为什么我的USB键盘不能工作？

用cypress的开发板做了一个USB键盘
我原本以为运行后就能够象ps2键盘一样工作
结果计算机上没有任何动静
我想发的数据倒是发送成功了
难道键盘还需要驱动么？我认为是不要的
至少win2000和98se不要
整个firmware是在cypress的fw下改出来的
请大家帮我看一下，是firmware没写对还是我对USB键盘的理解有问题
谢谢了
以下是我的发送代码
void TD_Poll(void) // Called repeatedly while the device is idle
{
BYTE count, i;

if( !(EPIO[IN1BUF_ID].cntrl & bmEPBUSY) ) // Is the IN2BUF available,
{
// Then loopback the data
for(i=0;i<8;++i)
IN1BUF = 0;


if(led_num==0)
IN1BUF[2]=0x04;//我想连续发送a键

EPIO[IN1BUF_ID].bytes =8;

}
led_num++;//这个循环一定次数后发送一次a键
}
以下是设置和Report
IntrfcDscr:
db IntrfcDscrEnd-IntrfcDscr ;; Descriptor length
db DSCR_INTRFC ;; Descriptor type
db 0 ;; Zero-based index of this interface
db 0 ;; Alternate setting
db 1 ;; Number of end points
db 03H ;; Interface class
db 01H ;; Interface sub class
db 01H ;; Interface sub sub class
db 0 ;; Interface descriptor string index
IntrfcDscrEnd:

HIDDscr:
db 9 ;; Length
db 21H ;; Type
db 10H, 01H ;; HID class spec.# compliance (0110 = 1.1)
db 0 ;; Country localization (0=none)
db 1 ;; Number of descriptors to follow (excluding endpoint)
db 22H ;; Descriptor type to follow (report)
db ReportDscrEnd - ReportDscr, 0 ;; Report descriptor length

HIDDscrEnd:

;;EpO2Dscr:
;; db EpO2DscrEnd-EpO2Dscr ;; Descriptor length
;; db DSCR_ENDPNT ;; Descriptor type
;; db 00000010b ;; Endpoint number, and direction
;; db ET_INT ;; Endpoint type
;; db 08H ;; Maximun packet size (LSB)
;; db 00H ;; Max packect size (MSB)
;; db 10 ;; Polling interval
;;EpO2DscrEnd:

EpI1Dscr:
db EpI1DscrEnd-EpI1Dscr ;; Descriptor length
db DSCR_ENDPNT ;; Descriptor type
db 10000001b ;; Endpoint number, and direction
   db ET_INT ;; Endpoint type
db 08H ;; Maximun packet size (LSB)
db 00H ;; Max packect size (MSB)
db 10 ;; Polling interval
EpI1DscrEnd:

EpAllDscrEnd:

ReportDscr:
db 05H, 01H ;; Usage Page (Generic Desktop)
db 09H, 06H ;; Usage (Keyboard)
db 0A1H, 01H ;; Collection (Application)

;; Modifier Byte
db 05H, 07H ;; Usage (Key Codes)
db 19H, 00H ;; Usage Min Modifier Code
db 29H, 0E7H ;; Usage Max Modifier Code
db 15H, 00H ;; Logical minimum (0)
db 25H, 01H ;; Logical maximum (1)
db 75H, 01H ;; Report size (1 bits)
db 95H, 08H ;; Report count (8 fields)
db 81H, 02H ;; Input  modifer byte
;; Reserved Byte
db 95H, 01H ;; Report Count
db 75H, 08H ;; Report Size
db      81H, 01H ;; Input Reserved byte
;;LED byte
db 95h, 05h ;; Report Count;
db 75h, 01h ;; Report Size
db 05h, 08h ;; Usage (page # for LEDs)
db 19h, 01h ;; Usage Min(1)
db 29h, 05h ;; Usage Max(5)
db 91h, 02h ;; Output (Data,Variable,Absolute)
db 95h, 01h ;; Report Size
db 75h, 03h ;; Report Count
db 91h, 01h ;; Output (Constant)
;;Key Arrays (6 bytes)
db 95h, 06h ;; Report Size (6)
db 75h, 08h ;; Report Count(8)
db 15h, 00h ;; Logical Min (0)
db 25h, 65h ;; Logical Max (101)
db 05h, 07h ;; Usage page(Key Codes)
db 19h, 00h ;; Usage Min (0)
db 29h, 65h ;; Usage Max (101)
db 81h, 00h ;; Key Arrays (6 bytes)
;; End Collection (Application)
db 0C0H
ReportDscrEnd:HID