void Camera_Start()
{
Camera_SIOD_SetDriveMode(Camera_SIOD_DM_RES_UP); //turn on pull-up resistors on I2C pins
Camera_SIOC_SetDriveMode(Camera_SIOC_DM_RES_UP);
Camera_I2C_Start();
Camera_WriteReg(0x12,0x80); //reset
CyDelay(1);
uint16 i;
for(i=0;Camera_settings[i][0]!=0xff;i++) Camera_WriteReg(Camera_settings[i][0],Camera_settings[i][1]); //camera settings
for(i=0;Camera_format[i]!=0xff;i++) Camera_WriteReg(Camera_format[i],Camera_qcif[i]); //qcif format (176x144)
uint8 (*buffer)[BUFFER_SIZE]=(uint8(*)[BUFFER_SIZE])Camera_framebuffer; //recast buffer for easier arithmetic
DMA_channel=Camera_DMA_DmaInitialize(1,1,HI16(CYDEV_PERIPH_BASE),HI16(CYDEV_SRAM_BASE)); //peripheral -> SRAM
for(i=0;i<sizeof DMA_TD;i++) //set up TDs
{
DMA_TD[i]=CyDmaTdAllocate();
CyDmaTdSetAddress(DMA_TD[i],LO16(Camera_FIFO_dp__F0_REG),LO16((uint32)buffer[i]));
if(i) CyDmaTdSetConfiguration(DMA_TD[i-1],BUFFER_SIZE,DMA_TD[i],TD_INC_DST_ADR);
}
CyDmaChPriority(DMA_channel,0); //ensure highest priority for DMA channel
}
/*********************************************************************
* Function Name: uint8 Buf0_DmaInitalize
**********************************************************************
* Summary:
* Allocates and initialises a channel of the DMAC to be used by the
* caller.
*
* Parameters:
* BurstCount.
*
*
* ReqestPerBurst.
*
*
* UpperSrcAddress.
*
*
* UpperDestAddress.
*
*
* Return:
* The channel that can be used by the caller for DMA activity.
* DMA_INVALID_CHANNEL (0xFF) if there are no channels left.
*
*
*******************************************************************/
uint8 Buf0_DmaInitialize(uint8 BurstCount, uint8 ReqestPerBurst, uint16 UpperSrcAddress, uint16 UpperDestAddress)
{
/* Allocate a DMA channel. */
Buf0_DmaHandle = (uint8)Buf0__DRQ_NUMBER;
/* Configure the channel. */
(void)CyDmaChSetConfiguration(Buf0_DmaHandle,
BurstCount,
ReqestPerBurst,
(uint8)Buf0__TERMOUT0_SEL,
(uint8)Buf0__TERMOUT1_SEL,
(uint8)Buf0__TERMIN_SEL);
/* Set the extended address for the transfers */
(void)CyDmaChSetExtendedAddress(Buf0_DmaHandle, UpperSrcAddress, UpperDestAddress);
/* Set the priority for this channel */
(void)CyDmaChPriority(Buf0_DmaHandle, (uint8)Buf0__PRIORITY);
return Buf0_DmaHandle;
}
