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Firmware for Popn Pico now has a separate repository, go check it out.
https://github.com/whowechina/popn_pico_firmware

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GNU GENERAL PUBLIC LICENSE
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if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

73
FIRMWARE/pico_sdk_import.cmake
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@ -1,73 +0,0 @@
# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif ()
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT)
include(FetchContent)
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
if (PICO_SDK_FETCH_FROM_GIT_PATH)
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
endif ()
# GIT_SUBMODULES_RECURSE was added in 3.17
if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
GIT_SUBMODULES_RECURSE FALSE
)
else ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
)
endif ()
if (NOT pico_sdk)
message("Downloading Raspberry Pi Pico SDK")
FetchContent_Populate(pico_sdk)
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
endif ()
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
else ()
message(FATAL_ERROR
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
)
endif ()
endif ()
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
if (NOT EXISTS ${PICO_SDK_PATH})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
endif ()
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
endif ()
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
include(${PICO_SDK_INIT_CMAKE_FILE})

10
FIRMWARE/src/CMakeLists.txt
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@ -1,10 +0,0 @@
add_executable(${PROJECT_NAME} main.c buttons.c rgb.c usb_descriptors.c)
pico_generate_pio_header(${PROJECT_NAME} ${CMAKE_CURRENT_LIST_DIR}/ws2812.pio)
target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Werror -Wfatal-errors -O3)
target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_LIST_DIR})
target_link_libraries(${PROJECT_NAME} PRIVATE
pico_multicore pico_stdlib hardware_pio tinyusb_device tinyusb_board)
# Make a UF2 binary
pico_add_extra_outputs(${PROJECT_NAME})

143
FIRMWARE/src/buttons.c
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/*
* Pico Popn Controller Buttons
* WHowe <github.com/whowechina>
*
* A button consists of a switch and an LED
*/
#include "buttons.h"
#include <stdint.h>
#include <stdbool.h>
#include "hardware/gpio.h"
#include "hardware/timer.h"
#include "rgb.h"
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
static const struct button {
int8_t sw_gpio;
int8_t led_gpio; /* led related to the button */
} BUTTON_DEFS[] = {
{0, 1},
{2, 3},
{4, 5},
{6, 7},
{8, 9},
{10, 11},
{12, 13},
{14, 15},
{16, 17},
{26, -1},
{27, 25}
};
#define BUTTON_NUM (ARRAY_SIZE(BUTTON_DEFS))
static bool sw_val[BUTTON_NUM]; /* true for pressed */
static uint64_t sw_freeze_time[BUTTON_NUM];
void button_init()
{
for (int i = 0; i < BUTTON_NUM; i++)
{
sw_val[i] = false;
sw_freeze_time[i] = 0;
gpio_init(BUTTON_DEFS[i].sw_gpio);
gpio_set_function(BUTTON_DEFS[i].sw_gpio, GPIO_FUNC_SIO);
gpio_set_dir(BUTTON_DEFS[i].sw_gpio, GPIO_IN);
gpio_pull_up(BUTTON_DEFS[i].sw_gpio);
}
for (int i = 0; i < BUTTON_NUM; i++)
{
gpio_init(BUTTON_DEFS[i].led_gpio);
gpio_set_dir(BUTTON_DEFS[i].led_gpio, GPIO_OUT);
}
}
uint8_t button_num()
{
return BUTTON_NUM;
}
/* If a switch flips, it freezes for a while */
#define DEBOUNCE_FREEZE_TIME_US 1000
uint16_t button_read()
{
uint64_t now = time_us_64();
uint16_t buttons = 0;
for (int i = BUTTON_NUM - 1; i >= 0; i--) {
bool sw_pressed = !gpio_get(BUTTON_DEFS[i].sw_gpio);
if (now >= sw_freeze_time[i]) {
if (sw_pressed != sw_val[i]) {
sw_val[i] = sw_pressed;
sw_freeze_time[i] = now + DEBOUNCE_FREEZE_TIME_US;
rgb_stimulate();
}
}
buttons <<= 1;
if (sw_val[i]) {
buttons |= 1;
}
}
return buttons;
}
#define HID_EXPIRE_DURATION 1000000ULL
static uint32_t hid_expire_time = 0;
static bool hid_lights[BUTTON_NUM];
static uint8_t hid_pwm[BUTTON_NUM];
void light_soft_pwm()
{
static uint16_t pwm_cycle = 0;
pwm_cycle = (pwm_cycle + 1) % 900;
for (int i = 0; i < BUTTON_NUM; i++) {
if (BUTTON_DEFS[i].led_gpio >= 0) {
gpio_put(BUTTON_DEFS[i].led_gpio, pwm_cycle <= hid_pwm[i] * hid_pwm[i]);
}
}
}
void light_fade()
{
static uint64_t update_time = 0;
uint64_t now = time_us_64();
if (now - update_time > 6000) {
update_time = now;
for (int i = 0; i < BUTTON_NUM; i++) {
if (hid_pwm[i] > 0) {
hid_pwm[i]--;
}
}
}
}
void button_update_light()
{
bool hid_active = (time_us_64() < hid_expire_time);
for (int i = 0; i < BUTTON_NUM; i++) {
bool turn_on = hid_active ? hid_lights[i] : sw_val[i];
if (turn_on) {
hid_pwm[i] = 35;
}
}
light_soft_pwm();
light_fade();
}
void button_set_light(uint8_t const *lights, uint8_t num)
{
for (int i = 0; (i < num) && (i < BUTTON_NUM); i++) {
hid_lights[i] = (lights[i] > 0);
}
hid_expire_time = time_us_64() + HID_EXPIRE_DURATION;
}

19
FIRMWARE/src/buttons.h
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@ -1,19 +0,0 @@
/*
* Pico Popn Controller Buttons
* WHowe <github.com/whowechina>
*/
#ifndef BUTTONS_H
#define BUTTONS_H
#include <stdint.h>
#include <stdbool.h>
void button_init();
uint8_t button_num();
uint16_t button_read();
void button_update_light();
void button_set_light(uint8_t const *lights, uint8_t num);
#endif

94
FIRMWARE/src/main.c
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@ -1,94 +0,0 @@
/*
* Pico Popn Controller Main
* WHowe <github.com/whowechina>
*/
#include <stdint.h>
#include <stdbool.h>
#include "bsp/board.h"
#include "tusb.h"
#include "usb_descriptors.h"
#include "buttons.h"
#include "rgb.h"
#define BUTTON_LIGHT_MAX_NUM 32 /* Must be larger than number of buttons */
bool button_lights[BUTTON_LIGHT_MAX_NUM] = {0};
void update_lights()
{
button_update_light();
}
struct report
{
uint16_t buttons;
uint8_t joy0;
uint8_t joy1;
} report;
void main_loop()
{
if (tud_hid_ready())
{
report.joy0 = 0;
report.joy1 = 0;
tud_hid_n_report(0x00, REPORT_ID_JOYSTICK, &report, sizeof(report));
}
}
void init()
{
board_init();
tusb_init();
button_init();
rgb_init();
}
int main(void)
{
init();
while (1)
{
tud_task();
report.buttons = button_read();
main_loop();
update_lights();
}
return 0;
}
// Invoked when received GET_REPORT control request
// Application must fill buffer report's content and return its length.
// Return zero will cause the stack to STALL request
uint16_t tud_hid_get_report_cb(uint8_t itf, uint8_t report_id,
hid_report_type_t report_type, uint8_t *buffer,
uint16_t reqlen)
{
return 0;
}
// Invoked when received SET_REPORT control request or
// received data on OUT endpoint ( Report ID = 0, Type = 0 )
void tud_hid_set_report_cb(uint8_t itf, uint8_t report_id,
hid_report_type_t report_type, uint8_t const *buffer,
uint16_t bufsize)
{
if ((report_id == REPORT_ID_LIGHTS) &&
(report_type == HID_REPORT_TYPE_OUTPUT)) {
if (bufsize < button_num() + 3) { /* including logo rgb */
return;
}
for (int i = 0; i < button_num(); i++) {
button_lights[i] = (buffer[i] > 0);
}
button_set_light(buffer, button_num());
uint8_t const *rgb = buffer + button_num();
rgb_update_logo(rgb[0], rgb[1], rgb[2]);
}
}

147
FIRMWARE/src/rgb.c
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@ -1,147 +0,0 @@
/*
* Pico Popn Controller Buttons
* WHowe <github.com/whowechina>
*
* A button consists of a switch and an LED
*/
#include "buttons.h"
#include <stdint.h>
#include <stdbool.h>
#include "pico/multicore.h"
#include "hardware/pio.h"
#include "hardware/timer.h"
#include "ws2812.pio.h"
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define WS2812_PIN 28
uint8_t logo_leds[] = {0, 1, 2};
uint8_t effect_leds[] = {3, 4, 5, 6, 7, 8, 9};
static inline void put_pixel(uint32_t pixel_grb)
{
pio_sm_put_blocking(pio0, 0, pixel_grb << 8u);
}
static inline uint32_t urgb_u32(uint8_t r, uint8_t g, uint8_t b)
{
/* better gamma curve */
uint32_t r32 = (uint32_t)r * r;
uint32_t g32 = (uint32_t)g * g;
uint32_t b32 = (uint32_t)b * b;
return (g32 >> 8 << 16) | (r32 >> 8 << 8) | (b32 >> 8 << 0);
}
/* 6 segment regular hsv color wheel, better color cycle
* https://www.arnevogel.com/rgb-rainbow/
* https://www.instructables.com/How-to-Make-Proper-Rainbow-and-Random-Colors-With-/
*/
uint32_t color_wheel(int index)
{
uint32_t section = index / 256 % 6;
uint8_t incr = index % 256;
uint8_t decr = 255 - incr;
if (section == 0) {
return urgb_u32(incr, 0, 255);
} else if (section == 1) {
return urgb_u32(255, 0, decr);
} else if (section == 2) {
return urgb_u32(255, incr, 0);
} else if (section == 3) {
return urgb_u32(decr, 255, 0);
} else if (section == 4) {
return urgb_u32(0, 255, incr);
} else {
return urgb_u32(0, decr, 255);
}
}
static uint32_t led_buf[sizeof(logo_leds) + sizeof(effect_leds)];
void update_led()
{
for (int i = 0; i < ARRAY_SIZE(led_buf); i++) {
put_pixel(led_buf[i]);
}
}
#define HID_EXPIRE_DURATION 1000000ULL
static uint32_t hid_expire_time = 0;
#define RAINBOW_SPEED_MAX 100
#define RAINBOW_SPEED_MIN 4
#define RAINBOW_PITCH 151
#define RAINBOW_SPEED_DOWN_INTERVAL 200000ULL
uint32_t speed = RAINBOW_SPEED_MIN;
void rainbow_update()
{
static uint32_t rotator = 0;
rotator += speed;
for (int i = 0; i < sizeof(effect_leds); i++) {
led_buf[effect_leds[i]] = color_wheel(rotator + RAINBOW_PITCH * i);
}
if (time_us_64() < hid_expire_time) {
return;
}
/* When there's no HID light input, use Logo LEDs for rainbow flow */
uint32_t offset = rotator + RAINBOW_PITCH * sizeof(effect_leds);
for (int i = 0; i < sizeof(logo_leds); i++) {
led_buf[logo_leds[i]] = color_wheel(offset + RAINBOW_PITCH * i);
}
}
void rainbow_speed_up()
{
if (speed < RAINBOW_SPEED_MAX) {
speed++;
}
}
void rainbow_speed_down()
{
static uint64_t next_change_time = 0;
uint64_t now = time_us_64();
if (now >= next_change_time) {
next_change_time = now + RAINBOW_SPEED_DOWN_INTERVAL;
if (speed > RAINBOW_SPEED_MIN) {
speed = speed * 95 / 100;
}
}
}
void rgb_update_logo(uint8_t r, uint8_t g, uint8_t b)
{
uint32_t color = urgb_u32(r, g, b);
for (int i = 0; i < sizeof(logo_leds); i++) {
led_buf[logo_leds[i]] = color;
}
hid_expire_time = time_us_64() + HID_EXPIRE_DURATION;
}
void rgb_stimulate()
{
rainbow_speed_up();
}
void rgb_entry()
{
while (1) {
rainbow_update();
rainbow_speed_down();
update_led();
sleep_ms(10);
}
}
void rgb_init()
{
uint offset = pio_add_program(pio0, &ws2812_program);
ws2812_program_init(pio0, 0, offset, WS2812_PIN, 800000, false);
multicore_launch_core1(rgb_entry);
}

15
FIRMWARE/src/rgb.h
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@ -1,15 +0,0 @@
/*
* Pico Popn Controller Buttons
* WHowe <github.com/whowechina>
*/
#ifndef RGB_H
#define RGB_H
#include <stdint.h>
void rgb_init();
void rgb_update_logo(uint8_t r, uint8_t g, uint8_t b);
void rgb_stimulate();
#endif

112
FIRMWARE/src/tusb_config.h
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@ -1,112 +0,0 @@
/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#ifndef _TUSB_CONFIG_H_
#define _TUSB_CONFIG_H_
#ifdef __cplusplus
extern "C" {
#endif
//--------------------------------------------------------------------
// COMMON CONFIGURATION
//--------------------------------------------------------------------
// defined by board.mk
#ifndef CFG_TUSB_MCU
#error CFG_TUSB_MCU must be defined
#endif
// RHPort number used for device can be defined by board.mk, default to port 0
#ifndef BOARD_DEVICE_RHPORT_NUM
#define BOARD_DEVICE_RHPORT_NUM 0
#endif
// RHPort max operational speed can defined by board.mk
// Default to Highspeed for MCU with internal HighSpeed PHY (can be port
// specific), otherwise FullSpeed
#ifndef BOARD_DEVICE_RHPORT_SPEED
#if (CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_LPC43XX || \
CFG_TUSB_MCU == OPT_MCU_MIMXRT10XX || CFG_TUSB_MCU == OPT_MCU_NUC505 || \
CFG_TUSB_MCU == OPT_MCU_CXD56)
#define BOARD_DEVICE_RHPORT_SPEED OPT_MODE_HIGH_SPEED
#else
#define BOARD_DEVICE_RHPORT_SPEED OPT_MODE_FULL_SPEED
#endif
#endif
// Device mode with rhport and speed defined by board.mk
#if BOARD_DEVICE_RHPORT_NUM == 0
#define CFG_TUSB_RHPORT0_MODE (OPT_MODE_DEVICE | BOARD_DEVICE_RHPORT_SPEED)
#elif BOARD_DEVICE_RHPORT_NUM == 1
#define CFG_TUSB_RHPORT1_MODE (OPT_MODE_DEVICE | BOARD_DEVICE_RHPORT_SPEED)
#else
#error "Incorrect RHPort configuration"
#endif
#ifndef CFG_TUSB_OS
#define CFG_TUSB_OS OPT_OS_NONE
#endif
// CFG_TUSB_DEBUG is defined by compiler in DEBUG build
// #define CFG_TUSB_DEBUG 0
/* USB DMA on some MCUs can only access a specific SRAM region with restriction
* on alignment. Tinyusb use follows macros to declare transferring memory so
* that they can be put into those specific section. e.g
* - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
* - CFG_TUSB_MEM_ALIGN : __attribute__ ((aligned(4)))
*/
#ifndef CFG_TUSB_MEM_SECTION
#define CFG_TUSB_MEM_SECTION
#endif
#ifndef CFG_TUSB_MEM_ALIGN
#define CFG_TUSB_MEM_ALIGN __attribute__((aligned(4)))
#endif
//--------------------------------------------------------------------
// DEVICE CONFIGURATION
//--------------------------------------------------------------------
#ifndef CFG_TUD_ENDPOINT0_SIZE
#define CFG_TUD_ENDPOINT0_SIZE 64
#endif
//------------- CLASS -------------//
#define CFG_TUD_HID 1
#define CFG_TUD_CDC 0
#define CFG_TUD_MSC 0
#define CFG_TUD_MIDI 0
#define CFG_TUD_VENDOR 0
// HID buffer size Should be sufficient to hold ID (if any) + Data
#define CFG_TUD_HID_EP_BUFSIZE 64
#ifdef __cplusplus
}
#endif
#endif /* _TUSB_CONFIG_H_ */

182
FIRMWARE/src/usb_descriptors.c
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@ -1,182 +0,0 @@
/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "usb_descriptors.h"
#include "tusb.h"
/* A combination of interfaces must have a unique product id, since PC will save
* device driver after the first plug. Same VID/PID with different interface e.g
* MSC (first), then CDC (later) will possibly cause system error on PC.
*
* Auto ProductID layout's Bitmap:
* [MSB] HID | MSC | CDC [LSB]
*/
#define _PID_MAP(itf, n) ((CFG_TUD_##itf) << (n))
#define USB_PID \
(0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \
_PID_MAP(MIDI, 3) | _PID_MAP(VENDOR, 4))
//--------------------------------------------------------------------+
// Device Descriptors
//--------------------------------------------------------------------+
tusb_desc_device_t const desc_device_joy = {
.bLength = sizeof(tusb_desc_device_t),
.bDescriptorType = TUSB_DESC_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = 0x00,
.bDeviceSubClass = 0x00,
.bDeviceProtocol = 0x00,
.bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
.idVendor = 0xCafe,
.idProduct = USB_PID,
.bcdDevice = 0x0100,
.iManufacturer = 0x01,
.iProduct = 0x02,
.iSerialNumber = 0x03,
.bNumConfigurations = 0x01};
// Invoked when received GET DEVICE DESCRIPTOR
// Application return pointer to descriptor
uint8_t const* tud_descriptor_device_cb(void) {
return (uint8_t const*)&desc_device_joy;
}
//--------------------------------------------------------------------+
// HID Report Descriptor
//--------------------------------------------------------------------+
uint8_t const desc_hid_report_joy[] = {
GAMECON_REPORT_DESC_JOYSTICK(HID_REPORT_ID(REPORT_ID_JOYSTICK)),
GAMECON_REPORT_DESC_LIGHTS(HID_REPORT_ID(REPORT_ID_LIGHTS))
};
// Invoked when received GET HID REPORT DESCRIPTOR
// Application return pointer to descriptor
// Descriptor contents must exist long enough for transfer to complete
uint8_t const* tud_hid_descriptor_report_cb(uint8_t itf) {
(void)itf;
return desc_hid_report_joy;
}
//--------------------------------------------------------------------+
// Configuration Descriptor
//--------------------------------------------------------------------+
enum { ITF_NUM_HID, ITF_NUM_TOTAL };
#define CONFIG_TOTAL_LEN (TUD_CONFIG_DESC_LEN + TUD_HID_DESC_LEN)
#define EPNUM_HID 0x81
uint8_t const desc_configuration_joy[] = {
// Config number, interface count, string index, total length, attribute,
// power in mA
TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN,
TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, 100),
// Interface number, string index, protocol, report descriptor len, EP In
// address, size & polling interval
TUD_HID_DESCRIPTOR(ITF_NUM_HID, 0, HID_ITF_PROTOCOL_NONE,
sizeof(desc_hid_report_joy), EPNUM_HID,
CFG_TUD_HID_EP_BUFSIZE, 1)};
// Invoked when received GET CONFIGURATION DESCRIPTOR
// Application return pointer to descriptor
// Descriptor contents must exist long enough for transfer to complete
uint8_t const* tud_descriptor_configuration_cb(uint8_t index) {
(void)index; // for multiple configurations
return desc_configuration_joy;
}
//--------------------------------------------------------------------+
// String Descriptors
//--------------------------------------------------------------------+
// array of pointer to string descriptors
char const* string_desc_arr[] = {
(const char[]){0x09, 0x04}, // 0: is supported language is English (0x0409)
"WHowe" , // 1: Manufacturer
"Pico Popn Controller", // 2: Product
"123456", // 3: Serials, should use chip ID
"Button 1",
"Button 2",
"Button 3",
"Button 4",
"Button 5",
"Button 6",
"Button 7",
"Button 8",
"Button 9",
"Button 10",
"Button 11",
"Logo Red",
"Logo Green",
"Logo Blue",
};
static uint16_t _desc_str[64];
// Invoked when received GET STRING DESCRIPTOR request
// Application return pointer to descriptor, whose contents must exist long
// enough for transfer to complete
uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
(void)langid;
uint8_t chr_count;
if (index == 0) {
memcpy(&_desc_str[1], string_desc_arr[0], 2);
chr_count = 1;
} else {
// Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors.
// https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors
if (index < sizeof(string_desc_arr) / sizeof(string_desc_arr[0])) {
const char* str = string_desc_arr[index];
// Cap at max char
chr_count = strlen(str);
if (chr_count > 63) chr_count = 63;
// Convert ASCII string into UTF-16
for (uint8_t i = 0; i < chr_count; i++) {
_desc_str[1 + i] = str[i];
}
} else {
_desc_str[1] = 'X';
chr_count = 1;
}
}
// first byte is length (including header), second byte is string type
_desc_str[0] = (TUSB_DESC_STRING << 8) | (2 * chr_count + 2);
return _desc_str;
}

65
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@ -1,65 +0,0 @@
#ifndef USB_DESCRIPTORS_H_
#define USB_DESCRIPTORS_H_
#include "common/tusb_common.h"
#include "device/usbd.h"
enum {
REPORT_ID_JOYSTICK = 1,
REPORT_ID_LIGHTS,
REPORT_ID_KEYBOARD,
REPORT_ID_MOUSE,
};
// because they are missing from tusb_hid.h
#define HID_STRING_INDEX(x) HID_REPORT_ITEM(x, 7, RI_TYPE_LOCAL, 1)
#define HID_STRING_INDEX_N(x, n) HID_REPORT_ITEM(x, 7, RI_TYPE_LOCAL, n)
#define HID_STRING_MINIMUM(x) HID_REPORT_ITEM(x, 8, RI_TYPE_LOCAL, 1)
#define HID_STRING_MINIMUM_N(x, n) HID_REPORT_ITEM(x, 8, RI_TYPE_LOCAL, n)
#define HID_STRING_MAXIMUM(x) HID_REPORT_ITEM(x, 9, RI_TYPE_LOCAL, 1)
#define HID_STRING_MAXIMUM_N(x, n) HID_REPORT_ITEM(x, 9, RI_TYPE_LOCAL, n)
// Joystick Report Descriptor Template - Based off Drewol/rp2040-gamecon
// Button Map | X | Y
#define GAMECON_REPORT_DESC_JOYSTICK(...) \
HID_USAGE_PAGE(HID_USAGE_PAGE_DESKTOP), \
HID_USAGE(HID_USAGE_DESKTOP_JOYSTICK), \
HID_COLLECTION(HID_COLLECTION_APPLICATION), \
__VA_ARGS__ HID_USAGE_PAGE(HID_USAGE_PAGE_BUTTON), HID_USAGE_MIN(1), \
HID_USAGE_MAX(11), \
HID_LOGICAL_MIN(0), HID_LOGICAL_MAX(1), HID_REPORT_COUNT(11), \
HID_REPORT_SIZE(1), HID_INPUT(HID_DATA | HID_VARIABLE | HID_ABSOLUTE), \
HID_REPORT_COUNT(1), HID_REPORT_SIZE(16 - 11), /*Padding*/\
HID_INPUT(HID_CONSTANT | HID_VARIABLE | HID_ABSOLUTE), \
HID_USAGE_PAGE(HID_USAGE_PAGE_DESKTOP), HID_LOGICAL_MIN(0x00), \
HID_LOGICAL_MAX_N(0x00ff, 2), \
HID_USAGE(HID_USAGE_DESKTOP_X), /*Joystick*/ \
HID_USAGE(HID_USAGE_DESKTOP_Y), HID_REPORT_COUNT(2), HID_REPORT_SIZE(8), \
HID_INPUT(HID_DATA | HID_VARIABLE | HID_ABSOLUTE), HID_COLLECTION_END
// Light Map
#define GAMECON_REPORT_DESC_LIGHTS(...) \
HID_USAGE_PAGE(HID_USAGE_PAGE_DESKTOP), HID_USAGE(0x00), \
HID_COLLECTION(HID_COLLECTION_APPLICATION), \
__VA_ARGS__ HID_REPORT_COUNT(11 + 3), /*LED NUM + RGB */ \
HID_REPORT_SIZE(8), HID_LOGICAL_MIN(0x00), HID_LOGICAL_MAX_N(0x00ff, 2), \
HID_USAGE_PAGE(HID_USAGE_PAGE_ORDINAL), HID_STRING_MINIMUM(4), \
HID_STRING_MAXIMUM(16), HID_USAGE_MIN(1), HID_USAGE_MAX(16), \
HID_OUTPUT(HID_DATA | HID_VARIABLE | HID_ABSOLUTE), HID_REPORT_COUNT(1), \
HID_REPORT_SIZE(8), /*Padding*/ \
HID_INPUT(HID_CONSTANT | HID_VARIABLE | HID_ABSOLUTE), \
HID_COLLECTION_END
// NKRO Descriptor
#define GAMECON_REPORT_DESC_NKRO(...) \
HID_USAGE_PAGE(HID_USAGE_PAGE_DESKTOP), HID_USAGE(HID_USAGE_PAGE_KEYBOARD), \
HID_COLLECTION(HID_COLLECTION_APPLICATION), \
__VA_ARGS__ HID_REPORT_SIZE(1), HID_REPORT_COUNT(8), \
HID_USAGE_PAGE(HID_USAGE_PAGE_KEYBOARD), HID_USAGE_MIN(224), \
HID_USAGE_MAX(231), HID_LOGICAL_MIN(0), HID_LOGICAL_MAX(1), \
HID_INPUT(HID_VARIABLE), HID_REPORT_SIZE(1), HID_REPORT_COUNT(31 * 8), \
HID_LOGICAL_MIN(0), HID_LOGICAL_MAX(1), \
HID_USAGE_PAGE(HID_USAGE_PAGE_KEYBOARD), HID_USAGE_MIN(0), \
HID_USAGE_MAX(31 * 8 - 1), HID_INPUT(HID_VARIABLE), HID_COLLECTION_END
#endif /* USB_DESCRIPTORS_H_ */

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FIRMWARE/src/ws2812.pio
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;
; Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
;
; SPDX-License-Identifier: BSD-3-Clause
;
.program ws2812
.side_set 1
.define public T1 2
.define public T2 5
.define public T3 3
.lang_opt python sideset_init = pico.PIO.OUT_HIGH
.lang_opt python out_init = pico.PIO.OUT_HIGH
.lang_opt python out_shiftdir = 1
.wrap_target
bitloop:
out x, 1 side 0 [T3 - 1] ; Side-set still takes place when instruction stalls
jmp !x do_zero side 1 [T1 - 1] ; Branch on the bit we shifted out. Positive pulse
do_one:
jmp bitloop side 1 [T2 - 1] ; Continue driving high, for a long pulse
do_zero:
nop side 0 [T2 - 1] ; Or drive low, for a short pulse
.wrap
% c-sdk {
#include "hardware/clocks.h"
static inline void ws2812_program_init(PIO pio, uint sm, uint offset, uint pin, float freq, bool rgbw) {
pio_gpio_init(pio, pin);
pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
pio_sm_config c = ws2812_program_get_default_config(offset);
sm_config_set_sideset_pins(&c, pin);
sm_config_set_out_shift(&c, false, true, rgbw ? 32 : 24);
sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
int cycles_per_bit = ws2812_T1 + ws2812_T2 + ws2812_T3;
float div = clock_get_hz(clk_sys) / (freq * cycles_per_bit);
sm_config_set_clkdiv(&c, div);
pio_sm_init(pio, sm, offset, &c);
pio_sm_set_enabled(pio, sm, true);
}
%}
.program ws2812_parallel
.define public T1 2
.define public T2 5
.define public T3 3
.wrap_target
out x, 32
mov pins, !null [T1-1]
mov pins, x [T2-1]
mov pins, null [T3-2]
.wrap
% c-sdk {
#include "hardware/clocks.h"
static inline void ws2812_parallel_program_init(PIO pio, uint sm, uint offset, uint pin_base, uint pin_count, float freq) {
for(uint i=pin_base; i<pin_base+pin_count; i++) {
pio_gpio_init(pio, i);
}
pio_sm_set_consecutive_pindirs(pio, sm, pin_base, pin_count, true);
pio_sm_config c = ws2812_parallel_program_get_default_config(offset);
sm_config_set_out_shift(&c, true, true, 32);
sm_config_set_out_pins(&c, pin_base, pin_count);
sm_config_set_set_pins(&c, pin_base, pin_count);
sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
int cycles_per_bit = ws2812_parallel_T1 + ws2812_parallel_T2 + ws2812_parallel_T3;
float div = clock_get_hz(clk_sys) / (freq * cycles_per_bit);
sm_config_set_clkdiv(&c, div);
pio_sm_init(pio, sm, offset, &c);
pio_sm_set_enabled(pio, sm, true);
}
%}