Diff: CameraC328.cpp

Revision:

15:49cfda6c547f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CameraC328.cpp	Wed Oct 13 10:45:29 2010 +0000
@@ -0,0 +1,720 @@
+/**
+ * C328-7640 device driver class (Version 0.0.6)
+ * Reference documents: C328-7640 User Manual v3.0 2004.8.19
+ *
+ * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)
+ * http://shinta.main.jp/
+ */
+
+#include "CameraC328.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 Baud19200.)
+ */
+CameraC328::CameraC328(PinName tx, PinName rx, Baud baud) : serial(tx, rx) {
+    serial.baud((int)baud);
+}
+
+/**
+ * Destructor.
+ */
+CameraC328::~CameraC328() {
+}
+
+/**
+ * Make a sync. for baud rate.
+ */
+CameraC328::ErrorNumber CameraC328::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 ct Color type.
+ * @param rr Raw resolution.
+ * @param jr JPEG resolution.
+ */
+CameraC328::ErrorNumber CameraC328::init(ColorType ct, RawResolution rr, JpegResolution jr) {
+    WAITIDLE();
+    ErrorNumber en;
+
+    en = sendInitial(ct, rr, 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;
+}
+
+/**
+ * Get uncompressed snapshot picture.
+ *
+ * @param func A pointer to a callback function.
+ *             Please do NOT block this callback function.
+ *             Because the camera module transmit image datas continuously.
+ * @return Status of the error.
+ */
+CameraC328::ErrorNumber CameraC328::getUncompressedSnapshotPicture(void(*func)(size_t done, size_t total, char c)) {
+    WAITIDLE();
+    ErrorNumber en;
+
+    en = sendSnapshot(UncompressedPicture, 0);
+    if (NoError != en) {
+        return en;
+    }
+    WAITFUNC();
+    en = recvAckOrNck();
+    if (NoError != en) {
+        return en;
+    }
+
+    en = sendGetPicture(SnapshotPicture);
+    if (NoError != en) {
+        return en;
+    }
+    WAITFUNC();
+    en = recvAckOrNck();
+    if (NoError != en) {
+        return en;
+    }
+
+    /*
+     * image data
+     */
+    DataType dt;
+    uint32_t length = 0;
+    WAITFUNC();
+    en = recvData(&dt, &length);
+    if (NoError != en) {
+        return en;
+    }
+    size_t imgcnt = 0;
+    for (int i = 0; i < (int)length; i++) {
+        char c;
+        WAITFUNC();
+        if (!RECVFUNC(&c, 1)) {
+            return (ErrorNumber)UnexpectedReply;
+        }
+        imgcnt++;
+
+        /*
+         * Call a call back function.
+         * Please do not block this function.
+         */
+        func(imgcnt, length, c);
+    }
+
+    /*
+     * ACK
+     */
+    en = sendAck(0x0A, 0x00);
+    if (NoError != en) {
+        return en;
+    }
+
+    return (ErrorNumber)NoError;
+}
+
+/**
+ * Get uncompressed preview picture.
+ *
+ * @param func A pointer to a callback function.
+ *             Please do NOT block this callback function.
+ *             Because the camera module transmit image datas continuously.
+ * @return Status of the error.
+ */
+CameraC328::ErrorNumber CameraC328::getUncompressedPreviewPicture(void(*func)(size_t done, size_t total, char c)) {
+    WAITIDLE();
+    ErrorNumber en;
+
+    en = sendGetPicture(PreviewPicture);
+    if (NoError != en) {
+        return en;
+    }
+    WAITFUNC();
+    en = recvAckOrNck();
+    if (NoError != en) {
+        return en;
+    }
+
+    /*
+     * image data
+     */
+    DataType dt;
+    uint32_t length = 0;
+    WAITFUNC();
+    en = recvData(&dt, &length);
+    if (NoError != en) {
+        return en;
+    }
+    size_t imgcnt = 0;
+    for (int i = 0; i < (int)length; i++) {
+        char c;
+        WAITFUNC();
+        if (!RECVFUNC(&c, 1)) {
+            return (ErrorNumber)UnexpectedReply;
+        }
+        imgcnt++;
+
+        /*
+         * Call a call back function.
+         * Please do not block this function.
+         */
+        func(imgcnt, length, c);
+    }
+
+    /*
+     * ACK
+     */
+    en = sendAck(0x0A, 0x00);
+    if (NoError != en) {
+        return en;
+    }
+
+    return (ErrorNumber)NoError;
+}
+
+/**
+ * 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.
+ */
+CameraC328::ErrorNumber CameraC328::getJpegSnapshotPicture(void(*func)(char *buf, size_t siz)) {
+    WAITIDLE();
+    ErrorNumber en;
+
+    en = sendSnapshot(CompressedPicture, 1);
+    if (NoError != en) {
+        return en;
+    }
+    WAITFUNC();
+    en = recvAckOrNck();
+    if (NoError != en) {
+        return en;
+    }
+
+    en = sendGetPicture(SnapshotPicture);
+    if (NoError != en) {
+        return en;
+    }
+    WAITFUNC();
+    en = recvAckOrNck();
+    if (NoError != en) {
+        return en;
+    }
+
+    /*
+     * Data : snapshot picture
+     */
+    DataType dt;
+    uint32_t length = 0;
+    WAITFUNC();
+    en = recvData(&dt, &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;
+}
+
+/**
+ * Get JPEG preview picture.
+ *
+ * @param func A pointer to a callback function.
+ *             You can block this function until saving the image datas.
+ * @return Status of the error.
+ */
+CameraC328::ErrorNumber CameraC328::getJpegPreviewPicture(void(*func)(char *buf, size_t siz)) {
+    WAITIDLE();
+    ErrorNumber en;
+
+    en = sendGetPicture(JpegPreviewPicture);
+    if (NoError != en) {
+        return en;
+    }
+    WAITFUNC();
+    en = recvAckOrNck();
+    if (NoError != en) {
+        return en;
+    }
+
+    /*
+     * Data : JPEG preview picture
+     */
+    DataType dt;
+    uint32_t length = 0;
+    WAITFUNC();
+    en = recvData(&dt, &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;
+}
+
+CameraC328::ErrorNumber CameraC328::sendInitial(ColorType ct, RawResolution rr, JpegResolution jr) {
+    char send[COMMAND_LENGTH];
+
+    send[0] = 0xAA;
+    send[1] = 0x01;
+    send[2] = 0x00;
+    send[3] = (char)ct;
+    send[4] = (char)rr;
+    send[5] = (char)jr;
+
+    if (!SENDFUNC(send, sizeof(send))) {
+        return (ErrorNumber)SendRegisterTimeout;
+    }
+    return (ErrorNumber)NoError;
+}
+
+CameraC328::ErrorNumber CameraC328::sendGetPicture(PictureType pt) {
+    char send[COMMAND_LENGTH];
+
+    send[0] = 0xAA;
+    send[1] = 0x04;
+    send[2] = (char)pt;
+    send[3] = 0x00;
+    send[4] = 0x00;
+    send[5] = 0x00;
+
+    if (!SENDFUNC(send, sizeof(send))) {
+        return (ErrorNumber)SendRegisterTimeout;
+    }
+    return (ErrorNumber)NoError;
+}
+
+CameraC328::ErrorNumber CameraC328::sendSnapshot(SnapshotType st, uint16_t skipFrames) {
+    char send[COMMAND_LENGTH];
+    send[0] = 0xAA;
+    send[1] = 0x05;
+    send[2] = (char)st;
+    send[3] = (skipFrames >> 0) & 0xff;
+    send[4] = (skipFrames >> 8) & 0xff;
+    send[5] = 0x00;
+
+    if (!SENDFUNC(send, sizeof(send))) {
+        return (ErrorNumber)SendRegisterTimeout;
+    }
+    return (ErrorNumber)NoError;
+}
+
+CameraC328::ErrorNumber CameraC328::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;
+}
+
+CameraC328::ErrorNumber CameraC328::sendSetBaudrate(Baud baud) {
+    char send[COMMAND_LENGTH];
+
+    static struct baud_list {
+        Baud baud;
+        uint8_t div1st;
+        uint8_t div2nd;
+    } baudtable [] = {
+        { Baud7200, 0xff, 0x01 },
+        { Baud9600, 0xbf, 0x01 },
+        { Baud14400, 0x7f, 0x01 },
+        { Baud19200, 0x5f, 0x01 },
+        { Baud28800, 0x3f, 0x01 },
+        { Baud38400, 0x2f, 0x01 },
+        { Baud57600, 0x1f, 0x01 },
+        { Baud115200, 0x0f, 0x01 }
+    };
+
+    uint8_t div1st = 0x00, div2nd = 0x00;
+    struct baud_list *p = &baudtable[0];
+    for (int i = 0; i < sizeof(baudtable) / sizeof(baudtable[0]); i++) {
+        if (p->baud == baud) {
+            div1st = p->div1st;
+            div2nd = p->div2nd;
+        }
+        p++;
+    }
+
+    send[0] = 0xAA;
+    send[1] = 0x07;
+    send[2] = div1st;
+    send[3] = div2nd;
+    send[4] = 0x00;
+    send[5] = 0x00;
+
+    if (!SENDFUNC(send, sizeof(send))) {
+        return (ErrorNumber)SendRegisterTimeout;
+    }
+
+    return (ErrorNumber)NoError;
+}
+
+CameraC328::ErrorNumber CameraC328::sendReset(ResetType rt, bool specialReset) {
+    char send[COMMAND_LENGTH];
+    send[0] = 0xAA;
+    send[1] = 0x08;
+    send[2] = (int)rt;
+    send[3] = 0x00;
+    send[4] = 0x00;
+    send[5] = specialReset ? 0xff : 0x00;
+    /*
+     * 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;
+}
+
+CameraC328::ErrorNumber CameraC328::sendPowerOff() {
+    char send[COMMAND_LENGTH];
+    send[0] = 0xAA;
+    send[1] = 0x09;
+    send[2] = 0x00;
+    send[3] = 0x00;
+    send[4] = 0x00;
+    send[5] = 0x00;
+
+    if (!SENDFUNC(send, sizeof(send))) {
+        return (ErrorNumber)SendRegisterTimeout;
+    }
+
+    return (ErrorNumber)NoError;
+}
+
+CameraC328::ErrorNumber CameraC328::recvData(DataType *dt, 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;
+    }
+    *dt = (DataType)recv[2];
+    *length = (recv[5] << 16) | (recv[4] << 8) | (recv[3] << 0);
+    return (ErrorNumber)NoError;
+}
+
+CameraC328::ErrorNumber CameraC328::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;
+}
+
+CameraC328::ErrorNumber CameraC328::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.
+ */
+CameraC328::ErrorNumber CameraC328::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.
+ */
+CameraC328::ErrorNumber CameraC328::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 CameraC328::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 CameraC328::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 CameraC328::waitRecv() {
+    while (!serial.readable()) {
+    }
+    return true;
+}
+
+/**
+ * Wait idle state.
+ */
+bool CameraC328::waitIdle() {
+    while (serial.readable()) {
+        serial.getc();
+    }
+    return true;
+}