82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
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#include <device.h>
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#include <usb/usb_device.h>
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#include <usb/class/usb_hid.h>
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LOG_MODULE_REGISTER(zmk_usb_hid, CONFIG_ZMK_USB_HID_LOG_LEVEL);
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static const u8_t hid_report_desc[] = HID_KEYBOARD_REPORT_DESC();
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static enum usb_dc_status_code usb_status;
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static struct device *hid_dev;
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static u8_t report[8] = { 0x00, 0x00 };
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#define KEY_OFFSET 0x02
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#define MAX_KEYS 6
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int zmk_usb_hid_press_key(enum hid_kbd_code code)
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{
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if (usb_status == USB_DC_SUSPEND) {
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return usb_wakeup_request();
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}
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for (int idx = 0; idx < MAX_KEYS; idx++) {
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if (report[idx + KEY_OFFSET] != 0U) {
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continue;
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}
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report[idx + KEY_OFFSET] = code;
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return hid_int_ep_write(hid_dev, report, sizeof(report), NULL);
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}
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return -EINVAL;
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}
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int zmk_usb_hid_release_key(enum hid_kbd_code code)
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{
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for (int idx = 0; idx < MAX_KEYS; idx++) {
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if (report[idx + KEY_OFFSET] != code) {
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continue;
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}
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report[idx + KEY_OFFSET] = 0U;
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return hid_int_ep_write(hid_dev, report, sizeof(report), NULL);
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}
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return -EINVAL;
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}
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void usb_hid_status_cb(enum usb_dc_status_code status, const u8_t *params)
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{
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usb_status = status;
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};
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int zmk_usb_hid_init()
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{
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int usb_enable_ret;
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hid_dev = device_get_binding("HID_0");
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if (hid_dev == NULL) {
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LOG_ERR("Unable to locate HID device");
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return -EINVAL;
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}
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usb_hid_register_device(hid_dev,
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hid_report_desc, sizeof(hid_report_desc),
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NULL);
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usb_hid_init(hid_dev);
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usb_enable_ret = usb_enable(usb_hid_status_cb);
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if (usb_enable_ret != 0) {
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LOG_ERR("Unable to enable USB");
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return -EINVAL;
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}
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return 0;
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}
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