tica, SimSun, sans-serif">接口连接:#CS-------FSMC_NE1
#INT-------FSMC_NWAIT
A0--------FSMC_A15
#RD--------FSMC_NOE
#WR-------FSMC_NWE
接口配置:GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);
/* ʹÄÜ FSMC, GPIOD, GPIOE, GPIOF, GPIOG ºÍ AFIO ʱÖÓ */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE |
RCC_APB2Periph_GPIOF | RCC_APB2Periph_GPIOG |
RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMCÊý¾ÝÏßFSMC_D[0:7]³õʼ»¯£¬ÍÆÍ츴ÓÃÊä³ö*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_14 |GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 |GPIO_Pin_10;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/*FSMCµØÖ·ÏßFSMC_A15³õʼ»¯£¬ÍÆÍ츴ÓÃÊä³ö*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_Init(GPIOG, &GPIO_InitStructure);
/*FSMC NOEºÍNWE³õÊÔ»¯£¬ÍÆÍ츴ÓÃÊä³ö*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 |GPIO_Pin_5;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMC NE1³õÊÔ»¯£¬ÍÆÍ츴ÓÃÊä³ö*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/*FSMC_NWAIT³õÊÔ»¯£¬ÊäÈë*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOD, &GPIO_InitStructure);
FSMC配置:
FSMC_NORSRAMInitTypeDef init;
FSMC_NORSRAMTimingInitTypeDef timing;
/*-- FSMC Configuration ------------------------------------------------------*/
/*----------------------- SRAM Bank 1 ----------------------------------------*/
/* FSMC_Bank1_NORSRAM1 configuration */
timing.FSMC_AddressSetupTime = 0;
timing.FSMC_AddressHoldTime = 0;
timing.FSMC_DataSetupTime = 2;
timing.FSMC_BusTurnAroundDuration = 0;
timing.FSMC_CLKDivision = 0;
timing.FSMC_DataLatency = 0;
timing.FSMC_AccessMode = FSMC_AccessMode_A;
init.FSMC_Bank = FSMC_Bank1_NORSRAM1;
init.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
init.FSMC_MemoryType = FSMC_MemoryType_SRAM;
init.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b;
init.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
init.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable; /* ×¢Òâ¾É¿âÎÞÕâ¸ö³ÉÔ± */
init.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
init.FSMC_WrapMode = FSMC_WrapMode_Disable;
init.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
init.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
init.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
init.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
init.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
init.FSMC_ReadWriteTimingStruct = &timing;
init.FSMC_WriteTimingStruct = &timing;
FSMC_NORSRAMInit(&init);
/* - BANK 1 (of NOR/SRAM Bank 1~4) is enabled */
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);
地址配置:#define CH376_DAT_PORT (*( vu32 *)0x60000000) // A15 = 0, CS = 0
#define CH376_CMD_PORT (*( vu32 *)0x60008000) // A15 = 1, CS = 0
配置完后测试通信
/* 测试单片机与CH376之间的通讯接口 */
// 发送测试命令
xWriteCH376Cmd(CMD11_CHECK_EXIST);
// 发送测试数据
xWriteCH376Data(0x65);
// 读数据
u8Result = xReadCH376Data();
u8Result 始终返回0x5f 求教有没有人遇到同样问题,怎么解决的啊
从上往下1:WR
2:RD
3:A0
4:NE1
5:D1(其中一位数据)
写一个数据时,写信号产生了几个周期 ,不正常。。。。。。这是怎么回事?
CH376并口时序参数:
用FSMC时,要计算好时间,详细看看CH376的时序要求,
程序上FSMC配置部分需要修改一下
timing.FSMC_DataSetupTime = 2;
我知道要调节这两个参数我计算出timing.FSMC_AddressSetupTime = 0;
timing.FSMC_DataSetupTime = 4;是可以的问题是这样配置后还是会在第一个写使能之后,后面又跟上3个写使能
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