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usbcdc: i don't trust these ring buffers...

This commit is contained in:
schneider 2011-12-11 00:20:38 +01:00
parent 29efa4cae9
commit ba930408f6
1 changed files with 11 additions and 6 deletions
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17
firmware/usbcdc/cdcuser.c
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@ -25,6 +25,8 @@
#include "usbcore.h"
#include "cdc.h"
#include "cdcuser.h"
#include "usbreg.h"
unsigned char BulkBufIn [64]; // Buffer to store USB IN packet
unsigned char BulkBufOut [64]; // Buffer to store USB OUT packet
@ -149,19 +151,23 @@ int CDC_WrInBuf (const char *buffer, int *length)
bytesToWrite = *length;
bytesWritten = bytesToWrite;
//Just block if we can't write all at once
while( CDC_BUF_SIZE - CDC_BUF_COUNT(CDC_InBuf) < bytesToWrite );
// Just block if we can't write all at once
// These ringbuffers smell buggy, so +1
while( CDC_BUF_SIZE - CDC_BUF_COUNT(CDC_InBuf) < bytesToWrite+1 );
//uint8_t flush = CDC_DepInEmpty;
USB_DEVINTEN = 0;
while (bytesToWrite--) {
CDC_BUF_WR(CDC_InBuf, *buffer++); // Copy Data to buffer
}
//if( flush == 1 ){
if( CDC_DepInEmpty && CDC_BUF_COUNT(CDC_InBuf) ){
//if( CDC_DepInEmpty && CDC_BUF_COUNT(CDC_InBuf) ){
if( CDC_DepInEmpty ){
CDC_DepInEmpty = 0;
gpioSetValue (RB_LED2, 0);
CDC_BulkIn();
CDC_BulkIn();
}
USB_DEVINTEN = DEV_STAT_INT | (0xFF<<1) | (USB_SOF_EVENT ? FRAME_INT : 0);
return (bytesWritten);
}
@ -327,7 +333,6 @@ uint32_t CDC_SendBreak (unsigned short wDurationOfBreak) {
return (TRUE);
}
/*----------------------------------------------------------------------------
CDC_BulkIn call on DataIn Request
Parameters: none