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NetServices/drv/usb/usb_mem.c@0:05ccbd4f84f1, 2013-12-02 (annotated)

Committer:
hendrikvincent
Date:
Mon Dec 02 09:01:23 2013 +0000
Revision:
0:05ccbd4f84f1
eerste programma;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hendrikvincent 0:05ccbd4f84f1 1
hendrikvincent 0:05ccbd4f84f1 2 /*
hendrikvincent 0:05ccbd4f84f1 3 Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
hendrikvincent 0:05ccbd4f84f1 4
hendrikvincent 0:05ccbd4f84f1 5 Permission is hereby granted, free of charge, to any person obtaining a copy
hendrikvincent 0:05ccbd4f84f1 6 of this software and associated documentation files (the "Software"), to deal
hendrikvincent 0:05ccbd4f84f1 7 in the Software without restriction, including without limitation the rights
hendrikvincent 0:05ccbd4f84f1 8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
hendrikvincent 0:05ccbd4f84f1 9 copies of the Software, and to permit persons to whom the Software is
hendrikvincent 0:05ccbd4f84f1 10 furnished to do so, subject to the following conditions:
hendrikvincent 0:05ccbd4f84f1 11
hendrikvincent 0:05ccbd4f84f1 12 The above copyright notice and this permission notice shall be included in
hendrikvincent 0:05ccbd4f84f1 13 all copies or substantial portions of the Software.
hendrikvincent 0:05ccbd4f84f1 14
hendrikvincent 0:05ccbd4f84f1 15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
hendrikvincent 0:05ccbd4f84f1 16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
hendrikvincent 0:05ccbd4f84f1 17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
hendrikvincent 0:05ccbd4f84f1 18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
hendrikvincent 0:05ccbd4f84f1 19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
hendrikvincent 0:05ccbd4f84f1 20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
hendrikvincent 0:05ccbd4f84f1 21 THE SOFTWARE.
hendrikvincent 0:05ccbd4f84f1 22 */
hendrikvincent 0:05ccbd4f84f1 23
hendrikvincent 0:05ccbd4f84f1 24 #include "usb_mem.h"
hendrikvincent 0:05ccbd4f84f1 25
hendrikvincent 0:05ccbd4f84f1 26 #include "string.h" //For memcpy, memmove, memset
hendrikvincent 0:05ccbd4f84f1 27
hendrikvincent 0:05ccbd4f84f1 28 #include "netCfg.h"
hendrikvincent 0:05ccbd4f84f1 29 #if NET_USB
hendrikvincent 0:05ccbd4f84f1 30
hendrikvincent 0:05ccbd4f84f1 31 #define EDS_COUNT 4
hendrikvincent 0:05ccbd4f84f1 32 #define TDS_COUNT 8
hendrikvincent 0:05ccbd4f84f1 33
hendrikvincent 0:05ccbd4f84f1 34 #define HCCA_SIZE 0x100
hendrikvincent 0:05ccbd4f84f1 35 #define ED_SIZE 0x10
hendrikvincent 0:05ccbd4f84f1 36 #define TD_SIZE 0x10
hendrikvincent 0:05ccbd4f84f1 37
hendrikvincent 0:05ccbd4f84f1 38 #define TOTAL_SIZE (HCCA_SIZE + (EDS_COUNT*ED_SIZE) + (TDS_COUNT*TD_SIZE))
hendrikvincent 0:05ccbd4f84f1 39
hendrikvincent 0:05ccbd4f84f1 40
hendrikvincent 0:05ccbd4f84f1 41 static volatile __align(256) byte usb_buf[TOTAL_SIZE] __attribute((section("AHBSRAM1"),aligned)); //256 bytes aligned!
hendrikvincent 0:05ccbd4f84f1 42
hendrikvincent 0:05ccbd4f84f1 43 static volatile byte* usb_hcca; //256 bytes aligned!
hendrikvincent 0:05ccbd4f84f1 44
hendrikvincent 0:05ccbd4f84f1 45 static volatile byte* usb_edBuf; //4 bytes aligned!
hendrikvincent 0:05ccbd4f84f1 46 static volatile byte* usb_tdBuf; //4 bytes aligned!
hendrikvincent 0:05ccbd4f84f1 47
hendrikvincent 0:05ccbd4f84f1 48 static byte usb_edBufAlloc[EDS_COUNT] __attribute((section("AHBSRAM1"),aligned));
hendrikvincent 0:05ccbd4f84f1 49 static byte usb_tdBufAlloc[TDS_COUNT] __attribute((section("AHBSRAM1"),aligned));
hendrikvincent 0:05ccbd4f84f1 50
hendrikvincent 0:05ccbd4f84f1 51 void usb_mem_init()
hendrikvincent 0:05ccbd4f84f1 52 {
hendrikvincent 0:05ccbd4f84f1 53 usb_hcca = usb_buf;
hendrikvincent 0:05ccbd4f84f1 54 usb_edBuf = usb_buf + HCCA_SIZE;
hendrikvincent 0:05ccbd4f84f1 55 usb_tdBuf = usb_buf + HCCA_SIZE + (EDS_COUNT*ED_SIZE);
hendrikvincent 0:05ccbd4f84f1 56 memset(usb_edBufAlloc, 0, EDS_COUNT);
hendrikvincent 0:05ccbd4f84f1 57 memset(usb_tdBufAlloc, 0, TDS_COUNT);
hendrikvincent 0:05ccbd4f84f1 58 }
hendrikvincent 0:05ccbd4f84f1 59
hendrikvincent 0:05ccbd4f84f1 60 volatile byte* usb_get_hcca()
hendrikvincent 0:05ccbd4f84f1 61 {
hendrikvincent 0:05ccbd4f84f1 62 return usb_hcca;
hendrikvincent 0:05ccbd4f84f1 63 }
hendrikvincent 0:05ccbd4f84f1 64
hendrikvincent 0:05ccbd4f84f1 65 volatile byte* usb_get_ed()
hendrikvincent 0:05ccbd4f84f1 66 {
hendrikvincent 0:05ccbd4f84f1 67 int i;
hendrikvincent 0:05ccbd4f84f1 68 for(i = 0; i < EDS_COUNT; i++)
hendrikvincent 0:05ccbd4f84f1 69 {
hendrikvincent 0:05ccbd4f84f1 70 if( !usb_edBufAlloc[i] )
hendrikvincent 0:05ccbd4f84f1 71 {
hendrikvincent 0:05ccbd4f84f1 72 usb_edBufAlloc[i] = 1;
hendrikvincent 0:05ccbd4f84f1 73 return usb_edBuf + i*ED_SIZE;
hendrikvincent 0:05ccbd4f84f1 74 }
hendrikvincent 0:05ccbd4f84f1 75 }
hendrikvincent 0:05ccbd4f84f1 76 return NULL; //Could not alloc ED
hendrikvincent 0:05ccbd4f84f1 77 }
hendrikvincent 0:05ccbd4f84f1 78
hendrikvincent 0:05ccbd4f84f1 79 volatile byte* usb_get_td()
hendrikvincent 0:05ccbd4f84f1 80 {
hendrikvincent 0:05ccbd4f84f1 81 int i;
hendrikvincent 0:05ccbd4f84f1 82 for(i = 0; i < TDS_COUNT; i++)
hendrikvincent 0:05ccbd4f84f1 83 {
hendrikvincent 0:05ccbd4f84f1 84 if( !usb_tdBufAlloc[i] )
hendrikvincent 0:05ccbd4f84f1 85 {
hendrikvincent 0:05ccbd4f84f1 86 usb_tdBufAlloc[i] = 1;
hendrikvincent 0:05ccbd4f84f1 87 return usb_tdBuf + i*TD_SIZE;
hendrikvincent 0:05ccbd4f84f1 88 }
hendrikvincent 0:05ccbd4f84f1 89 }
hendrikvincent 0:05ccbd4f84f1 90 return NULL; //Could not alloc TD
hendrikvincent 0:05ccbd4f84f1 91 }
hendrikvincent 0:05ccbd4f84f1 92
hendrikvincent 0:05ccbd4f84f1 93 void usb_free_ed(volatile byte* ed)
hendrikvincent 0:05ccbd4f84f1 94 {
hendrikvincent 0:05ccbd4f84f1 95 int i;
hendrikvincent 0:05ccbd4f84f1 96 i = (ed - usb_edBuf) / ED_SIZE;
hendrikvincent 0:05ccbd4f84f1 97 usb_edBufAlloc[i] = 0;
hendrikvincent 0:05ccbd4f84f1 98 }
hendrikvincent 0:05ccbd4f84f1 99
hendrikvincent 0:05ccbd4f84f1 100 void usb_free_td(volatile byte* td)
hendrikvincent 0:05ccbd4f84f1 101 {
hendrikvincent 0:05ccbd4f84f1 102 int i;
hendrikvincent 0:05ccbd4f84f1 103 i = (td - usb_tdBuf) / TD_SIZE;
hendrikvincent 0:05ccbd4f84f1 104 usb_tdBufAlloc[i] = 0;
hendrikvincent 0:05ccbd4f84f1 105 }
hendrikvincent 0:05ccbd4f84f1 106
hendrikvincent 0:05ccbd4f84f1 107
hendrikvincent 0:05ccbd4f84f1 108 #endif