EN,
+                               bool Max_Current_Option,
+                               bool LED_Global_Off) {
+    char config = Log_Scale_EN * 32 +
+                  Power_Save_EN * 16 +
+                  Auto_Incr_EN * 8 +
+                  PWM_Dithering_EN * 4 +
+                  Max_Current_Option * 2 +
+                  LED_Global_Off;
+    return transmit(DEVICE_CONFIG1, config);
+}
+
+// Enable or disable individual LEDs
+int RgbDriver::setLedConfig(bool LED7_Bank_EN,
+                            bool LED6_Bank_EN,
+                            bool LED5_Bank_EN,
+                            bool LED4_Bank_EN,
+                            bool LED3_Bank_EN,
+                            bool LED2_Bank_EN,
+                            bool LED1_Bank_EN,
+                            bool LED0_Bank_EN) {
+    char config = LED7_Bank_EN * 128 +
+                  LED6_Bank_EN * 64 +
+                  LED5_Bank_EN * 32 +
+                  LED4_Bank_EN * 16 +
+                  LED3_Bank_EN * 8 +
+                  LED2_Bank_EN * 4 +
+                  LED1_Bank_EN * 2 +
+                  LED0_Bank_EN;
+    return transmit(LED_CONFIG0, config);
+}
+
+// Set the brightness for all LEDs
+int RgbDriver::setBankBrightness(char bank_brightness) {
+    return transmit(BANK_BRIGHTNESS, bank_brightness);
+}
+
+// Set the colour for all LEDs
+int RgbDriver::setBankColour(char red, char green, char blue) {
+    // RED
+    int status = transmit(BANK_A_COLOR, red);
+    // GREEN
+    if (status == 0) {
+        transmit(BANK_B_COLOR, green);
+    }
+    // BLUE
+    if (status == 0) {
+        transmit(BANK_C_COLOR, blue);
+    }
+    return status;
+}
+
+// Set the brightness for an individual LED
+int RgbDriver::setLedBrightness(char led, char brightness) {
+    char addr = led + 0x07;
+    return transmit(addr, brightness);
+}
+
+// Set the colour for an individual LED
+int RgbDriver::setLedColour(char led, char red, char green, char blue) {
+    char redAddr = led * 3 + 0x0F;
+    char greenAddr = led * 3 + 0x10;
+    char blueAddr = led * 3 + 0x11;
+    // RED
+    int status = transmit(redAddr, red);
+    // GREEN
+    if (status == 0) {
+        transmit(greenAddr, green);
+    }
+    // BLUE
+    if (status == 0) {
+        transmit(blueAddr, blue);
+    }
+    return status;
+}
+
+// Private Methods
+
+// Transmit data to the LP5025 via I2C
+int RgbDriver::transmit(char addr, char data) {
+    Wire.beginTransmission(slaveAddress);
+    Wire.write(addr);
+    Wire.write(data);
+    return Wire.endTransmission();
+}

samd/src/main.cpp

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+#include <Arduino.h>
+#include "RgbDriver.h"
+
+RgbDriver rgbDriver(0b0101000);
+
+int mapLEDIndex(int idx) {
+    switch(idx) {
+        case 0: return 1;
+        case 1: return 0;
+        case 2: return 7;
+        case 3: return 6;
+        case 4: return 5;
+        case 5: return 4;
+        case 6: return 3;
+        case 7: return 2;
+        default: return -1;
+    }
+}
+
+void setup() {
+  int idx;
+  
+  Serial.begin(115200);
+
+  delay(5000);
+
+  Serial.println("Starting up!");
+  rgbDriver.selectNormalMode();
+  rgbDriver.setDeviceConfig(true, true, true, true, false, false);
+  rgbDriver.setLedConfig(false, false, false, false, false, false, false, false);
+
+  Serial.println("Lighting LEDS");
+
+  for (int i = 0; i< 8; i++) {
+    idx = mapLEDIndex(i);
+    rgbDriver.setLedBrightness(idx, 0x0f);
+    rgbDriver.setLedColour(idx, 0xff, 0x00, 0x99);
+    delay(500);
+  }
+  Serial.println("LEDS Lit!");
+}
+
+
+void loop() {
+
+}
+
+
+
+
+

samd/test/README

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+
+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