PWM.rar_C8051F020DK_keil pwm

/************************************************************************************ * Copyright (c), 2006-2007, C8051F网络 * All rights reserved. * * Http: www.c8051f.com * Email: mite@vip.qq.com * * File name: SPIFLASH.c * Project : C8051F020DK * Processor: C8051F020 * Compiler : Keil C51 Compiler * * Description: 本文件是SPI接口FLASH硬件驱动程序文件;适用器件AT25F512、AT25F1024； * * author: glacier * QQ: 252858144 * date: 2009.04.02 * * Others: none; * * Function List: * 1. void SPIFlash_Init(void) * 2. bool SPIFlash_Erase(void) * 3. bool SPIFlash_EraseSector(unsigned char sector) * 4. bool SPIFlash_WriteByte(unsigned long addr, unsigned char val) * 5. bool SPIFlash_Write(unsigned long addr, unsigned char *p, unsigned int len) * 6. bool SPIFlash_ReadByte(unsigned long addr, unsigned char *val) * 7. bool SPIFlash_Read(unsigned long addr, unsigned char *p, unsigned int len) * 8. bool SPIFlash_ReadID(unsigned char *ManufacturerID, unsigned char *ProductID) * *************************************************************************************/ /************************************************************************************/ // 引用外部头文件 /************************************************************************************/ #include "..\config\c8051f020.h" #include "..\config\const.h" #include "..\driver\spi.h" #include "..\driver\SPIFlash.h" #include "..\driver\Delay.h" /************************************************************************************/ // 常量及全局变量定义 /************************************************************************************/ #define SPIFLASH_FREQ 2000000 // SCK freq (Hz) #define PAGE_SIZE 0x80 // 定义页大小 #define SECTOR_SIZE 0x8000 // 定义扇区大小 // SPI FLASH操作指令定义 #define CMD_WRSR 0x01 // Write Status Register Command #define CMD_WRITE 0x02 // Write Command #define CMD_READ 0x03 // Read Command #define CMD_WRDI 0x04 // Reset Write Enable Latch Command #define CMD_RDSR 0x05 // Read Status Register Command #define CMD_WREN 0x06 // Set Write Enable Latch Command #define CMD_RDID 0x15 // Read Manufacturer and Product ID #define CMD_SECTOR_ERASE 0x15 // Erase One Sector in Memory Array #define CMD_CHIP_ERASE 0x62 // Erase All Sectors in Memory Array /*************************************************************************************/ // // SPI接口FLASH(AT25F512、AT25F1024)硬件驱动程序函数定义 // /*************************************************************************************/ /*********************************************************************************** * Function: SPIFlash_CS; * * Description: SPI接口Flash芯片片选使能函数; * * Input: flag=true, 使能芯片操作; flag=false, 禁止芯片操作; * * Output: none; * * Return: none; * * Note: none; ************************************************************************************/ void SPIFlash_CS(bool flag) { if(flag) NSSMD0 = 0; else NSSMD0 = 1; } /*********************************************************************************** * Function: SPIFlash_WP; * * Description: SPI接口Flash芯片片选使能函数; * * Input: flag=true, 使能芯片操作; flag=false, 禁止芯片操作; * * Output: none; * * Return: none; * * Note: none; ************************************************************************************/ void SPIFlash_WP(bool flag) { SPIFlash_CS(true); // 使能芯片操作 if(flag) SPI_WriteData(CMD_WREN); // 写使能 else SPI_WriteData(CMD_WRDI); // 写禁止 SPIFlash_CS(false); // 禁止芯片操作 } /*********************************************************************************** * Function: SPIFlash_Busy; * * Description: 判断FLASH是否忙函数; * * Input: none; * * Output: none; * * Return: true,FLASH忙，不能进行操作; false,FLASH空闲，可以进行操作; * * Note: none; ************************************************************************************/ bool SPIFlash_Busy(void) { unsigned char val; SPIFlash_CS(true); // 使能芯片操作 SPI_WriteData(CMD_RDSR); // 写读状态命令 SPI_ReadData(&val); // 读数据命令 SPIFlash_CS(false); // 禁止芯片操作 if (val&0x01) return true; else return false; } /*********************************************************************************** * Function: SPIFlash_Init; * * Description: SPI接口Flash初始化函数; * * Input: none; * * Output: none; * * Return: none; * * Note: none; ************************************************************************************/ void SPIFlash_Init(void) { SPI_Init(SPIFLASH_FREQ); } /*********************************************************************************** * Function: SPIFlash_Erase; * * Description: Flash芯片擦除程序; * * Input: none; * * Output: none; * * Return: true,芯片擦除成功; false,芯片擦除失败; * * Note: none; ************************************************************************************/ bool SPIFlash_Erase(void) { SPIFlash_WP(true); SPIFlash_CS(true); // 使能芯片操作 SPI_WriteData(CMD_CHIP_ERASE); // 擦除芯片 SPIFlash_CS(false); // 禁止芯片操作 while(SPIFlash_Busy()); // 等待芯片不忙 return true; } /*********************************************************************************** * Function: SPIFlash_EraseSector; * * Description: Flash芯片扇区擦除程序, 每32KB为一个扇区; * * Input: 扇区索引号 * AT25F512,扇区索引号范围:0~1; * AT25F1024,扇区索引号范围:0~3; * * Output: none; * * Return: true,芯片扇区擦除成功; false,芯片扇区擦除失败; * * Note: none; ************************************************************************************/ bool SPIFlash_EraseSector(unsigned char sector) { unsigned long addr; unsigned char adr[3]; SPIFlash_WP(true); addr = (unsigned long)sector*SECTOR_SIZE; adr[2] = (addr>>16)&0xFF; adr[1] = (addr>>8)&0xFF; adr[0] = addr&0xFF; SPIFlash_CS(true); // 使能芯片操作 SPI_WriteData(CMD_SECTOR_ERASE); // 擦除扇区 SPI_WriteData(adr[2]); // 写地址 SPI_WriteData(adr[1]); // 写地址 SPI_WriteData(adr[0]); // 写地址 SPIFlash_CS(false); // 禁止芯片操作 while(SPIFlash_Busy()); // 等待芯片不忙 return true; } /*********************************************************************************** * Function: SPIFlash_WriteByte; * * Description: 向FLASH的某个地址写入字节数据; * * Input: addr,flash地址; val,写入的字节数据; * AT25F512, 地址范围: 0x000000~0x00ffff; * AT25F1024, 地址范围: 0x000000~0x01ffff; * * Output: none; * * Return: true,写入数据成功; false,写入数据失败; * * Note: 本函数不做地址范围范围检查,所以不要超过范围; ************************************************************************************/ bool SPIFlash_WriteByte(unsigned long addr, unsigned char val) { unsigned char adr[3]; adr[2] = (addr>>16)&0xFF; adr[1] = (addr>>8)&0xFF; adr[0] = addr&0xFF; SPIFlash_WP(true); SPIFlash_CS(true); // 使能芯片操作 SPI_WriteData(CMD_WRITE); // 写指令 SPI_WriteData(adr[2]); // 写地址 SPI_WriteData(adr[1]); // 写地址 SPI_WriteData(adr[0]); // 写地址 SPI_WriteData(val); // 写地址 SPIFlash_CS(false); // 禁止芯片操作 while(SPIFlash_Busy()); // 等待芯片不忙 return true; } /*********************************************************************************** * Function: SPIFlash_Write; * * Description: 写入FLASH一段数据; * * Input: addr,写入flash数据的起始地址; *p, 要写入数据的指针; len,要写入数据的长度; *