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Diffstat (limited to 'examples/host/src/keyboard_host_app.c')
| -rw-r--r-- | examples/host/src/keyboard_host_app.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/examples/host/src/keyboard_host_app.c b/examples/host/src/keyboard_host_app.c new file mode 100644 index 000000000..f0d2fcd73 --- /dev/null +++ b/examples/host/src/keyboard_host_app.c @@ -0,0 +1,176 @@ +/**************************************************************************/ +/*! + @file keyboard_host_app.c + @author hathach (tinyusb.org) + + @section LICENSE + + Software License Agreement (BSD License) + + Copyright (c) 2013, hathach (tinyusb.org) + All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions are met: + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + 2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + 3. Neither the name of the copyright holders nor the + names of its contributors may be used to endorse or promote products + derived from this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY + EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY + DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND + ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + + This file is part of the tinyusb stack. +*/ +/**************************************************************************/ + +//--------------------------------------------------------------------+ +// INCLUDE +//--------------------------------------------------------------------+ +#include "keyboard_host_app.h" +#include "app_os_prio.h" + +#if TUSB_CFG_HOST_HID_KEYBOARD + +//--------------------------------------------------------------------+ +// MACRO CONSTANT TYPEDEF +//--------------------------------------------------------------------+ +#define QUEUE_KEYBOARD_REPORT_DEPTH 4 + +//--------------------------------------------------------------------+ +// INTERNAL OBJECT & FUNCTION DECLARATION +//--------------------------------------------------------------------+ +static osal_queue_t queue_kbd_hdl; +TUSB_CFG_ATTR_USBRAM static hid_keyboard_report_t usb_keyboard_report; + +static inline uint8_t keycode_to_ascii(uint8_t modifier, uint8_t keycode) ATTR_CONST ATTR_ALWAYS_INLINE; +static inline void process_kbd_report(hid_keyboard_report_t const * report); + +//--------------------------------------------------------------------+ +// tinyusb callbacks +//--------------------------------------------------------------------+ +void tuh_hid_keyboard_mounted_cb(uint8_t dev_addr) +{ + // application set-up + printf("\na Keyboard device (address %d) is mounted\n", dev_addr); + + osal_queue_flush(queue_kbd_hdl); + tuh_hid_keyboard_get_report(dev_addr, (uint8_t*) &usb_keyboard_report); // first report +} + +void tuh_hid_keyboard_unmounted_cb(uint8_t dev_addr) +{ + // application tear-down + printf("\na Keyboard device (address %d) is unmounted\n", dev_addr); +} + +// invoked ISR context +void tuh_hid_keyboard_isr(uint8_t dev_addr, tusb_event_t event) +{ + switch(event) + { + case TUSB_EVENT_XFER_COMPLETE: + osal_queue_send(queue_kbd_hdl, &usb_keyboard_report); + tuh_hid_keyboard_get_report(dev_addr, (uint8_t*) &usb_keyboard_report); + break; + + case TUSB_EVENT_XFER_ERROR: + tuh_hid_keyboard_get_report(dev_addr, (uint8_t*) &usb_keyboard_report); // ignore & continue + break; + + default : + break; + } +} + +//--------------------------------------------------------------------+ +// APPLICATION +//--------------------------------------------------------------------+ +void keyboard_host_app_init(void) +{ + memclr_(&usb_keyboard_report, sizeof(hid_keyboard_report_t)); + + queue_kbd_hdl = osal_queue_create( QUEUE_KEYBOARD_REPORT_DEPTH, sizeof(hid_keyboard_report_t) ); + ASSERT_PTR( queue_kbd_hdl, VOID_RETURN ); + + VERIFY( osal_task_create(keyboard_host_app_task, "kbd", 128, NULL, KEYBOARD_APP_TASK_PRIO), ); +} + +//------------- main task -------------// +void keyboard_host_app_task(void* param) +{ + (void) param; + + OSAL_TASK_BEGIN + + hid_keyboard_report_t kbd_report; + tusb_error_t error; + + osal_queue_receive(queue_kbd_hdl, &kbd_report, OSAL_TIMEOUT_WAIT_FOREVER, &error); + (void) error; // suppress compiler warning + + process_kbd_report(&kbd_report); + + OSAL_TASK_END +} + +//--------------------------------------------------------------------+ +// HELPER +//--------------------------------------------------------------------+ +// look up new key in previous keys +static inline bool find_key_in_report(hid_keyboard_report_t const *p_report, uint8_t keycode) +{ + for(uint8_t i=0; i<6; i++) + { + if (p_report->keycode[i] == keycode) return true; + } + + return false; +} + +static inline void process_kbd_report(hid_keyboard_report_t const *p_new_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 ( p_new_report->keycode[i] ) + { + if ( find_key_in_report(&prev_report, p_new_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 + uint8_t ch = keycode_to_ascii(p_new_report->modifier, p_new_report->keycode[i]); + putchar(ch); + if ( ch == '\r' ) putchar('\n'); // added new line for enter key + } + } + // TODO example skips key released + } + + prev_report = *p_new_report; +} + +static inline uint8_t keycode_to_ascii(uint8_t modifier, uint8_t keycode) +{ + // TODO max of keycode_ascii_tbl + return keycode > 128 ? 0 : + hid_keycode_to_ascii_tbl [modifier & (KEYBOARD_MODIFIER_LEFTSHIFT | KEYBOARD_MODIFIER_RIGHTSHIFT) ? 1 : 0] [keycode]; +} + +#endif |