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Diffstat (limited to 'examples/host/cdc_msc_hid_freertos/src/hid_app.c')
| -rw-r--r-- | examples/host/cdc_msc_hid_freertos/src/hid_app.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/examples/host/cdc_msc_hid_freertos/src/hid_app.c b/examples/host/cdc_msc_hid_freertos/src/hid_app.c new file mode 100644 index 000000000..9ea5c1be0 --- /dev/null +++ b/examples/host/cdc_msc_hid_freertos/src/hid_app.c @@ -0,0 +1,267 @@ +/* + * 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_api.h" +#include "tusb.h" + +//--------------------------------------------------------------------+ +// MACRO TYPEDEF CONSTANT ENUM DECLARATION +//--------------------------------------------------------------------+ + +// If your host terminal support ansi escape code such as TeraTerm +// it can be use to simulate mouse cursor movement within terminal +#define USE_ANSI_ESCAPE 0 + +#define MAX_REPORT 4 + +static uint8_t const keycode2ascii[128][2] = { HID_KEYCODE_TO_ASCII }; + +// Each HID instance can has multiple reports +static struct { + uint8_t report_count; + tuh_hid_report_info_t report_info[MAX_REPORT]; +} hid_info[CFG_TUH_HID]; + +static void process_kbd_report(hid_keyboard_report_t const *report); +static void process_mouse_report(hid_mouse_report_t const *report); +static void process_generic_report(uint8_t dev_addr, uint8_t instance, uint8_t const *report, uint16_t len); + +void hid_app_init(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) { + printf("HID device address = %d, instance = %d is mounted\r\n", dev_addr, instance); + + // Interface protocol (hid_interface_protocol_enum_t) + const char *protocol_str[] = { "None", "Keyboard", "Mouse" }; + uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance); + + printf("HID Interface Protocol = %s\r\n", protocol_str[itf_protocol]); + + // By default host stack will use activate boot protocol on supported interface. + // Therefore for this simple example, we only need to parse generic report descriptor (with built-in parser) + if (itf_protocol == HID_ITF_PROTOCOL_NONE) { + hid_info[instance].report_count = tuh_hid_parse_report_descriptor(hid_info[instance].report_info, MAX_REPORT, + desc_report, desc_len); + printf("HID has %u reports \r\n", hid_info[instance].report_count); + } + + // 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); +} + +// 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) { + uint8_t const itf_protocol = tuh_hid_interface_protocol(dev_addr, instance); + + switch (itf_protocol) { + case HID_ITF_PROTOCOL_KEYBOARD: + TU_LOG2("HID receive boot keyboard report\r\n"); + process_kbd_report((hid_keyboard_report_t const *) report); + break; + + case HID_ITF_PROTOCOL_MOUSE: + TU_LOG2("HID receive boot mouse report\r\n"); + process_mouse_report((hid_mouse_report_t const *) report); + break; + + default: + // Generic report requires matching ReportID and contents with previous parsed report info + process_generic_report(dev_addr, instance, report, len); + break; + } + + // continue to request to receive report + if (!tuh_hid_receive_report(dev_addr, instance)) { + printf("Error: cannot request to receive report\r\n"); + } +} + +//--------------------------------------------------------------------+ +// Keyboard +//--------------------------------------------------------------------+ + +// look up new key in previous keys +static inline bool find_key_in_report(hid_keyboard_report_t const *report, uint8_t keycode) { + for (uint8_t i = 0; i < 6; i++) { + if (report->keycode[i] == keycode) return true; + } + + return false; +} + +static void process_kbd_report(hid_keyboard_report_t const *report) { + static hid_keyboard_report_t prev_report = { 0, 0, { 0 } }; // previous report to check key released + + //------------- example code ignore control (non-printable) key affects -------------// + for (uint8_t i = 0; i < 6; i++) { + if (report->keycode[i]) { + if (find_key_in_report(&prev_report, report->keycode[i])) { + // exist in previous report means the current key is holding + } else { + // not existed in previous report means the current key is pressed + bool const is_shift = report->modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT); + uint8_t ch = keycode2ascii[report->keycode[i]][is_shift ? 1 : 0]; + putchar(ch); + if (ch == '\r') putchar('\n'); // added new line for enter key + + #ifndef __ICCARM__ // TODO IAR doesn't support stream control ? + fflush(stdout); // flush right away, else nanolib will wait for newline + #endif + } + } + // TODO example skips key released + } + + prev_report = *report; +} + +//--------------------------------------------------------------------+ +// Mouse +//--------------------------------------------------------------------+ + +void cursor_movement(int8_t x, int8_t y, int8_t wheel) { +#if USE_ANSI_ESCAPE + // Move X using ansi escape + if ( x < 0) { + printf(ANSI_CURSOR_BACKWARD(%d), (-x)); // move left + }else if ( x > 0) { + printf(ANSI_CURSOR_FORWARD(%d), x); // move right + } + + // Move Y using ansi escape + if ( y < 0) { + printf(ANSI_CURSOR_UP(%d), (-y)); // move up + }else if ( y > 0) { + printf(ANSI_CURSOR_DOWN(%d), y); // move down + } + + // Scroll using ansi escape + if (wheel < 0) { + printf(ANSI_SCROLL_UP(%d), (-wheel)); // scroll up + }else if (wheel > 0) { + printf(ANSI_SCROLL_DOWN(%d), wheel); // scroll down + } + + printf("\r\n"); +#else + printf("(%d %d %d)\r\n", x, y, wheel); +#endif +} + +static void process_mouse_report(hid_mouse_report_t const *report) { + static hid_mouse_report_t prev_report = { 0 }; + + //------------- button state -------------// + uint8_t button_changed_mask = report->buttons ^ prev_report.buttons; + if (button_changed_mask & report->buttons) { + printf(" %c%c%c ", + report->buttons & MOUSE_BUTTON_LEFT ? 'L' : '-', + report->buttons & MOUSE_BUTTON_MIDDLE ? 'M' : '-', + report->buttons & MOUSE_BUTTON_RIGHT ? 'R' : '-'); + } + + //------------- cursor movement -------------// + cursor_movement(report->x, report->y, report->wheel); +} + +//--------------------------------------------------------------------+ +// Generic Report +//--------------------------------------------------------------------+ +static void process_generic_report(uint8_t dev_addr, uint8_t instance, uint8_t const *report, uint16_t len) { + (void) dev_addr; + + uint8_t const rpt_count = hid_info[instance].report_count; + tuh_hid_report_info_t *rpt_info_arr = hid_info[instance].report_info; + tuh_hid_report_info_t *rpt_info = NULL; + + if (rpt_count == 1 && rpt_info_arr[0].report_id == 0) { + // Simple report without report ID as 1st byte + rpt_info = &rpt_info_arr[0]; + } else { + // Composite report, 1st byte is report ID, data starts from 2nd byte + uint8_t const rpt_id = report[0]; + + // Find report id in the array + for (uint8_t i = 0; i < rpt_count; i++) { + if (rpt_id == rpt_info_arr[i].report_id) { + rpt_info = &rpt_info_arr[i]; + break; + } + } + + report++; + len--; + } + + if (!rpt_info) { + printf("Couldn't find report info !\r\n"); + return; + } + + // For complete list of Usage Page & Usage checkout src/class/hid/hid.h. For examples: + // - Keyboard : Desktop, Keyboard + // - Mouse : Desktop, Mouse + // - Gamepad : Desktop, Gamepad + // - Consumer Control (Media Key) : Consumer, Consumer Control + // - System Control (Power key) : Desktop, System Control + // - Generic (vendor) : 0xFFxx, xx + if (rpt_info->usage_page == HID_USAGE_PAGE_DESKTOP) { + switch (rpt_info->usage) { + case HID_USAGE_DESKTOP_KEYBOARD: + TU_LOG1("HID receive keyboard report\r\n"); + // Assume keyboard follow boot report layout + process_kbd_report((hid_keyboard_report_t const *) report); + break; + + case HID_USAGE_DESKTOP_MOUSE: + TU_LOG1("HID receive mouse report\r\n"); + // Assume mouse follow boot report layout + process_mouse_report((hid_mouse_report_t const *) report); + break; + + default: + break; + } + } +} |