USB Device ROM Stack API example program
LPC1549のROM APIを使ったRAMディスクです。PCからはUSBメモリとして見えます。
参考:
http://docs.lpcware.com/usbromlib/v1.0/
usbd_user_msc.c
- Committer:
- va009039
- Date:
- 2014-03-14
- Revision:
- 0:ef2c0c52abc4
File content as of revision 0:ef2c0c52abc4:
#include <rl_usb.h> // from USBMSD_Ram.cpp http://mbed.org/users/samux/code/RAM_DISK/ //5 sectors const uint8_t disk_image_0[] = { //sector 0: boot sector 0xEB,0x3C,0x90,0x4D,0x53,0x44,0x4F,0x53,0x35,0x2E,0x30, 0x00,0x02,/*bytes per sector: 512*/ 0x08, /*sectors per cluster*/ 0x01,0x00,/*number of reserved sector*/ 0x01, /* number of FATs*/ 0x10,0x00, /*Maximum number of root directory entries: 16*/ 0x20,0x00, /*Total sector count: 32*/ 0xF0, 0x02,0x00,/*sectors per FAT: 2*/ 0x01,0x00,/*Sectors per track*/ 0x01,0x00, /*Number of heads*/ 0x00,0x00,0x00,0x00, 0x00,0x01,0x00,0x00,0x00,0x00, 0x29, /*boot signature*/ 0x74,0x19,0x02,0x27, /*volume ID*/ 'M','b','e','d',' ', 'U','S','B',' ',' ',' ', /*volume label: Mbed USB*/ 0x46,0x41,0x54,0x31,0x32,0x20,0x20,0x20,0x33,0xC9, 0x8E,0xD1,0xBC,0xF0,0x7B,0x8E,0xD9,0xB8,0x00,0x20,0x8E,0xC0,0xFC,0xBD,0x00,0x7C, 0x38,0x4E,0x24,0x7D,0x24,0x8B,0xC1,0x99,0xE8,0x3C,0x01,0x72,0x1C,0x83,0xEB,0x3A, 0x66,0xA1,0x1C,0x7C,0x26,0x66,0x3B,0x07,0x26,0x8A,0x57,0xFC,0x75,0x06,0x80,0xCA, 0x02,0x88,0x56,0x02,0x80,0xC3,0x10,0x73,0xEB,0x33,0xC9,0x8A,0x46,0x10,0x98,0xF7, 0x66,0x16,0x03,0x46,0x1C,0x13,0x56,0x1E,0x03,0x46,0x0E,0x13,0xD1,0x8B,0x76,0x11, 0x60,0x89,0x46,0xFC,0x89,0x56,0xFE,0xB8,0x20,0x00,0xF7,0xE6,0x8B,0x5E,0x0B,0x03, 0xC3,0x48,0xF7,0xF3,0x01,0x46,0xFC,0x11,0x4E,0xFE,0x61,0xBF,0x00,0x00,0xE8,0xE6, 0x00,0x72,0x39,0x26,0x38,0x2D,0x74,0x17,0x60,0xB1,0x0B,0xBE,0xA1,0x7D,0xF3,0xA6, 0x61,0x74,0x32,0x4E,0x74,0x09,0x83,0xC7,0x20,0x3B,0xFB,0x72,0xE6,0xEB,0xDC,0xA0, 0xFB,0x7D,0xB4,0x7D,0x8B,0xF0,0xAC,0x98,0x40,0x74,0x0C,0x48,0x74,0x13,0xB4,0x0E, 0xBB,0x07,0x00,0xCD,0x10,0xEB,0xEF,0xA0,0xFD,0x7D,0xEB,0xE6,0xA0,0xFC,0x7D,0xEB, 0xE1,0xCD,0x16,0xCD,0x19,0x26,0x8B,0x55,0x1A,0x52,0xB0,0x01,0xBB,0x00,0x00,0xE8, 0x3B,0x00,0x72,0xE8,0x5B,0x8A,0x56,0x24,0xBE,0x0B,0x7C,0x8B,0xFC,0xC7,0x46,0xF0, 0x3D,0x7D,0xC7,0x46,0xF4,0x29,0x7D,0x8C,0xD9,0x89,0x4E,0xF2,0x89,0x4E,0xF6,0xC6, 0x06,0x96,0x7D,0xCB,0xEA,0x03,0x00,0x00,0x20,0x0F,0xB6,0xC8,0x66,0x8B,0x46,0xF8, 0x66,0x03,0x46,0x1C,0x66,0x8B,0xD0,0x66,0xC1,0xEA,0x10,0xEB,0x5E,0x0F,0xB6,0xC8, 0x4A,0x4A,0x8A,0x46,0x0D,0x32,0xE4,0xF7,0xE2,0x03,0x46,0xFC,0x13,0x56,0xFE,0xEB, 0x4A,0x52,0x50,0x06,0x53,0x6A,0x01,0x6A,0x10,0x91,0x8B,0x46,0x18,0x96,0x92,0x33, 0xD2,0xF7,0xF6,0x91,0xF7,0xF6,0x42,0x87,0xCA,0xF7,0x76,0x1A,0x8A,0xF2,0x8A,0xE8, 0xC0,0xCC,0x02,0x0A,0xCC,0xB8,0x01,0x02,0x80,0x7E,0x02,0x0E,0x75,0x04,0xB4,0x42, 0x8B,0xF4,0x8A,0x56,0x24,0xCD,0x13,0x61,0x61,0x72,0x0B,0x40,0x75,0x01,0x42,0x03, 0x5E,0x0B,0x49,0x75,0x06,0xF8,0xC3,0x41,0xBB,0x00,0x00,0x60,0x66,0x6A,0x00,0xEB, 0xB0,0x4E,0x54,0x4C,0x44,0x52,0x20,0x20,0x20,0x20,0x20,0x20,0x0D,0x0A,0x52,0x65, 0x6D,0x6F,0x76,0x65,0x20,0x64,0x69,0x73,0x6B,0x73,0x20,0x6F,0x72,0x20,0x6F,0x74, 0x68,0x65,0x72,0x20,0x6D,0x65,0x64,0x69,0x61,0x2E,0xFF,0x0D,0x0A,0x44,0x69,0x73, 0x6B,0x20,0x65,0x72,0x72,0x6F,0x72,0xFF,0x0D,0x0A,0x50,0x72,0x65,0x73,0x73,0x20, 0x61,0x6E,0x79,0x20,0x6B,0x65,0x79,0x20,0x74,0x6F,0x20,0x72,0x65,0x73,0x74,0x61, 0x72,0x74,0x0D,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xAC,0xCB,0xD8,0x55,0xAA, }; const uint8_t disk_image_1[] = { //sector 1: FAT 1 0xF8,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x0F, }; const uint8_t disk_image_2[] = { //sector 2: FAT1: two sectors per FAT }; const uint8_t disk_image_3[] = { //sector 3: root directory //entry 1 'M','b','e','d',' ','U','S','B',' ',' ',' ', 0x28,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //entry 2 0x52,0x45,0x41,0x44,0x4D,0x45,0x20,0x20,0x54,0x58,0x54, /*readme.txt*/ 0x20,0x00,0x00,0x00,0x00, 0x21,0x00,0xBB,0x32,0x00,0x00, 0xDC,0x83,/*hour/min/doublesec*/ 0x6A,0x3F,/*year/month/day*/ 0x02,0x00, /*starting cluster*/ 0x1e,0x00,0x00,0x00, /*size*/ }; const uint8_t disk_image_4[] = { //sector 4: data 'H','e','l','l','o',' ','f','r','o','m',' ','M','b','e','d','!', '\r','\n','U','S','B',' ','M','S','D',' ','d','e','m','o', }; #define SLOT_SIZE 48 static int slot[SLOT_SIZE]; static uint8_t image[SLOT_SIZE][512]; static int index_block(int block) { int i; for(i = 0; i < SLOT_SIZE; i++) { if (slot[i] == block) { return i; } } return -1; } static int block_len(uint8_t* buf) { int i; for(i = 512-1; i >= 0; i--) { if (buf[i] != 0x00) { return i+1; } } return 0; } static void mem_cpy(uint8_t* dst, const uint8_t* src, int size) { while(size-- > 0) { *dst++ = *src++; } } static void mem_set(uint8_t* dst, uint8_t dat, int size) { while(size-- > 0) { *dst++ = dat; } } void usbd_msc_read_sect(uint32_t block, uint8_t *buf, uint32_t num_of_blocks) { int i; i = index_block(block); if (i != (-1)) { mem_cpy(buf, image[i], 512); } else { mem_set(buf, 0x00, 512); } } void usbd_msc_write_sect(uint32_t block, uint8_t *buf, uint32_t num_of_blocks) { int i, len; len = block_len(buf); i = index_block(block); if (i != -1) { if (len == 0) { slot[i] = -1; } else { mem_cpy(image[i], buf, 512); } } else { if (len != 0) { for(i = 0; i < SLOT_SIZE; i++) { if (slot[i] == (-1)) { slot[i] = block; mem_cpy(image[i], buf, 512); break; } } } } } void usbd_msc_init () { int i; for(i = 0; i < SLOT_SIZE; i++) { slot[i] = -1; mem_set(image[i], 0, 512); } for(i = 0; i < 5; i++) { slot[i] = i; } mem_cpy(image[0], disk_image_0, sizeof(disk_image_0)); mem_cpy(image[1], disk_image_1, sizeof(disk_image_1)); mem_cpy(image[2], disk_image_2, sizeof(disk_image_2)); mem_cpy(image[3], disk_image_3, sizeof(disk_image_3)); mem_cpy(image[4], disk_image_4, sizeof(disk_image_4)); USBD_MSC_MemorySize = 65536; USBD_MSC_BlockSize = 512; USBD_MSC_BlockGroup = 1; USBD_MSC_BlockCount = USBD_MSC_MemorySize / USBD_MSC_BlockSize; //USBD_MSC_BlockBuf = (uint8_t *)usb_buffer; //USBD_MSC_MediaReady = __TRUE; }