wsled interface skeleton

Hello world

README.md

@@ -10,8 +10,8 @@ Scripts are in scripts directory, named appropriately.
 
 ## Development plan: 
 - [x] Create repository.
-- [ ] Build setup, get working hello-world program.
-- [ ] Develop 7-segment display driver for the soburg-v2 board, which uses 32-bit shift registers.
+- [x] Build setup, get working hello-world program.
+- [x] Develop 7-segment display driver for the soburg-v2 board, which uses 32-bit shift registers.
     Ensures functional hardware interaction and interface design.
 - [ ] Develop WS2812b driver, would be nice to have some kind of testing for this.
 - [ ] Develop WS2812b interface. I like the FastLed library for Arduino so might have a lot of similar functionality.
@@ -31,7 +31,7 @@ Scripts are in scripts directory, named appropriately.
 This is basic but hopefully can be good platform for future WS2812b projects.
 
 ## Scripts:
-After cloning: $ ./scripts/repo-setup # installs esp-idf, sets up target configurations
-To build:      $ ./scripts/build.sh
-To flash:      $ ./scripts/flash.sh # note: flash.sh automatically builds
-To monitor:    $ ./scripts/monitor.sh
+After cloning: $ ./scripts/repo-setup # installs esp-idf, sets up target configurations\
+To build:      $ ./scripts/build.sh\
+To flash:      $ ./scripts/flash.sh # note: flash.sh automatically builds\
+To monitor:    $ ./scripts/monitor.sh\

pcb/panel/wombus64_led.kicad_pcb

@@ -22084,7 +22084,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "B1911B"
+		(property "Value" "B1911R"
 			(at 0 -1.43 90)
 			(layer "B.Fab")
 			(uuid "c1484363-b3dc-48b7-9c64-d06df10d96a2")
@@ -22764,7 +22764,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "TBDuF"
+		(property "Value" "100uF"
 			(at 2.5 -5.25 0)
 			(layer "B.Fab")
 			(uuid "a592ba06-f886-4233-b793-557c4b352735")
@@ -26393,7 +26393,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "TBDuF"
+		(property "Value" "100uF"
 			(at 2.5 -5.25 0)
 			(layer "B.Fab")
 			(uuid "036ec2e2-300a-42a7-987d-e4811bf430e0")
@@ -28139,7 +28139,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "TBD"
+		(property "Value" "0.1μF"
 			(at 0 -1.43 90)
 			(layer "B.Fab")
 			(uuid "2125effb-a0e4-4175-9ce6-cce3daef6fd0")
@@ -29018,7 +29018,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "52.3Ω"
+		(property "Value" "52.3kΩ"
 			(at 0 -1.43 90)
 			(layer "B.Fab")
 			(uuid "f8ed0ff3-21fe-4dac-b950-096d117b1132")
@@ -30643,7 +30643,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "TBD"
+		(property "Value" "100pF"
 			(at 0 -1.43 90)
 			(layer "B.Fab")
 			(uuid "f93816e5-03a1-48e1-b93c-11d13f82d8e9")
@@ -31613,7 +31613,7 @@
 				(justify mirror)
 			)
 		)
-		(property "Value" "TBD"
+		(property "Value" "10μF"
 			(at 0 -1.43 0)
 			(layer "B.Fab")
 			(uuid "4ecb6ecd-64d9-4e42-b908-ec3e49aafb1b")
@@ -45894,7 +45894,6 @@
 		(polygon
 			(pts
 				(xy 152 87.5) (xy 153.75 85.5) (xy 154.75 84.5) (xy 149 84.5) (xy 150.75 86.25) (xy 150.75 87.5)
-				(xy 150.75 87.5)
 			)
 		)
 		(filled_polygon

pcb/panel/wombus64_led.kicad_pro

@@ -527,11 +527,23 @@
           "label": "DNP",
           "name": "${DNP}",
           "show": true
+        },
+        {
+          "group_by": false,
+          "label": "#",
+          "name": "${ITEM_NUMBER}",
+          "show": false
+        },
+        {
+          "group_by": false,
+          "label": "Description",
+          "name": "Description",
+          "show": false
         }
       ],
       "filter_string": "",
       "group_symbols": true,
-      "name": "Grouped By Value",
+      "name": "",
       "sort_asc": true,
       "sort_field": "Reference"
     },

pcb/panel/wombus64_led.kicad_sch

@@ -6143,7 +6143,7 @@
 				(justify left)
 			)
 		)
-		(property "Value" "TBD"
+		(property "Value" "0.1μF"
 			(at 330.2 91.948 0)
 			(effects
 				(font
@@ -7559,7 +7559,7 @@
 				(justify right)
 			)
 		)
-		(property "Value" "B1911B"
+		(property "Value" "B1911R"
 			(at 360.68 56.1974 90)
 			(effects
 				(font
@@ -7694,7 +7694,7 @@
 				(justify left)
 			)
 		)
-		(property "Value" "TBDuF"
+		(property "Value" "100uF"
 			(at 365.252 91.948 0)
 			(effects
 				(font
@@ -8055,7 +8055,7 @@
 				(justify left)
 			)
 		)
-		(property "Value" "TBDuF"
+		(property "Value" "100uF"
 			(at 357.632 91.948 0)
 			(effects
 				(font
@@ -8556,8 +8556,8 @@
 				(justify left)
 			)
 		)
-		(property "Value" "TBD"
-			(at 295.91 94.488 0)
+		(property "Value" "10μF"
+			(at 295.402 94.488 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -9264,8 +9264,8 @@
 				(justify left)
 			)
 		)
-		(property "Value" "TBD"
-			(at 342.9 91.948 0)
+		(property "Value" "100pF"
+			(at 341.63 92.456 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -10421,7 +10421,7 @@
 				)
 			)
 		)
-		(property "Value" "52.3Ω"
+		(property "Value" "52.3kΩ"
 			(at 348.488 88.646 90)
 			(effects
 				(font

scripts/build.sh

@@ -8,8 +8,10 @@ export IDF_PATH=${PWD}/lib/esp-idf
 export SDKCONFIG=${PWD}/config/sdkconfig
 export SDKCONFIG_DEFAULTS=${PWD}/config/sdkconfig.defaults
 
+export IDF_PATH_FORCE=1
 . ${IDF_PATH}/export.sh
 
+idf.py set-target esp32s3
 idf.py build
 
 # idk how to put it in the right place

scripts/flash.sh

@@ -8,6 +8,7 @@ export IDF_PATH=${PWD}/lib/esp-idf
 export SDKCONFIG=${PWD}/config/sdkconfig
 export SDKCONFIG_DEFAULTS=${PWD}/config/sdkconfig.defaults
 
+export IDF_PATH_FORCE=1
 . ${IDF_PATH}/export.sh
 
 idf.py fullclean

scripts/monitor.sh

@@ -5,6 +5,7 @@ set -e
 export IDF_TOOLS_PATH=${PWD}/lib/idf-tools
 export IDF_PATH=${PWD}/lib/esp-idf
 
+export IDF_PATH_FORCE=1
 . ${IDF_PATH}/export.sh
 
 idf.py -b 115200 monitor

src/App.cpp

@@ -0,0 +1,28 @@
+
+#include "App.hpp"
+
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+#include "sdkconfig.h"
+
+#include "pins.hpp"
+
+#include "DemoTask.hpp"
+
+App::App() {
+    ESP_LOGI(TAG, "App constructor");
+}
+
+uint32_t App::main() {
+
+    ESP_LOGI(__FILE__, "Running App::main()");
+
+    static DemoTask demoTask{};
+
+    ESP_LOGI(__FILE__, "Starting DemoTask");
+    demoTask.start("DemoTask", 4096, 5, 1);
+
+    return 1;
+}

src/App.hpp

@@ -0,0 +1,21 @@
+
+#pragma once
+
+#include<stdint.h>
+
+class App {
+
+public:
+
+    App();
+    ~App() = default;
+
+    uint32_t main();
+
+private:
+    
+    uint32_t ledState = 0;
+    uint32_t blinkTime = 250;
+    const char *TAG = "app"; // TODO: instead of this for logging you can use __FILE__ or __func__
+
+};

src/CMakeLists.txt

@@ -1,9 +1,14 @@
 
-file(GLOB SRC_FILES "*.c" "*.cpp")
+file(GLOB SRC_FILES
+    "*.c"
+    "*.cpp"
+    "drivers/*.c"
+)
 
 idf_component_register(
     SRCS ${SRC_FILES}
     PRIV_REQUIRES spi_flash
     REQUIRES esp_driver_gpio
+    REQUIRES esp_driver_spi
     INCLUDE_DIRS "."
 )

src/DemoTask.cpp

@@ -0,0 +1,53 @@
+
+#include "DemoTask.hpp"
+
+#include "driver/gpio.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+
+#include "SsdInterface.hpp"
+#include "pins.hpp"
+#include "drivers/wsled.h"
+
+DemoTask::DemoTask() {
+
+}
+
+void DemoTask::run() {
+
+    ESP_LOGI(__FILE__, "Demo Task: run()");
+
+    // ssd device
+    ssd_595_t ssdDev = { gpio_ssd_data, gpio_ssd_clk, gpio_ssd_latch, true };
+    SsdInterface ssd(&ssdDev, ssdDigits);
+
+    // wsled device
+    size_t ledCount = 4;
+    wsled_t wsledDev = { gpio_ws2812b, WS2812B, ledCount};
+    // TODO: wsled interface
+    CRGB ledBuffer[4];
+    wsledInit(&wsledDev, (CRGB**)&ledBuffer);
+
+    uint32_t delay = 500; // ms
+    uint8_t digit = 0;
+
+    while(1) {
+        ssd.writeRaw(&digitMap[digit], 1);
+        digit++;
+        if(digit >= 16) digit = 0;
+
+        //ledBuffer[0] = CRGB{100, 0, 80};
+        wsledFill(CRGB{100, 20, 20});
+        wsledUpdate();
+
+        vTaskDelay(delay / portTICK_PERIOD_MS);
+
+        //ledBuffer[0] = CRGB{0, 0, 10};
+        wsledFill(CRGB{20, 20, 100});
+        wsledUpdate();
+
+        vTaskDelay(delay / portTICK_PERIOD_MS);
+    }
+
+}

src/DemoTask.hpp

@@ -0,0 +1,16 @@
+
+#pragma once
+#include "TaskBase.hpp"
+
+class DemoTask : public TaskBase {
+public:
+    DemoTask();
+
+protected:
+    void run() override;
+
+private:
+
+    const size_t ssdDigits = 4;
+
+};

src/SsdInterface.cpp

@@ -0,0 +1,28 @@
+
+#include "SsdInterface.hpp"
+
+SsdInterface::SsdInterface(const ssd_595_t* device, size_t numDigits) : device_(device), numDigits_(numDigits) {
+
+    shiftInit(device_);
+
+}
+
+STATUS SsdInterface::writeRaw(uint8_t* bytes, size_t numBytes) {
+    shiftBytes(device_, bytes, numBytes);
+    return OKAY;
+}
+
+STATUS SsdInterface::write10(int32_t value) {
+    // TODO: implement
+    return NOT_IMPLEMENTED;
+}
+
+STATUS SsdInterface::write16(int32_t value) {
+    // TODO: implement
+    return NOT_IMPLEMENTED;
+}
+
+STATUS SsdInterface::get(uint8_t* bytes) {
+    // TODO: implement
+    return NOT_IMPLEMENTED;
+}

src/SsdInterface.hpp

@@ -0,0 +1,43 @@
+
+#pragma once
+
+#include "stdint.h"
+
+#include "drivers/ssd.h"
+#include "common.h"
+
+class SsdInterface {
+
+public:
+
+    SsdInterface(const ssd_595_t* device, size_t numDigits);
+    ~SsdInterface() = default;
+
+    // Outputs the data straight to hardware, mostly for testing purposes
+    // bytes: the data to write, with bits targetting an led on the ssd
+    // Returns: execution status
+    STATUS writeRaw(uint8_t* bytes, size_t numBytes);
+
+    // Displays a decimal integer on the ssd
+    // value: the integer to display
+    // Returns: execution status
+    STATUS write10(int32_t value);
+
+    // Displays a hexadecimal integer on the ssd
+    // value: the integer to display
+    // Returns: execution status
+    STATUS write16(int32_t value);
+
+    // Copies the data currently displayed on the ssd to bytes
+    // bytes: place to write to
+    // Returns: execution status
+    STATUS get(uint8_t* bytes);
+
+private:
+
+    const ssd_595_t* device_;
+
+    size_t numDigits_; // number of chained digits
+    uint8_t* data_; // pointer to the data written
+
+};

src/TaskBase.cpp

@@ -0,0 +1,17 @@
+
+#include "TaskBase.hpp"
+
+#include "esp_log.h"
+
+void TaskBase::start(const char* name, uint32_t stackSize, UBaseType_t priority, BaseType_t core) {
+    xTaskCreatePinnedToCore(&TaskBase::taskEntryPoint, name, stackSize, this, priority, &handle, core);
+    return;
+}
+
+void TaskBase::taskEntryPoint(void* param) {
+    auto* task = static_cast<TaskBase*>(param);
+    task->run();
+    vTaskDelete(nullptr);
+
+    return;
+}

src/TaskBase.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+class TaskBase {
+public:
+
+    virtual ~TaskBase() = default;
+
+    void start(const char* name, uint32_t stackSize, UBaseType_t priority, BaseType_t core = tskNO_AFFINITY);
+
+protected:
+    virtual void run() = 0;
+
+private:
+    TaskHandle_t handle = nullptr;
+
+    static void taskEntryPoint(void* param);
+};

src/WsledInterface.cpp

@@ -0,0 +1,21 @@
+
+#include "WsledInterface.hpp"
+
+WsledInterface::WsledInterface(const wsled_t* device) {
+
+}
+
+STATUS WsledInterface::writePixel(CRGB pixel, size_t index) {
+    
+    return OKAY;
+}
+
+STATUS WsledInterface::get(CRGB* pixel, size_t index) {
+
+    return OKAY;
+}
+
+STATUS WsledInterface::flush() {
+
+    return OKAY;
+}

src/WsledInterface.hpp

@@ -0,0 +1,38 @@
+
+#pragma once
+
+#include "stdint.h"
+
+#include "drivers/wsled.h"
+#include "common.h"
+
+class WsledInterface {
+
+public:
+
+    WsledInterface(const wsled_t* device);
+    ~WsledInterface() = default;
+
+    // Sets a pixel in the leds buffer to a particular color
+    // index: the order in the strip of the pixel
+    // Returns: execution status
+    STATUS writePixel(CRGB pixel, size_t index);
+
+    // Copies the color currently in a pixel to the pointer
+    // index: the order in the strip of the pixel 
+    // Returns: execution status
+    STATUS get(CRGB* pixel, size_t index);
+
+    // Writes all the data in the leds buffer to hardware
+    // Returns: execution status
+    STATUS flush();
+
+private:
+
+    const wsled_t* device_;
+
+    static constexpr size_t numLeds_ = 4;
+
+    CRGB leds_[numLeds_];
+
+};

src/common.h

@@ -0,0 +1,8 @@
+
+#pragma once
+
+enum STATUS {
+    OKAY = 0,
+    ERROR = -1,
+    NOT_IMPLEMENTED = -2,
+};

src/drivers/ssd.c

@@ -0,0 +1,59 @@
+
+#include "ssd.h"
+
+#include "esp_rom_sys.h"
+#include "esp_log.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+inline void pulse(gpio_num_t pin) {
+    gpio_set_level(pin, 1);
+    gpio_set_level(pin, 0);
+}
+
+void shiftInit(const ssd_595_t* device) {
+
+    gpio_reset_pin(device->dataPin);
+    gpio_reset_pin(device->clockPin);
+    gpio_reset_pin(device->latchPin);
+
+    gpio_config_t ioConfig = {
+        .mode = GPIO_MODE_OUTPUT,
+        .pin_bit_mask = (1ULL << device->dataPin)  |
+                        (1ULL << device->clockPin) |
+                        (1ULL << device->latchPin),
+    };
+    gpio_config(&ioConfig);
+
+    gpio_set_level(device->dataPin, 0);
+    gpio_set_level(device->clockPin, 0);
+    gpio_set_level(device->latchPin, 0);
+
+    ESP_LOGI(__FILE__, "ssd_595 initialized");
+}
+
+void addDecimal(uint8_t* data) {
+    // TODO: fix
+    // data = (*data | 0x01);
+}
+
+void shiftByte(const ssd_595_t* device, uint8_t byte) {
+    for(int i = 0; i < __CHAR_BIT__ ; i++) {
+        uint32_t level = ((byte >> i) & 0x1) ^ device->commonCathode;
+        gpio_set_level(device->dataPin, level);
+        pulse(device->clockPin);
+    }
+    pulse(device->latchPin);
+}
+
+void shiftBytes(const ssd_595_t* device, uint8_t* bytes, size_t numBytes) {
+    for(size_t i = 0; i < numBytes; i++) {
+        shiftByte(device, bytes[i]);
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif

src/drivers/ssd.h

@@ -0,0 +1,70 @@
+
+#pragma once
+
+#include <stdint.h>
+#include "driver/gpio.h"
+
+#define SSD_DIGIT_MAP_LENGTH 32
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    gpio_num_t dataPin;
+    gpio_num_t clockPin;
+    gpio_num_t latchPin;
+    bool commonCathode; // false = common anode
+} ssd_595_t;
+
+// encoding of digits on the seven segment display
+// 0bxxxxxxxx
+//   ABCDEFG.
+static uint8_t digitMap[SSD_DIGIT_MAP_LENGTH] = { 
+    0xFC, // 0
+    0x60, // 1
+    0xDA, // 2
+    0xF2, // 3
+    0x66, // 4
+    0xB6, // 5
+    0xBE, // 6
+    0xE0, // 7
+    0xFE, // 8
+    0xF6, // 9
+    0xEE, // A
+    0x3E, // B
+    0x9C, // C
+    0x7A, // D
+    0x9E, // E
+    0x8E, // F
+    0x02, // -
+    0x01, // .
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+    0x92, // Error code (not implemented)
+};
+
+// TODO: have these return error codes likewise
+
+void shiftInit(const ssd_595_t* device);
+void pulse(gpio_num_t pin);
+
+void addDecimal(uint8_t* data); // adds a decimal to a single digit
+
+void shiftByte(const ssd_595_t* device, uint8_t byte); // outputs a serial byte, big-endian
+void shiftBytes(const ssd_595_t* device, uint8_t* bytes, size_t numBytes); // outputs multiple bytes
+
+#ifdef __cplusplus
+}
+#endif

src/drivers/wsled.c

@@ -0,0 +1,139 @@
+
+#include "wsled.h"
+
+#include "esp_heap_caps.h"
+#include "esp_log.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+uint16_t* dmaBuffer;
+CRGB* wsledPixels;
+static uint32_t ledCount;
+static uint32_t resetDelay;
+static size_t dmaBufferSize;
+WsledType type;
+
+static spi_settings_t spiSettings = {
+    .host = SPI2_HOST,
+    .dma_chan = SPI_DMA_CH_AUTO,
+    .buscfg =
+        {
+            .miso_io_num = -1,
+            .sclk_io_num = -1,
+            .quadwp_io_num = -1,
+            .quadhd_io_num = -1,
+        },
+    .devcfg =
+        {
+            .clock_speed_hz = 3.2 * 1000 * 1000, // Clock out at 3.2 MHz
+            .mode = 0,                           // SPI mode 0
+            .spics_io_num = -1,                  // CS pin
+            .queue_size = 1,
+            .command_bits = 0,
+            .address_bits = 0,
+            //.flags = SPI_DEVICE_TXBIT_LSBFIRST,
+        },
+};
+
+static const uint16_t timingBits[16] = {
+    0x1111, 0x7111, 0x1711, 0x7711, 0x1171, 0x7171, 0x1771, 0x7771,
+    0x1117, 0x7117, 0x1717, 0x7717, 0x1177, 0x7177, 0x1777, 0x7777};
+
+esp_err_t wsledInit(wsled_t* dev, CRGB** buffer) {
+
+    ESP_LOGI(__FILE__, "Initializing wsled device...");
+
+    type = dev->type;
+    ledCount = dev->numLeds;
+    resetDelay = (dev->type == WS2812B) ? WSLED_12_RESET_TIME : WSLED_15_RESET_TIME;
+
+    ESP_LOGI(__FILE__, "mallocing the wsledPixel buffer with size %u bytes", sizeof(CRGB) * ledCount);
+
+    // 12 bytes for each led + bytes for initial zero and reset state
+    dmaBufferSize = ledCount * 12 + (resetDelay + 1) * 2;
+    wsledPixels = malloc(sizeof(CRGB) * ledCount);
+    if (wsledPixels == NULL) {
+        ESP_LOGI(__FILE__, "Allocating memory failed");
+        return ESP_ERR_NO_MEM;
+    }
+    *buffer = wsledPixels;
+    spiSettings.buscfg.mosi_io_num = dev->pin;
+    spiSettings.buscfg.max_transfer_sz = dmaBufferSize;
+
+    ESP_LOGI(__FILE__, "Initializing spi interface...");
+    if (ESP_OK != spi_bus_initialize(spiSettings.host, &spiSettings.buscfg, spiSettings.dma_chan)) {
+        free(wsledPixels);
+        ESP_LOGI(__FILE__, "SPI initialization failed");
+        return -1;
+    }
+
+    ESP_LOGI(__FILE__, "Adding spi bus device...");
+    if (ESP_OK != spi_bus_add_device(spiSettings.host, &spiSettings.devcfg, &spiSettings.spi)) {
+        free(wsledPixels);
+        ESP_LOGI(__FILE__, "Failed to add spi bus device");
+        return -1;
+    }
+
+    ESP_LOGI(__FILE__, "heap_caps_malloc() with dmaBufferSize=%u...", dmaBufferSize);
+    dmaBuffer = heap_caps_malloc(dmaBufferSize, MALLOC_CAP_DMA);
+    if (NULL == dmaBuffer) {
+        free(wsledPixels);
+        ESP_LOGI(__FILE__, "Failed to heap_caps_malloc");
+        return -1;
+    }
+    return ESP_OK;
+}
+
+esp_err_t wsledFill(CRGB color) {
+    for (int i = 0; i < ledCount; i++) {
+        wsledPixels[i] = color;
+    }
+    return 0;
+}
+
+esp_err_t wsledUpdate() {
+
+    uint32_t n = 0;
+
+    memset(dmaBuffer, 0, dmaBufferSize);
+    dmaBuffer[n++] = 0;
+
+    for (int i = 0; i < ledCount; i++) {
+
+        CRGB currentPixel = wsledPixels[i];
+
+        uint8_t b0 = (type == WS2812B) ? currentPixel.g : currentPixel.r;
+        uint8_t b1 = (type == WS2812B) ? currentPixel.r : currentPixel.g;
+        uint8_t b2 = currentPixel.b;
+
+        // Green
+        dmaBuffer[n++] = timingBits[(b0 >> 4) & 0x0F];
+        dmaBuffer[n++] = timingBits[b0 & 0x0F];
+
+        // Red
+        dmaBuffer[n++] = timingBits[(b1 >> 4) & 0x0F];
+        dmaBuffer[n++] = timingBits[b1 & 0x0F];
+
+        // Blue
+        dmaBuffer[n++] = timingBits[(b2 >> 4) & 0x0F];
+        dmaBuffer[n++] = timingBits[b2 & 0x0F];
+
+    }
+
+    // reset pulse
+    for (int i = 0; i < resetDelay; i++) {
+        dmaBuffer[n++] = 0;
+    }
+
+    esp_err_t error = spi_device_transmit(spiSettings.spi, &(spi_transaction_t) {
+                                                    .length = dmaBufferSize * 8,
+                                                    .tx_buffer = dmaBuffer,
+                                                });
+    return error;
+}
+
+#ifdef __cplusplus
+}
+#endif

src/drivers/wsled.h

@@ -0,0 +1,50 @@
+
+#pragma once
+
+#include "driver/gpio.h"
+#include "driver/spi_master.h"
+#include <stdio.h>
+#include <string.h>
+
+#define WSLED_12_RESET_TIME 30
+#define WSLED_15_RESET_TIME 30
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    uint8_t r;
+    uint8_t g;
+    uint8_t b;
+} CRGB;
+
+typedef enum {
+    WS2812B = 0,
+    WS2815
+} WsledType;
+
+typedef struct {
+    spi_host_device_t host;
+    spi_device_handle_t spi;
+    int dma_chan;
+    spi_device_interface_config_t devcfg;
+    spi_bus_config_t buscfg;
+} spi_settings_t;
+
+typedef struct {
+    gpio_num_t pin;
+    WsledType type;
+    uint32_t numLeds;
+} wsled_t;
+
+esp_err_t wsledInit(wsled_t* dev, CRGB** buffer);
+
+// test function
+esp_err_t wsledFill(CRGB color);
+
+esp_err_t wsledUpdate();
+
+#ifdef __cplusplus
+}
+#endif

src/main.cpp

@@ -14,7 +14,7 @@ void app_main(void) {
     ESP_LOGI(TAG, "Program start");
 
     App app;
-    int8_t status = app.main();
+    int32_t status = app.main();
     ESP_LOGI(TAG, "App main returned status %d", status);
 }
 

src/pins.hpp

@@ -0,0 +1,34 @@
+
+#include "driver/gpio.h"
+
+// onboard led
+const gpio_num_t gpio_onboardLed = GPIO_NUM_2;
+
+// misc
+const gpio_num_t gpio_msdDetect  = GPIO_NUM_8;
+const gpio_num_t gpio_ws2812b    = GPIO_NUM_9;
+
+// i2c
+const gpio_num_t gpio_i2c_dout   = GPIO_NUM_11;
+const gpio_num_t gpio_i2c_din    = GPIO_NUM_12;
+
+// i2c expander interrupts
+const gpio_num_t gpio_i2c_intrA  = GPIO_NUM_14;
+const gpio_num_t gpio_i2c_intrB  = GPIO_NUM_13;
+
+// uart
+const gpio_num_t gpio_uart_rx    = (gpio_num_t)44; // should already be configured
+const gpio_num_t gpio_uart_tx    = (gpio_num_t)43; // should already be configured
+
+// seven segment display
+const gpio_num_t gpio_ssd_latch  = GPIO_NUM_17;
+const gpio_num_t gpio_ssd_clk    = GPIO_NUM_18;
+const gpio_num_t gpio_ssd_data   = GPIO_NUM_21;
+
+// i2s
+const gpio_num_t gpio_i2s_wsel   = GPIO_NUM_38;
+const gpio_num_t gpio_i2s_din    = GPIO_NUM_39;
+const gpio_num_t gpio_i2s_bck    = (gpio_num_t)40; // idk why it only goes up to 40
+const gpio_num_t gpio_i2s_mck    = (gpio_num_t)41;
+const gpio_num_t gpio_i2s_mute   = (gpio_num_t)42;
+const gpio_num_t gpio_i2s_shdn   = (gpio_num_t)45;