Samuel Mokrani
USBMSD SD card Hello World for Mbed platforms
Dependencies: mbed USBMSD_SD USBDevice
Diff: USBDevice/USBMSD/USBMSD.cpp
- Revision:
- 7:6494da2a5c60
- Parent:
- 6:126c4d980196
- Child:
- 8:534fd41d8cc7
--- a/USBDevice/USBMSD/USBMSD.cpp Mon Nov 14 10:00:07 2011 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,617 +0,0 @@
-// USBMSD.cpp
-// USB mass storage device example
-// Copyright (c) 2011 ARM Limited. All rights reserved.
-
-#include "stdint.h"
-#include "USBMSD.h"
-#include "USBBusInterface.h"
-
-#define CBW_Signature 0x43425355
-#define CSW_Signature 0x53425355
-
-// SCSI Commands
-#define TEST_UNIT_READY 0x00
-#define REQUEST_SENSE 0x03
-#define FORMAT_UNIT 0x04
-#define INQUIRY 0x12
-#define MODE_SELECT6 0x15
-#define MODE_SENSE6 0x1A
-#define START_STOP_UNIT 0x1B
-#define MEDIA_REMOVAL 0x1E
-#define READ_FORMAT_CAPACITIES 0x23
-#define READ_CAPACITY 0x25
-#define READ10 0x28
-#define WRITE10 0x2A
-#define VERIFY10 0x2F
-#define READ12 0xA8
-#define WRITE12 0xAA
-#define MODE_SELECT10 0x55
-#define MODE_SENSE10 0x5A
-
-// MSC class specific requests
-#define MSC_REQUEST_RESET 0xFF
-#define MSC_REQUEST_GET_MAX_LUN 0xFE
-
-#define DEFAULT_CONFIGURATION (1)
-
-// Max In/Out Packet Size on the bulk endpoint */
-#define MAX_PACKET MAX_PACKET_SIZE_EPBULK
-
-// CSW Status
-enum Status {
- CSW_PASSED,
- CSW_FAILED,
- CSW_ERROR,
-};
-
-
-USBMSD::USBMSD(uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) {
-}
-
-
-DigitalOut l2(LED2);
-// Called in ISR context to process a class specific request
-bool USBMSD::USBCallback_request(void) {
-
- bool success = false;
- CONTROL_TRANSFER * transfer = getTransferPtr();
-
- if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
- switch (transfer->setup.bRequest) {
- case MSC_REQUEST_RESET:
- reset();
- success = true;
- break;
- case MSC_REQUEST_GET_MAX_LUN:
- transfer->remaining = 1;
- transfer->ptr = getMaxLUN();
- transfer->direction = DEVICE_TO_HOST;
- success = true;
- break;
- default:
- break;
- }
- }
-
- return success;
-}
-
-
-bool USBMSD::connect()
-{
-
- //disk initialization
- diskInit();
-
- // get block size
- BlockSize = blockSize();
- if(BlockSize != 0) {
- page = (uint8_t *)malloc(BlockSize * sizeof(uint8_t));
- if(page == NULL)
- return false;
- }
-
- //get memory size
- MemorySize = memorySize();
- if(!MemorySize) {
- return false;
- }
- BlockCount = MemorySize/BlockSize;
-
- //connect the device
- USBDevice::connect();
- return true;
-}
-
-
-void USBMSD::reset()
-{
- stage = READ_CBW;
-}
-
-uint8_t * USBMSD::getMaxLUN()
-{
- static uint8_t LUN[] = {0};
- return LUN;
-}
-
-// Called in ISR context called when a data is received
-bool USBMSD::EP2_OUT_callback() {
- uint16_t size = 0;
- uint8_t buf[MAX_PACKET_SIZE_EPBULK];
- read(EPBULK_OUT, buf, &size, MAX_PACKET_SIZE_EPBULK);
- switch (stage) {
- // the device has to decode the CBW received
- case READ_CBW:
- CBWDecode(buf, size);
- break;
-
- // the device has to receive data from the host
- case PROCESS_CBW:
- switch (cbw.CB[0]) {
- case WRITE10:
- case WRITE12:
- memoryWrite(buf, size);
- break;
- case VERIFY10:
- memoryVerify(buf, size);
- break;
- }
- break;
-
- // an error has occured: stall endpoint and send CSW
- default:
- stallEndpoint(EPBULK_OUT);
- csw.Status = CSW_ERROR;
- sendCSW();
- break;
- }
-
- //reactivate readings on the OUT bulk endpoint
- readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
- return true;
-}
-
-// Called in ISR context when a data has been transferred
-bool USBMSD::EP2_IN_callback() {
- switch (stage) {
-
- // the device has to send data to the host
- case PROCESS_CBW:
- switch (cbw.CB[0]) {
- case READ10:
- case READ12:
- memoryRead();
- break;
- }
- break;
-
- //the device has to send a CSW
- case SEND_CSW:
- sendCSW();
- break;
-
- // an error has occured
- case ERROR:
- stallEndpoint(EPBULK_IN);
- sendCSW();
- break;
-
- // the host has received the CSW -> we wait a CBW
- case WAIT_CSW:
- stage = READ_CBW;
- break;
- }
- return true;
-}
-
-
-void USBMSD::memoryWrite (uint8_t * buf, uint16_t size) {
-
- if ((addr + size) > MemorySize) {
- size = MemorySize - addr;
- stage = ERROR;
- stallEndpoint(EPBULK_OUT);
- }
-
- // we fill an array in RAM of 1 block before writing it in memory
- for (int i = 0; i < size; i++)
- page[addr%BlockSize + i] = buf[i];
-
- // if the array is filled, write it in memory
- if (!((addr + size)%BlockSize))
- blockWrite(page, addr/BlockSize);
-
- addr += size;
- length -= size;
- csw.DataResidue -= size;
-
- if ((!length) || (stage != PROCESS_CBW)) {
- csw.Status = (stage == ERROR) ? CSW_FAILED : CSW_PASSED;
- sendCSW();
- }
-}
-
-void USBMSD::memoryVerify (uint8_t * buf, uint16_t size) {
- uint32_t n;
-
- if ((addr + size) > MemorySize) {
- size = MemorySize - addr;
- stage = ERROR;
- stallEndpoint(EPBULK_OUT);
- }
-
- // beginning of a new block -> load a whole block in RAM
- if (!(addr%BlockSize))
- blockRead(page, addr/BlockSize);
-
- // info are in RAM -> no need to re-read memory
- for (n = 0; n < size; n++) {
- if (page[addr%BlockSize + n] != buf[n]) {
- memOK = false;
- break;
- }
- }
-
- addr += size;
- length -= size;
- csw.DataResidue -= size;
-
- if ( !length || (stage != PROCESS_CBW)) {
- csw.Status = (memOK && (stage == PROCESS_CBW)) ? CSW_PASSED : CSW_FAILED;
- sendCSW();
- }
-}
-
-
-bool USBMSD::inquiryRequest (void) {
- uint8_t inquiry[] = { 0x00, 0x80, 0x00, 0x01,
- 36 - 4, 0x80, 0x00, 0x00,
- 'M', 'B', 'E', 'D', '.', 'O', 'R', 'G',
- 'M', 'B', 'E', 'D', ' ', 'U', 'S', 'B', ' ', 'D', 'I', 'S', 'K', ' ', ' ', ' ',
- '1', '.', '0', ' ',
- };
- if (!write(inquiry, sizeof(inquiry))) {
- return false;
- }
- return true;
-}
-
-
-bool USBMSD::readFormatCapacity() {
- uint8_t capacity[] = { 0x00, 0x00, 0x00, 0x08,
- (BlockCount >> 24) & 0xff,
- (BlockCount >> 16) & 0xff,
- (BlockCount >> 8) & 0xff,
- (BlockCount >> 0) & 0xff,
-
- 0x02,
- (BlockSize >> 16) & 0xff,
- (BlockSize >> 8) & 0xff,
- (BlockSize >> 0) & 0xff,
- };
- if (!write(capacity, sizeof(capacity))) {
- return false;
- }
- return true;
-}
-
-
-bool USBMSD::readCapacity (void) {
- uint8_t capacity[] = {
- ((BlockCount - 1) >> 24) & 0xff,
- ((BlockCount - 1) >> 16) & 0xff,
- ((BlockCount - 1) >> 8) & 0xff,
- ((BlockCount - 1) >> 0) & 0xff,
-
- (BlockSize >> 24) & 0xff,
- (BlockSize >> 16) & 0xff,
- (BlockSize >> 8) & 0xff,
- (BlockSize >> 0) & 0xff,
- };
- if (!write(capacity, sizeof(capacity))) {
- return false;
- }
- return true;
-}
-
-bool USBMSD::write (uint8_t * buf, uint16_t size) {
-
- if (size >= cbw.DataLength) {
- size = cbw.DataLength;
- }
- stage = SEND_CSW;
-
- if (!writeNB(EPBULK_IN, buf, size, MAX_PACKET_SIZE_EPBULK)) {
- return false;
- }
-
- csw.DataResidue -= size;
- csw.Status = CSW_PASSED;
- return true;
-}
-
-
-bool USBMSD::modeSense6 (void) {
- uint8_t sense6[] = { 0x03, 0x00, 0x00, 0x00 };
- if (!write(sense6, sizeof(sense6))) {
- return false;
- }
- return true;
-}
-
-void USBMSD::sendCSW() {
- csw.Signature = CSW_Signature;
- writeNB(EPBULK_IN, (uint8_t *)&csw, sizeof(CSW), MAX_PACKET_SIZE_EPBULK);
- stage = WAIT_CSW;
-}
-
-bool USBMSD::requestSense (void) {
- uint8_t request_sense[] = {
- 0x70, // Response Code
- 0x00,
- 0x05, // Sense Key: illegal request
- 0x00,
- 0x00,
- 0x00,
- 0x00,
- 0x0A, // Additional Length
- 0x00,
- 0x00,
- 0x00,
- 0x00,
- 0x30, // ASC
- 0x01, // ASCQ
- 0x00,
- 0x00,
- 0x00,
- 0x00,
- };
-
- if (!write(request_sense, sizeof(request_sense))) {
- return false;
- }
-
- return true;
-}
-
-void USBMSD::fail() {
- csw.Status = CSW_FAILED;
- sendCSW();
-}
-
-DigitalOut l1(LED1);
-void USBMSD::CBWDecode(uint8_t * buf, uint16_t size) {
- if (size == sizeof(cbw)) {
- memcpy((uint8_t *)&cbw, buf, size);
- if (cbw.Signature == CBW_Signature) {
- csw.Tag = cbw.Tag;
- csw.DataResidue = cbw.DataLength;
- if ((cbw.CBLength < 1) || (cbw.CBLength > 16) ) {
- fail();
- } else {
- switch (cbw.CB[0]) {
- case TEST_UNIT_READY:
- testUnitReady();
- break;
- case REQUEST_SENSE:
- requestSense();
- break;
- case INQUIRY:
- inquiryRequest();
- break;
- case MODE_SENSE6:
- modeSense6();
- break;
- case READ_FORMAT_CAPACITIES:
- readFormatCapacity();
- break;
- case READ_CAPACITY:
- readCapacity();
- break;
- case READ10:
- case READ12:
- if (infoTransfer()) {
- if ((cbw.Flags & 0x80)) {
- stage = PROCESS_CBW;
- memoryRead();
- } else {
- stallEndpoint(EPBULK_OUT);
- csw.Status = CSW_ERROR;
- sendCSW();
- }
- }
- break;
- case WRITE10:
- case WRITE12:
- if (infoTransfer()) {
- if (!(cbw.Flags & 0x80)) {
- stage = PROCESS_CBW;
- } else {
- stallEndpoint(EPBULK_IN);
- csw.Status = CSW_ERROR;
- sendCSW();
- }
- }
- break;
- case VERIFY10:
- if (!(cbw.CB[1] & 0x02)) {
- csw.Status = CSW_PASSED;
- sendCSW();
- break;
- }
- if (infoTransfer()) {
- if (!(cbw.Flags & 0x80)) {
- stage = PROCESS_CBW;
- memOK = true;
- } else {
- stallEndpoint(EPBULK_IN);
- csw.Status = CSW_ERROR;
- sendCSW();
- }
- }
- break;
- default:
- fail();
- break;
- }
- }
- }
- }
-}
-
-void USBMSD::testUnitReady (void) {
-
- if (cbw.DataLength != 0) {
- if ((cbw.Flags & 0x80) != 0) {
- stallEndpoint(EPBULK_IN);
- } else {
- stallEndpoint(EPBULK_OUT);
- }
- }
-
- csw.Status = CSW_PASSED;
- sendCSW();
-}
-
-
-void USBMSD::memoryRead (void) {
- uint32_t n;
-
- n = (length > MAX_PACKET) ? MAX_PACKET : length;
-
- if ((addr + n) > MemorySize) {
- n = MemorySize - addr;
- stage = ERROR;
- }
-
- // we read an entire block
- if (!(addr%BlockSize))
- blockRead(page, addr/BlockSize);
-
- // write data which are in RAM
- writeNB(EPBULK_IN, &page[addr%BlockSize], n, MAX_PACKET_SIZE_EPBULK);
-
- addr += n;
- length -= n;
-
- csw.DataResidue -= n;
-
- if ( !length || (stage != PROCESS_CBW)) {
- csw.Status = (stage == PROCESS_CBW) ? CSW_PASSED : CSW_FAILED;
- sendCSW();
- }
-}
-
-
-bool USBMSD::infoTransfer (void) {
- uint32_t n;
-
- // Logical Block Address of First Block
- n = (cbw.CB[2] << 24) | (cbw.CB[3] << 16) | (cbw.CB[4] << 8) | (cbw.CB[5] << 0);
-
- addr = n * BlockSize;
-
- // Number of Blocks to transfer
- switch (cbw.CB[0]) {
- case READ10:
- case WRITE10:
- case VERIFY10:
- n = (cbw.CB[7] << 8) | (cbw.CB[8] << 0);
- break;
-
- case READ12:
- case WRITE12:
- n = (cbw.CB[6] << 24) | (cbw.CB[7] << 16) | (cbw.CB[8] << 8) | (cbw.CB[9] << 0);
- break;
- }
-
- length = n * BlockSize;
-
- if (!cbw.DataLength) { // host requests no data
- csw.Status = CSW_FAILED;
- sendCSW();
- return false;
- }
-
- if (cbw.DataLength != length) {
- if ((cbw.Flags & 0x80) != 0) {
- stallEndpoint(EPBULK_IN);
- } else {
- stallEndpoint(EPBULK_OUT);
- }
-
- csw.Status = CSW_FAILED;
- sendCSW();
- return false;
- }
-
- return true;
-}
-
-
-
-
-
-// Called in ISR context
-// Set configuration. Return false if the
-// configuration is not supported.
-bool USBMSD::USBCallback_setConfiguration(uint8_t configuration) {
- if (configuration != DEFAULT_CONFIGURATION) {
- return false;
- }
-
- // Configure endpoints > 0
- addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
- addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
-
- //activate readings
- readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
- return true;
-}
-
-
-uint8_t * USBMSD::stringIinterfaceDesc() {
- static uint8_t stringIinterfaceDescriptor[] = {
- 0x08, //bLength
- STRING_DESCRIPTOR, //bDescriptorType 0x03
- 'M',0,'S',0,'D',0 //bString iInterface - MSD
- };
- return stringIinterfaceDescriptor;
-}
-
-uint8_t * USBMSD::stringIproductDesc() {
- static uint8_t stringIproductDescriptor[] = {
- 0x12, //bLength
- STRING_DESCRIPTOR, //bDescriptorType 0x03
- 'M',0,'b',0,'e',0,'d',0,' ',0,'M',0,'S',0,'D',0 //bString iProduct - Mbed Audio
- };
- return stringIproductDescriptor;
-}
-
-
-uint8_t * USBMSD::configurationDesc() {
- static uint8_t configDescriptor[] = {
-
- // Configuration 1
- 9, // bLength
- 2, // bDescriptorType
- LSB(9 + 9 + 7 + 7), // wTotalLength
- MSB(9 + 9 + 7 + 7),
- 0x01, // bNumInterfaces
- 0x01, // bConfigurationValue: 0x01 is used to select this configuration
- 0x00, // iConfiguration: no string to describe this configuration
- 0xC0, // bmAttributes
- 100, // bMaxPower, device power consumption is 100 mA
-
- // Interface 0, Alternate Setting 0, MSC Class
- 9, // bLength
- 4, // bDescriptorType
- 0x00, // bInterfaceNumber
- 0x00, // bAlternateSetting
- 0x02, // bNumEndpoints
- 0x08, // bInterfaceClass
- 0x06, // bInterfaceSubClass
- 0x50, // bInterfaceProtocol
- 0x04, // iInterface
-
- // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
- 7, // bLength
- 5, // bDescriptorType
- PHY_TO_DESC(EPBULK_IN), // bEndpointAddress
- 0x02, // bmAttributes (0x02=bulk)
- LSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (LSB)
- MSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (MSB)
- 0, // bInterval
-
- // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
- 7, // bLength
- 5, // bDescriptorType
- PHY_TO_DESC(EPBULK_OUT), // bEndpointAddress
- 0x02, // bmAttributes (0x02=bulk)
- LSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (LSB)
- MSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (MSB)
- 0 // bInterval
- };
- return configDescriptor;
-}