Sidewinder Gamepad support

CMakeLists.txt

@@ -121,6 +121,7 @@ src/addons/playernum.cpp
 src/addons/playerleds.cpp
 src/addons/ps4mode.cpp
 src/addons/reverse.cpp
+src/addons/sidewindergp.cpp
 src/addons/turbo.cpp
 src/addons/slider_socd.cpp
 src/addons/wiiext.cpp

docs/web-configurator.md

@@ -287,6 +287,37 @@ Classic Controller support includes Classic, Classic Pro, and NES/SNES Mini Cont
 
 Original Classic Controller L & R triggers are analog sensitive, where Pro triggers are not.
 
+### Sidewinder Gamepad
+
+![GP2040 Configurator - Sidewinder Gamepad](assets/images/gpc-add-ons-sidewindergp.png)
+
+Designed to be mapped on DA-15 gameport of the Sidewinder Gamepad.
+
+Connections:
+
+ - DA-15 pins 1, 8, 9, 15 to +5V
+ - DA-15 pins 4, 5, 12 to GND
+ - DA-15 pin 2 to Clock pin
+ - DA-15 pin 3 to Trigger pin
+ - DA-15 pin 7 to Data pin
+
+Mapping is a follows:
+
+| Sidewinder GP | GP2040-CE | 
+|---------------|-----------|
+| D-Pad         | Analog    | 
+| A             | B1        | 
+| B             | B2        | 
+| C             | L3        | 
+| X             | B3        | 
+| Y             | B4        | 
+| Z             | R3        | 
+| LT            | L1        | 
+| RT            | R1        | 
+| Start         | S2        | 
+| M             | S1        | 
+
+
 ## Data Backup and Restoration
 
 ![GP2040-CE Configurator - Add-Ons Backup and Restore](assets/images/gpc-backup-and-restore.png)

headers/addons/sidewindergp.h

@@ -0,0 +1,43 @@
+#ifndef _SidewinderGP_H
+#define _SidewinderGP_H
+
+#include "gpaddon.h"
+
+#include "GamepadEnums.h"
+
+#include "BoardConfig.h"
+
+#ifndef SIDEWINDERGP_INPUT_ENABLED
+#define SIDEWINDERGP_INPUT_ENABLED 0
+#endif
+
+#ifndef SIDEWINDERGP_PIN_TRIGGER
+#define SIDEWINDERGP_PIN_TRIGGER    -1
+#endif
+
+#ifndef SIDEWINDERGP_PIN_CLOCK
+#define SIDEWINDERGP_PIN_CLOCK    -1
+#endif
+
+#ifndef SIDEWINDERGP_PIN_DATA
+#define SIDEWINDERGP_PIN_DATA    -1
+#endif
+
+
+// SidewinderGP Module Name
+#define SideWinderGPName "Sidewinder Gamepad"
+
+class SidewinderGPInput : public GPAddon {
+public:
+	virtual bool available();
+	virtual void setup();       // Setup
+	virtual void process();     // Process
+	virtual void preprocess() {}
+    virtual std::string name() { return SideWinderGPName; }
+private:
+	uint8_t sidewinderGPPinTrigger;
+	uint8_t sidewinderGPPinClock;
+	uint8_t sidewinderGPPinData;
+};
+
+#endif  // _SidewinderGP_H_

headers/configs/base64.h

@@ -26,6 +26,7 @@
  */
 
 #include <string>
+#include <stdint.h>
 
 class Base64 {
  public:

headers/storagemanager.h

@@ -144,6 +144,9 @@ struct AddonOptions {
 	uint8_t wiiExtensionSCLPin;
 	int wiiExtensionBlock;
 	uint32_t wiiExtensionSpeed;
+	uint8_t sidewinderGPPinTrigger;
+	uint8_t sidewinderGPPinClock;
+	uint8_t sidewinderGPPinData;
 	uint8_t AnalogInputEnabled;
 	uint8_t BoardLedAddonEnabled;
 	uint8_t BootselButtonAddonEnabled;
@@ -161,6 +164,7 @@ struct AddonOptions {
 	uint8_t TurboInputEnabled;
 	uint8_t SliderSOCDInputEnabled;
 	uint8_t WiiExtensionAddonEnabled;
+	uint8_t SidewinderGPEnabled;
 	uint32_t checksum;
 };
 

src/addons/sidewindergp.cpp

@@ -0,0 +1,97 @@
+#include "addons/sidewindergp.h"
+#include "storagemanager.h"
+
+
+uint32_t SidewinderGPInputMapping[14] = {
+    GAMEPAD_MASK_DU,
+    GAMEPAD_MASK_DD,
+    GAMEPAD_MASK_DR,
+    GAMEPAD_MASK_DL,
+    GAMEPAD_MASK_B1,
+    GAMEPAD_MASK_B2,
+    GAMEPAD_MASK_L3,
+    GAMEPAD_MASK_B3,
+    GAMEPAD_MASK_B4,
+    GAMEPAD_MASK_R3,
+    GAMEPAD_MASK_L1,
+    GAMEPAD_MASK_R1,
+    GAMEPAD_MASK_S2,
+    GAMEPAD_MASK_S1
+};
+
+bool SidewinderGPInput::available() {
+    const AddonOptions& options = Storage::getInstance().getAddonOptions();
+	sidewinderGPPinTrigger = Storage::getInstance().getAddonOptions().sidewinderGPPinTrigger;
+	sidewinderGPPinClock = Storage::getInstance().getAddonOptions().sidewinderGPPinClock;
+	sidewinderGPPinData = Storage::getInstance().getAddonOptions().sidewinderGPPinData;
+    return options.SidewinderGPEnabled;
+}
+
+void SidewinderGPInput::setup() {
+    gpio_init(sidewinderGPPinTrigger);
+    gpio_set_dir(sidewinderGPPinTrigger, GPIO_OUT);
+    gpio_put(sidewinderGPPinTrigger, 1);
+
+    gpio_init(sidewinderGPPinClock);
+    gpio_set_dir(sidewinderGPPinClock, GPIO_IN);
+    gpio_pull_up(sidewinderGPPinClock);
+
+    gpio_init(sidewinderGPPinData);
+    gpio_set_dir(sidewinderGPPinData, GPIO_IN);
+    gpio_pull_up(sidewinderGPPinData);
+}
+
+void SidewinderGPInput::process()
+{
+    Gamepad * gamepad = Storage::getInstance().GetGamepad();
+
+    gpio_put(sidewinderGPPinTrigger, 0);
+    sleep_us(225);
+    gpio_put(sidewinderGPPinTrigger, 1);
+
+    bool btns[14] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+    bool checksum = 0;
+    bool ok = 0;
+
+    for (int i=0; i < 15; i++) {
+        // Wait for clock falling edge
+        uint16_t timeout = 10000;
+        while (timeout-- && !gpio_get(sidewinderGPPinClock)) {}
+        while (timeout-- && gpio_get(sidewinderGPPinClock)) {}
+        if (!timeout)
+            break;
+        if (i < 14) {
+            btns[i] = !gpio_get(sidewinderGPPinData);
+            checksum ^= btns[i];
+        } else {
+            ok = (checksum == gpio_get(sidewinderGPPinData));
+        }
+    }
+    if (!ok)
+        return;
+
+    gamepad->state.lx = 0x8000;
+    gamepad->state.ly = 0x8000;
+    for (int i=0; i < 14; i++) {
+        if (!btns[i])
+            continue;
+        uint32_t btnMap = SidewinderGPInputMapping[i];
+        if (btnMap > (GAMEPAD_MASK_A2)) {
+            switch (btnMap) {
+                case (GAMEPAD_MASK_DU):
+                    gamepad->state.ly = 0x0;
+                    break;
+                case (GAMEPAD_MASK_DD):
+                    gamepad->state.ly = 0xffff;
+                    break;
+                case (GAMEPAD_MASK_DL):
+                    gamepad->state.lx = 0x0;
+                    break;
+                case (GAMEPAD_MASK_DR):
+                    gamepad->state.lx = 0xffff;
+                    break;
+            }
+        }
+        else gamepad->state.buttons |= btnMap;
+    }
+}

src/configs/webconfig.cpp

@@ -826,6 +826,9 @@ std::string setAddonOptions()
 	docToPin(addonOptions.wiiExtensionSDAPin, doc, "wiiExtensionSDAPin");
 	docToPin(addonOptions.wiiExtensionSCLPin, doc, "wiiExtensionSCLPin");
 	docToValue(addonOptions.wiiExtensionBlock, doc, "wiiExtensionBlock");
+	docToPin(addonOptions.sidewinderGPPinTrigger, doc, "sidewinderGPPinTrigger");
+	docToPin(addonOptions.sidewinderGPPinClock, doc, "sidewinderGPPinClock");
+	docToPin(addonOptions.sidewinderGPPinData, doc, "sidewinderGPPinData");
 	docToValue(addonOptions.wiiExtensionSpeed, doc, "wiiExtensionSpeed");
 	docToValue(addonOptions.AnalogInputEnabled, doc, "AnalogInputEnabled");
 	docToValue(addonOptions.BoardLedAddonEnabled, doc, "BoardLedAddonEnabled");
@@ -841,6 +844,7 @@ std::string setAddonOptions()
 	docToValue(addonOptions.ReverseInputEnabled, doc, "ReverseInputEnabled");
 	docToValue(addonOptions.TurboInputEnabled, doc, "TurboInputEnabled");
 	docToValue(addonOptions.WiiExtensionAddonEnabled, doc, "WiiExtensionAddonEnabled");
+	docToValue(addonOptions.SidewinderGPEnabled, doc, "SidewinderGPEnabled");
 
 	Storage::getInstance().setAddonOptions(addonOptions);
 
@@ -1002,6 +1006,9 @@ std::string getAddonOptions()
 	writeDoc(doc, "wiiExtensionSCLPin", addonOptions.wiiExtensionSCLPin == 0xFF ? -1 : addonOptions.wiiExtensionSCLPin);
 	writeDoc(doc, "wiiExtensionBlock", addonOptions.wiiExtensionBlock);
 	writeDoc(doc, "wiiExtensionSpeed", addonOptions.wiiExtensionSpeed);
+	writeDoc(doc, "sidewinderGPPinTrigger", addonOptions.sidewinderGPPinTrigger == 0xFF ? -1 : addonOptions.sidewinderGPPinTrigger);
+	writeDoc(doc, "sidewinderGPPinClock", addonOptions.sidewinderGPPinClock == 0xFF ? -1 : addonOptions.sidewinderGPPinClock);
+	writeDoc(doc, "sidewinderGPPinData", addonOptions.sidewinderGPPinData == 0xFF ? -1 : addonOptions.sidewinderGPPinData);
 	writeDoc(doc, "AnalogInputEnabled", addonOptions.AnalogInputEnabled);
 	writeDoc(doc, "BoardLedAddonEnabled", addonOptions.BoardLedAddonEnabled);
 	writeDoc(doc, "BuzzerSpeakerAddonEnabled", addonOptions.BuzzerSpeakerAddonEnabled);
@@ -1016,6 +1023,7 @@ std::string getAddonOptions()
 	writeDoc(doc, "ReverseInputEnabled", addonOptions.ReverseInputEnabled);
 	writeDoc(doc, "TurboInputEnabled", addonOptions.TurboInputEnabled);
 	writeDoc(doc, "WiiExtensionAddonEnabled", addonOptions.WiiExtensionAddonEnabled);
+	writeDoc(doc, "SidewinderGPEnabled", addonOptions.SidewinderGPEnabled);
 
 	return serialize_json(doc);
 }

src/gp2040.cpp

@@ -18,6 +18,7 @@
 #include "addons/turbo.h"
 #include "addons/slider_socd.h"
 #include "addons/wiiext.h"
+#include "addons/sidewindergp.h"
 
 // Pico includes
 #include "pico/bootrom.h"
@@ -108,6 +109,7 @@ void GP2040::setup() {
 	addons.LoadAddon(new WiiExtensionInput(), CORE0_INPUT);
 	addons.LoadAddon(new PlayerNumAddon(), CORE0_USBREPORT);
 	addons.LoadAddon(new SliderSOCDInput(), CORE0_INPUT);
+	addons.LoadAddon(new SidewinderGPInput(), CORE0_INPUT);
 }
 
 void GP2040::run() {

src/storagemanager.cpp

@@ -29,6 +29,7 @@
 #include "addons/pleds.h"
 #include "addons/reverse.h"
 #include "addons/turbo.h"
+#include "addons/sidewindergp.h"
 #include "addons/slider_socd.h"
 #include "addons/wiiext.h"
 
@@ -200,6 +201,9 @@ void Storage::setDefaultAddonOptions()
 	addonOptions.wiiExtensionSCLPin    = WII_EXTENSION_I2C_SCL_PIN;
 	addonOptions.wiiExtensionBlock     = (WII_EXTENSION_I2C_BLOCK == i2c0) ? 0 : 1;
 	addonOptions.wiiExtensionSpeed     = WII_EXTENSION_I2C_SPEED;
+	addonOptions.sidewinderGPPinTrigger = SIDEWINDERGP_PIN_TRIGGER;
+	addonOptions.sidewinderGPPinClock = SIDEWINDERGP_PIN_CLOCK;
+	addonOptions.sidewinderGPPinData = SIDEWINDERGP_PIN_DATA;
 	addonOptions.AnalogInputEnabled     = ANALOG_INPUT_ENABLED;
 	addonOptions.BoardLedAddonEnabled   = BOARD_LED_ENABLED;
 	addonOptions.BootselButtonAddonEnabled = BOOTSEL_BUTTON_ENABLED;
@@ -214,6 +218,7 @@ void Storage::setDefaultAddonOptions()
 	addonOptions.ReverseInputEnabled    = REVERSE_ENABLED;
 	addonOptions.TurboInputEnabled      = TURBO_ENABLED;
 	addonOptions.WiiExtensionAddonEnabled      = WII_EXTENSION_ENABLED;
+	addonOptions.SidewinderGPEnabled    = SIDEWINDERGP_INPUT_ENABLED;
 	setAddonOptions(addonOptions);
 }
 

www/server/app.js

@@ -223,6 +223,9 @@ app.get("/api/getAddonsOptions", (req, res) => {
 		wiiExtensionSCLPin: -1,
 		wiiExtensionBlock: 0,
 		wiiExtensionSpeed: 400000,
+		sidewinderGPPinTrigger: -1,
+		sidewinderGPPinClock: -1,
+		sidewinderGPPinData: -1,
 		AnalogInputEnabled: 1,
 		BoardLedAddonEnabled: 1,
 		BuzzerSpeakerAddonEnabled: 1,
@@ -237,6 +240,7 @@ app.get("/api/getAddonsOptions", (req, res) => {
 		SliderSOCDInputEnabled: 1,
 		TurboInputEnabled: 1,
 		WiiExtensionAddonEnabled: 1,
+		SidewinderGPEnabled: 1,
 		usedPins: Object.values(picoController),
 	});
 });