/*
?*?串口字符串
?*?說明:只處理一位整數帶括號加減乘除，不檢測表達式正誤
?*?????例如:輸入（5+3）*（3*2+9）?=
?*?????????輸出120
?*?運行環境：msp430f6638
?*?編譯環境：CCS?7.1.1?（新版本報錯則新建工程復制代碼）
?*?日期：2020.1.13
?*?作者：于子豪
?*/
#include?

typedef?unsigned?char?u8;
typedef???signed?int?u16;
typedef?unsigned?int?SP6;
typedef?unsigned?long?u32;

void?init_uart_115200（void）;
void?set_SMCLK_4MHz（void）;
int?analysis_char（u8?oneChar）;
void?sendResult（int?num）;
void?oneCharProcess（u8?oneChar）;
u8?getPriority（u8?oneChar）;
int?calculate（char?char0?int?a?int?b）;
void?num_push（int?num）;
int?num_pop（void）;
void?sp_push（u8?sp）;
u8?sp_pop（void）;

u8?revChar_temp?=?0;
char?*?sendstr;
int?str_index?=?0;

int?num[20]?=?{0};//運算數棧
int?num_index?=?-1;//運算數棧棧頂指針
u8?sp[20]?=?{0};//運算符棧
int?sp_index?=?-1;//運算符棧棧頂指針

int?main（void）?{

????WDTCTL?=?WDTPW?|?WDTHOLD;???//?Stop?watchdog?timer

????set_SMCLK_4MHz（）;

????init_uart_115200（）;

????__enable_interrupt（）;

????sendstr?=?“start\n“;
????UCA1IFG?|=?UCTXIFG;?????????????//強制進入中斷

????while（1）{

????}

}

/*?========?USCI?A0/B0?TX?Interrupt?Handler?Generation?========?*/
#pragma?vector?=?USCI_A1_VECTOR
__interrupt?void?USCI_A1_ISR（void）{
????switch（__even_in_range（UCA1IV4））{//user?guide：36.4.14?UCAxIV?Register
????????case?0:break;
????????case?2://接受數據
????????????revChar_temp?=?UCA1RXBUF;
????????????oneCharProcess（revChar_temp）;
????????????break;???????????????????//vector?2?:?RXIFG
????????case?4://發送數據
????????????if（sendstr[str_index]?!=?‘\0‘）{
????????????????UCA1TXBUF?=?sendstr[str_index++];
????????????}else{
????????????????str_index?=?0;
????????????}
????????????break;????????????????????//vector?4?:?TXIFG
????????default:?break;
????}
}

//運算符優先級：數值越小優先級越高
u8?getPriority（u8?oneChar）{
????switch（oneChar）{
????case?‘（‘:return?0;
????case?‘*‘:return?1;
????case?‘/‘:return?1;
????case?‘-‘:return?2;
????case?‘+‘:return?2;
????case?‘）‘:return?3;
????case?‘=‘:return?4;
????default?:?break;
????}
????return?255;
}

//中斷處理函數，一次處理一個字符
void?oneCharProcess（u8?oneChar）{
????int?analysisChar?=?analysis_char（oneChar）;//遇到操作數時，將其壓入num
????if（analysisChar?!=?-1?&&?analysisChar?!=?-2）{
????????num_push（analysisChar）;
????}else?if（analysisChar?==?-1）{
????????if（oneChar==‘=‘）{//所有SP出棧，最后的計算結果在num棧中
????????????char?temp1?=?sp_pop（）;
????????????while（temp1?!=?0）{
????????????????num_push（calculate（temp1?num_pop（）?num_pop（）））;
????????????????temp1?=?sp_pop（）;
????????????}
????????????sendResult（num_pop（））;
????????}else?if（（sp_index==-1）?&&?（num_index==-1）?&&?（oneChar?==?‘-‘））{//第一個運算數是負數情況
????????????sp_push（oneChar）;
????????????num_push（0）;
????????}else?if（（sp_index==-1）?||?（oneChar==‘（‘）?||?（getPriority（oneChar）????????????sp_push（oneChar）;
????????}else?if（oneChar==‘）‘）{//如果右括號“）”，則依次彈出SP棧頂的運算符，并壓入num，直到遇到左括號為止，此時將這一對括號丟棄；
????????????char?temp1?=?sp_pop（）;
????????????while（temp1!=‘（‘）{
????????????????num_push（calculate（temp1?num_pop（）?num_pop（）））;
????????????????temp1?=?s

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-01-13?11:26??UARTcalculate\
?????文件?????????647??2020-01-13?12:44??UARTcalculate\.ccsproject
?????文件???????30162??2020-01-13?12:45??UARTcalculate\.cproject
?????目錄???????????0??2020-01-13?11:26??UARTcalculate\.launches\
?????文件????????4939??2020-01-13?14:25??UARTcalculate\.launches\UARTcalculate.launch
?????文件?????????843??2020-01-13?11:19??UARTcalculate\.project
?????目錄???????????0??2020-01-13?11:20??UARTcalculate\.settings\
?????文件??????????62??2020-01-13?11:19??UARTcalculate\.settings\org.eclipse.cdt.codan.core.prefs
?????文件?????????123??2020-01-13?11:19??UARTcalculate\.settings\org.eclipse.cdt.debug.core.prefs
?????文件?????????208??2020-01-13?11:20??UARTcalculate\.settings\org.eclipse.core.resources.prefs
?????目錄???????????0??2020-01-13?17:43??UARTcalculate\Debug\
?????文件???????89469??2020-01-13?17:43??UARTcalculate\Debug\UARTcalculate.map
?????文件???????75280??2020-01-13?17:43??UARTcalculate\Debug\UARTcalculate.out
?????文件??????288079??2020-01-13?17:43??UARTcalculate\Debug\UARTcalculate_linkInfo.xml
?????文件??????????59??2020-01-13?17:43??UARTcalculate\Debug\ccsObjs.opt
?????文件?????????707??2020-01-13?17:43??UARTcalculate\Debug\main.d
?????文件???????32440??2020-01-13?17:43??UARTcalculate\Debug\main.obj
?????文件????????4417??2020-01-13?17:43??UARTcalculate\Debug\makefile
?????文件?????????260??2020-01-13?12:45??UARTcalculate\Debug\objects.mk
?????文件????????2073??2020-01-13?17:43??UARTcalculate\Debug\sources.mk
?????文件????????1064??2020-01-13?17:43??UARTcalculate\Debug\subdir_rules.mk
?????文件?????????530??2020-01-13?17:43??UARTcalculate\Debug\subdir_vars.mk
?????文件???????14641??2020-01-13?11:19??UARTcalculate\lnk_msp430f6638.cmd
?????文件????????8358??2020-01-13?17:32??UARTcalculate\main.c
?????目錄???????????0??2020-01-13?11:19??UARTcalculate\targetConfigs\
?????文件?????????822??2020-01-13?12:44??UARTcalculate\targetConfigs\MSP430F6638.ccxml
?????文件?????????806??2020-01-13?11:19??UARTcalculate\targetConfigs\readme.txt