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
95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
#include "led_display.h"
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#include "usb_composite_device.h"
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static usb_basic_keyboard_report_t usbBasicKeyboardReports[2];
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uint32_t UsbBasicKeyboardActionCounter;
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usb_basic_keyboard_report_t* ActiveUsbBasicKeyboardReport = usbBasicKeyboardReports;
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volatile bool IsUsbBasicKeyboardReportSent = false;
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static uint8_t usbBasicKeyboardInBuffer[USB_BASIC_KEYBOARD_REPORT_LENGTH];
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static usb_basic_keyboard_report_t* getInactiveUsbBasicKeyboardReport(void)
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{
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return ActiveUsbBasicKeyboardReport == usbBasicKeyboardReports ? usbBasicKeyboardReports+1 : usbBasicKeyboardReports;
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}
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void SwitchActiveUsbBasicKeyboardReport(void)
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{
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ActiveUsbBasicKeyboardReport = getInactiveUsbBasicKeyboardReport();
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}
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void ResetActiveUsbBasicKeyboardReport(void)
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{
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bzero(ActiveUsbBasicKeyboardReport, USB_BASIC_KEYBOARD_REPORT_LENGTH);
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}
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static usb_status_t UsbBasicKeyboardAction(void)
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{
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usb_status_t status = USB_DeviceHidSend(
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UsbCompositeDevice.basicKeyboardHandle, USB_BASIC_KEYBOARD_ENDPOINT_INDEX,
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(uint8_t*)getInactiveUsbBasicKeyboardReport(), USB_BASIC_KEYBOARD_REPORT_LENGTH);
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IsUsbBasicKeyboardReportSent = true;
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UsbBasicKeyboardActionCounter++;
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return status;
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}
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usb_status_t UsbBasicKeyboardCallback(class_handle_t handle, uint32_t event, void *param)
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{
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usb_status_t error = kStatus_USB_Error;
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switch (event) {
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case kUSB_DeviceHidEventSendResponse:
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if (UsbCompositeDevice.attach) {
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return UsbBasicKeyboardAction();
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}
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break;
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case kUSB_DeviceHidEventGetReport:
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error = kStatus_USB_InvalidRequest;
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break;
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case kUSB_DeviceHidEventSetReport: {
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usb_device_hid_report_struct_t *report = (usb_device_hid_report_struct_t*)param;
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if (report->reportType == USB_DEVICE_HID_REQUEST_GET_REPORT_TYPE_OUPUT && report->reportId == 0 && report->reportLength == 1) {
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LedDisplay_SetIcon(LedDisplayIcon_CapsLock, report->reportBuffer[0] & HID_KEYBOARD_LED_CAPSLOCK);
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error = kStatus_USB_Success;
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} else {
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error = kStatus_USB_InvalidRequest;
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}
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break;
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}
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case kUSB_DeviceHidEventRequestReportBuffer: {
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usb_device_hid_report_struct_t *report = (usb_device_hid_report_struct_t*)param;
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if (report->reportLength <= USB_BASIC_KEYBOARD_REPORT_LENGTH) {
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report->reportBuffer = usbBasicKeyboardInBuffer;
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error = kStatus_USB_Success;
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} else {
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error = kStatus_USB_InvalidRequest;
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}
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break;
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}
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case kUSB_DeviceHidEventGetIdle:
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case kUSB_DeviceHidEventGetProtocol:
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case kUSB_DeviceHidEventSetIdle:
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case kUSB_DeviceHidEventSetProtocol:
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break;
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default:
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break;
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}
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return error;
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}
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usb_status_t UsbBasicKeyboardSetConfiguration(class_handle_t handle, uint8_t configuration)
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{
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if (USB_COMPOSITE_CONFIGURATION_INDEX == configuration) {
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return UsbBasicKeyboardAction();
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}
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return kStatus_USB_Error;
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}
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usb_status_t UsbBasicKeyboardSetInterface(class_handle_t handle, uint8_t interface, uint8_t alternateSetting)
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{
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if (USB_BASIC_KEYBOARD_INTERFACE_INDEX == interface) {
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return UsbBasicKeyboardAction();
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}
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return kStatus_USB_Error;
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}
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