基于ov529串口摄像头代码

#include "config.h" #include "sst25vfxx.h" /* ========================================================================= */ /* Project Name : SPI读写SST25VF040 flash */ /* File Name : SST25VF040.c */ /* Description : SST25VF040操作函数 */ /* Processor : STC12LE5A16S2 */ /* Tools : KEIL C51 */ /* ========================================================================= */ //============================================================================= // ----Function: void SST25VFxx_SPIinit(void); // -Description: Initialization SPMC75F2413A SPI. // --Parameters: none. // -----Returns: none. // -------Notes: Bit11:SCK, Bit12:SDI, Bit13:SDO, Bit14:CS. //============================================================================= sbit SPI_CLK = P1^7; sbit SPI_MOSI = P1^5; sbit SPI_MISO = P1^6; sbit SPI_SS = P1^4; //sbit SPI_WP = P3^4; #define SPIF 6 //注意该处值 #define PIC_FDT_FILESTARTADDR 0X000000 //图像文件名称属性起始地址 #define PIC_DATA_FILESTARTADDR 0X001000 //图像文件数据的起始地址 //#define WCOL 6 void SST25VFxx_SPIinit(void) { //P1M1 |= 0x0; //P1M0 |= 1; SPI_CLK = 0; SPI_MOSI = 1; SPI_MISO = 1; SPI_SS = 1; //SPI_WP = 1; //SPCTL = 0xd3; // 注意在这里CPHA不能为1，只能为0;SSIG只能为1，不能为0 //SPSTAT = 0xc0; //============================================================================= // SPCTL寄存器 // |-------|-------|--------|--------|---------|---------|---------|--------| // | bit7 | bit6 | bit5 | bit4 | bit3 | bit2 | bit1 | bit0 | // | SSIG | SPEN | DORD | MSTR | CPOL | CPHA | SPR1 | SPR0 | // |-------|-------|--------|--------|---------|---------|---------|--------| /* 1 1 0 1 0 0 1 1 SPIG:使能SPI中断 SPEN：使能SPI.SPE置位将使能SPI，进行任何SPI操作之前必须置位SPE. DORD:置位时，数据的LSB首先发送；否则数据的MSB首先发送 MSTR:主从选择。置位选择主机模式，否则选择从机模式。 CPOL：时钟极限。置位表示空闲时SCK为高电平；否则空闲时SCK为低电平 CPHA:时钟相位。CPHA决定数据是在SCK的起始沿采样还是在SCK的结束沿采样； 置位时表示在结束沿采样，否则在起始沿采样 SPR1,0:确定主机的SCK速率。采样列表如下： SPI2X SPR1 SPR0 SCK频率 0 0 0 Fosc/4 0 0 1 Fosc/16 0 1 0 Fosc/64 0 1 1 Fosc/128 1 0 0 Fosc/2 1 0 1 Fosc/8 1 1 0 Fosc/32 1 1 1 Fosc/64 SPI2X:为时钟倍速设置。置位后SCK频率将调高一倍 //============================================================================= // SPSTAT寄存器设置 // |-------|-------|--------|--------|---------|---------|---------|--------| // | bit7 | bit6 | bit5 | bit4 | bit3 | bit2 | bit1 | bit0 | // | SPIF | WCOL | -- | -- | -- | -- | -- | SPI2X | // |-------|-------|--------|--------|---------|---------|---------|--------| SPIF:SPI中断标志 SPI2X:倍速。若为主机频率可达到CPU的一半；但是若为从机，最高只能保证Fosc/4 */ } //============================================================================= // ----Function: uint16 SST25VFxx_RDID(void); // -Description: Read Manufacturer and Product ID // --Parameters: none // -----Returns: Manufacturer and Product ID // -------Notes: Return value for example // |---------------+---------------| // | High Byte | Low Byte | // +---------------+---------------+ // | Manufacturer | Product ID | // |---------------+---------------| // High Byte: Manufacturer // 1FH = ATMEL ..... // Low Byte: Product ID // 65H = 25F512 // 60H = 25F1024 // 63H = 25F2048 // 64H = 25F4096 ..... //============================================================================= /* unsigned int SST25VFxx_RDID(void) //Read Manufacturer and Product ID { TYPEWORDDEF HIREBUFFER; unsigned char buffer[4]; unsigned char i; SPI_SS = 0; //CS为低，有效 buffer[0] = RDID1; buffer[1] = 0x00; //高地址 buffer[2] = 0x00; //中间八位地址 buffer[3] = 0x00; //低地址 for(i=0;i<4;i++) { //SPDAT = buffer[i]; //SPI发送RDID指令和地址 //while(!(SPSTAT & (3<<SPIF))); //等待SPI发送数据完成 //SPSTAT = 0xC0; SendData(buffer[i]); } // SPDAT = 0; //写任何数据，主机产生时钟接收数据 // while(!(SPSTAT & (3<<SPIF))); //等待SPI数据接收完成 // SPSTAT = 0xc0; //清除标志 // HIREBUFFER.B._byte1 = SPDAT; //读取SST25VFxx送回的厂商信息数据BF HIREBUFFER.B._byte1 = GetData(); // SPDAT = 0; //写任何数据，主机产生时钟接收数据 // while(!(SPSTAT & (3<<SPIF))); //等待SPI数据接收完成 // SPSTAT = 0xc0; //清除标志 // HIREBUFFER.B._byte0 = SPDAT; //读取SST25VFxx送回的芯片ID数据41 HIREBUFFER.B._byte0 = GetData(); SPI_SS = 1; //CS为高 return(HIREBUFFER.W); //返回厂商和ID数据 }*/ //============================================================================= // ----Function: uint16 SST25VFxx_RDSR(void); // -Description: Read status register // --Parameters: none // -----Returns: SST25VFxx status // -------Notes: Return value format // |------+------+------+------+------+------+------+------| // | Bit7 | Bit6 | Bit5 | Bit4 | Bit3 | Bit2 | Bit1 | Bit0 | // +------+------+------+------+------+------+------+------+ // | WPEN | ** | ** | ** | BP1 | BP0 | WEN | /RDY | // |------+------+------+------+------+------+------+------| // Bit0=0 :Indicates the device is Ready. // Bit0=1 :Indicates the write cycle is in progress. // // Bit1=0 :Indicates the device is not WRITE ENABLED. // Bit1=1 :Indicates the device is WRITE ENABLED. // // Bit2 and Bit3 : Please see SST25VFxx Data Sheet Table. // // Bit7 : Please see SST25VFxx Data Sheet Table. ..... //============================================================================= unsigned char SST25VFxx_RDSR(void) //Read status register { unsigned char status = 0; SPI_SS = 0;