LPC23XX开发讲解.ppt

LPC23XX开发讲解,朱明富,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,2,LPC23XX开发讲解,简介 Keil开发工具 程序模板 应用程序设计 接口程序设计 硬件设计,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,3,LPC23XX简介,ARM 7TDMI-S, 72MHz 512kB Flash, ISP, IAP 64kB RAM + 16kB Enet + 8kB USB + 2kB RTC USB, Ethernet, UART, CAN, I2C, I2S, SPI, SSP GPIO, 10 Bit AD/DA, PWM, 4 Timer, Watch DOG, RTC JTAG, PLL, On-Chip crystal oscillator,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,4,LPC23XX序列型号,LPC2361/62/64/65/66/67/68 LPC2377/78 (144Pin) LPC2387 LPC2388 (144Pin),2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,5,LPC23XX开发工具,Keil ARM ADS NXP ISP软件FlashMagic,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,6,LPC23XX开发板及应用板,开发板-展示功能 应用板-实际应用,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,7,LPC23XX应用,选型考虑 是否一定要选择OS uCosII,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,8,Keil安装,mdk305.exe rtlarm305.exe License Management,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,9,Keil 软件工程,新建Keil工程 从模板程序建立工程 修改LPCTest2.Uv2 修改LPCTest2.Opt,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,10,Keil 中源代码管理,选Project-Manage-Components, ,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,11,Keil 中所支持的设备管理,File-Device Database,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,12,Keil 中应用程序选项管理,点快捷按钮Options for Target,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,13,Keil中仿真器,Segger的RDI接口 ULink ULink实际上是并口(打印机口) ULink上用了一颗USB转并口的芯片 ULink只能设单个断点 ULink的驱动程序安装,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,14,Keil的调试,设置断点 单步运行 关闭WatchDog,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,15,LPC23XX程序模板,新建Keil工程 说明：startup.s是汇编程序，完成如下功能： 主晶振起振 PLL配置 中断向量设置 堆栈设置 跳转到C主程序,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,16,一个简单的程序,在前面创建的程序中没有C主程序 这个例子是一个模板 编程规则 把代码文件分类 把代码文件按通用性分目录存放,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,17,程序模板解析,Main.c 主程序 Startup.s 启动文件 Target.c 目标板初始化 Irq.c IRQ处理接口 Swi_handler.s 软件中断处理,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,18,startup.s,文件说明 宏定义 中断向量 复位中断处理 跳转到C主程序 加密处理 内存段分配,Mode_USR EQU 0x10 Mode_FIQ EQU 0x11 Mode_IRQ EQU 0x12 Mode_SVC EQU 0x13 Mode_ABT EQU 0x17 Mode_UND EQU 0x1B Mode_SYS EQU 0x1F I_Bit EQU 0x80 ; when I bit is set, IRQ is disabled F_Bit EQU 0x40 ; when F bit is set, FIQ is disabled ;/ Stack Configuration (Stack Sizes in Bytes) ;/ Undefined Mode ;/ Supervisor Mode ;/ Abort Mode ;/ Fast Interrupt Mode ;/ Interrupt Mode ;/ User/System Mode ;/ UND_Stack_Size EQU 0x00000000 SVC_Stack_Size EQU 0x00000100 ABT_Stack_Size EQU 0x00000080 FIQ_Stack_Size EQU 0x00000080 IRQ_Stack_Size EQU 0x00000600 USR_Stack_Size EQU 0x00000800 ;/ 说明: 当程序还有更多的RAM时, 可再增加用户Stack的大小 Stack_Size EQU (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + FIQ_Stack_Size + IRQ_Stack_Size + USR_Stack_Size) AREA STACK, NOINIT, READWRITE, ALIGN=3 Stack_Mem SPACE Stack_Size Stack_Top EQU Stack_Mem + Stack_Size,;/ Heap Configuration ;/ Heap Size (in Bytes) ;/ Heap_Size EQU 0x00000000 AREA HEAP, NOINIT, READWRITE, ALIGN=3 Heap_Mem SPACE Heap_Size ; Area Definition and Entry Point ; Startup Code must be linked first at Address at which it expects to run. AREA RESET, CODE, READONLY ARM ; Exception Vectors ; Mapped to Address 0. ; Absolute addressing mode must be used. ; Dummy Handlers are implemented as infinite loops which can be modified. Vectors LDR PC, Reset_Addr LDR PC, Undef_Addr LDR PC, SWI_Addr LDR PC, PAbt_Addr LDR PC, DAbt_Addr NOP ; Reserved Vector ; LDR PC, IRQ_Addr LDR PC, PC, #-0x0120 ; Vector from VicVectAddr LDR PC, FIQ_Addr,;/* ;* startup.s: startup file for NXP LPC230x Family Microprocessors ;* ;* Copyright(C) 2006, NXP Semiconductor ;* All rights reserved. ;* ;* History ;* 2006.09.01 ver 1.00 Prelimnary version, first Release ;* ;*/ PRESERVE8 ;/* ; * The STARTUP.S code is executed after CPU Reset. This file may be ; * translated with the following SET symbols. In uVision these SET ; * symbols are entered under Options - ASM - Define. ; * ; * REMAP: when set the startup code initializes the register MEMMAP ; * which overwrites the settings of the CPU configuration pins. The ; * startup and interrupt vectors are remapped from: ; * 0x00000000 default setting (not remapped) ; * 0x40000000 when RAM_MODE is used ; * ; * RAM_MODE: when set the device is configured for code execution ; * from on-chip RAM starting at address 0x40000000. ; */ ; Standard definitions of Mode bits and Interrupt (I & F) flags in PSRs,Reset_Addr DCD Reset_Handler Undef_Addr DCD Undef_Handler SWI_Addr DCD SWI_Handler PAbt_Addr DCD PAbt_Handler DAbt_Addr DCD DAbt_Handler DCD 0xB9206E28 ; Reserved Address IRQ_Addr DCD IRQ_Handler1 FIQ_Addr DCD FIQ_Handler Undef_Handler B Undef_Handler ;MOVS PC, R14 SWI_Handler B SWI_Handler PAbt_Handler B PAbt_Handler DAbt_Handler ;B DAbt_Handler SUBS PC, R14, #8 IRQ_Handler B IRQ_Handler FIQ_Handler B FIQ_Handler,; Reset Handler EXPORT Reset_Handler Reset_Handler ; Setup Stack for each mode LDR R0, =Stack_Top ; Enter Undefined Instruction Mode and set its Stack Pointer MSR CPSR_c, #Mode_UND:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #UND_Stack_Size ; Enter Abort Mode and set its Stack Pointer MSR CPSR_c, #Mode_ABT:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #ABT_Stack_Size ; Enter FIQ Mode and set its Stack Pointer MSR CPSR_c, #Mode_FIQ:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #FIQ_Stack_Size ; Enter IRQ Mode and set its Stack Pointer MSR CPSR_c, #Mode_IRQ:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #IRQ_Stack_Size ; Enter Supervisor Mode and set its Stack Pointer MSR CPSR_c, #Mode_SVC:OR:I_Bit:OR:F_Bit MOV SP, R0 SUB R0, R0, #SVC_Stack_Size ; Enter User Mode and set its Stack Pointer MSR CPSR_c, #Mode_USR MOV SP, R0 SUB SL, SP, #USR_Stack_Size,; Enter the C code IMPORT TargetResetInit BL TargetResetInit IMPORT _main LOADCMAINFUNCTION LDR R0, =_main BX R0 NOP SUB R0, R0, R0 BX R0 NOP ; LPC23xx非典FLASHROM的中断向量表架构 IMPORT VIC_Vect_Addr0 IRQ_Handler1 STMFD SP!, R11, R12, LR;真保护R11R12, 假保护LR(用于运算) ;/ LDR R12, VIC_Vect_Addr ;取VICVectAddr物理地址 ;/ LDR R12, R12 ;取出取VICVectAddr内实际向量中断号（非地址） LDR R12, PC , #-0x14c ;取出取VICVectAddr内实际向量中断号（非地址） AND R12, #0x1f ;防止32个中断序号越界， ;在此可再做序号越界处理（可省略） LDR R11, =VIC_Vect_Addr0 LDR R12, R11, R12, LSL #2;散转到用户真正的向量中断地址 STR R12, SP, #0x08 ;将中断向量地址R12写入事先保存的那个LR空间 LDMFD SP!, R11, R12, PC ;恢复R11R12,同时PC跳入中断向量地址执行,; Encryption FLASH IF :DEF:EN_CRP IF . = 0x1fc INFO 1,“nThe data at 0x000001fc this line.“ ENDIF CrpData WHILE . 0x1fc NOP WEND CrpData1 ; 如果要加密, 请使用此行, 注释下一行 ; DCD 0x87654321 DCD 0x00000000 ENDIF ; 说明: 这里保留至4kFlash边界, 以避免VIC中断代码处于前4k范围内 ; 从而使得某些时候不能正常运行 WHILE . 0x0ff8 NOP WEND ;- ; User Initial Stack & Heap AREA |.text|, CODE, READONLY IMPORT _use_two_region_memory EXPORT _user_initial_stackheap _user_initial_stackheap LDR R0, = Heap_Mem LDR R1, = (Stack_Mem + USR_Stack_Size) LDR R2, = (Heap_Mem + Heap_Size) LDR R3, = Stack_Mem BX LR END,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,19,target.c,文件说明 TargetInit函数 GPIOResetInit ConfigurePLL TargetResetInit,/* * target.c: Target C file for NXP LPC23xx/24xx Family Microprocessors * * Copyright(C) 2006, NXP Semiconductor * All rights reserved. * * History * 2006.07.13 ver 1.00 Prelimnary version, first Release * */ #include “LPC23xx.h“ #include “type.h“ #include “irq.h“ #include “target.h“,/* * Function name: TargetInit * * Descriptions: Initialize the target board; it is called in a necessary * place, change it as needed * * parameters: None * Returned value: None * */ void TargetInit(void) /* Add your codes here */ return; ,/* * Function name: GPIOResetInit * * Descriptions: Initialize the target board before running the main() * function; User may change it as needed, but may not * deleted it. * * parameters: None * Returned value: None * */ void GPIOResetInit( void ) /* Reset all GPIO pins to default: primary function */ PINSEL0 = 0x00000000; PINSEL1 = 0x00000000; PINSEL2 = 0x00000000; PINSEL3 = 0x00000000; PINSEL4 = 0x00000000; PINSEL5 = 0x00000000; PINSEL6 = 0x00000000; PINSEL7 = 0x00000000; PINSEL8 = 0x00000000; PINSEL9 = 0x00000000; PINSEL10 = 0x00000000;,IODIR0 = 0x00000000; IODIR1 = 0x00000000; IOSET0 = 0x00000000; IOSET1 = 0x00000000; FIO0DIR = 0x00000000; FIO1DIR = 0x00000000; FIO2DIR = 0x00000000; FIO3DIR = 0x00000000; FIO4DIR = 0x00000000; FIO0SET = 0x00000000; FIO1SET = 0x00000000; FIO2SET = 0x00000000; FIO3SET = 0x00000000; FIO4SET = 0x00000000; SCS |= 0x00000001; return; ,/* * Function name: ConfigurePLL * * Descriptions: Configure PLL switching to main OSC instead of IRC * at power up and wake up from power down. * This routine is used in TargetResetInit() and those * examples using power down and wake up such as * USB suspend to resume, ethernet WOL, and power management * example * parameters: None * Returned value:None * */ void ConfigurePLL ( void ) DWORD MValue, NValue; if ( PLLSTAT /* select main OSC, 12MHz, as the PLL clock source */,PLLCFG = PLL_MValue | (PLL_NValue 16; while (MValue != PLL_MValue) ,/* * Function name: TargetResetInit * * Descriptions: Initialize the target board before running the main() * function; User may change it as needed, but may not * deleted it. * * parameters: None * Returned value:None * */ void TargetResetInit(void) #ifdef _DEBUG_RAM MEMMAP = 0x2; /* remap to internal RAM */ #endif #ifdef _DEBUG_FLASH MEMMAP = 0x1; /* remap to internal flash */ #endif #if USE_USB PCONP |= 0x80000000; /* Turn On USB PCLK */ #endif /* Configure PLL, switch from IRC to Main OSC */ ConfigurePLL();,/* Set system timers for each component */ #if (Fpclk / (Fcclk / 4) = 1 PCLKSEL0 = 0x00000000; /* PCLK is 1/4 CCLK */ PCLKSEL1 = 0x00000000; #endif #if (Fpclk / (Fcclk / 4) = 2 PCLKSEL0 = 0xAAAAAAAA; /* PCLK is 1/2 CCLK */ PCLKSEL1 = 0xAAAAAAAA; #endif #if (Fpclk / (Fcclk / 4) = 4 PCLKSEL0 = 0x55555555; /* PCLK is the same as CCLK */ PCLKSEL1 = 0x55555555; #endif /* Set memory accelerater module*/ MAMCR = 0; #if Fcclk 20000000 MAMTIM = 1; #else #if Fcclk 40000000 MAMTIM = 2; #else MAMTIM = 3; #endif #endif MAMCR = 2; GPIOResetInit(); init_VIC(); return; ,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,20,irq.c,文件说明 spurious_handler init_VIC install_irq,/* * irq.c: Interrupt handler C file for NXP LPC230x Family Microprocessors * * Copyright(C) 2006, NXP Semiconductor * All rights reserved. * * History * 2006.07.13 ver 1.00 Prelimnary version, first Release * */ #include “LPC23xx.h“ /* LPC23XX Peripheral Registers */ #include “type.h“ #include “irq.h“,/* * Function name: spurious_handler * * Descriptions: spurious interrupt handler . * parameters: None * Returned value: None * */ DWORD VIC_Vect_Addr0; void spurious_handler() _irq ,/* Initialize the interrupt controller */ /* * Function name: init_VIC * * Descriptions: Initialize VIC interrupt controller. * parameters: None * Returned value: None * */ void init_VIC(void) DWORD i = 0; DWORD *vect_addr, *vect_cntl; /* initialize VIC*/ VICIntEnClr = 0xffffffff; VICVectAddr = 0; VICIntSelect = 0; VICDefVectAddr=(unsigned long)spurious_handler; /* set all the vector and vector control register to 0 */ for ( i = 0; i VIC_SIZE; i+ ) vect_addr = (DWORD *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + i*4); vect_cntl = (DWORD *)(VIC_BASE_ADDR + VECT_CNTL_INDEX + i*4); *vect_addr = (unsigned long)spurious_handler; /0x0; *vect_cntl = 0xF; return; ,/* * Function name: install_irq * * Descriptions: Install interrupt handler * parameters: Interrupt number, interrupt handler address, * interrupt priority * Returned value:true or false, return false if IntNum is out of range * */ DWORD install_irq( DWORD IntNumber, void *HandlerAddr, DWORD Priority ) DWORD *vect_addr; DWORD *vect_cntl; VICIntEnClr = 1 = VIC_SIZE ) return ( FALSE ); else /* find first un-assigned VIC address for the handler */ vect_addr = (DWORD *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + IntNumber*4); vect_cntl = (DWORD *)(VIC_BASE_ADDR + VECT_CNTL_INDEX + IntNumber*4); *vect_addr = (DWORD)HandlerAddr; /* set interrupt vector */ *vect_cntl = Priority; VICIntEnable = 1 IntNumber; /* Enable Interrupt */ return( TRUE ); /* * End Of File */,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,21,swi_handler.s,文件说明及宏定义 SoftwareInterrupt IntEnable IntDisable,;/* ;* swi_handler.s: SWI handler file for NXP LPC230x Family Microprocessors ;* ;* Copyright(C) 2006, NXP Semiconductor ;* All rights reserved. ;* ;* History ;* 2006.09.01 ver 1.00 Prelimnary version, first Release ;* ;*/ PRESERVE8 SWI_IRQ_DIS EQU 0 SWI_IRQ_EN EQU 1 SWI_FIQ_DIS EQU 2 SWI_FIQ_EN EQU 3 I_Bit EQU 0x80 F_Bit EQU 0x40 ;The exported labels and functions EXPORT SoftwareInterrupt EXPORT IntEnable EXPORT IntDisable CODE32 AREA SWI_HANDLER,CODE,READONLY ENTRY,;* ;* SWI interrupt handler ;* Function : SoftwareInterrupt(SWI_Number) ;* The SWI_Number is 0 through 3 ;* See below “SwiFunction“ table below ;* Parameters: None ;* input : SWI_Number ;* output : None ;* SoftwareInterrupt CMP R0, #4 LDRLO PC, PC, R0, LSL #2 MOVS PC, LR SwiFunction DCD IRQDisable ;0 DCD IRQEnable ;1 DCD FIQDisable ;2 DCD FIQEnable ;3 IRQDisable MRS R0, SPSR ORR R0, R0, #I_Bit MSR SPSR_c, R0 MOVS PC, LR IRQEnable MRS R0, SPSR BIC R0, R0, #I_Bit MSR SPSR_c, R0 MOVS PC, LR FIQDisable MRS R0, SPSR ORR R0, R0, #F_Bit MSR SPSR_c, R0 MOVS PC, LR FIQEnable MRS R0, SPSR BIC R0, R0, #F_Bit MSR SPSR_c, R0 MOVS PC, LR,;* ;* Call SWI to enable IRQ * ;* Function : void IntEnable(void) * ;* Parameters: None * ;* input : None * ;* output : None * ;* IntEnable SWI SWI_IRQ_EN BX lr ; end of IntEnable ;* ;* Call SWI to disable IRQ * ;* Function : void IntDisable(void) * ;* Parameters : None * ;* input : None * ;* output : None * ;* IntDisable SWI SWI_IRQ_DIS BX lr ; end of IntDisable END ;/* ;* End Of File ;*/,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,22,应用程序设计,基于硬件的程序设计准则 LPC23XX程序主要流程,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,23,基于硬件的程序设计准则,软件与硬件分离 功能独立 功能分层 分时处理与实时处理 充分利用C语言的宏定义,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,24,LPC23XX程序主要流程,对于通用I/O端口 使用PINSELx定义端口作为通用I/O功能, 每个引脚可能有4个功能, 因此需要用2位来确定其功能 设置SCS寄存器第0位为1, 使其作为快速I/O端口 使用PINMODEx定义端口的模式, 分为上拉, 下拉, 浮空, 因此需要用2位来确定其模式 使用FIOxDIR来确定端口方向 使用FIOxMASK与FIOxCLR, FIOxSET, FIOxPIN联合来设置端口的值,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,25,LPC23XX程序主要流程,使用通用I/O端口模拟数据总线 由于通用I/O一般情况下方向是确定的, 通常或者为输入,或者为输出, 要模拟数据总线, 必须在需要的时候, 随时改变端口的方向, 可使用FIOxDIR寄存器完成此项工作。 实例：LCD控制 外部中断 除EXTINT0-EXTINT3外，端口0和端口2均可以作为外部中断源，它们共用EXTINT3这个外部中断。,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,26,LPC23XX程序主要流程,上拉与下拉 根据实际情况合理选用。主要对上电时的初始值。上拉或下拉都是弱的，有时也用外部分电阻上/下拉。 对于输入，上拉表示通用端口所连接的外部信号不存在时, 端口值为1, 下拉为0。 对于输出，如果没有更改时，上拉输出为高(1), 下拉输出为低(0)。 FIOxPIN总是可以读出端口的状态。 FIOxPIN对非通用I/O端口也可读出其状态。,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,27,LPC23XX程序主要流程,对于内置(片上)外设, 如UART, CAN, SPI等: 使用PINSELx定义端口作为特定外设。 通常情况作为外设的引脚的方向是确定的，如果可能，还会自动改变方向。 大多情况下，无须设置上拉或下拉模。 设置外设的参数 如果需要的话，安装中断服务程序 外设上电(有些外设默认是上电的，有些不是) 启动外设,2019/6/30,LPC23XX开发讲解 华中科技大学控制科技与工程系 朱明富,28,LPC23XX程序主要流程,对于内置(