// TITLE: Main header file for the USB Library
#pragma once
#include <stdint.h> // uint32_t
#include <inc/hw_types.h> // uint8_t
#include <inc/hw_memmap.h> // USBA_BASE
#ifdef __TMS320C28XX__
#define INT_USB INT_USBA // USB Define for C28x.
#define USB_BASE USBA_BASE // USB Define for C28x.
#else
#define INT_USB INT_USB0 // USB Define for CM.
#define USB_BASE USB0_BASE // USB Define for C28x.
#endif
namespace usb{
// USB-Request als Byte-struct erspart Alignment-Probleme
struct tRequest{
uint8_t bmRequestType,// Determines the type and direction of the request.
bRequest, // Identifies the specific request being made.
wValueL, wValueH, // Word-sized field that varies according to the request.
wIndexL, wIndexH, // Word-sized field that varies according to the request.
wLengthL, wLengthH; // The number of bytes to transfer if there is a data stage to the request.
uint16_t wRequest() const {return bRequest<<8|bmRequestType;}
uint16_t wValue() const {return wValueH<<8|wValueL;}
uint16_t wIndex() const {return wIndexH<<8|wIndexL;}
uint16_t wLength() const {return wLengthH<<8|wLengthL;}
void limitLength(unsigned&l) const {if (l>wLength()) l=wLength();}
void limitLength(volatile unsigned&l) const {if (l>wLength()) l=wLength();}
operator uint8_t*() {return &bmRequestType;}
};
}
// Generate two-byte, three-byte, and four-byte value for USB descriptors
#define USB2(v) (v) & 0xff, (v) >> 8
#define USB3(v) USB2((v)&0xFFFF), (v)>> 16
#define USB4(v) USB2((v)&0xFFFF), USB2((v)>>16)
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