199 lines
8.6 KiB
C
199 lines
8.6 KiB
C
#include "sram.h"
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#include "usart.h"
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//////////////////////////////////////////////////////////////////////////////////
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//本程序只供学习使用，未经作者许可，不得用于其它任何用途
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//ALIENTEK STM32F407开发板
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//外部SRAM 驱动代码
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//正点原子@ALIENTEK
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//技术论坛:www.openedv.com
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//创建日期:2014/5/14
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//版本：V1.0
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//版权所有，盗版必究。
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//Copyright(C) 广州市星翼电子科技有限公司 2014-2024
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//All rights reserved
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//////////////////////////////////////////////////////////////////////////////////
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//使用NOR/SRAM的 Bank1.sector3,地址位HADDR[27,26]=10
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//对IS61LV25616/IS62WV25616,地址线范围为A0~A17
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//对IS61LV51216/IS62WV51216,地址线范围为A0~A18
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#define Bank1_SRAM3_ADDR ((u32)(0x68000000))
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//初始化外部SRAM
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void FSMC_SRAM_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
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FSMC_NORSRAMTimingInitTypeDef readWriteTiming;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOD|RCC_AHB1Periph_GPIOE|RCC_AHB1Periph_GPIOF|RCC_AHB1Periph_GPIOG, ENABLE);//使能PD,PE,PF,PG时钟
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RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC,ENABLE);//使能FSMC时钟
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;//PB15 推挽输出,控制背光
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//100MHz
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
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GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化 //PB15 推挽输出,控制背光
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GPIO_InitStructure.GPIO_Pin = (3<<0)|(3<<4)|(0XFF<<8);//PD0,1,4,5,8~15 AF OUT
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
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GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化
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GPIO_InitStructure.GPIO_Pin = (3<<0)|(0X1FF<<7);//PE0,1,7~15,AF OUT
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
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GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化
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GPIO_InitStructure.GPIO_Pin = (0X3F<<0)|(0XF<<12); //PF0~5,12~15
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
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GPIO_Init(GPIOF, &GPIO_InitStructure);//初始化
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GPIO_InitStructure.GPIO_Pin =(0X3F<<0)| GPIO_Pin_10;//PG0~5,10
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
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GPIO_Init(GPIOG, &GPIO_InitStructure);//初始化
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource0,GPIO_AF_FSMC);//PD0,AF12
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource1,GPIO_AF_FSMC);//PD1,AF12
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource4,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource5,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource8,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource9,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource10,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource11,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource12,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource13,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOD,GPIO_PinSource15,GPIO_AF_FSMC);//PD15,AF12
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource0,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource1,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource7,GPIO_AF_FSMC);//PE7,AF12
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource8,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource10,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource12,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOE,GPIO_PinSource15,GPIO_AF_FSMC);//PE15,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource0,GPIO_AF_FSMC);//PF0,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource1,GPIO_AF_FSMC);//PF1,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource2,GPIO_AF_FSMC);//PF2,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource3,GPIO_AF_FSMC);//PF3,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource4,GPIO_AF_FSMC);//PF4,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource5,GPIO_AF_FSMC);//PF5,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource12,GPIO_AF_FSMC);//PF12,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource13,GPIO_AF_FSMC);//PF13,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource14,GPIO_AF_FSMC);//PF14,AF12
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GPIO_PinAFConfig(GPIOF,GPIO_PinSource15,GPIO_AF_FSMC);//PF15,AF12
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource0,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource1,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource2,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource3,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource4,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource5,GPIO_AF_FSMC);
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GPIO_PinAFConfig(GPIOG,GPIO_PinSource10,GPIO_AF_FSMC);
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readWriteTiming.FSMC_AddressSetupTime = 0x00; //地址建立时间（ADDSET）为1个HCLK 1/36M=27ns
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readWriteTiming.FSMC_AddressHoldTime = 0x00; //地址保持时间（ADDHLD）模式A未用到
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readWriteTiming.FSMC_DataSetupTime = 0x08; ////数据保持时间（DATAST）为9个HCLK 6*9=54ns
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readWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
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readWriteTiming.FSMC_CLKDivision = 0x00;
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readWriteTiming.FSMC_DataLatency = 0x00;
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readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A; //模式A
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FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;// 这里我们使用NE3 ，也就对应BTCR[4],[5]。
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FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
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FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;// FSMC_MemoryType_SRAM; //SRAM
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FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//存储器数据宽度为16bit
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FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =FSMC_BurstAccessMode_Disable;// FSMC_BurstAccessMode_Disable;
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FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
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FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait=FSMC_AsynchronousWait_Disable;
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FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
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FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
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FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable; //存储器写使能
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FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
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FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable; // 读写使用相同的时序
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FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
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FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming;
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FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &readWriteTiming; //读写同样时序
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FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); //初始化FSMC配置
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FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE); // 使能BANK3
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}
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//在指定地址(WriteAddr+Bank1_SRAM3_ADDR)开始,连续写入n个字节.
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//pBuffer:字节指针
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//WriteAddr:要写入的地址
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//n:要写入的字节数
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void FSMC_SRAM_WriteBuffer(u8* pBuffer,u32 WriteAddr,u32 n)
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{
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for(;n!=0;n--)
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{
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*(vu8*)(Bank1_SRAM3_ADDR+WriteAddr)=*pBuffer;
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WriteAddr++;
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pBuffer++;
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}
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}
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//在指定地址((WriteAddr+Bank1_SRAM3_ADDR))开始,连续读出n个字节.
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//pBuffer:字节指针
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//ReadAddr:要读出的起始地址
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//n:要写入的字节数
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void FSMC_SRAM_ReadBuffer(u8* pBuffer,u32 ReadAddr,u32 n)
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{
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for(;n!=0;n--)
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{
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*pBuffer++=*(vu8*)(Bank1_SRAM3_ADDR+ReadAddr);
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ReadAddr++;
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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//测试函数
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//在指定地址写入1个字节
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//addr:地址
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//data:要写入的数据
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void fsmc_sram_test_write(u32 addr,u8 data)
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{
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FSMC_SRAM_WriteBuffer(&data,addr,1);//写入1个字节
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}
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//读取1个字节
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//addr:要读取的地址
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//返回值:读取到的数据
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u8 fsmc_sram_test_read(u32 addr)
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{
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u8 data;
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FSMC_SRAM_ReadBuffer(&data,addr,1);
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return data;
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}
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