First commit.

Very basic, "Hello, World" infrastructure. For the most part, I did not
copy this from an existing example, rather, took inspiration from an
existing example. I want to avoid cargo-culting as much as possible.

4 files changed, 47 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
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--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(ws2812b)
diff --git a/README.md b/README.md
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index 0000000..28f9dfc
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+++ b/README.md
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+# Hacking on an Espressif ESP32.
+
+The goal of this project is to get some workable Christmas lights using a spool
+of ws2812b LED strip lights. I've done this before, bare metal, on an stm32
+(see git.josher.dev:stm32.git). I expect this to be not _too_ difficult
+considering I have done it before on bare metal.
+
+A stretch goal is to make these controllable over the network, and since the
+esp32 comes with wireless already on the board, this should not be too
+difficult.
+
+Unfortunately, I am not a huge fan of the Espressif idf infrastructure. It seems
+_very_ bloated. Plus it uses CMake, which I don't have anything against, I just
+don't know it very well. Hopefully I'll learn it better!
+
+# Building and Flashing
+
+To build, first you have to install the esp32-idf (ugh, I know right, bunch of
+bloat. Maybe sometime soon I'll start bare-metal hacking on it.)
+
+Once you've followed the instructions there, it's time to build.
+
+```bash
+idf.py build
+```
+
+```bash
+idf.py -p /dev/ttyUSB0 flash
+```
diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
new file mode 100644
index 0000000..cd28b28
--- /dev/null
+++ b/main/CMakeLists.txt
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+idf_component_register(SRCS "main.c"
+  INCLUDE_DIRS "")
diff --git a/main/main.c b/main/main.c
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index 0000000..9c53c3f
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+++ b/main/main.c
@@ -0,0 +1,10 @@
+#include "sdkconfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_system.h"
+#include "esp_spi_flash.h"
+
+void app_main(void)
+{
+  printf("Hello, World!\n");
+}