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/*
* The MIT License (MIT)
*
* Copyright (c) 2021, 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 "bsp/board.h"
#include "tusb.h"
/* From https://www.kernel.org/doc/html/latest/input/gamepad.html
____________________________ __
/ [__ZL__] [__ZR__] \ |
/ [__ TL __] [__ TR __] \ | Front Triggers
__/________________________________\__ __|
/ _ \ |
/ /\ __ (N) \ |
/ || __ |MO| __ _ _ \ | Main Pad
| <===DP===> |SE| |ST| (W) -|- (E) | |
\ || ___ ___ _ / |
/\ \/ / \ / \ (S) /\ __|
/ \________ | LS | ____ | RS | ________/ \ |
| / \ \___/ / \ \___/ / \ | | Control Sticks
| / \_____/ \_____/ \ | __|
| / \ |
\_____/ \_____/
|________|______| |______|___________|
D-Pad Left Right Action Pad
Stick Stick
|_____________|
Menu Pad
Most gamepads have the following features:
- Action-Pad 4 buttons in diamonds-shape (on the right side) NORTH, SOUTH, WEST and EAST.
- D-Pad (Direction-pad) 4 buttons (on the left side) that point up, down, left and right.
- Menu-Pad Different constellations, but most-times 2 buttons: SELECT - START.
- Analog-Sticks provide freely moveable sticks to control directions, Analog-sticks may also
provide a digital button if you press them.
- Triggers are located on the upper-side of the pad in vertical direction. The upper buttons
are normally named Left- and Right-Triggers, the lower buttons Z-Left and Z-Right.
- Rumble Many devices provide force-feedback features. But are mostly just simple rumble motors.
*/
// Sony DS4 report layout detail https://www.psdevwiki.com/ps4/DS4-USB
typedef struct TU_ATTR_PACKED
{
uint8_t x, y, z, rz; // joystick
struct {
uint8_t dpad : 4; // (hat format, 0x08 is released, 0=N, 1=NE, 2=E, 3=SE, 4=S, 5=SW, 6=W, 7=NW)
uint8_t square : 1; // west
uint8_t cross : 1; // south
uint8_t circle : 1; // east
uint8_t triangle : 1; // north
};
struct {
uint8_t l1 : 1;
uint8_t r1 : 1;
uint8_t l2 : 1;
uint8_t r2 : 1;
uint8_t share : 1;
uint8_t option : 1;
uint8_t l3 : 1;
uint8_t r3 : 1;
};
struct {
uint8_t ps : 1; // playstation button
uint8_t tpad : 1; // track pad click
uint8_t counter : 6; // +1 each report
};
// comment out since not used by this example
// uint8_t l2_trigger; // 0 released, 0xff fully pressed
// uint8_t r2_trigger; // as above
// uint16_t timestamp;
// uint8_t battery;
//
// int16_t gyro[3]; // x, y, z;
// int16_t accel[3]; // x, y, z
// there is still lots more info
} sony_ds4_report_t;
// check if device is Sony DualShock 4
static inline bool is_sony_ds4(uint8_t dev_addr)
{
uint16_t vid, pid;
tuh_vid_pid_get(dev_addr, &vid, &pid);
return (vid == 0x054c && pid == 0x09cc);
}
//--------------------------------------------------------------------+
// MACRO TYPEDEF CONSTANT ENUM DECLARATION
//--------------------------------------------------------------------+
void hid_app_task(void)
{
// nothing to do
}
//--------------------------------------------------------------------+
// TinyUSB Callbacks
//--------------------------------------------------------------------+
// Invoked when device with hid interface is mounted
// Report descriptor is also available for use. tuh_hid_parse_report_descriptor()
// can be used to parse common/simple enough descriptor.
// Note: if report descriptor length > CFG_TUH_ENUMERATION_BUFSIZE, it will be skipped
// therefore report_desc = NULL, desc_len = 0
void tuh_hid_mount_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* desc_report, uint16_t desc_len)
{
uint16_t vid, pid;
tuh_vid_pid_get(dev_addr, &vid, &pid);
printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance);
printf("VID = %04x, PID = %04x\r\n", vid, pid);
// Sony DualShock 4 [CUH-ZCT2x]
if ( is_sony_ds4(dev_addr) )
{
// request to receive report
// tuh_hid_report_received_cb() will be invoked when report is available
if ( !tuh_hid_receive_report(dev_addr, instance) )
{
printf("Error: cannot request to receive report\r\n");
}
}
}
// Invoked when device with hid interface is un-mounted
void tuh_hid_umount_cb(uint8_t dev_addr, uint8_t instance)
{
printf("HID device address = %d, instance = %d is unmounted\r\n", dev_addr, instance);
}
// check if different than 2
bool diff_than_2(uint8_t x, uint8_t y)
{
return (x - y > 2) || (y - x > 2);
}
// check if 2 reports are different enough
bool diff_report(sony_ds4_report_t const* rpt1, sony_ds4_report_t const* rpt2)
{
bool result;
// x, y, z, rz must different than 2 to be counted
result = diff_than_2(rpt1->x, rpt2->x) || diff_than_2(rpt1->y , rpt2->y ) ||
diff_than_2(rpt1->z, rpt2->z) || diff_than_2(rpt1->rz, rpt2->rz);
// check the reset with mem compare
result |= memcmp(&rpt1->rz + 1, &rpt2->rz + 1, sizeof(sony_ds4_report_t)-4);
return result;
}
void process_sony_ds4(uint8_t const* report, uint16_t len)
{
const char* dpad_str[] = { "N", "NE", "E", "SE", "S", "SW", "W", "NW", "none" };
// previous report used to compare for changes
static sony_ds4_report_t prev_report = { 0 };
uint8_t const report_id = report[0];
report++;
len--;
// all buttons state is stored in ID 1
if (report_id == 1)
{
sony_ds4_report_t ds4_report;
memcpy(&ds4_report, report, sizeof(ds4_report));
// counter is +1, assign to make it easier to compare 2 report
prev_report.counter = ds4_report.counter;
// only print if changes since it is polled ~ 5ms
// Since count+1 after each report and x, y, z, rz fluctuate within 1 or 2
// We need more than memcmp to check if report is different enough
if ( diff_report(&prev_report, &ds4_report) )
{
printf("(x, y, z, rz) = (%u, %u, %u, %u)\r\n", ds4_report.x, ds4_report.y, ds4_report.z, ds4_report.rz);
printf("DPad = %s ", dpad_str[ds4_report.dpad]);
if (ds4_report.square ) printf("Square ");
if (ds4_report.cross ) printf("Cross ");
if (ds4_report.circle ) printf("Circle ");
if (ds4_report.triangle ) printf("Triangle ");
if (ds4_report.l1 ) printf("L1 ");
if (ds4_report.r1 ) printf("R1 ");
if (ds4_report.l2 ) printf("L2 ");
if (ds4_report.r2 ) printf("R2 ");
if (ds4_report.share ) printf("Share ");
if (ds4_report.option ) printf("Option ");
if (ds4_report.l3 ) printf("L3 ");
if (ds4_report.r3 ) printf("R3 ");
if (ds4_report.ps ) printf("PS ");
if (ds4_report.tpad ) printf("TPad ");
printf("\r\n");
}
prev_report = ds4_report;
}
}
// Invoked when received report from device via interrupt endpoint
void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t const* report, uint16_t len)
{
if ( is_sony_ds4(dev_addr) )
{
process_sony_ds4(report, len);
}
// continue to request to receive report
if ( !tuh_hid_receive_report(dev_addr, instance) )
{
printf("Error: cannot request to receive report\r\n");
}
}
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