Posted on February 13, 2015 at 03:16i am working on a project with stm32f4 , ov7670 and dm-lcd35rt image output from my camera is doubled and also its colour is greenish following is my register setting
// Clock Settings // xclk 24M pclk 12M
{0x11, 0x00}, //
{0x6b, 0x8a}, //
// check different
{0x3a, 0x08},
{0x3d, 0xc2},
{0x12, 0x15}, // RGB processed set + QVGA set
{0x40, 0xd0}, // output range till 0xFF RGB-565 select
{0x3e, 0x11},
in snapshot mode it works fine but in continuous mode frame overlaps i cant work out why frames are overlaping in such way
on each vsync interrupt i set my lcd cursor to 0,0 apparantly it is not working this way following is my intterupt function
void DCMI_IRQHandler(void)
{
if (DCMI_GetITStatus(DCMI_IT_VSYNC) != RESET)
{
LCD_SetCursor(0,0);
LCD_WriteRAM_Prepare();
DCMI_ClearITPendingBit(DCMI_IT_VSYNC);
}
if (DCMI_GetITStatus(DCMI_IT_LINE) != RESET)
{
DCMI_ClearITPendingBit(DCMI_IT_LINE);
}
if (DCMI_GetITStatus(DCMI_IT_FRAME) != RESET)
{
DCMI_ClearITPendingBit(DCMI_IT_FRAME);
}
if (DCMI_GetITStatus(DCMI_IT_ERR) != RESET)
{
DCMI_ClearITPendingBit(DCMI_IT_ERR);
}
}
image from my lcd output is attached
can any one give me some directions about it?
