Yuji Notsu
This program is for Star Board Orange. Wave file into SD card is read, and its DAC signal output.
Dependencies: EthernetNetIf mbed HTTPServer
Revision 0:383bff20e783, committed 2010-11-25
- Comitter:
- y_notsu
- Date:
- Thu Nov 25 14:59:16 2010 +0000
- Commit message:
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EthernetNetIf.lib Thu Nov 25 14:59:16 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/donatien/code/EthernetNetIf/#bc7df6da7589
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FATFileSystem.lib Thu Nov 25 14:59:16 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_unsupported/code/fatfilesystem/ \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HTTPServer.lib Thu Nov 25 14:59:16 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/donatien/code/HTTPServer/#d753966e4d97
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SDHCFileSystem.cpp Thu Nov 25 14:59:16 2010 +0000
@@ -0,0 +1,495 @@
+/* mbed SDFileSystem Library, for providing file access to SD cards
+ * Copyright (c) 2008-2010, sford
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+//* Introduction
+// * ------------
+// * SD and MMC cards support a number of interfaces, but common to them all
+// * is one based on SPI. This is the one I'm implmenting because it means
+// * it is much more portable even though not so performant, and we already
+// * have the mbed SPI Interface!
+// *
+// * The main reference I'm using is Chapter 7, "SPI Mode" of:
+// * http://www.sdcard.org/developers/tech/sdcard/pls/Simplified_Physical_Layer_Spec.pdf
+// *
+// * SPI Startup
+// * -----------
+// * The SD card powers up in SD mode. The SPI interface mode is selected by
+// * asserting CS low and sending the reset command (CMD0). The card will
+// * respond with a (R1) response.
+// *
+// * CMD8 is optionally sent to determine the voltage range supported, and
+// * indirectly determine whether it is a version 1.x SD/non-SD card or
+// * version 2.x. I'll just ignore this for now.
+// *
+// * ACMD41 is repeatedly issued to initialise the card, until "in idle"
+// * (bit 0) of the R1 response goes to '0', indicating it is initialised.
+// *
+// * You should also indicate whether the host supports High Capicity cards,
+// * and check whether the card is high capacity - i'll also ignore this
+// *
+// * SPI Protocol
+// * ------------
+// * The SD SPI protocol is based on transactions made up of 8-bit words, with
+//* the host starting every bus transaction by asserting the CS signal low. The
+// * card always responds to commands, data blocks and errors.
+// *
+// * The protocol supports a CRC, but by default it is off (except for the
+// * first reset CMD0, where the CRC can just be pre-calculated, and CMD8)
+// * I'll leave the CRC off I think!
+// *
+// * Standard capacity cards have variable data block sizes, whereas High
+// * Capacity cards fix the size of data block to 512 bytes. I'll therefore
+// * just always use the Standard Capacity cards with a block size of 512 bytes.
+// * This is set with CMD16.
+// *
+// * You can read and write single blocks (CMD17, CMD25) or multiple blocks
+// * (CMD18, CMD25). For simplicity, I'll just use single block accesses. When
+// * the card gets a read command, it responds with a response token, and then
+// * a data token or an error.
+// *
+// * SPI Command Format
+// * ------------------
+// * Commands are 6-bytes long, containing the command, 32-bit argument, and CRC.
+// *
+// * +---------------+------------+------------+-----------+----------+--------------+
+// * | 01 | cmd[5:0] | arg[31:24] | arg[23:16] | arg[15:8] | arg[7:0] | crc[6:0] | 1 |
+// * +---------------+------------+------------+-----------+----------+--------------+
+// *
+// * As I'm not using CRC, I can fix that byte to what is needed for CMD0 (0x95)
+// *
+// * All Application Specific commands shall be preceded with APP_CMD (CMD55).
+// *
+// * SPI Response Format
+// * -------------------
+// * The main response format (R1) is a status byte (normally zero). Key flags:
+// * idle - 1 if the card is in an idle state/initialising
+// * cmd - 1 if an illegal command code was detected
+// *
+// * +-------------------------------------------------+
+// * R1 | 0 | arg | addr | seq | crc | cmd | erase | idle |
+// * +-------------------------------------------------+
+// *
+// * R1b is the same, except it is followed by a busy signal (zeros) until
+// * the first non-zero byte when it is ready again.
+// *
+// * Data Response Token
+// * -------------------
+// * Every data block written to the card is acknowledged by a byte
+// * response token
+// *
+// * +----------------------+
+// * | xxx | 0 | status | 1 |
+// * +----------------------+
+// * 010 - OK!
+// * 101 - CRC Error
+// * 110 - Write Error
+// *
+// * Single Block Read and Write
+// * ---------------------------
+// *
+// * Block transfers have a byte header, followed by the data, followed
+// * by a 16-bit CRC. In our case, the data will always be 512 bytes.
+// *
+// * +------+---------+---------+- - - -+---------+-----------+----------+
+// * | 0xFE | data[0] | data[1] | | data[n] | crc[15:8] | crc[7:0] |
+// * +------+---------+---------+- - - -+---------+-----------+----------+
+// */
+//
+//*
+// * Comment: Changes for SDHC support till 32GB
+// * Name: KB
+// * Date: 07/24/2010
+// * Release: 0.1
+// */
+
+#include "SDHCFileSystem.h"
+
+#define DEBUG
+#define SD_COMMAND_TIMEOUT 5000
+
+
+SDFileSystem::SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name) :
+ FATFileSystem(name), _spi(mosi, miso, sclk), _cs(cs) {
+ _cs = 1;
+}
+
+#define R1_IDLE_STATE (1 << 0)
+#define R1_ERASE_RESET (1 << 1)
+#define R1_ILLEGAL_COMMAND (1 << 2)
+#define R1_COM_CRC_ERROR (1 << 3)
+#define R1_ERASE_SEQUENCE_ERROR (1 << 4)
+#define R1_ADDRESS_ERROR (1 << 5)
+#define R1_PARAMETER_ERROR (1 << 6)
+
+// Types
+// - v1.x Standard Capacity
+// - v2.x Standard Capacity
+// - v2.x High Capacity
+// - Not recognised as an SD Card
+
+#define SDCARD_FAIL 0
+#define SDCARD_V1 1
+#define SDCARD_V2 2
+#define SDCARD_V2HC 3
+
+int SDFileSystem::initialise_card() {
+ // Set to 100kHz for initialisation, and clock card with cs = 1
+ _spi.frequency(100000);
+ _cs = 1;
+ for(int i=0; i<16; i++) {
+ _spi.write(0xFF);
+ }
+
+ // send CMD0, should return with all zeros except IDLE STATE set (bit 0)
+ if(_cmd(0, 0) != R1_IDLE_STATE) {
+ fprintf(stderr, "No disk, or could not put SD card in to SPI idle state\n");
+ return SDCARD_FAIL;
+ }
+
+ // send CMD8 to determine whther it is ver 2.x
+ int r = _cmd8();
+ if(r == R1_IDLE_STATE) {
+ return initialise_card_v2();
+ } else if(r == (R1_IDLE_STATE | R1_ILLEGAL_COMMAND)) {
+ return initialise_card_v1();
+ } else {
+ fprintf(stderr, "Not in idle state after sending CMD8 (not an SD card?)\n");
+ return SDCARD_FAIL;
+ }
+}
+
+int SDFileSystem::initialise_card_v1() {
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ _cmd(55, 0);
+ if(_cmd(41, 0) == 0) {
+ cdv = 512;
+ #ifdef DEBUG
+ printf("\n\rInit: SEDCARD_V1\n\r");
+ #endif
+ return SDCARD_V1;
+ }
+ }
+
+ fprintf(stderr, "Timeout waiting for v1.x card\n");
+ return SDCARD_FAIL;
+}
+
+int SDFileSystem::initialise_card_v2() {
+
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ wait_ms(50);
+ _cmd58();
+ _cmd(55, 0);
+ if(_cmd(41, 0x40000000) == 0) {
+ _cmd58();
+ #ifdef DEBUG
+ printf("\n\rInit: SDCARD_V2\n\r");
+ #endif
+ cdv = 1;
+ return SDCARD_V2;
+ }
+ }
+
+ fprintf(stderr, "Timeout waiting for v2.x card\n");
+ return SDCARD_FAIL;
+}
+
+int SDFileSystem::disk_initialize() {
+
+ int i = initialise_card();
+ #ifdef DEBUG
+ printf("init card = %d\n", i);
+ #endif
+ _sectors = _sd_sectors();
+
+ // Set block length to 512 (CMD16)
+ if(_cmd(16, 512) != 0) {
+ fprintf(stderr, "Set 512-byte block timed out\n");
+ return 1;
+ }
+
+ _spi.frequency(1000000); // Set to 1MHz for data transfer
+ return 0;
+}
+
+int SDFileSystem::disk_write(const char *buffer, int block_number) {
+ // set write address for single block (CMD24)
+ if(_cmd(24, block_number * cdv) != 0) {
+ return 1;
+ }
+
+ // send the data block
+ _write(buffer, 512);
+ return 0;
+}
+
+int SDFileSystem::disk_read(char *buffer, int block_number) {
+ // set read address for single block (CMD17)
+ if(_cmd(17, block_number * cdv) != 0) {
+ return 1;
+ }
+
+ // receive the data
+ _read(buffer, 512);
+ return 0;
+}
+
+int SDFileSystem::disk_status() { return 0; }
+int SDFileSystem::disk_sync() { return 0; }
+int SDFileSystem::disk_sectors() { return _sectors; }
+
+// PRIVATE FUNCTIONS
+
+int SDFileSystem::_cmd(int cmd, int arg) {
+ _cs = 0;
+
+ // send a command
+ _spi.write(0x40 | cmd);
+ _spi.write(arg >> 24);
+ _spi.write(arg >> 16);
+ _spi.write(arg >> 8);
+ _spi.write(arg >> 0);
+ _spi.write(0x95);
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ int response = _spi.write(0xFF);
+ if(!(response & 0x80)) {
+ _cs = 1;
+ _spi.write(0xFF);
+ return response;
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+int SDFileSystem::_cmdx(int cmd, int arg) {
+ _cs = 0;
+
+ // send a command
+ _spi.write(0x40 | cmd);
+ _spi.write(arg >> 24);
+ _spi.write(arg >> 16);
+ _spi.write(arg >> 8);
+ _spi.write(arg >> 0);
+ _spi.write(0x95);
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ int response = _spi.write(0xFF);
+ if(!(response & 0x80)) {
+ return response;
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+
+
+int SDFileSystem::_cmd58() {
+ _cs = 0;
+ int arg = 0;
+
+ // send a command
+ _spi.write(0x40 | 58);
+ _spi.write(arg >> 24);
+ _spi.write(arg >> 16);
+ _spi.write(arg >> 8);
+ _spi.write(arg >> 0);
+ _spi.write(0x95);
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT; i++) {
+ int response = _spi.write(0xFF);
+ if(!(response & 0x80)) {
+ int ocr = _spi.write(0xFF) << 24;
+ ocr |= _spi.write(0xFF) << 16;
+ ocr |= _spi.write(0xFF) << 8;
+ ocr |= _spi.write(0xFF) << 0;
+// printf("OCR = 0x%08X\n", ocr);
+ _cs = 1;
+ _spi.write(0xFF);
+ return response;
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+
+int SDFileSystem::_cmd8() {
+ _cs = 0;
+
+ // send a command
+ _spi.write(0x40 | 8); // CMD8
+ _spi.write(0x00); // reserved
+ _spi.write(0x00); // reserved
+ _spi.write(0x01); // 3.3v
+ _spi.write(0xAA); // check pattern
+ _spi.write(0x87); // crc
+
+ // wait for the repsonse (response[7] == 0)
+ for(int i=0; i<SD_COMMAND_TIMEOUT * 1000; i++) {
+ char response[5];
+ response[0] = _spi.write(0xFF);
+ if(!(response[0] & 0x80)) {
+ for(int j=1; j<5; j++) {
+ response[i] = _spi.write(0xFF);
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return response[0];
+ }
+ }
+ _cs = 1;
+ _spi.write(0xFF);
+ return -1; // timeout
+}
+
+int SDFileSystem::_read(char *buffer, int length) {
+ _cs = 0;
+
+ // read until start byte (0xFF)
+ while(_spi.write(0xFF) != 0xFE);
+
+ // read data
+ for(int i=0; i<length; i++) {
+ buffer[i] = _spi.write(0xFF);
+ }
+ _spi.write(0xFF); // checksum
+ _spi.write(0xFF);
+
+ _cs = 1;
+ _spi.write(0xFF);
+ return 0;
+}
+
+int SDFileSystem::_write(const char *buffer, int length) {
+ _cs = 0;
+
+ // indicate start of block
+ _spi.write(0xFE);
+
+ // write the data
+ for(int i=0; i<length; i++) {
+ _spi.write(buffer[i]);
+ }
+
+ // write the checksum
+ _spi.write(0xFF);
+ _spi.write(0xFF);
+
+ // check the repsonse token
+ if((_spi.write(0xFF) & 0x1F) != 0x05) {
+ _cs = 1;
+ _spi.write(0xFF);
+ return 1;
+ }
+
+ // wait for write to finish
+ while(_spi.write(0xFF) == 0);
+
+ _cs = 1;
+ _spi.write(0xFF);
+ return 0;
+}
+
+static int ext_bits(char *data, int msb, int lsb) {
+ int bits = 0;
+ int size = 1 + msb - lsb;
+ for(int i=0; i<size; i++) {
+ int position = lsb + i;
+ int byte = 15 - (position >> 3);
+ int bit = position & 0x7;
+ int value = (data[byte] >> bit) & 1;
+ bits |= value << i;
+ }
+ return bits;
+}
+
+int SDFileSystem::_sd_sectors() {
+
+ int c_size, c_size_mult, read_bl_len;
+ int block_len, mult, blocknr, capacity;
+ int blocks, hc_c_size;
+ uint64_t hc_capacity;
+
+ // CMD9, Response R2 (R1 byte + 16-byte block read)
+ if(_cmdx(9, 0) != 0) {
+ fprintf(stderr, "Didn't get a response from the disk\n");
+ return 0;
+ }
+
+ char csd[16];
+ if(_read(csd, 16) != 0) {
+ fprintf(stderr, "Couldn't read csd response from disk\n");
+ return 0;
+ }
+
+ // csd_structure : csd[127:126]
+ // c_size : csd[73:62]
+ // c_size_mult : csd[49:47]
+ // read_bl_len : csd[83:80] - the *maximum* read block length
+
+ int csd_structure = ext_bits(csd, 127, 126);
+
+ #ifdef DEBUG
+ printf("\n\rCSD_STRUCT = %d\n", csd_structure);
+ #endif
+
+ switch (csd_structure){
+ case 0:
+ cdv = 512;
+ c_size = ext_bits(csd, 73, 62);
+ c_size_mult = ext_bits(csd, 49, 47);
+ read_bl_len = ext_bits(csd, 83, 80);
+
+ block_len = 1 << read_bl_len;
+ mult = 1 << (c_size_mult + 2);
+ blocknr = (c_size + 1) * mult;
+ capacity = blocknr * block_len;
+ blocks = capacity / 512;
+ #ifdef DEBUG
+ printf("\n\rSDCard\n\rc_size: %.4X \n\rcapacity: %.ld \n\rsectors: %d\n\r", c_size, capacity, blocks);
+ #endif
+ break;
+
+ case 1:
+ cdv = 1;
+ hc_c_size = ext_bits(csd, 63, 48);
+ int hc_read_bl_len = ext_bits(csd, 83, 80);
+ hc_capacity = hc_c_size+1;
+ blocks = (hc_c_size+1)*1024;
+ #ifdef DEBUG
+ printf("\n\rSDHC Card \n\rhc_c_size: %.4X \n\rcapacity: %.lld \n\rsectors: %d\n\r", hc_c_size, hc_capacity*512*1024, blocks);
+ #endif
+ break;
+
+ default:
+ fprintf(stderr, "This disk tastes funny! I only know about type 0 CSD structures\n");
+ return 0;
+ // break;
+ };
+ return blocks;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SDHCFileSystem.h Thu Nov 25 14:59:16 2010 +0000
@@ -0,0 +1,87 @@
+/* mbed SDFileSystem Library, for providing file access to SD cards
+ * Copyright (c) 2008-2010, sford
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MBED_SDHCFILESYSTEM_H
+#define MBED_SDHCFILESYSTEM_H
+
+#include "mbed.h"
+#include "FATFileSystem.h"
+
+/* Double Words */
+typedef unsigned long long uint64_t;
+typedef long long sint64_t;
+
+/** Access the filesystem on an SD Card using SPI
+// *
+// * @code
+// * #include "mbed.h"
+// * #include "SDFileSystem.h"
+// *
+// * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
+// *
+// * int main() {
+// * FILE *fp = fopen("/sd/myfile.txt", "w");
+// * fprintf(fp, "Hello World!\n");
+// * fclose(fp);
+// * }
+// */
+class SDFileSystem : public FATFileSystem {
+public:
+
+ /** Create the File System for accessing an SD Card using SPI
+ *
+ * @param mosi SPI mosi pin connected to SD Card
+ * @param miso SPI miso pin conencted to SD Card
+ * @param sclk SPI sclk pin connected to SD Card
+ * @param cs DigitalOut pin used as SD Card chip select
+ * @param name The name used to access the virtual filesystem
+ */
+ SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
+ virtual int disk_initialize();
+ virtual int disk_write(const char *buffer, int block_number);
+ virtual int disk_read(char *buffer, int block_number);
+ virtual int disk_status();
+ virtual int disk_sync();
+ virtual int disk_sectors();
+
+
+protected:
+
+ int _cmd(int cmd, int arg);
+ int _cmdx(int cmd, int arg);
+ int _cmd8();
+ int _cmd58();
+ int initialise_card();
+ int initialise_card_v1();
+ int initialise_card_v2();
+
+ int _read(char *buffer, int length);
+ int _write(const char *buffer, int length);
+ int _sd_sectors();
+ int _sectors;
+
+ SPI _spi;
+ DigitalOut _cs;
+ int cdv;
+};
+
+#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SDHCFileSystem_copy.h Thu Nov 25 14:59:16 2010 +0000
@@ -0,0 +1,86 @@
+/* mbed SDFileSystem Library, for providing file access to SD cards
+ * Copyright (c) 2008-2010, sford
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MBED_SDHCFILESYSTEM_H
+#define MBED_SDHCFILESYSTEM_H
+
+#include "mbed.h"
+#include "FATFileSystem.h"
+
+/* Double Words */
+typedef unsigned long long uint64_t;
+typedef long long sint64_t;
+
+/** Access the filesystem on an SD Card using SPI
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "SDFileSystem.h"
+ *
+ * SDFileSystem sd(p5, p6, p7, p12, "sd"); // mosi, miso, sclk, cs
+ *
+ * int main() {
+ * FILE *fp = fopen("/sd/myfile.txt", "w");
+ * fprintf(fp, "Hello World!\n");
+ * fclose(fp);
+ * }
+ */
+class SDFileSystem : public FATFileSystem {
+public:
+
+ /** Create the File System for accessing an SD Card using SPI
+ *
+ * @param mosi SPI mosi pin connected to SD Card
+ * @param miso SPI miso pin conencted to SD Card
+ * @param sclk SPI sclk pin connected to SD Card
+ * @param cs DigitalOut pin used as SD Card chip select
+ * @param name The name used to access the virtual filesystem
+ */
+ SDFileSystem(PinName mosi, PinName miso, PinName sclk, PinName cs, const char* name);
+ virtual int disk_initialize();
+ virtual int disk_write(const char *buffer, int block_number);
+ virtual int disk_read(char *buffer, int block_number);
+ virtual int disk_status();
+ virtual int disk_sync();
+ virtual int disk_sectors();
+
+protected:
+
+ int _cmd(int cmd, int arg);
+ int _cmdx(int cmd, int arg);
+ int _cmd8();
+ int _cmd58();
+ int initialise_card();
+ int initialise_card_v1();
+ int initialise_card_v2();
+
+ int _read(char *buffer, int length);
+ int _write(const char *buffer, int length);
+ int _sd_sectors();
+ int _sectors;
+
+ SPI _spi;
+ DigitalOut _cs;
+ int cdv;
+};
+
+#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Thu Nov 25 14:59:16 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#a53b3e2d6f1e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Thu Nov 25 14:59:16 2010 +0000
@@ -0,0 +1,185 @@
+#include "mbed.h"
+//#define USE_TextLCD_20x4
+#define USE_FIXED_IP
+
+////////////////////////////////////////
+//////// For Waveplayer ////////
+////////////////////////////////////////
+//Place suitable uncompressed wav files with 8 or 16 bit sample sizes on the SD card and ensure the
+//file names are 8.3 format. Then change the main method below to the relevant file paths.
+#include "wavplayer.h"
+
+
+////////////////////////////////////////
+//////// general setting ////////
+////////////////////////////////////////
+//#define USE_TextLCD_20x4
+#define USE_FIXED_IP
+
+////////////////////////////////////////
+//////// For TextLCD ////////
+////////////////////////////////////////
+#include "TextLCD.h"
+#ifdef USE_TextLCD_20x4
+//TextLCD lcd( p24, p26, p27, p28, p29, p30, TextLCD::LCD20x4 ); // rs, e, d0-d3
+#else
+TextLCD lcd( p24, p26, p27, p28, p29, p30 ); // rs, e, d0-d3
+#endif
+
+////////////////////////////////////////
+//////// For SD_card ////////
+////////////////////////////////////////
+#include "SDHCFileSystem.h"
+//SDFileSystem sd(p5, p6, p7, p13, "sd"); // mosi, miso, sclk, cs, name
+SDFileSystem sd(p5, p6, p7, p8, "sd"); // mosi, miso, sclk, cs, name (HW modification candidate)
+
+////////////////////////////////////////
+//////// For USB storage ////////
+////////////////////////////////////////
+//#include "MSCFileSystem.h"
+//MSCFileSystem usb("usb");
+
+////////////////////////////////////////
+//////// For Ethernet test ////////
+////////////////////////////////////////
+#include "EthernetNetIf.h"
+#include "HTTPServer.h"
+#ifdef USE_FIXED_IP
+EthernetNetIf eth(
+ IpAddr(192,168,0,20), //IP Address
+ IpAddr(255,255,255,0), //Network Mask
+ IpAddr(192,168,0,1), //Gateway
+ IpAddr(192,168,0,1) //DNS
+);
+#else
+ EthernetNetIf eth;
+#endif
+HTTPServer svr;
+LocalFileSystem web("local");
+
+
+void test_TextLCD( void );
+void test_file_write( char *title, char *path );
+void test_httpserver( void );
+int position( void );
+
+ DigitalOut led1(LED1);
+ DigitalOut led4(LED4);
+
+
+int main() {
+ WavPlayer myWavPlayer;
+ led1 = 1 ;
+ printf("\r\n--------------- Starting -----------------\r\n");
+
+ test_TextLCD();
+ wait( 1 );
+ test_file_write( "SD card", "/sd/star_bd.txt" );
+ wait( 1 );
+ //test_file_write( "USB storage", "/usb/star_bd.txt" );
+ wait( 1 );
+ //test_httpserver();
+ myWavPlayer.play_wave("/sd/startup.wav"); // 8 bit sample size
+ printf("<<<<<<<<<<<<<<<< All done >>>>>>>>>>>>>>>>\r\n");
+ led1 = 0;
+ led4 = 1;
+
+}
+
+
+void test_TextLCD( void ) {
+ // TextLCD test
+
+#ifdef USE_TextLCD_20x4
+ lcd.locate( 0, 0 );
+ for ( int i = 0, c = '0'; i < 20; i++, c++ )
+ lcd.putc( c );
+
+ for ( int i = 0, c = 'A'; i < 20; i++, c++ )
+ lcd.putc( c );
+
+ for ( int i = 0, c = 'a'; i < 20; i++, c++ )
+ lcd.putc( c );
+ for ( int i = 0, c = '0' - 10; i < 20; i++, c++ )
+ lcd.putc( c );
+ exit( 0 );
+ wait( 300 );
+ lcd.cls();
+#endif // USE_TextLCD_20x4
+
+ lcd.locate( 0, 0 );
+ lcd.printf( "TextLCD: OK?" );
+ lcd.locate( 0, 1 );
+ lcd.printf( "" );
+
+}
+
+void test_file_write( char *title, char *path ) {
+ // SD card test
+ lcd.locate( 0, position() );
+ lcd.printf( "%s: ", title );
+
+ FILE *fp = fopen( path, "w" );
+ if ( fp == NULL ) {
+ lcd.printf( "error" );
+ error( "Could not open file for write\n" );
+ }
+ fprintf( fp, "The mbed writing a file through the star board orange (%s)!", title );
+ fclose( fp );
+
+ lcd.printf( "OK." );
+}
+
+
+void test_httpserver( void ) {
+ DigitalOut led1( LED1 );
+ lcd.locate( 0, position() );
+ lcd.printf( "HTTP srv: " );
+
+ Base::add_rpc_class<DigitalOut>();
+
+ printf("Setting up...n");
+ EthernetErr ethErr = eth.setup();
+ if ( ethErr ) {
+ lcd.printf( "error" );
+ error( "error @ eth.setup()\n" );
+ }
+ lcd.printf("OK ");
+
+ FSHandler::mount("/local", "/"); //Mount /webfs path on web root path
+ FSHandler::mount("/sd", "/sd"); //Mount /webfs path on web sd path
+ //FSHandler::mount("/usb", "/usb"); //Mount /webfs path on web usb path
+
+ svr.addHandler<FSHandler>("/"); //Default handler
+ svr.addHandler<FSHandler>("/sd");
+ //svr.addHandler<FSHandler>("/usb");
+ //Example : Access to mbed.htm : http://a.b.c.d/mbed.htm or http://a.b.c.d/files/mbed.htm
+
+ svr.bind(80);
+
+ lcd.locate( 5, position() -1 );
+ lcd.printf("Listening");
+
+ Timer tm;
+ tm.start();
+ //Listen indefinitely
+ while (true) {
+ Net::poll();
+ if (tm.read()>.5) {
+ led1=!led1; //Show that we are alive
+ tm.start();
+ }
+ }
+}
+
+
+int position( void ) {
+ static int p = 0;
+
+#ifdef USE_TextLCD_20x4
+ return( ++p % 4 );
+#else
+ return( ++p % 2 );
+#endif
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Thu Nov 25 14:59:16 2010 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wavplayer.cpp Thu Nov 25 14:59:16 2010 +0000
@@ -0,0 +1,153 @@
+/*
+ Library wave file player by Tom Coxon
+
+ Based on WAVEplayer by Vlad Cazan/Stephan Rochon modified by Tom Coxon to:
+
+ 1. Run correctly on the Embedded Artists LPCXpresso baseboard.
+ 2. To play 8 bit sample size in addition to original 16 bit
+ 3. To be more fault tolerant when playing wav files.
+*/
+
+#include "wavplayer.h"
+
+Ticker tick;
+
+AnalogOut DACout(p18);
+
+void WavPlayer::dac_out() {
+ if (DAC_on) {
+ DACout.write_u16(DAC_fifo[DAC_rptr]);
+ DAC_rptr=(DAC_rptr+1) & 0xff;
+ }
+}
+
+//void play_wave(char *wavname) {
+void WavPlayer::play_wave(char *wavname) {
+ unsigned chunk_id,chunk_size,channel;
+ unsigned data,samp_int,i;
+ short dac_data;
+ char *slice_buf;
+ short *data_sptr;
+ FMT_STRUCT wav_format;
+ FILE *wavfile;
+ long slice,num_slices;
+ DAC_wptr=0;
+ DAC_rptr=0;
+
+ size_t result;
+
+ for (i=0;i<256;i+=2) {
+ DAC_fifo[i]=0;
+ DAC_fifo[i+1]=3000;
+ }
+ DAC_wptr=4;
+ DAC_on=0;
+
+ printf("Playing wave file '%s'\r\n",wavname);
+
+ wavfile=fopen(wavname,"rb");
+ if (!wavfile) {
+ printf("Unable to open wav file '%s'\r\n",wavname);
+ exit(1);
+ }
+
+ fread(&chunk_id,4,1,wavfile);
+ fread(&chunk_size,4,1,wavfile);
+ while (!feof(wavfile)) {
+ printf("Read chunk ID 0x%x, size 0x%x\r\n",chunk_id,chunk_size);
+ switch (chunk_id) {
+ case 0x46464952:
+ fread(&data,4,1,wavfile);
+ printf("RIFF chunk\r\n");
+ printf(" chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+ printf(" RIFF type 0x%x\r\n",data);
+ break;
+ case 0x20746d66:
+ fread(&wav_format,sizeof(wav_format),1,wavfile);
+ printf("FORMAT chunk\r\n");
+ printf(" chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+ printf(" compression code %d\r\n",wav_format.comp_code);
+ printf(" %d channels\r\n",wav_format.num_channels);
+ printf(" %d samples/sec\r\n",wav_format.sample_rate);
+ printf(" %d bytes/sec\r\n",wav_format.avg_Bps);
+ printf(" block align %d\r\n",wav_format.block_align);
+ printf(" %d bits per sample\r\n",wav_format.sig_bps);
+ if (chunk_size > sizeof(wav_format))
+ fseek(wavfile,chunk_size-sizeof(wav_format),SEEK_CUR);
+// create a slice buffer large enough to hold multiple slices
+ slice_buf=(char *)malloc(wav_format.block_align*SLICE_BUF_SIZE);
+ if (!slice_buf) {
+ printf("Unable to malloc slice buffer");
+ exit(1);
+ }
+ break;
+ case 0x61746164:
+ slice_buf=(char *)malloc(wav_format.block_align*SLICE_BUF_SIZE);
+ if (!slice_buf) {
+ printf("Unable to malloc slice buffer");
+ exit(1);
+ }
+ num_slices=chunk_size/wav_format.block_align;
+ printf("DATA chunk\r\n");
+ printf(" chunk size %d (0x%x)\r\n",chunk_size,chunk_size);
+ printf(" %d slices\r\n",num_slices);
+ printf(" Ideal sample interval=%d\r\n",(unsigned)(1000000.0/wav_format.sample_rate));
+ samp_int=1000000/(wav_format.sample_rate);
+ printf(" programmed interrupt tick interval=%d\r\n",samp_int);
+
+// starting up ticker to write samples out -- no printfs until tick.detach is called
+ tick.attach_us(this,&WavPlayer::dac_out, samp_int);
+ DAC_on=1;
+ for (slice=0;slice<num_slices;slice+=SLICE_BUF_SIZE) {
+
+ result = fread(slice_buf,wav_format.block_align*SLICE_BUF_SIZE,1,wavfile);
+ if (feof(wavfile)) {
+ printf("Oops -- not enough slices in the wave file\r\n");
+
+ break;
+ }
+
+ data_sptr=(short *)slice_buf;
+ for (i=0;i<SLICE_BUF_SIZE;i++) {
+ dac_data=0;
+
+// for a stereo wave file average the two channels.
+ for (channel=0;channel<wav_format.num_channels;channel++) {
+ switch (wav_format.sig_bps) {
+ case 16:
+ dac_data+=( ((int)(*data_sptr++)) +32768 );
+ break;
+ case 8:
+ dac_data+=( ((int)(*data_sptr++)) +32768 <<8);
+ break;
+ }
+ }
+ DAC_fifo[DAC_wptr]=dac_data;
+ DAC_wptr=(DAC_wptr+1) & 0xff;
+ while (DAC_wptr==DAC_rptr) {
+ wait_us(10);
+ }
+ }
+ }
+ DAC_on=0;
+ tick.detach();
+ printf("Ticker detached\r\n");
+ free(slice_buf);
+ break;
+ case 0x5453494c:
+ printf("INFO chunk, size %d\r\n",chunk_size);
+ fseek(wavfile,chunk_size,SEEK_CUR);
+ break;
+ default:
+ printf("unknown chunk type 0x%x, size %d\r\n",chunk_id,chunk_size);
+ data=fseek(wavfile,chunk_size,SEEK_CUR);
+ break;
+ }
+ fread(&chunk_id,4,1,wavfile);
+ fread(&chunk_size,4,1,wavfile);
+ }
+ printf("++++++++++++ Done with wave file ++++++++++\r\n");
+ fclose(wavfile);
+}
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/wavplayer.h Thu Nov 25 14:59:16 2010 +0000
@@ -0,0 +1,51 @@
+/*
+ Library wave file player by Tom Coxon
+
+ Based on WAVEplayer by Vlad Cazan/Stephan Rochon modified by Tom Coxon to:
+
+ 1. Run correctly on the Embedded Artists LPCXpresso baseboard.
+ 2. To play 8 bit sample size in addition to original 16 bit
+ 3. To be more fault tolerant when playing wav files.
+*/
+
+#ifndef WAVPLAYER_H
+#define WAVPLAYER_H
+
+#include "mbed.h"
+
+#define SAMPLE_FREQ 32000
+#define BUF_SIZE (SAMPLE_FREQ/10)
+#define SLICE_BUF_SIZE 1
+
+typedef struct uFMT_STRUCT {
+ short comp_code;
+ short num_channels;
+ unsigned sample_rate;
+ unsigned avg_Bps;
+ short block_align;
+ short sig_bps;
+} FMT_STRUCT;
+
+class WavPlayer {
+
+public:
+
+ void play_wave(char *wavname);
+
+private:
+
+ void cleanup(char *);
+ void fill_adc_buf(short *, unsigned);
+ void swapword(unsigned *);
+
+// a FIFO for the DAC
+ short DAC_fifo[256];
+ short DAC_wptr;
+ short DAC_rptr;
+ short DAC_on;
+
+ void dac_out();
+
+};
+
+#endif