Norimasa Okamoto / Mbed 2 deprecated LPC4088-USBHostC270_example

Simple USBHost WebCam for EA LPC4088 QSB/LPC1768 test program

Dependencies:   LPC4088-USBHost mbed

EA LPC4088 QSB/LPC1768をUSBホストにしてWebカメラからJPEG画像を読み取るテストプログラムです。

The usage is the same as KL46Z-USBHostC270_example.
使い方はKL46Z-USBHostC270_exampleと同じです。
動作確認： Logitech C270,Logitech Q200R(Qcam Orbit AF)
/media/uploads/va009039/lpc4088-c270-480x360.jpg

LPC4088-USBHost/USBHost/BaseUsbHostLib.cpp@0:c972ee42b455, 2014-04-24 (annotated)

Committer:
va009039
Date:
Thu Apr 24 05:38:45 2014 +0000
Revision:
0:c972ee42b455
first commit,sync rev.29.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:c972ee42b455 1 // BaseUsbHostLib.cpp 2014/4/22
va009039 0:c972ee42b455 2 #include "USBHost.h"
va009039 0:c972ee42b455 3 //#define DEBUG
va009039 0:c972ee42b455 4 #include "BaseUsbHostDebug.h"
va009039 0:c972ee42b455 5 #define TEST
va009039 0:c972ee42b455 6 #include "BaseUsbHostTest.h"
va009039 0:c972ee42b455 7
va009039 0:c972ee42b455 8 //#define DBG_USE_POSIX_MEMALIGN
va009039 0:c972ee42b455 9
va009039 0:c972ee42b455 10 #ifdef DBG_USE_POSIX_MEMALIGN
va009039 0:c972ee42b455 11 void* usb_ram_malloc(size_t size, int aligment)
va009039 0:c972ee42b455 12 {
va009039 0:c972ee42b455 13 TEST_ASSERT(aligment >= 4);
va009039 0:c972ee42b455 14 TEST_ASSERT(!(aligment & 3));
va009039 0:c972ee42b455 15 void* p;
va009039 0:c972ee42b455 16 if (posix_memalign(&p, aligment, size) == 0) {
va009039 0:c972ee42b455 17 return p;
va009039 0:c972ee42b455 18 }
va009039 0:c972ee42b455 19 return NULL;
va009039 0:c972ee42b455 20 }
va009039 0:c972ee42b455 21
va009039 0:c972ee42b455 22 void usb_ram_free(void* p)
va009039 0:c972ee42b455 23 {
va009039 0:c972ee42b455 24 free(p);
va009039 0:c972ee42b455 25 }
va009039 0:c972ee42b455 26 #else
va009039 0:c972ee42b455 27
va009039 0:c972ee42b455 28 #define CHUNK_SIZE 64
va009039 0:c972ee42b455 29
va009039 0:c972ee42b455 30 #if defined(TARGET_LPC1768)
va009039 0:c972ee42b455 31 #define USB_RAM_BASE 0x2007C000
va009039 0:c972ee42b455 32 #define USB_RAM_SIZE 0x4000
va009039 0:c972ee42b455 33 #define BLOCK_COUNT (USB_RAM_SIZE/CHUNK_SIZE)
va009039 0:c972ee42b455 34 #elif defined(TARGET_LPC4088)
va009039 0:c972ee42b455 35 #define USB_RAM_BASE 0x20000000
va009039 0:c972ee42b455 36 #define USB_RAM_SIZE 0x4000
va009039 0:c972ee42b455 37 #define BLOCK_COUNT (USB_RAM_SIZE/CHUNK_SIZE)
va009039 0:c972ee42b455 38 #else
va009039 0:c972ee42b455 39 #error "target error"
va009039 0:c972ee42b455 40 #endif
va009039 0:c972ee42b455 41
va009039 0:c972ee42b455 42 static uint8_t* ram = NULL;
va009039 0:c972ee42b455 43 static uint8_t* map;
va009039 0:c972ee42b455 44
va009039 0:c972ee42b455 45 static void usb_ram_init()
va009039 0:c972ee42b455 46 {
va009039 0:c972ee42b455 47 USB_INFO("USB_RAM: 0x%p(%d)", USB_RAM_BASE, USB_RAM_SIZE);
va009039 0:c972ee42b455 48 ram = (uint8_t*)USB_RAM_BASE;
va009039 0:c972ee42b455 49 TEST_ASSERT((int)ram%256 == 0);
va009039 0:c972ee42b455 50 map = (uint8_t*)malloc(BLOCK_COUNT);
va009039 0:c972ee42b455 51 TEST_ASSERT(map);
va009039 0:c972ee42b455 52 memset(map, 0, BLOCK_COUNT);
va009039 0:c972ee42b455 53 }
va009039 0:c972ee42b455 54
va009039 0:c972ee42b455 55 // first fit malloc
va009039 0:c972ee42b455 56 void* usb_ram_malloc(size_t size, int aligment)
va009039 0:c972ee42b455 57 {
va009039 0:c972ee42b455 58 TEST_ASSERT(aligment >= 4);
va009039 0:c972ee42b455 59 TEST_ASSERT(!(aligment & 3));
va009039 0:c972ee42b455 60 if (ram == NULL) {
va009039 0:c972ee42b455 61 usb_ram_init();
va009039 0:c972ee42b455 62 }
va009039 0:c972ee42b455 63 int needs = (size+CHUNK_SIZE-1)/CHUNK_SIZE;
va009039 0:c972ee42b455 64 void* p = NULL;
va009039 0:c972ee42b455 65 for(int idx = 0; idx < BLOCK_COUNT;) {
va009039 0:c972ee42b455 66 bool found = true;
va009039 0:c972ee42b455 67 for(int i = 0; i < needs; i++) {
va009039 0:c972ee42b455 68 int block = map[idx + i];
va009039 0:c972ee42b455 69 if (block != 0) {
va009039 0:c972ee42b455 70 idx += block;
va009039 0:c972ee42b455 71 found = false;
va009039 0:c972ee42b455 72 break;
va009039 0:c972ee42b455 73 }
va009039 0:c972ee42b455 74 }
va009039 0:c972ee42b455 75 if (!found) {
va009039 0:c972ee42b455 76 continue;
va009039 0:c972ee42b455 77 }
va009039 0:c972ee42b455 78 p = ram+idx*CHUNK_SIZE;
va009039 0:c972ee42b455 79 if ((int)p % aligment) {
va009039 0:c972ee42b455 80 idx++;
va009039 0:c972ee42b455 81 continue;
va009039 0:c972ee42b455 82 }
va009039 0:c972ee42b455 83 TEST_ASSERT((idx + needs) <= BLOCK_COUNT);
va009039 0:c972ee42b455 84 for(int i = 0; i < needs; i++) {
va009039 0:c972ee42b455 85 map[idx + i] = needs - i;
va009039 0:c972ee42b455 86 }
va009039 0:c972ee42b455 87 break;
va009039 0:c972ee42b455 88 }
va009039 0:c972ee42b455 89 TEST_ASSERT(p);
va009039 0:c972ee42b455 90 return p;
va009039 0:c972ee42b455 91 }
va009039 0:c972ee42b455 92
va009039 0:c972ee42b455 93 void usb_ram_free(void* p)
va009039 0:c972ee42b455 94 {
va009039 0:c972ee42b455 95 TEST_ASSERT(p >= ram);
va009039 0:c972ee42b455 96 TEST_ASSERT(p < (ram+CHUNK_SIZE*BLOCK_COUNT));
va009039 0:c972ee42b455 97 int idx = ((int)p-(int)ram)/CHUNK_SIZE;
va009039 0:c972ee42b455 98 int block = map[idx];
va009039 0:c972ee42b455 99 TEST_ASSERT(block >= 1);
va009039 0:c972ee42b455 100 for(int i =0; i < block; i++) {
va009039 0:c972ee42b455 101 map[idx + i] = 0;
va009039 0:c972ee42b455 102 }
va009039 0:c972ee42b455 103 }
va009039 0:c972ee42b455 104
va009039 0:c972ee42b455 105 #endif // DBG_USE_POSIX_MEMALIGN
va009039 0:c972ee42b455 106
va009039 0:c972ee42b455 107