エレキジャック Web版 マイコン・カーを製作してみよう<21> マイコンカー制御プログラムです。http://www.eleki-jack.com/arm/2012/10/21.html このプログラムは次回の記事でアップされるパソコン用プログラムを使ってマイコンカーを制御するプログラムです。マイコンカーとパソコンの通信はXbeeを使っています。
Revision 0:6eaa311b9d3b, committed 2012-05-05
- Comitter:
- sunifu
- Date:
- Sat May 05 11:37:25 2012 +0000
- Child:
- 1:8f2a9b48a9e0
- Commit message:
- rev0.0.1
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CameraC1098.cpp Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,454 @@ +/** + * C1098-SS device driver class (Version 1.0) + * Reference documents: C1098-SS User Manual v1.0 2012.4.1 + * + * CameraC328Library + * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems) + * http://shinta.main.jp/ + * + * CameraC1098-SS Library + * Copyright (C) 2012 Tadao Iida + */ + +#include "CameraC1098.h" + +#define WAITIDLE waitIdle +#define SENDFUNC sendBytes +#define RECVFUNC recvBytes +#define WAITFUNC waitRecv + +/** + * Constructor. + * + * @param tx A pin for transmit. + * @param rx A pin for receive. + * @param baud Baud rate. (Default is Baud14400.) + */ +CameraC1098::CameraC1098(PinName tx, PinName rx, Baud baud) : serial(tx, rx) { + serial.baud((int)baud); +} + +/** + * Destructor. + */ +CameraC1098::~CameraC1098() { +} + +/** + * Make a sync. for baud rate. + */ +CameraC1098::ErrorNumber CameraC1098::sync() { + WAITIDLE(); + + for (int i = 0; i < SYNCMAX; i++) { + if (NoError == sendSync()) { + if (NoError == recvAckOrNck()) { + if (NoError == recvSync()) { + if (NoError == sendAck(0x0D, 0x00)) { + /* + * After synchronization, the camera needs a little time for AEC and AGC to be stable. + * Users should wait for 1-2 seconds before capturing the first picture. + */ + wait(2); + return NoError; + } + } + } + } + wait_ms(50); + } + return UnexpectedReply; +} + +/** + * Initialize. + * + * @param baud Camera Interface Speed. + * @param jr JPEG resolution. + */ +CameraC1098::ErrorNumber CameraC1098::init(Baud baud,JpegResolution jr) { + ErrorNumber en; + WAITIDLE(); + for (int i = 2 ; i <= 7 ; i++) { + if (NoError == sendSync()) { + if (NoError == recvAckOrNck()) { + if (NoError == recvSync()) { + if (NoError == sendAck(0x0D, 0x00)) { + en = sendInitial((Baud)i, jr); + if (NoError != en) { + return en; + } + WAITFUNC(); + en = recvAckOrNck(); + if (NoError != en) { + return en; + } + + static bool alreadySetupPackageSize = false; + if (!alreadySetupPackageSize) { + en = sendSetPackageSize(packageSize); + if (NoError != en) { + return en; + } + WAITFUNC(); + en = recvAckOrNck(); + if (NoError != en) { + return en; + } + alreadySetupPackageSize = true; + } + + return (ErrorNumber)NoError; + } + } + } + } + wait_ms(50); + } + return UnexpectedReply; +} + + +/** + * Get JPEG snapshot picture. + * + * @param func A pointer to a callback function. + * You can block this function until saving the image datas. + * @return Status of the error. + */ +CameraC1098::ErrorNumber CameraC1098::getJpegSnapshotPicture(void(*func)(char *buf, size_t siz)) { + WAITIDLE(); + ErrorNumber en; + + en = sendSnapshot(); + if (NoError != en) { + return en; + } + WAITFUNC(); + en = recvAckOrNck(); + if (NoError != en) { + return en; + } + + en = sendGetPicture(); + if (NoError != en) { + return en; + } + WAITFUNC(); + en = recvAckOrNck(); + if (NoError != en) { + return en; + } + + /* + * Data : snapshot picture + */ + uint32_t length = 0; + WAITFUNC(); + en = recvData(&length); + if (NoError != en) { + return en; + } + en = sendAck(0x00, 0); + if (NoError != en) { + return en; + } + + char databuf[packageSize - 6]; + uint16_t pkg_total = length / (packageSize - 6); + for (int i = 0; i <= (int)pkg_total; i++) { + uint16_t checksum = 0; + // ID. + char idbuf[2]; + WAITFUNC(); + if (!RECVFUNC(idbuf, sizeof(idbuf))) { + return (ErrorNumber)UnexpectedReply; + } + checksum += idbuf[0]; + checksum += idbuf[1]; + uint16_t id = (idbuf[1] << 8) | (idbuf[0] << 0); + if (id != i) { + return (ErrorNumber)UnexpectedReply; + } + + // Size of the data. + char dsbuf[2]; + WAITFUNC(); + if (!RECVFUNC(dsbuf, sizeof(dsbuf))) { + return (ErrorNumber)UnexpectedReply; + } + + // Received the data. + checksum += dsbuf[0]; + checksum += dsbuf[1]; + uint16_t ds = (dsbuf[1] << 8) | (dsbuf[0] << 0); + WAITFUNC(); + if (!RECVFUNC(&databuf[0], ds)) { + return (ErrorNumber)UnexpectedReply; + } + for (int j = 0; j < ds; j++) { + checksum += databuf[j]; + } + + // Verify code. + char vcbuf[2]; + WAITFUNC(); + if (!RECVFUNC(vcbuf, sizeof(vcbuf))) { + return (ErrorNumber)UnexpectedReply; + } + uint16_t vc = (vcbuf[1] << 8) | (vcbuf[0] << 0); + if (vc != (checksum & 0xff)) { + return (ErrorNumber)UnexpectedReply; + } + + /* + * Call a call back function. + * You can block this function while working. + */ + func(databuf, ds); + + /* + * We should wait for camera working before reply a ACK. + */ + wait_ms(100); + en = sendAck(0x00, 1 + i); + if (NoError != en) { + return en; + } + } + + return (ErrorNumber)NoError; +} + + + +CameraC1098::ErrorNumber CameraC1098::sendInitial(Baud baud, JpegResolution jr) { + char send[COMMAND_LENGTH]; + + send[0] = 0xAA; + send[1] = 0x01; + send[2] = (int)baud; + send[3] = 0x07; + send[4] = 0x00; + send[5] = (char)jr; + + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + return (ErrorNumber)NoError; +} + +CameraC1098::ErrorNumber CameraC1098::sendGetPicture(void) { + char send[COMMAND_LENGTH]; + + send[0] = 0xAA; + send[1] = 0x04; + send[2] = 0x01; + send[3] = 0x00; + send[4] = 0x00; + send[5] = 0x00; + + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + return (ErrorNumber)NoError; +} + +CameraC1098::ErrorNumber CameraC1098::sendSnapshot(void) { + char send[COMMAND_LENGTH]; + send[0] = 0xAA; + send[1] = 0x05; + send[2] = 0x00; + send[3] = 0x00; + send[4] = 0x00; + send[5] = 0x00; + + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + return (ErrorNumber)NoError; +} + +CameraC1098::ErrorNumber CameraC1098::sendSetPackageSize(uint16_t packageSize) { + char send[COMMAND_LENGTH]; + send[0] = 0xAA; + send[1] = 0x06; + send[2] = 0x08; + send[3] = (packageSize >> 0) & 0xff; + send[4] = (packageSize >> 8) & 0xff; + send[5] = 0x00; + + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + return (ErrorNumber)NoError; +} + +void CameraC1098::setmbedBaud(Baud baud) { + serial.baud((int)baud); +} + + +CameraC1098::ErrorNumber CameraC1098::sendReset(ResetType specialReset) { + char send[COMMAND_LENGTH]; + send[0] = 0xAA; + send[1] = 0x08; + send[2] = 0x00; + send[3] = 0x00; + send[4] = 0x00; + send[5] = specialReset; + /* + * Special reset : If the parameter is 0xFF, the command is a special Reset command and the firmware responds to it immediately. + */ + + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + + return (ErrorNumber)NoError; +} + + +CameraC1098::ErrorNumber CameraC1098::recvData(uint32_t *length) { + char recv[COMMAND_LENGTH]; + if (!RECVFUNC(recv, sizeof(recv))) { + return (ErrorNumber)UnexpectedReply; + } + if ((0xAA != recv[0]) || (0x0A != recv[1])) { + return (ErrorNumber)UnexpectedReply; + } + recv[2] = 0x01; + *length = (recv[5] << 16) | (recv[4] << 8) | (recv[3] << 0); + return (ErrorNumber)NoError; +} + +CameraC1098::ErrorNumber CameraC1098::sendSync() { + char send[COMMAND_LENGTH]; + send[0] = 0xAA; + send[1] = 0x0D; + send[2] = 0x00; + send[3] = 0x00; + send[4] = 0x00; + send[5] = 0x00; + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + return (ErrorNumber)NoError; +} + +CameraC1098::ErrorNumber CameraC1098::recvSync() { + char recv[COMMAND_LENGTH]; + if (!RECVFUNC(recv, sizeof(recv))) { + return (ErrorNumber)UnexpectedReply; + } + if ((0xAA != recv[0]) || (0x0D != recv[1])) { + return (ErrorNumber)UnexpectedReply; + } + return (ErrorNumber)NoError; +} + +/** + * Send ACK. + * + * @param commandId The command with that ID is acknowledged by this command. + * @param packageId For acknowledging Data command, these two bytes represent the requested package ID. While for acknowledging other commands, these two bytes are set to 00h. + */ +CameraC1098::ErrorNumber CameraC1098::sendAck(uint8_t commandId, uint16_t packageId) { + char send[COMMAND_LENGTH]; + send[0] = 0xAA; + send[1] = 0x0E; + send[2] = commandId; + send[3] = 0x00; // ACK counter is not used. + send[4] = (packageId >> 0) & 0xff; + send[5] = (packageId >> 8) & 0xff; + if (!SENDFUNC(send, sizeof(send))) { + return (ErrorNumber)SendRegisterTimeout; + } + return (ErrorNumber)NoError; +} + +/** + * Receive ACK or NCK. + * + * @return Error number. + */ +CameraC1098::ErrorNumber CameraC1098::recvAckOrNck() { + char recv[COMMAND_LENGTH]; + if (!RECVFUNC(recv, sizeof(recv))) { + return (ErrorNumber)UnexpectedReply; + } + if ((0xAA == recv[0]) && (0x0E == recv[1])) { + return (ErrorNumber)NoError; + } + if ((0xAA == recv[0]) && (0x0F == recv[1])) { + return (ErrorNumber)recv[4]; + } + return (ErrorNumber)UnexpectedReply; +} + +/** + * Send bytes to camera module. + * + * @param buf Pointer to the data buffer. + * @param len Length of the data buffer. + * + * @return True if the data sended. + */ +bool CameraC1098::sendBytes(char *buf, size_t len, int timeout_us) { + for (uint32_t i = 0; i < (uint32_t)len; i++) { + int cnt = 0; + while (!serial.writeable()) { + wait_us(1); + cnt++; + if (timeout_us < cnt) { + return false; + } + } + serial.putc(buf[i]); + } + return true; +} + +/** + * Receive bytes from camera module. + * + * @param buf Pointer to the data buffer. + * @param len Length of the data buffer. + * + * @return True if the data received. + */ +bool CameraC1098::recvBytes(char *buf, size_t len, int timeout_us) { + for (uint32_t i = 0; i < (uint32_t)len; i++) { + int cnt = 0; + while (!serial.readable()) { + wait_us(1); + cnt++; + if (timeout_us < cnt) { + return false; + } + } + buf[i] = serial.getc(); + } + return true; +} + +/** + * Wait received. + * + * @return True if the data received. + */ +bool CameraC1098::waitRecv() { + while (!serial.readable()) { + } + return true; +} + +/** + * Wait idle state. + */ +bool CameraC1098::waitIdle() { + while (serial.readable()) { + serial.getc(); + } + return true; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/CameraC1098.h Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,129 @@ +/** + * C1098-SS device driver class (Version 1.0) + * Reference documents: C1098-SS User Manual v1.0 2012.4.1 + * + * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems) + * http://shinta.main.jp/ + * + * Copyright (C) 2012 Tadao Iida + */ + +#include "mbed.h" +#include "SerialBuffered.h" + +#ifndef _CAMERA_C1098_H_ +#define _CAMERA_C1098_H_ + +/* + * Class: CameraC1098 + */ + +class CameraC1098 { +public: + + /** + * JPEG resolution. + */ + enum JpegResolution { + JpegResolution80x64 = 0x01, // unofficial + JpegResolution160x128 = 0x03, // unofficial + JpegResolution320x240 = 0x05, // QVGA + JpegResolution640x480 = 0x07 // VGA + }; + + /** + * Error number. + */ + enum ErrorNumber { + NoError = 0x00, + UnexpectedReply = 0x04, + ParameterError = 0x0b, + SendRegisterTimeout = 0x0c, + CommandIdError = 0x0d, + CommandHeaderError = 0xf0, + SetTransferPackageSizeWrong = 0x11 + }; + + /** + * Baud rate. + */ + enum Baud { + Baud460800 = 460800, + Baud230400 = 230400, + Baud115200 = 115200, + Baud57600 = 57600, + Baud28800 = 28800, + Baud14400 = 14400 // Default. + }; + + /** + * Reset type. + */ + enum ResetType { + Nomal = 0x00, + High = 0xff + }; + + /** + * Constructor. + * + * @param tx A pin for transmit. + * @param rx A pin for receive. + * @param baud Baud rate. (Default is Baud19200.) + */ + CameraC1098(PinName tx, PinName rx, Baud baud = Baud14400); + + /** + * Destructor. + */ + ~CameraC1098(); + + /** + * Make a sync. for baud rate. + */ + ErrorNumber sync(); + + /** + * Initialize. + * + * @param baud Camera Interface Speed. + * @param jr JPEG resolution. + */ + ErrorNumber init(Baud baud, JpegResolution jr); + + /** + * Get JPEG snapshot picture. + * + * @param func A pointer to a callback function. + * You can block this function until saving the image datas. + * @return Status of the error. + */ + ErrorNumber getJpegSnapshotPicture(void(*func)(char *buf, size_t siz)); + + ErrorNumber sendReset(ResetType specialReset); + void setmbedBaud(Baud baud); + +private: + SerialBuffered serial; + static const int COMMAND_LENGTH = 6; + static const int SYNCMAX = 60; + static const int packageSize = 256; + + ErrorNumber sendInitial(Baud band, JpegResolution jr); + ErrorNumber sendGetPicture(void); + ErrorNumber sendSnapshot(void); + ErrorNumber sendSetPackageSize(uint16_t packageSize); + + ErrorNumber recvData(uint32_t *length); + ErrorNumber sendSync(); + ErrorNumber recvSync(); + ErrorNumber sendAck(uint8_t commandId, uint16_t packageId); + ErrorNumber recvAckOrNck(); + + bool sendBytes(char *buf, size_t len, int timeout_us = 20000); + bool recvBytes(char *buf, size_t len, int timeout_us = 20000); + bool waitRecv(); + bool waitIdle(); +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FATFileSystem.lib Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.co.uk/projects/libraries/svn/FATFileSystem/trunk@22 \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.cpp Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,457 @@ +/* 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] | + * +------+---------+---------+- - - -+---------+-----------+----------+ + */ + +#include "SDFileSystem.h" + +#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) { + 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++) { + _cmd(55, 0); + if(_cmd(41, 0) == 0) { + _cmd58(); + return SDCARD_V2; + } + } + + fprintf(stderr, "Timeout waiting for v2.x card\n"); + return SDCARD_FAIL; +} + +int SDFileSystem::disk_initialize() { + + int i = initialise_card(); +// printf("init card = %d\n", i); +// printf("OK\n"); + + _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 * 512) != 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 * 512) != 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() { + + // 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); + int c_size = ext_bits(csd, 73, 62); + int c_size_mult = ext_bits(csd, 49, 47); + int read_bl_len = ext_bits(csd, 83, 80); + +// printf("CSD_STRUCT = %d\n", csd_structure); + + if(csd_structure != 0) { + fprintf(stderr, "This disk tastes funny! I only know about type 0 CSD structures\n"); + return 0; + } + + // memory capacity = BLOCKNR * BLOCK_LEN + // where + // BLOCKNR = (C_SIZE+1) * MULT + // MULT = 2^(C_SIZE_MULT+2) (C_SIZE_MULT < 8) + // BLOCK_LEN = 2^READ_BL_LEN, (READ_BL_LEN < 12) + + int block_len = 1 << read_bl_len; + int mult = 1 << (c_size_mult + 2); + int blocknr = (c_size + 1) * mult; + int capacity = blocknr * block_len; + + int blocks = capacity / 512; + + return blocks; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.h Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,81 @@ +/* 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_SDFILESYSTEM_H +#define MBED_SDFILESYSTEM_H + +#include "mbed.h" +#include "FATFileSystem.h" + +/** 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; +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SerialBuffered.cpp Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,99 @@ +#include "mbed.h" +#include "SerialBuffered.h" + +/** + * Create a buffered serial class. + * + * @param tx A pin for transmit. + * @param rx A pin for receive. + */ +SerialBuffered::SerialBuffered(PinName tx, PinName rx) : Serial(tx, rx) { + indexContentStart = 0; + indexContentEnd = 0; + timeout = 1; + attach(this, &SerialBuffered::handleInterrupt); +} + +/** + * Destroy. + */ +SerialBuffered::~SerialBuffered() { +} + +/** + * Set timeout for getc(). + * + * @param ms milliseconds. (-1:Disable timeout) + */ +void SerialBuffered::setTimeout(int ms) { + timeout = ms; +} + +/** + * Read requested bytes. + * + * @param bytes A pointer to a buffer. + * @param requested Length. + * + * @return Readed byte length. + */ +size_t SerialBuffered::readBytes(uint8_t *bytes, size_t requested) { + int i = 0; + while (i < requested) { + int c = getc(); + if (c < 0) { + break; + } + bytes[i] = c; + i++; + } + return i; +} + +/** + * Get a character. + * + * @return A character. (-1:timeout) + */ +int SerialBuffered::getc() { + timer.reset(); + timer.start(); + while (indexContentStart == indexContentEnd) { + wait_ms(1); + if ((timeout > 0) && (timer.read_ms() > timeout)) { + /* + * Timeout occured. + */ + // printf("Timeout occured.\n"); + return EOF; + } + } + timer.stop(); + + uint8_t result = buffer[indexContentStart++]; + indexContentStart = indexContentStart % BUFFERSIZE; + + return result; +} + +/** + * Returns 1 if there is a character available to read, 0 otherwise. + */ +int SerialBuffered::readable() { + return indexContentStart != indexContentEnd; +} + +void SerialBuffered::handleInterrupt() { + while (Serial::readable()) { + if (indexContentStart == ((indexContentEnd + 1) % BUFFERSIZE)) { + /* + * Buffer overrun occured. + */ + // printf("Buffer overrun occured.\n"); + Serial::getc(); + } else { + buffer[indexContentEnd++] = Serial::getc(); + indexContentEnd = indexContentEnd % BUFFERSIZE; + } + } +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SerialBuffered.h Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,61 @@ +#ifndef _SERIAL_BUFFERED_H_ +#define _SERIAL_BUFFERED_H_ + +/** + * Buffered serial class. + */ +class SerialBuffered : public Serial { +public: + /** + * Create a buffered serial class. + * + * @param tx A pin for transmit. + * @param rx A pin for receive. + */ + SerialBuffered(PinName tx, PinName rx); + + /** + * Destroy. + */ + virtual ~SerialBuffered(); + + /** + * Get a character. + * + * @return A character. (-1:timeout) + */ + int getc(); + + /** + * Returns 1 if there is a character available to read, 0 otherwise. + */ + int readable(); + + /** + * Set timeout for getc(). + * + * @param ms milliseconds. (-1:Disable timeout) + */ + void setTimeout(int ms); + + /** + * Read requested bytes. + * + * @param bytes A pointer to a buffer. + * @param requested Length. + * + * @return Readed byte length. + */ + size_t readBytes(uint8_t *bytes, size_t requested); + +private: + void handleInterrupt(); + static const int BUFFERSIZE = 4096; + uint8_t buffer[BUFFERSIZE]; // points at a circular buffer, containing data from m_contentStart, for m_contentSize bytes, wrapping when you get to the end + uint16_t indexContentStart; // index of first bytes of content + uint16_t indexContentEnd; // index of bytes after last byte of content + int timeout; + Timer timer; +}; + +#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,120 @@ +/** + * Test program. + * + * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems) + * http://shinta.main.jp/ + */ + +/* + * Include files. + */ + +#include "mbed.h" +#include "CameraC1098.h" +#include "SDFileSystem.h" + +/* + * Definitions. + */ +#define USE_JPEG_HIGH_RESOLUTION 1 +#define USE_SD_CARD 1 + +/* + * Variables. + */ +static const int CAPTURE_FRAMES = 3; +static const int RAWIMG_X = 80; +static const int RAWIMG_Y = 64; +static char buf[RAWIMG_X * RAWIMG_Y * 2]; +static FILE *fp_jpeg; + +/* + * Modules. + */ +#if USE_SD_CARD +SDFileSystem sd(p5, p6, p7, p8, "fs"); +#else +LocalFileSystem fs("fs"); +#endif + +CameraC1098 camera(p13, p14); + + +/** + * A callback function for jpeg images. + * You can block this function until saving the image datas. + * + * @param buf A pointer to the image buffer. + * @param siz A size of the image buffer. + */ +void jpeg_callback(char *buf, size_t siz) { + for (int i = 0; i < (int)siz; i++) { + fprintf(fp_jpeg, "%c", buf[i]); + } +} + +/** + * Synchronizing. + */ +void sync(void) { + CameraC1098::ErrorNumber err = CameraC1098::NoError; + + err = camera.sync(); + if (CameraC1098::NoError == err) { + printf("[ OK ] : CameraC1098::sync\r\n"); + } else { + printf("[FAIL] : CameraC1098::sync (Error=%02X)\r\n", (int)err); + } +} + + +/** + * A test function for jpeg snapshot picture. + */ +void test_jpeg_snapshot_picture(void) { + CameraC1098::ErrorNumber err = CameraC1098::NoError; + for (int i = 0; i < CAPTURE_FRAMES; i++) { + char fname[64]; + snprintf(fname, sizeof(fname), "/fs/jpss%04d.jpg", i); + fp_jpeg = fopen(fname, "w"); + + err = camera.getJpegSnapshotPicture(jpeg_callback); + + if (CameraC1098::NoError == err) { + printf("[ OK ] : CameraC1098::getJpegSnapshotPicture\r\n"); + } else { + printf("[FAIL] : CameraC1098::getJpegSnapshotPicture (Error=%02X)\r\n", (int)err); + } + fclose(fp_jpeg); + } +} + +/** + * A entry point. + */ +int main() { + printf("\r\n"); + printf("==========\r\n"); + printf("CameraC1098\r\n"); + printf("==========\r\n"); + // Camera Reset + sync(); + CameraC1098::ErrorNumber err = CameraC1098::NoError; + +#if USE_JPEG_HIGH_RESOLUTION + err = camera.init(CameraC1098::Baud460800, CameraC1098::JpegResolution640x480); +#else + err = camera.init(CameraC1098::Baud460800, CameraC1098::JpegResolution320x240); +#endif + + if (CameraC1098::NoError == err) { + printf("[ OK ] : CameraC1098::init\r\n"); + } else { + printf("[FAIL] : CameraC1098::init (Error=%02X)\r\n", (int)err); + } + camera.setmbedBaud(CameraC1098::Baud460800); + + test_jpeg_snapshot_picture(); + + return 0; +}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.lib Sat May 05 11:37:25 2012 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/projects/libraries/svn/mbed/trunk@31 \ No newline at end of file