51学习（1）：vscode+platformIO 开发环境搭建
前言
目前单片机开发大都使用Keil。但是Keil的编辑器很落后，和VScode比差远了。
今天用vscode+platformIO插件搭建单片机开发环境。
环境
- 单片机：普中-STC89C516RD+
正文
一，安装vscode 和 platform
- 点击链接下载安装vscode: vscode官方下载地址
- vscode 搜索安装 PlatformIO IDE
安装时间较长
二，platform 使用
可以设置板子型号stc89c52。
板子的型号并不重要，因为型号决定板子支持的下载方式，支持的库。
重要的是板子的头文件，这个可以自己根据文档进行编写，也可以从Keil里面复制。
# 该路径下有 platform 提供的 STC89系列的头文件可以参考使用 .platformio\platforms\intel_mcs51\examples\stc-header # SDCC默认include路径下的头文件也可参考 c:/Users/fbh/.platformio/packages/toolchain-sdcc/include/**
可以自定义板子型号（可以参考官方文档：教程和示例 — PlatformIO 最新文档）。
我们使用STC-ISP下载程序。
项目编译
点击vscode右下角的对勾即可编译，得到的hex文件在下面的路径下。
${项目路径}\.pio\build\stc89c52rc
使用STC-ISP下载即可。
三，解决vscode 头文件搜索问题
vscode会根据配置文件去搜索头文件。
这个配置文件是platform自动生成的，会自动更新。所以不能直接在修改，要在platform.ini文件中修改。
build_flags = -I${path}
缺点是只能添加工程目录下的相对路径。
sdcc目录下的头文件可以直接包含，编译不会报错。但vscode语法提示会由于找不到include路径跑错。
比较好的一个解决方法是将必要的头文件放到工程目录下的include目录下。
比较重要的两个头文件 (内容见最后附件)
- compile.h ：支持SFR SBIT等操作符
- STC89XX.h : 单片机寄存器相关定义
四，和Keil的对比
缺点：
- 不方便在线调试
优点： - vscode IDE 使用舒服
- 可以利用现成的库，写代码更加方便
- 更加了解底层的编译环境
- 开源免费不用担心查水表
五，附件
- compile.h
/*-------------------------------------------------------------------------
compiler.h
Copyright (C) 2006, Maarten Brock, [email protected]
Portions of this file are Copyright 2014 Silicon Laboratories, Inc.
http://developer.silabs.com/legal/version/v11/Silicon_Labs_Software_License_Agreement.txt
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library; see the file COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
As a special exception, if you link this library with other files,
some of which are compiled with SDCC, to produce an executable,
this library does not by itself cause the resulting executable to
be covered by the GNU General Public License. This exception does
not however invalidate any other reasons why the executable file
might be covered by the GNU General Public License.
-------------------------------------------------------------------------*/
/*
* Header file to overcome 8051 compiler differences for specifying
* special function registers. The following compilers are supported:
* SDCC, Keil, Raisonance, IAR, Hi-Tech, Tasking, Crossware, Wickenhaeuser.
* Unfortunately not for use with Dunfield. The compilers are identified by
* their unique predefined macros. See also:
* http://predef.sourceforge.net/precomp.html
*
* SBIT and SFR define special bit and special function registers at the given
* address. SFR16 and SFR32 define sfr combinations at adjacent addresses in
* little-endian format. SFR16E and SFR32E define sfr combinations without
* prerequisite byte order or adjacency. None of these multi-byte sfr
* combinations will guarantee the order in which they are accessed when read
* or written.
* SFR16X and SFR32X for 16 bit and 32 bit xdata registers are not defined
* to avoid portability issues because of compiler endianness.
* SFR16LEX is provided for 16 bit little endian xdata registers. It is usable
* on little endian compilers only; on big endian compilers, these registers
* will not be defined.
* This file is to be included in every microcontroller specific header file.
* Example:
*
* // my_mcu.h: sfr definitions for my mcu
* #include
*
* SBIT (P0_1, 0x80, 1); // Port 0 pin 1
*
* SFR (P0, 0x80); // Port 0
*
* SFRX (CPUCS, 0xE600); // Cypress FX2 Control and Status register in xdata memory at 0xE600
*
* SFR16 (TMR2, 0xCC); // Timer 2, lsb at 0xCC, msb at 0xCD
*
* SFR16E(TMR0, 0x8C8A); // Timer 0, lsb at 0x8A, msb at 0x8C
*
* SFR32 (MAC0ACC, 0x93); // SiLabs C8051F120 32 bits MAC0 Accumulator, lsb at 0x93, msb at 0x96
*
* SFR32E(SUMR, 0xE5E4E3E2); // TI MSC1210 SUMR 32 bits Summation register, lsb at 0xE2, msb at 0xE5
*
*/
#ifndef COMPILER_H
#define COMPILER_H
/** SDCC - Small Device C Compiler
* http://sdcc.sf.net
*/
typedef enum {true=1,false=0}bool;
#if defined (SDCC) || defined (__SDCC)
# define SBIT(name, addr, bit) __sbit __at(addr+bit) name
# define SFR(name, addr) __sfr __at(addr) name
# define SFRX(name, addr) __xdata volatile unsigned char __at(addr) name
# define SFR16(name, addr) __sfr16 __at(((addr+1U)<<8) | addr) name
# define SFR16E(name, fulladdr) __sfr16 __at(fulladdr) name
# define SFR16LEX(name, addr) __xdata volatile unsigned short __at(addr) name
# define SFR32(name, addr) __sfr32 __at(((addr+3UL)<<24) | ((addr+2UL)<<16) | ((addr+1UL)<<8) | addr) name
# define SFR32E(name, fulladdr) __sfr32 __at(fulladdr) name
# define INTERRUPT(name, vector) void name (void) __interrupt (vector)
# define INTERRUPT_USING(name, vector, regnum) void name (void) __interrupt (vector) __using (regnum)
// NOP () macro support
#define NOP() __asm NOP __endasm
/** Keil C51
* http://www.keil.com
*/
#elif defined __CX51__
# define SBIT(name, addr, bit) sbit name = addr^bit
# define SFR(name, addr) sfr name = addr
# define SFRX(name, addr) volatile unsigned char xdata name _at_ addr
# define SFR16(name, addr) sfr16 name = addr
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) /* not supported */
# define SFR32E(name, fulladdr) /* not supported */
# define INTERRUPT(name, vector) void name (void) interrupt vector
# define INTERRUPT_USING(name, vector, regnum) void name (void) interrupt vector using regnum
// NOP () macro support
extern void _nop_ (void);
#define NOP() _nop_()
/** Raisonance
* http://www.raisonance.com
*/
#elif defined __RC51__
# define SBIT(name, addr, bit) at (addr+bit) sbit name
# define SFR(name, addr) sfr at addr name
# define SFRX(name, addr) xdata at addr volatile unsigned char name
# define SFR16(name, addr) sfr16 at addr name
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) /* not supported */
# define SFR32E(name, fulladdr) /* not supported */
# define INTERRUPT(name, vector) void name (void) interrupt vector
# define INTERRUPT_USING(name, vector, regnum) void name (void) interrupt vector using regnum
// NOP () macro support -- NOP is opcode 0x00
#define NOP() asm { 0x00 }
/** IAR 8051
* http://www.iar.com
*/
#elif defined __ICC8051__
# define SBIT(name, addr, bit) __bit __no_init volatile bool name @ (addr+bit)
# define SFR(name, addr) __sfr __no_init volatile unsigned char name @ addr
# define SFRX(name, addr) __xdata __no_init volatile unsigned char name @ addr
# define SFR16(name, addr) __sfr __no_init volatile unsigned int name @ addr
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) __sfr __no_init volatile unsigned long name @ addr
# define SFR32E(name, fulladdr) /* not supported */
# define _PPTOSTR_(x) #x
# define _PPARAM_(address) _PPTOSTR_(vector=address * 8 + 3)
# define _PPARAM2_(regbank) _PPTOSTR_(register_bank=regbank)
# define INTERRUPT(name, vector) _Pragma(_PPARAM_(vector)) __interrupt void name(void)
# define INTERRUPT_USING(name, vector, regnum) _Pragma(_PPARAM2_(regnum)) _Pragma(_PPARAM_(vector)) __interrupt void name(void)
extern __intrinsic void __no_operation (void);
#define NOP() __no_operation()
/** Tasking / Altium
* http://www.altium.com/tasking
*/
#elif defined _CC51
# define SBIT(name, addr, bit) _sfrbit name _at(addr+bit)
# define SFR(name, addr) _sfrbyte name _at(addr)
# define SFRX(name, addr) _xdat volatile unsigned char name _at(addr)
#if _CC51 > 71
# define SFR16(name, addr) _sfrword _little name _at(addr)
#else
# define SFR16(name, addr) /* not supported */
#endif
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) /* not supported */
# define SFR32E(name, fulladdr) /* not supported */
# define INTERRUPT(name, vector) _interrupt (vector) void name (void)
# define INTERRUPT_USING(name, vector, regnum) _interrupt (vector) _using(regnum) void name (void)
// NOP () macro support
extern void _nop (void);
#define NOP() _nop()
/** Hi-Tech 8051
* http://www.htsoft.com
*/
#elif defined HI_TECH_C
# define SBIT(name, addr, bit) volatile bit name @ (addr+bit)
# define SFR(name, addr) volatile unsigned char name @ addr
# define SFRX(name, addr) volatile far unsigned char name @ addr
# define SFR16(name, addr) /* not supported */
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) /* not supported */
# define SFR32E(name, fulladdr) /* not supported */
# define INTERRUPT(name, vector) void name (void) interrupt vector
# define INTERRUPT_PROTO(name, vector)
// NOP () macro support
#define NOP() asm(" nop ")
/** Crossware
* http://www.crossware.com
*/
#elif defined _XC51_VER
# define SBIT(name, addr, bit) _sfrbit name = (addr+bit)
# define SFR(name, addr) _sfr name = addr
# define SFRX(name, addr) volatile unsigned char _xdata name _at addr
# define SFR16(name, addr) _sfrword name = addr
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) /* not supported */
# define SFR32E(name, fulladdr) /* not supported */
/** Wickenhaeuser
* http://www.wickenhaeuser.de
*/
#elif defined __UC__
# define SBIT(name, addr, bit) unsigned char bit name @ (addr+bit)
# define SFR(name, addr) near unsigned char name @ addr
# define SFRX(name, addr) xdata volatile unsigned char name @ addr
# define SFR16(name, addr) /* not supported */
# define SFR16E(name, fulladdr) /* not supported */
# define SFR16LEX(name, addr) /* not supported */
# define SFR32(name, fulladdr) /* not supported */
# define SFR32E(name, fulladdr) /* not supported */
/** default
* unrecognized compiler
*/
#else
# warning unrecognized compiler
# define SBIT(name, addr, bit) volatile bool name
# define SFR(name, addr) volatile unsigned char name
# define SFRX(name, addr) volatile unsigned char name
# define SFR16(name, addr) volatile unsigned short name
# define SFR16E(name, fulladdr) volatile unsigned short name
# define SFR16LEX(name, addr) volatile unsigned short name
# define SFR32(name, fulladdr) volatile unsigned long name
# define SFR32E(name, fulladdr) volatile unsigned long name
#endif
#endif //COMPILER_H
- STC89XX头文件
#ifndef STC89xx_H
#define STC89xx_H
#include