Chipscope 仿真VmodCAM IIC程序：
目的：熟悉EDK中建立chipscope
注意：zedboard使用digilent USB下载时，chipscope不能和SDK同时使用，否则芯片会死机。要用仿真器烧写程序。
1：搭建硬件平台
硬件平台如下所示：具体的EDK设计流程参见XILINX大学workshop
搭建后的平台见下图，其中除了IIC和axi总线，其他的都不是必须的外设，并且添加chipscoe。可以根据自己设计添加栓出。然后Export Design，出到到SDK中，编写IIC控制程序
2：编写SDK软件
（IIC控制程序），也就是设置摄像头的寄存器，具体的控制参见DT9 datashhet
配置寄存器
0x30,0x00,0x00,0x00, // Chip version. Default 0x1580 !! only for read !!
0x33,0x86,0x05,0x01, // MCU Reset
0x32,0x90,0x00,0x01, // test pattern
0x32,0x92,0x00,0x00, // R pattern
0x32,0x94,0x00,0xff, // G pattern
0x32,0x96,0x00,0x00, // B pattern
0x33,0x86,0x05,0x00, // MCU Release from reset
0x32,0x14,0x0D,0x85, // Slew rate control, PCLK 5, D 5
0x34,0x1E,0x8F,0x09, // PLL control; bypassed, powered down
0x34,0x1C,0x02,0x30, // PLL dividers; M=80,N=2,fMCLK=fCLKIN*M/(N+1)/8=24MHz
0x34,0x1E,0x8F,0x09, // PLL control; Power-up PLL; wait 1ms after this!
0x34,0x1E,0x8F,0x08, // PLL control; Turn off bypass
0x32,0x02,0x00,0x08, // Standby control; Wake up
0x33,0x8C,0x27,0x97, // Output format; Context B shadow
0x33,0x90,0x00,0x20, // RGB with BT656 codes
0x33,0x8C,0x27,0x2F, // Sensor Row Start Context B
0x33,0x90,0x00,0x04, // 4
0x33,0x8C,0x27,0x33, // Sensor Row End Context B
0x33,0x90,0x04,0xBB, // 1211
0x33,0x8C,0x27,0x31, // Sensor Column Start Context B
0x33,0x90,0x00,0x04, // 4
0x33,0x8C,0x27,0x35, // Sensor Column End Context B
0x33,0x90,0x06,0x4B, // 1611
0x33,0x8C,0x27,0x07, // Output width; Context B
0x33,0x90,0x02,0x80, // 640
0x33,0x8C,0x27,0x09, // Output height; Context B
0x33,0x90,0x01,0xE0, // 480
0x33,0x8C,0x27,0x5F, // Crop X0; Context B
0x33,0x90,0x00,0x00, // 0
0x33,0x8C,0x27,0x63, // Crop Y0; Context B
0x33,0x90,0x00,0x00, // 0
0x33,0x8C,0x27,0x61, // Crop X1; Context B
0x33,0x90,0x06,0x40, // 1600
0x33,0x8C,0x27,0x65, // Crop Y1; Context B
0x33,0x90,0x04,0xB0, // 1200
0x33,0x8C,0x27,0x41, // Sensor_Fine_IT_min B
0x33,0x90,0x01,0x69, // 361
0x33,0x8C,0xA1,0x20, // Capture mode options
0x33,0x90,0x00,0xF2, // Turn on AWB, AE, HG, Video
0x33,0x8C,0xA1,0x03, // Refresh Sequencer Mode
0x33,0x90,0x00,0x02, // Capture
0x33,0x90,0x00,0x00, // Read until sequencer in mode 0 (run)
0x30,0x1A,0x02,0xCC, // reset/output control; parallel enable, drive pins, start streaming
/*****************************************************************************/
/**
* This function is initial the iic_0.
*
* @param None.
*
* @return The number of bytes sent.
*
* @note None.
*
****************************************************************************/ int IIC_Initial( XIic *IicInstance, u16 DeviceId)
{ XIic_Config *IICConfigPtr; /* Pointer to configuration data */
Xil_AssertNonvoid(IicInstance != NULL);
/*
* Initialize the IIC driver so that it is ready to use.
*/
IICConfigPtr = XIic_LookupConfig(DeviceId);
if (IICConfigPtr == (XIic_Config *) NULL) {
IicInstance->IsReady = 0;
return (XST_DEVICE_NOT_FOUND);
}
return XIic_CfgInitialize(IicInstance, IICConfigPtr,IICConfigPtr->BaseAddress); }
int Vmod_CameraA_IIC_Config()
{
unsigned ByteCount=0;
int i = 0;
u8 ReadCamera_ChipVersion_Add[2] = {0x30,0x00};
u8 ReadCamera_ChipVersion_Rdata[2];
u16 Chip_Version = 0; printf("Here we go\n");
printf("Config the Camera\n");
read_camera_config(XPAR_CAMER_IIC_A_BASEADDR,ReadCamera_ChipVersion_Add,ReadCamera_ChipVersion_Rdata);
Chip_Version = (ReadCamera_ChipVersion_Rdata[0] << 8) | ReadCamera_ChipVersion_Rdata[1];
printf("Read Chip Version is:0x%x\n",Chip_Version);
for(i=0;i<MT9D112_CONFIG_BUFFER_ROWS;i++)
{
ByteCount += XIic_Send(XPAR_CAMER_IIC_A_BASEADDR,CAMERA_ADDRESS_ID,MT9D112_CONFIG_BUFFER[i],4,XIIC_STOP);
}
if(MT9D112_CONFIG_BUFFER_ROWS*4 == ByteCount)
{
printf("Camera Initialize success\n");
printf("Camera Initialize ByteCount is:%d\n",ByteCount);
return ByteCount;
}
else printf("Camera Initialize fail\n");
}
void read_camera_config (u32 BaseAddress, u8 *sub_addr, u8 *RdData)
{
u8 sent_byte_count;
u8 received_byte_count; RdData[0] = 0;
RdData[1] = 0; xil_printf("Read\t"); sent_byte_count = XIic_Send(BaseAddress, 0x78>>1, sub_addr, 2, XIIC_STOP); //write sub-address if (sent_byte_count != 2)
xil_printf("Sent %d bytes\t", sent_byte_count); received_byte_count = XIic_Recv(BaseAddress, 0x79>>1, RdData, 2, XIIC_STOP); //read 2 byte datas if (received_byte_count != 2)
xil_printf("Received %d bytes\r\n", received_byte_count);
else
xil_printf("0x%02x 0x%02x\r\n", RdData[0], RdData[1]); }
3:ChipScope 调试
4 VmodCAM
硬件写地址0x78 读地址0x79
访问方式：
1、通过直接的硬件寄存器访问
2、通过驱动变量进行配置，这种配置都是靠R[0X338C]与R[0X3390]两个硬件寄存器间接访问，R[0X338C]是选择驱动变量的寄存器，R[0X3390]则是设置对应驱动变量的值。
图 1 驱动变量地址
供电与复位：
配置操作：
寄存器上电的初始值
首先就可以读取摄像头的ID 地址是R[0X3000],读取的ID应该是0X1580.
然后复位MCU
PLL 时钟配置：
PLL配置包括R[0X341C]用于PLL输出（PCLK）频率设置。PCLK = MCLK*M/((N+1)/8), R[0X341E]用于设置PLL工作与否 还有旁路有否。如果想要旁路掉PLL那么R[0X341E]【0】必须设置为1，如果有功耗要求，可以将R[0X341E]【1】设置为1来关闭PLL 。如果要打开PLL，那么以上两位必须设置为0.在默认情况下，都是关闭和旁路掉PLL的。
Any changes to PLL settings must be done with PLL bypassed (R0x341E[0]=1). （当需要修改PLL的参数时必须保持PLL在旁路状态）
PLL programming and power-up sequence is as follows:
1. Program PLL frequency settings, R0x341C (pll_m, pll_n) (master clock frequency is
equal to fVCO_pll/8). With default settings master clock frequency of 80 MHz is
obtained with fCLKIN=16MHz.
2. Power up PLL, R0x341E[1] = 0.
3. Wait for PLL settling time > 1ms.
4. Turn off PLL bypass, R0x341E[0] = 0.
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