Add GPIO objects (#30)

* Add a GPIO interface
* Update Changelog to v10: GPIO messages

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

4 files changed, 73 insertions, 0 deletions

diff --git a/Changelog b/Changelog
index d2d30ab..037dc96 100644
--- a/Changelog
+++ b/Changelog
@@ -1,5 +1,9 @@
 # Changelog
 
+## [0.10]
+### Added
+- GPIO message: SetPinMode, SetInputPull, GetPinMode, GetPinModeResponse, ReadPin, ReadPinResponse, WritePin
+
 ## [0.9]
 ### Added
 - System message: UpdateResponse, enum UpdateResultCode: new entries 
diff --git a/flipper.proto b/flipper.proto
index 10fdac0..9e1be6f 100644
--- a/flipper.proto
+++ b/flipper.proto
@@ -3,6 +3,7 @@ import "storage.proto";
 import "system.proto";
 import "application.proto";
 import "gui.proto";
+import "gpio.proto";
 
 package PB;
 option java_package = "com.flipperdevices.protobuf";
@@ -39,6 +40,10 @@ enum CommandStatus {
     /**< Virtual Display Errors */
     ERROR_VIRTUAL_DISPLAY_ALREADY_STARTED = 19; /**< Virtual Display session can't be started twice */
     ERROR_VIRTUAL_DISPLAY_NOT_STARTED = 20; /**< Virtual Display session can't be stopped when it's not started */
+
+    /**< GPIO Errors */
+    ERROR_GPIO_MODE_INCORRECT = 58;
+    ERROR_GPIO_UNKNOWN_PIN_MODE = 59;
 }
 
 /* There are Server commands (e.g. Storage_write), which have no body message
@@ -103,6 +108,13 @@ message Main {
         .PB_Gui.SendInputEventRequest gui_send_input_event_request = 23;
         .PB_Gui.StartVirtualDisplayRequest gui_start_virtual_display_request = 26;
         .PB_Gui.StopVirtualDisplayRequest gui_stop_virtual_display_request = 27;
+        .PB_Gpio.SetPinMode gpio_set_pin_mode = 50;
+        .PB_Gpio.SetInputPull gpio_set_input_pull = 51;
+        .PB_Gpio.GetPinMode gpio_get_pin_mode = 52;
+        .PB_Gpio.GetPinModeResponse gpio_get_pin_mode_response = 53;
+        .PB_Gpio.ReadPin gpio_read_pin = 54;
+        .PB_Gpio.ReadPinResponse gpio_read_pin_response = 55;
+        .PB_Gpio.WritePin gpio_write_pin = 56;
     }
 }
 
diff --git a/gpio.options b/gpio.options
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/gpio.options
diff --git a/gpio.proto b/gpio.proto
new file mode 100644
index 0000000..446ae14
--- /dev/null
+++ b/gpio.proto
@@ -0,0 +1,57 @@
+syntax = "proto3";
+
+package PB_Gpio;
+option java_package = "com.flipperdevices.protobuf.gpio";
+
+enum GpioPin {
+    PC0 = 0;
+    PC1 = 1;
+    PC3 = 2;
+    PB2 = 3;
+    PB3 = 4;
+    PA4 = 5;
+    PA6 = 6;
+    PA7 = 7;
+};
+
+enum GpioPinMode {
+    OUTPUT = 0;
+    INPUT = 1;
+};
+
+enum GpioInputPull {
+    NO = 0;
+    UP = 1;
+    DOWN = 2;
+};
+
+message SetPinMode {
+    GpioPin pin = 1;
+    GpioPinMode mode = 2;
+}
+
+message SetInputPull {
+    GpioPin pin = 1;
+    GpioInputPull pull_mode = 2;
+}
+
+message GetPinMode {
+    GpioPin pin = 1;
+}
+
+message GetPinModeResponse {
+    GpioPinMode mode = 1;
+}
+
+message ReadPin {
+    GpioPin pin = 1;
+}
+
+message ReadPinResponse {
+    uint32 value = 2;
+}
+
+message WritePin {
+    GpioPin pin = 1;
+    uint32 value = 2;
+}