Add missing files for N64 support

Author: JonnyHaystack

HAL/pico/include/comms/N64Backend.hpp

@@ -0,0 +1,29 @@
+#ifndef _COMMS_N64BACKEND_HPP
+#define _COMMS_N64BACKEND_HPP
+
+#include "core/CommunicationBackend.hpp"
+#include "core/state.hpp"
+
+#include <N64Console.hpp>
+#include <hardware/pio.h>
+
+class N64Backend : public CommunicationBackend {
+  public:
+    N64Backend(
+        InputSource **input_sources,
+        size_t input_source_count,
+        uint data_pin,
+        PIO pio = pio0,
+        int sm = -1,
+        int offset = -1
+    );
+    ~N64Backend();
+    void SendReport();
+    int GetOffset();
+
+  private:
+    N64Console *_n64;
+    n64_report_t _report;
+};
+
+#endif

HAL/pico/src/comms/N64Backend.cpp

@@ -0,0 +1,66 @@
+#include "comms/N64Backend.hpp"
+
+#include "core/InputSource.hpp"
+
+#include <N64Console.hpp>
+#include <hardware/pio.h>
+
+N64Backend::N64Backend(
+    InputSource **input_sources,
+    size_t input_source_count,
+    uint data_pin,
+    PIO pio,
+    int sm,
+    int offset
+)
+    : CommunicationBackend(input_sources, input_source_count) {
+    _n64 = new N64Console(data_pin, pio, sm, offset);
+    _report = default_n64_report;
+}
+
+N64Backend::~N64Backend() {
+    delete _n64;
+}
+
+void N64Backend::SendReport() {
+    // Update slower inputs before we start waiting for poll.
+    ScanInputs(InputScanSpeed::SLOW);
+    ScanInputs(InputScanSpeed::MEDIUM);
+
+    // Read inputs
+    _n64->WaitForPoll();
+
+    // Update fast inputs in response to poll.
+    ScanInputs(InputScanSpeed::FAST);
+
+    // Run gamemode logic.
+    UpdateOutputs();
+
+    // Digital outputs
+    _report.a = _outputs.a;
+    _report.b = _outputs.b;
+    _report.z = _outputs.buttonR;
+    _report.l = _outputs.triggerLDigital;
+    _report.r = _outputs.triggerRDigital;
+    _report.start = _outputs.start;
+    _report.dpad_left = _outputs.dpadLeft;
+    _report.dpad_right = _outputs.dpadRight;
+    _report.dpad_down = _outputs.dpadDown;
+    _report.dpad_up = _outputs.dpadUp;
+    // Somewhat ugly way of mapping right stick to C-Pad
+    _report.c_left = _outputs.rightStickX < 128;
+    _report.c_right = _outputs.rightStickX > 128;
+    _report.c_down = _outputs.rightStickY < 128;
+    _report.c_up = _outputs.rightStickY > 128;
+
+    // Analog outputs
+    _report.stick_x = _outputs.leftStickX - 128;
+    _report.stick_y = _outputs.leftStickY - 128;
+
+    // Send outputs to console.
+    _n64->SendReport(&_report);
+}
+
+int N64Backend::GetOffset() {
+    return _n64->GetOffset();
+}