From eb24b85b6a5719774d739f30e8ef85dfc90c97d4 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Fri, 17 May 2013 22:36:23 +0200
Subject: Enumerate as USB gamepad and report dummy values.
---
.gdbinit | 23 +++++++++++
.gitignore | 5 +++
.gitmodules | 3 ++
SConstruct | 11 ++++++
laks | 1 +
main.cpp | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 172 insertions(+)
create mode 100644 .gdbinit
create mode 100644 .gitignore
create mode 100644 .gitmodules
create mode 100644 SConstruct
create mode 160000 laks
create mode 100644 main.cpp
diff --git a/.gdbinit b/.gdbinit
new file mode 100644
index 0000000..2844d70
--- /dev/null
+++ b/.gdbinit
@@ -0,0 +1,23 @@
+define flash
+file demo.elf
+load
+end
+
+define restart
+run
+end
+
+define attach_swd
+mon swdp_scan
+attach 1
+end
+
+define attach_jtag
+mon jtag_scan
+attach 1
+end
+
+file demo.elf
+target extended-remote /dev/cu.usbmodem7FC181B1
+
+set mem inaccessible-by-default off
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b137a4a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*.o
+*.a
+*.elf
+*.swp
+.sconsign.dblite
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..cd4f3c2
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "laks"]
+ path = laks
+ url = git://git.jvnv.net/laks.git
diff --git a/SConstruct b/SConstruct
new file mode 100644
index 0000000..ef5b6f5
--- /dev/null
+++ b/SConstruct
@@ -0,0 +1,11 @@
+import os
+
+env = Environment(
+ ENV = os.environ,
+)
+
+SConscript('laks/build_rules')
+
+env.SelectMCU('stm32f373cc')
+
+env.Firmware('demo.elf', Glob('*.cpp'))
diff --git a/laks b/laks
new file mode 160000
index 0000000..4100075
--- /dev/null
+++ b/laks
@@ -0,0 +1 @@
+Subproject commit 410007558fa8d314e3f2fdfb385d2d8ab07e1e6c
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..de86129
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,129 @@
+#include <rcc/rcc.h>
+#include <gpio/pin.h>
+#include <os/time.h>
+#include <usb/usb.h>
+#include <usb/descriptor.h>
+
+template <uint32_t S>
+struct raw_t {
+ uint8_t a[S];
+} __attribute__((packed));
+
+uint8_t report_desc[] = {
+ 0x05, 0x01, // Usage page: Generic Desktop
+ 0x09, 0x05, // Usage: Gamepad
+ 0xa1, 0x01, // Collection: Application
+ 0xa1, 0x00, // Collection: Physical
+ 0x05, 0x09, // Usage page: Button
+ 0x19, 0x01, // Usage minimum: Button 1
+ 0x29, 0x20, // Usage maximum: Button 32
+ 0x15, 0x00, // Logical minimum: 0
+ 0x25, 0x01, // Logical maximum: 1
+ 0x95, 0x20, // Report count: 32
+ 0x75, 0x01, // Report size: 1
+ 0x81, 0x02, // Input (data, var, abs)
+ 0xc0, // End collection
+ 0xc0, // End collection
+};
+
+raw_t<9> hid_desc = {{0x09, 0x21, 0x11, 0x01, 0x00, 0x01, 0x22, sizeof(report_desc), 0x00}};
+
+auto dev_desc = device_desc(0x200, 0, 0, 0, 64, 0x1234, 0x5678, 0, 0, 0, 0, 1);
+auto conf_desc = configuration_desc(1, 1, 0, 0xc0, 0,
+ // HID interface.
+ interface_desc(0, 0, 1, 0x03, 0x00, 0x00, 0,
+ hid_desc,
+ endpoint_desc(0x81, 0x03, 16, 1)
+ )
+);
+
+desc_t dev_desc_p = {sizeof(dev_desc), (void*)&dev_desc};
+desc_t conf_desc_p = {sizeof(conf_desc), (void*)&conf_desc};
+
+Pin& usb_dm = PA11;
+Pin& usb_dp = PA12;
+Pin usb_disc = {GPIOF, 6};
+
+USB_f1 usb(USB, dev_desc_p, conf_desc_p);
+
+class USB_HID : public USB_class_driver {
+ private:
+ USB_generic& usb;
+
+ uint32_t buf[16];
+
+ public:
+ USB_HID(USB_generic& usbd) : usb(usbd) {
+ usb.register_driver(this);
+ }
+
+ protected:
+ virtual SetupStatus handle_setup(uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, uint16_t wLength) {
+ // Get report descriptor.
+ if(bmRequestType == 0x81 && bRequest == 0x06 && wValue == 0x2200) {
+ usb.write(0, (uint32_t*)report_desc, sizeof(report_desc) < wLength ? sizeof(report_desc) : wLength);
+ return SetupStatus::Ok;
+ }
+
+ return SetupStatus::Unhandled;
+ }
+
+ virtual void handle_set_configuration(uint8_t configuration) {
+ if(configuration) {
+ //usb.register_out_handler(this, 1);
+ usb.hw_conf_ep(0x81, EPType::Interrupt, 16);
+ }
+ }
+
+ virtual void handle_out(uint8_t ep, uint32_t len) {
+ if(ep == 0) {
+ usb.write(0, nullptr, 0);
+ }
+ }
+};
+
+USB_HID usb_hid(usb);
+
+uint32_t buttons;
+
+int main() {
+ // Initialize system timer.
+ STK.LOAD = 72000000 / 8 / 1000; // 1000 Hz.
+ STK.CTRL = 0x03;
+
+ RCC.enable(RCC.GPIOA);
+
+ usb_disc.set_mode(Pin::Output);
+ usb_disc.on();
+
+ usb_dm.set_mode(Pin::AF);
+ usb_dm.set_af(14);
+ usb_dp.set_mode(Pin::AF);
+ usb_dp.set_af(14);
+
+ RCC.enable(RCC.USB);
+
+ usb.init();
+
+ Time::sleep(100);
+ usb_disc.off();
+
+ uint32_t last_time = 0;
+
+ while(1) {
+ usb.process();
+
+ int32_t time_delta = Time::time() - last_time;
+
+ if(time_delta >= 500) {
+ if(!(buttons <<= 1)) {
+ buttons = 1;
+ }
+ last_time += time_delta;
+ }
+
+ if(usb.ep_ready(1)) {
+ usb.write(1, &buttons, sizeof(buttons));
+ }
+ }
+}
--
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