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114 lines
3.2 KiB
114 lines
3.2 KiB
#include "class_hid.h"
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#include "class_hid_keyboard.h"
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#include <critical-section.h>
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#include <dev_transfers.h>
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#include <print.h>
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#include <stdint.h>
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#include <usb_state.h>
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static device_config_keyboard *keyboard_config = 0;
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extern bool caps_lock_engaged;
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void keyboard_init(void) {
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uint8_t index = 1;
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keyboard_config = NULL;
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do {
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keyboard_config = (device_config_keyboard *)get_usb_device_config(index);
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if (keyboard_config == NULL)
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break;
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const usb_device_type t = keyboard_config->type;
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if (t == USB_IS_KEYBOARD) {
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print_string("\r\nUSB: KEYBOARD @ $");
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print_uint16(index);
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print_string(" $");
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hid_set_protocol(keyboard_config, 1);
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hid_set_idle(keyboard_config, 0x80);
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return;
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}
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} while (++index != MAX_NUMBER_OF_DEVICES + 1);
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print_string("\r\nUSB: KEYBOARD: NOT FOUND$");
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}
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#define KEYBOARD_BUFFER_SIZE 8
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#define KEYBOARD_BUFFER_SIZE_MASK 7
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typedef struct {
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uint8_t modifier_keys;
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uint8_t key_code;
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} keyboard_event;
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keyboard_event buffer[KEYBOARD_BUFFER_SIZE] = {{0}};
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uint8_t write_index = 0;
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uint8_t read_index = 0;
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uint8_t previous_keyCodes[6] = {0};
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void keyboard_buf_put(const uint8_t modifier_keys, const uint8_t key_code) {
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if (key_code >= 0x80 || key_code == 0)
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return; // ignore ???
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// if already reported, just skip it
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for (uint8_t i = 0; i < 6; i++)
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if (previous_keyCodes[i] == key_code)
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return;
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uint8_t next_write_index = (write_index + 1) & KEYBOARD_BUFFER_SIZE_MASK;
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if (next_write_index != read_index) { // Check if buffer is not full
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buffer[write_index].modifier_keys = modifier_keys;
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buffer[write_index].key_code = key_code;
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write_index = next_write_index;
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}
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}
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uint8_t keyboard_buf_size() __sdcccall(1) {
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if (write_index >= read_index)
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return write_index - read_index;
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return KEYBOARD_BUFFER_SIZE - read_index + write_index;
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}
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uint32_t keyboard_buf_get_next() {
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if (write_index == read_index) // Check if buffer is empty
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return 255 << 8;
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const uint8_t modifier_key = buffer[read_index].modifier_keys;
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const uint8_t key_code = buffer[read_index].key_code;
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read_index = (read_index + 1) & KEYBOARD_BUFFER_SIZE_MASK;
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if (key_code == KEY_CODE_CAPS_LOCK) {
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caps_lock_engaged = !caps_lock_engaged;
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return keyboard_buf_get_next();
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}
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const unsigned char c = scancode_to_char(modifier_key, key_code);
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/* D = modifier, e-> char, H = 0, L=>code */
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return (uint32_t)modifier_key << 24 | (uint32_t)c << 16 | key_code;
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}
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void keyboard_buf_flush() {
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write_index = 0;
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read_index = 0;
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}
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uint8_t active = 0;
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keyboard_report report = {0};
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void keyboard_tick(void) {
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if (is_in_critical_section())
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return;
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ch_configure_nak_retry_disable();
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result = usbdev_dat_in_trnsfer_0((device_config *)keyboard_config, (uint8_t *)report, 8);
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ch_configure_nak_retry_3s();
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if (result == 0)
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for (uint8_t i = 0; i < 6; i++) {
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keyboard_buf_put(report.bModifierKeys, report.keyCode[i]);
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previous_keyCodes[i] = report.keyCode[i];
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}
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}
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