File content as of revision 40:be98219930e4:

#include "ArduCAM.h"


#include "GlobalVariable.h"
#include "SWUSBServer.h"

#include "CamRegBuf.h"

#include <string>

extern SPI g_spi_port;

DigitalOut cam_cs(PIN_ACC_CS);


inline void ardu_cam_spi_write_8(int address, int value)
{
    // take the SS pin low to select the chip:
    cam_cs = 0;
    //  send in the address and value via SPI:
    g_spi_port.write(address | 0x80);
    g_spi_port.write(value);
    // take the SS pin high to de-select the chip:
    cam_cs = 1;
}
 
inline uint8_t ardu_cam_spi_read_8(int address)
{ 
    // take the SS pin low to select the chip:
    cam_cs = 0;
    //  send in the address and value via SPI:
    g_spi_port.write(address & 0x7F);
    uint8_t value = static_cast<uint8_t>(g_spi_port.write(0x00));
    // take the SS pin high to de-select the chip:
    cam_cs = 1;
    return value;
}
/*
inline void ardu_cam_spi_set_burst()
{
    cam_cs = 0;
    
    g_spi_port.write(BURST_FIFO_READ & 0x7F);
    
    cam_cs = 1;
}

inline uint16_t ardu_cam_spi_burst_read_16()
{
    cam_cs = 0;
    
    uint16_t value = static_cast<uint16_t>(g_spi_port.write(0x00));
    value = (value << 8) & 0xFF00;
    value = value | static_cast<uint16_t>(g_spi_port.write(0x00));
    
    cam_cs = 1;
    return value;
}
*/


bool ardu_cam_init()
{
    char buf[20];
    
    CamRegBuf * camReg = new CamRegBuf(g_core, CAM_SCCB_WRITE, CAM_SCCB_READ);

    camReg->WriteRegSet(ResetProg);
    wait_ms(5);
    camReg->WriteRegSet(QVGA);
    wait_ms(100);
    
#if defined(ARDUCAM_OV2640)
    camReg->SCCBWrite(0xff, 0x01);
#endif
    uint8_t camVer = camReg->SCCBRead(CAM_PID_ADDR);
    sprintf(buf, "Cam VerH %#x", camVer);
    g_core.GetUSBServer().PushReliableMsg('D', buf);
    
    camVer = camReg->SCCBRead(CAM_VER_ADDR);
    sprintf(buf, "Cam VerL %#x", camVer);
    g_core.GetUSBServer().PushReliableMsg('D', buf);


    delete camReg;
    camReg = NULL;
    
    
    
    
    uint8_t VerNum = ardu_cam_spi_read_8(0x40);
    VerNum = ardu_cam_spi_read_8(0x40);
    
    
    sprintf(buf, "Ardu Ver %#x", VerNum);
    g_core.GetUSBServer().PushReliableMsg('D', buf);
    
    ardu_cam_spi_write_8(ARDUCHIP_TEST1, ARDUCHIP_TEST_MSG);
    uint8_t testV = ardu_cam_spi_read_8(ARDUCHIP_TEST1);
    if(VerNum != ARDUCHIP_VER_NUM || testV != ARDUCHIP_TEST_MSG)
    {
        g_core.GetUSBServer().PushReliableMsg('D', "CameraInit Fa");
        return false;
    }
    g_core.GetUSBServer().PushReliableMsg('D', "CameraInit Su");
    
    //ardu_cam_set_mode(MCU2LCD_MODE);
    ardu_cam_start_capture();
    
    wait(0.1);
    
    
    //unsigned char tempV = ardu_cam_read_reg(ARDUCHIP_MODE);
    //sprintf(buf, "Ardu Stat %#x", tempV);
    //g_core.GetUSBServer().PushReliableMsg('D', buf);
    
    //tempV = ardu_cam_read_reg(ARDUCHIP_CAP_CTRL);
    //sprintf(buf, "Ardu FS1 %#x", tempV);
    //g_core.GetUSBServer().PushReliableMsg('D', buf);
    
    return true;
}

void ardu_cam_start_capture()
{
    ardu_cam_spi_write_8(ARDUCHIP_FIFO, FIFO_CLEAR_MASK);
    ardu_cam_spi_write_8(ARDUCHIP_CAP_CTRL, 0x00);
    ardu_cam_spi_write_8(ARDUCHIP_FIFO, FIFO_START_MASK);
}

uint32_t ardu_cam_get_fifo_length()
{
    uint32_t len1,len2,len3,length=0;
    len1 = ardu_cam_spi_read_8(FIFO_SIZE1);
    len2 = ardu_cam_spi_read_8(FIFO_SIZE2);
    len3 = ardu_cam_spi_read_8(FIFO_SIZE3) & 0x07;
    length = ((len3 << 16) | (len2 << 8) | len1) & 0x07ffff;
    return length;
}

uint8_t ardu_cam_get_pixel()
{
    uint16_t VH = ardu_cam_spi_read_8(SINGLE_FIFO_READ);
    uint16_t VL = ardu_cam_spi_read_8(SINGLE_FIFO_READ);
    //uint16_t VL = ardu_cam_spi_burst_read_16();
    
    VL = (VL & 0x00FF) | ((VH << 8) & 0xFF00);
    uint8_t ch = ((VL & 0xF800) >> 9);// << 2;
    float pixel = (static_cast<float>(ch) * 0.21);
    
    ch = ((VL & 0x07E0) >> 3);// << 2;
    pixel += (static_cast<float>(ch) * 0.72);
    
    ch = (VL & 0x001F) << 2;
    pixel += (static_cast<float>(ch) * 0.07);
    
    return static_cast<uint8_t>(pixel);
}

void ardu_cam_print_debug()
{
    uint32_t len = ardu_cam_get_fifo_length();
    char buf[20];
    sprintf(buf, "Cam L %#x", len);
    g_core.GetUSBServer().PushReliableMsg('D', buf);
    
    //if(len < (RESOLUTION_HEIGHT * RESOLUTION_WIDTH * 2))
    //    return;
    
    //Begin output the picture
    std::string lineBuf;
#if defined(MANUAL_REDUCE_RESULOTION_BY2)
    lineBuf.resize((RESOLUTION_WIDTH / 2) + 1);
#else
    lineBuf.resize(RESOLUTION_WIDTH + 1);
#endif
    
    //ardu_cam_spi_set_burst();
    ardu_cam_get_pixel(); //Get the first dummy pixel
    
    for (uint8_t i = 0; i < RESOLUTION_HEIGHT; ++i)
    {
#if defined(MANUAL_REDUCE_RESULOTION_BY2)
        lineBuf[0] = i / 2;
        
        for (int j = 0; j < RESOLUTION_WIDTH; ++j)
        {
            if(i % 2 == 0 || j % 2 == 0)
            {
                ardu_cam_get_pixel();
            }
            else
            {
                lineBuf[(j / 2) + 1] = ardu_cam_get_pixel();
            }
        }
        
        if(i % 2 == 0)
        {
            
        }
        else
        {
            g_core.GetUSBServer().PushReliableMsg('P', lineBuf);
            wait(0.35);
        }
        
#else

        lineBuf[0] = i;
        
        for (int j = 0; j < RESOLUTION_WIDTH; ++j)
        {
            //uint8_t p = ardu_cam_get_pixel();
            lineBuf[j + 1] = ardu_cam_get_pixel();
        }
        
        g_core.GetUSBServer().PushReliableMsg('P', lineBuf);
        wait(0.35);
        
#endif
        
    }
    
}