e12e219b4e
* Global variables shared between an interrupt and the main code should be volatile See: https://www.embedded.com/electronics-blogs/beginner-s-corner/4023801/Introduction-to-the-Volatile-Keyword * There is no reason to change the active report if it has not changed * Declare local functions and variables static This both helps the compiler and the programmer
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
#ifndef __USB_INTERFACE_MEDIA_KEYBOARD_H__
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#define __USB_INTERFACE_MEDIA_KEYBOARD_H__
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// Includes:
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#include "fsl_common.h"
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#include "usb_api.h"
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#include "usb_descriptors/usb_descriptor_media_keyboard_report.h"
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// Macros:
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#define USB_MEDIA_KEYBOARD_INTERFACE_INDEX 2
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#define USB_MEDIA_KEYBOARD_INTERFACE_COUNT 1
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#define USB_MEDIA_KEYBOARD_ENDPOINT_INDEX 4
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#define USB_MEDIA_KEYBOARD_ENDPOINT_COUNT 1
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#define USB_MEDIA_KEYBOARD_INTERRUPT_IN_PACKET_SIZE 8
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#define USB_MEDIA_KEYBOARD_INTERRUPT_IN_INTERVAL 4
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#define USB_MEDIA_KEYBOARD_REPORT_LENGTH 8
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// Typedefs:
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typedef struct {
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uint16_t scancodes[USB_MEDIA_KEYBOARD_MAX_KEYS];
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} ATTR_PACKED usb_media_keyboard_report_t;
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// Variables:
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extern volatile bool IsUsbMediaKeyboardReportSent;
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extern uint32_t UsbMediaKeyboardActionCounter;
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extern usb_media_keyboard_report_t* ActiveUsbMediaKeyboardReport;
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// Functions:
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usb_status_t UsbMediaKeyboardCallback(class_handle_t handle, uint32_t event, void *param);
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usb_status_t UsbMediaKeyboardSetConfiguration(class_handle_t handle, uint8_t configuration);
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usb_status_t UsbMediaKeyboardSetInterface(class_handle_t handle, uint8_t interface, uint8_t alternateSetting);
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void ResetActiveUsbMediaKeyboardReport(void);
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void SwitchActiveUsbMediaKeyboardReport(void);
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#endif
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