diff options
Diffstat (limited to 'examples/device/printer_to_hid/src/main.c')
| -rw-r--r-- | examples/device/printer_to_hid/src/main.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/examples/device/printer_to_hid/src/main.c b/examples/device/printer_to_hid/src/main.c deleted file mode 100644 index 0d14147b4..000000000 --- a/examples/device/printer_to_hid/src/main.c +++ /dev/null @@ -1,175 +0,0 @@ -/* - * The MIT License (MIT) - * - * Copyright (c) 2026 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 <stdlib.h> -#include <stdio.h> -#include <string.h> - -#include "bsp/board_api.h" -#include "tusb.h" - -#include "usb_descriptors.h" - -// -------------------------------------------------------------------+ -// Variables -// -------------------------------------------------------------------+ - -// next keycode to send on usb/hid -static uint8_t next_keycode = 0; -// next key modifiers to send on usb/hid -static uint8_t next_modifiers = 0; -// whether the next usb/hid report must be NULL to release the last keystroke -static bool next_keycode_is_release = false; - - -// -------------------------------------------------------------------+ -// Tasks -// -------------------------------------------------------------------+ - -// Every 10ms, we will place HID data in the usb/hid endpoint, ready to -// sent to the host when required. The tasks will read the keycode in -// next_keycode and place it in the HID report, then set next_is_null -// such that the key is released by the next report. This seem to help -// stroking the same key twice when the character is repeated in the data. -static void hid_tx_task(void) { - // Poll every 10ms - const uint32_t interval_ms = 10; - static uint32_t start_ms = 0; - - if (!tud_hid_ready()) { - return; - } - - if (tusb_time_millis_api() - start_ms < interval_ms) { - return; // not enough time - } - start_ms += interval_ms; - - if (next_keycode_is_release || next_keycode == 0) { - tud_hid_keyboard_report(1, 0, NULL); - next_keycode_is_release = false; - return; - } - - uint8_t keycode_array[6] = {0}; - keycode_array[0] = next_keycode; - tud_hid_keyboard_report(1, next_modifiers, keycode_array); - next_keycode_is_release = true; - next_keycode = 0; -} - -// Read one byte from printer FIFO and translate to HID keycode. -// Only a-zA-Z0-9 are translated; everything else becomes space. -static void printer_to_hid_task(void) { - if (next_keycode != 0) { - return; // previous key not yet sent - } - - uint8_t ch; - if (tud_printer_read(&ch, 1) == 0) { - return; // no data available - } - - uint8_t m = 0; - if ('a' <= ch && ch <= 'z') { - ch = (uint8_t)(ch - 'a' + HID_KEY_A); - } else if ('A' <= ch && ch <= 'Z') { - ch = (uint8_t)(ch - 'A' + HID_KEY_A); - m = KEYBOARD_MODIFIER_LEFTSHIFT; - } else if ('1' <= ch && ch <= '9') { - ch = (uint8_t)(ch - '1' + HID_KEY_1); - } else if (ch == '0') { - ch = HID_KEY_0; - } else { - ch = HID_KEY_SPACE; - } - - next_keycode = ch; - next_modifiers = m; -} - -int main(void) { - board_init(); - // init device and host stack on configured roothub port - tusb_rhport_init_t dev_init = {.role = TUSB_ROLE_DEVICE, .speed = TUSB_SPEED_AUTO}; - tusb_init(BOARD_TUD_RHPORT, &dev_init); - board_init_after_tusb(); - - while (1) { - tud_task(); // tinyusb device task - printer_to_hid_task(); // read printer data and translate to HID keycodes - hid_tx_task(); // send keycodes to host via HID - } -} - - -//--------------------------------------------------------------------+ -// Printer callbacks -//--------------------------------------------------------------------+ - -void tud_printer_rx_cb(uint8_t itf) { - (void)itf; -} - -// IEEE 1284 Device ID: first 2 bytes are big-endian total length (including the 2 length bytes). -// The rest is the Device ID string using standard abbreviated keys. -static const char printer_device_id[] = - "\x00\x34" // total length = 52 = 0x0034 (big-endian) - "MFG:TinyUSB;" - "MDL:Printer to HID;" - "CMD:PS;" - "CLS:PRINTER;"; - -TU_VERIFY_STATIC(sizeof(printer_device_id) - 1 == 52, "device ID length mismatch"); - -uint8_t const *tud_printer_get_device_id_cb(uint8_t itf) { - (void)itf; - return (uint8_t const *)printer_device_id; -} - - -//--------------------------------------------------------------------+ -// HID callbacks -//--------------------------------------------------------------------+ - -uint16_t tud_hid_get_report_cb(uint8_t instance, uint8_t report_id, hid_report_type_t report_type, uint8_t *buffer, - uint16_t reqlen) { - (void)instance; - (void)report_id; - (void)report_type; - (void)buffer; - (void)reqlen; - return 0; -} - -void tud_hid_set_report_cb(uint8_t instance, uint8_t report_id, hid_report_type_t report_type, const uint8_t *buffer, - uint16_t bufsize) { - (void)instance; - (void)report_id; - (void)report_type; - (void)buffer; - (void)bufsize; - return; -} |