Merge pull request #15 from UncleGrumpy/blinky

Various updates and corrections

README.md

@@ -47,7 +47,7 @@ In order to flash and run these programs on an STM32 device, you will need, in a
 
 * An STM32 device with support for USB connectivity via UART, such as the [STMicroelectronics](https://www.st.com) [Nucleo-F429ZI](https://www.st.com/en/evaluation-tools/nucleo-f429zi.html).  (Some STM32 boards require an external adapter for UART connectivity)
 * Installation of the release of the AtomVM virtual machine image on the STM32 device.  For information about how to install a release of the AtomVM virtual machine image on an STM32 device, see the AtomVM [Getting Started Guide](https://doc.atomvm.net/getting-started-guide.html) documentation.
-* A USB cable to connect to UART and.or JTAG. (The [STM32F4Discovery](https://www.st.com/en/evaluation-tools/stm32f4discovery.html) needs two cables -- one for built in JTAG, and one for external UART, where as on the [Nucleo-F429ZI](https://www.st.com/en/evaluation-tools/nucleo-f429zi.html) board both UART and JTAG are presented on the one on-board usb connection).
+* A USB cable to connect to UART and/or JTAG. (The [STM32F4Discovery](https://www.st.com/en/evaluation-tools/stm32f4discovery.html) needs two cables -- one for built in JTAG, and one for external UART, where as on the [Nucleo-F429ZI](https://www.st.com/en/evaluation-tools/nucleo-f429zi.html) board both UART and JTAG are presented on the one on-board usb connection).
 * The [st-flash](https://github.com/texane/stlink) flashing tool.
 * To use JTAG for flashing and console output debugging, you will need a [st-link v2](https://www.st.com/en/development-tools/st-link-v2.html) or [st-link v3](https://www.st.com/en/development-tools/stlink-v3set.html) device (typically already included on Nucleo and Discovery boards).
 * (Recommended) A serial console program, such as [`minicom`](https://en.wikipedia.org/wiki/Minicom).

demos/morse_server/README.md

@@ -35,7 +35,7 @@ Your ESP can be reached with a web browser on port 8080 by its IP address or DHC
 
     "http://192.168.0.32:8080"  or  "http://atomvm-240ac458d278:8080"
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 ## Supported Platforms
 

elixir/Blinky/README.md

@@ -2,14 +2,14 @@
 
 Welcome to the `Blinky` AtomVM application.
 
-The `Blinky` AtomVM application will blink an LED attached to pin 2 on and off once every second.
+The `Blinky` AtomVM application will blink an LED attached to pin 2 (`stm32` pin `{:b, 0}`) on and off once every second.
 
-> Note.  This example program only runs on the `esp32` and `stm32` platforms.
+> Note.  This example program only runs on the `esp32`,`stm32`, and `pico` platforms.
 
-To run this example, connect a 1k ohm resistor in series with a 3.3v LED between IO pin 2 and GND.
+To run this example, depending on how bright you want your led, connect a 220 ohm to 1k ohm resistor in series with a 3.3v LED between IO pin 2 and GND.
 
     +-----------+
-    |           |    1k ohm
+    |           |    330 ohm
     |       IO2 o--- \/\/\/\ ---+
     |           |   resistor    |
     |           |               |
@@ -19,8 +19,12 @@ To run this example, connect a 1k ohm resistor in series with a 3.3v LED between
     +-----------+      LED
         ESP32
 
-> Note.  Many ESP32 development boards already attach pin 2 to an on-board LED.
+> ESP32 Note.  Many ESP32 development boards already attach pin 2 to an on-board LED.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+> STM32 Note. The Nucleo line of boards all have three leds on `{:b, [0, 7, 14]}`.
+
+> Pico-W Note. To use the onboard LED on a `picow` edit lib/Blinky.ex and comment out the current `@pin` definition (change to: `# @pin 2`), and uncomment the definition for the picow onboard LED `@pin` definition: `@pin {:wl, 0}`.
+
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Elixir AtomVM example programs, see the Elixir example program [README](../README.md).

elixir/Blinky/lib/Blinky.ex

@@ -19,11 +19,14 @@
 #
 
 defmodule Blinky do
+  # Pin 2 works on any pico device with an external LED
   @pin 2
+  # Comment out above and uncomment below to use Pico W onboard LED
+  # @pin {:wl, 0}
 
   def start() do
-    GPIO.set_pin_mode(@pin, :output)
-    loop(@pin, :low)
+    platform_gpio_setup()
+    loop(pin(), :low)
   end
 
   defp loop(pin, level) do
@@ -40,4 +43,31 @@ defmodule Blinky do
   defp toggle(:low) do
     :high
   end
+
+  defp pin() do
+    case :atomvm.platform() do
+      :esp32 -> 2
+      :pico -> @pin
+      :stm32 -> {:b, [0]}
+      unsupported -> :erlang.exit({:unsupported_platform, unsupported})
+    end
+  end
+
+  defp platform_gpio_setup() do
+    case :atomvm.platform() do
+      :esp32 -> GPIO.set_pin_mode(pin(), :output)
+      :stm32 -> GPIO.set_pin_mode(pin(), :output)
+      :pico ->
+        case @pin do
+          {:wl, 0} -> :ok
+          pin ->
+            GPIO.init(pin)
+            GPIO.set_pin_mode(pin, :output)
+        end
+      unsupported ->
+        :io.format("Platform ~p is not supported.~n", [unsupported])
+        :erlang.exit({:error, {:unsupported_platform, unsupported}})
+    end
+  end
+
 end

elixir/HelloWorld/README.md

@@ -4,6 +4,6 @@ Welcome to the `HelloWorld` AtomVM application.
 
 The `HelloWorld` AtomVM application prints "Hello World" to the console and then terminates.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Elixir AtomVM example programs, see the Elixir example program [README](../README.md).

elixir/LEDC_Example/README.md

@@ -7,6 +7,6 @@ The `LEDC_Example` AtomVM application illustrates use of the AtomVM `LEDC` inter
 LEDs are wired to GPIO pins 4, 5, 18, and 19 and should use a resistor (minimum 100 Ohm up to 1K, 220 Ohm is a good choice). Change the number
 for the GPIO pins in the example if necessary. See the Blinky example for wiring if you are unsure.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

elixir/README.md

@@ -9,10 +9,12 @@ Some example programs can only run on specific platform.  The following table su
 
 | Example Program | esp32 | stm32 | Pico | Pico W | generic_unix |
 |-----------------|-------|-------|------|--------|--------------|
-| Blinky          | ✅ | ✅ | ❌ | ❌ | ❌ |
+| Blinky          | ✅ | ✅ | ✅ | ✦ | ❌ |
 | HelloWorld      | ✅ | ✅ | ✅ | ✅ | ✅ |
 | LEDC_Example    | ✅ | ❌ | ❌ | ❌ | ❌ |
 
+✦ Works, but requires editing to use onboard LED, see the README in the examples directory.
+
 To build and run an example in this directory, change your working directory to the corresponding example program, and execute the generic instructions below.
 
 > WARNING!  The Elixir examples in this repository are currently under construction.  They may not run or even compile.  Stay tuned for updates!

erlang/README.md

@@ -10,10 +10,10 @@ Some example programs can only run on specific platform.  The following table su
 | Example Program | esp32 | stm32 | Pico | Pico W | generic_unix |
 |-----------------|-------|-------|----------------|------------------|--------------|
 | arepl_example   | ✅ | ❌ | ❌ | ❌ | ✅ |
-| blinky          | ✅ | ❌ | ✅ | ❌ | ❌ |
+| blinky          | ✅ | ✅ | ✅ | ✦ | ❌ |
 | deep_sleep      | ✅ | ❌ | ❌ | ❌ | ❌ |
 | esp_nvs         | ✅ | ❌ | ❌ | ❌ | ❌ |
-| gpio_interrupt  | ✅ | ❌ | ❌ | ❌ | ❌ |
+| gpio_interrupt  | ✅ | ✅ | ❌ | ❌ | ❌ |
 | hello_world     | ✅ | ✅ | ✅ | ✅ | ✅ |
 | http_server_example | ✅ | ❌ | ❌ | ❌ | ✅ |
 | i2c_example     | ✅ | ❌ | ❌ | ❌ | ❌ |
@@ -28,6 +28,8 @@ Some example programs can only run on specific platform.  The following table su
 | udp_server      | ✅ | ❌ | ❌ | ❌ | ✅ |
 | wifi            | ✅ | ❌ | ❌ | ❌ | ❌ |
 
+✦ Works, but requires editing to use onboard LED, see the README in the examples directory.
+
 To build and run an example in this directory, change your working directory to the corresponding example program, and execute the generic instructions below.
 
 ## Generic Instructions

erlang/arepl_example/README.md

@@ -4,7 +4,7 @@ Welcome to the `arepl_example` AtomVM application.
 
 The `arepl_example` AtomVM application demonstrates the use of the `arepl` LISP interpreter.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 ## Build and Run Instructions
 

erlang/blinky/README.md

@@ -2,14 +2,14 @@
 
 Welcome to the `blinky` AtomVM application.
 
-The `blinky` AtomVM application will blink an LED attached to pin 2 on and off once every second.
+The `blinky` AtomVM application will blink an LED attached to pin 2  (`stm32` pin `{b, 0}`) on and off once every second.
 
-> Note.  This example program only runs on the `esp32` and `stm32` platforms.
+> Note.  This example program only runs on the `esp32`, `stm32`, and `pico` platforms.
 
-To run this example, connect a 1k ohm resistor in series with a 3.3v LED between IO pin 2 and GND.
+To run this example, depending on how bright you want your led, connect a 220 ohm to 1k ohm resistor in series with a 3.3v LED between IO pin 2 and GND.
 
     +-----------+
-    |           |    1k ohm
+    |           |    330 ohm
     |       IO2 o--- \/\/\/\ ---+
     |           |   resistor    |
     |           |               |
@@ -19,8 +19,12 @@ To run this example, connect a 1k ohm resistor in series with a 3.3v LED between
     +-----------+      LED
         ESP32
 
-> Note.  Many ESP32 development boards already attach pin 2 to an on-board LED.
+> ESP32 Note.  Many ESP32 development boards already attach pin 2 to an on-board LED.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+> STM32 Note. The Nucleo line of boards all have three LEDs on {b, [0, 7, 14]}.
+
+> Pico W Note. To use the onboard LED on a `picow` edit src/blinky.erl and comment out the current `PIN` definition (change to: `% -define(PIN, 2).`), and uncomment the definition for the `picow` onboard LED definition: `-define(PIN, {wl, 0}).`
+
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/blinky/src/blinky.erl

@@ -21,11 +21,14 @@
 -module(blinky).
 -export([start/0]).
 
+% External LED on pin 2 will work with all pico devices.
 -define(PIN, 2).
+% Comment out above and uncomment the following line to use pico-w onboard LED.
+% -define(PIN, {wl, 0}).
 
 start() ->
-    gpio:set_pin_mode(?PIN, output),
-    loop(?PIN, low).
+    platform_gpio_setup(atomvm:platform()),
+    loop(pin(), low).
 
 loop(Pin, Level) ->
     io:format("Setting pin ~p ~p~n", [Pin, Level]),
@@ -37,3 +40,33 @@ toggle(high) ->
     low;
 toggle(low) ->
     high.
+
+pin() ->
+    case atomvm:platform() of
+        esp32 ->
+            2;
+        pico ->
+            ?PIN;
+        stm32 ->
+            {b, 0};
+        Platform ->
+            erlang:exit({unsupported_platform, Platform})
+    end.
+
+platform_gpio_setup(esp32) ->
+    gpio:set_pin_mode(pin(), output);
+platform_gpio_setup(stm32) ->
+    gpio:set_pin_mode(pin(), output);
+platform_gpio_setup(pico) ->
+    case ?PIN of
+        {wl, 0} ->
+            % Pico-W needs no setup for extra "WL" pins
+            ok;
+        Pin ->
+            % Setup for Pico GPIO pins
+            gpio:init(Pin),
+            gpio:set_pin_mode(Pin, output)
+    end;
+platform_gpio_setup(Platform) ->
+    io:format("Platform ~p is not supported.~n", [Platform]),
+    erlang:exit({error, {unsupported_platform, Platform}}).

erlang/deep_sleep/README.md

@@ -4,6 +4,6 @@ Welcome to the `deep_sleep` AtomVM application.
 
 The `deep_sleep` AtomVM application will put the ESP32 device into low-power deep sleep for 10 seconds, wake up, and report the reset reason.  In most cases this will be `esp_rst_deepsleep`, but the initial reset reason will be `esp_rst_poweron`, or if you reset the device manually during sleep.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/esp_nvs/README.md

@@ -4,6 +4,6 @@ Welcome to the `esp_nvs` AtomVM application.
 
 The `esp_nvs` AtomVM application uses the ESP non-volatile storage to record the number of times the device has restarted.  If the NVS storage has not been set for this application, it will be intialized with a count of 0.  The device will then sleep for 10 seconds, and restart.  After each restart, the number of restarts is incremented and stored in non-volatile storage.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/gpio_interrupt/README.md

@@ -17,6 +17,6 @@ This application will wait in a loop for interrupt signals when GPIO pin 2 is ri
     Waiting for interrupt ... Interrupt on pin 2
     Waiting for interrupt ...
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/gpio_interrupt/src/gpio_interrupt.erl

@@ -22,66 +22,12 @@
 
 -export([start/0]).
 
-% -define(OUTPUT_PIN, 2).
-% -define(INPUT_PIN, 22).
-
-% start() ->
-%     case verify_platform(atomvm:platform()) of
-%         ok ->
-
-%             gpio:set_pin_mode(?INPUT_PIN, input),
-%             gpio:set_pin_pull(?INPUT_PIN, down),
-%             GPIO = gpio:start(),
-%             gpio:set_int(GPIO, ?INPUT_PIN, rising),
-%             spawn(fun receive_interrupt/0),
-
-%             gpio:set_pin_mode(?OUTPUT_PIN, output),
-%             loop(?OUTPUT_PIN, low);
-%         Error ->
-%             Error
-%     end.
-
-% loop(Pin, Level) ->
-%     io:format("Setting pin ~p ~p~n", [Pin, Level]),
-%     gpio:digital_write(Pin, Level),
-%     timer:sleep(1000),
-%     loop(
-%         Pin,
-%         case Level of
-%             low -> high;
-%             high -> low
-%         end
-%     ).
-
-% receive_interrupt() ->
-%     io:format("Waiting for interrupt ... "),
-%     receive
-%         {gpio_interrupt, Pin} ->
-%             io:format("Interrupt on pin ~p~n", [Pin]);
-%         X -> erlang:display(X)
-%     end,
-%     receive_interrupt().
-
-% verify_platform(esp32) ->
-%     ok;
-% verify_platform(stm32) ->
-%     ok;
-% verify_platform(Platform) ->
-%     {error, {unsupported_platform, Platform}}.
-
--define(PIN, 2).
-
 start() ->
-    case verify_platform(atomvm:platform()) of
-        ok ->
-            gpio:set_pin_mode(?PIN, input),
-            gpio:set_pin_pull(?PIN, down),
-            GPIO = gpio:start(),
-            gpio:set_int(GPIO, ?PIN, rising),
-            loop();
-        Error ->
-            Error
-    end.
+    io:format("Testing gpio interrupt on pin ~p.~n", pin()),
+    GPIO = gpio:start(),
+    gpio:set_pin_mode(pin(), input),
+    gpio:set_int(GPIO, pin(), rising),
+    loop().
 
 loop() ->
     io:format("Waiting for interrupt ... "),
@@ -91,9 +37,12 @@ loop() ->
     end,
     loop().
 
-verify_platform(esp32) ->
-    ok;
-verify_platform(stm32) ->
-    ok;
-verify_platform(Platform) ->
-    {error, {unsupported_platform, Platform}}.
+pin() ->
+    case atomvm:platform() of
+        esp32 ->
+            0;
+        stm32 ->
+            {c, 13};
+        Platform ->
+            erlang:exit({unsupported_platform, Platform})
+    end.

erlang/hello_world/README.md

@@ -4,6 +4,6 @@ Welcome to the `hello_world` AtomVM application.
 
 The `hello_world` AtomVM application prints "Hello World" to the console and then terminates.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/i2c_example/README.md

@@ -4,6 +4,6 @@ Welcome to the `i2c_example` AtomVM application.
 
 The `i2c_example` AtomVM application demonstrates use of the `i2c` interface using the popular SHT3x temperature sensor.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/ledc_example/README.md

@@ -4,6 +4,6 @@ Welcome to the `ledc_example` AtomVM application.
 
 The `ledc_example` AtomVM application illustrates use of the AtomVM `ledc` interface.
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).

erlang/read_priv/README.md

@@ -8,6 +8,6 @@ For this test, note the presence of the `favicon-32x32.png` in the `priv` direct
 
     <<-119,80,78,71,13,10,26,10,0,0,0,...>>
 
-For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://doc.atomvm.net/programmers-guide.html).
+For more information about programming on the AtomVM platform, see the [AtomVM Programmers Guide](https://www.atomvm.net/doc/master/programmers-guide.html).
 
 For general information about building and executing Erlang AtomVM example programs, see the Erlang example program [README](../README.md).