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pulipakaa24
2026-06-12 02:55:04 -07:00
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RTOS_Labs_common/Interpreter.c Normal file
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// *************Interpreter.c**************
// Students implement this as part of EE445M Lab 1,2,3,4,5,6
// high level OS user interface
// Solution to labs 1,2,3,4,5,6
// Runs on MSPM0
// Jonathan W. Valvano 12/29/2025, valvano@mail.utexas.edu
#include <stdint.h>
#include <string.h>
#include "../RTOS_Labs_common/OS.h"
#include "../RTOS_Labs_common/ST7735_SDC.h"
#include "../inc/ADC.h"
#include "../RTOS_Labs_common/RTOS_UART.h"
#include "../RTOS_Labs_common/LPF.h"
#include "../RTOS_Labs_common/eDisk.h"
#include "../RTOS_Labs_common/eFile.h"
#include "../RTOS_Labs_common/heap.h"
#include "../RTOS_Labs_common/Interpreter.h"
void Lab4(void); // Lab 4 performance data
void DFT(void); // Discrete Fourier Transform
void Robot(void); // Robot thread
extern Sema4_t LCDFree;
unsigned int currentDirectory = 0;
#define MAX_CMD_LEN 16
// readLine reads a line from UART into buf (up to maxLen-1 chars + null terminator)
// Echoes printable characters, handles backspace, terminates on carriage return
static void readLine(char *buf, int maxLen){
int pos = 0;
while(1){
char c = UART_InChar();
if(c == '\r') break;
if(c == '\b' || c == 127){ // backspace or DEL
if(pos > 0){
pos--;
buf[pos] = 0;
UART_OutString("\b \b");
}
}else if(c >= ' ' && c <= '~'){ // printable ASCII only
if(pos < maxLen - 1){
buf[pos] = c;
pos++;
UART_OutChar(c);
}
}
}
buf[pos] = 0;
UART_OutString("\n");
}
// findArg returns pointer to first character after the first space in line,
// or 0 if no space found. Null-terminates the command portion.
static char* findArg(char *line){
for(int i = 0; line[i]; i++){
if(line[i] == ' '){
line[i] = 0;
return &line[i+1];
}
}
return 0;
}
// displayHelp prints all commands to the serial console
// Input: None
// Output: None
static void displayHelp(void){
UART_OutString("Basic RTOS interpreter commands:\n\n"
"format Formats the SDC (will lose EVERYTHING)\n\n"
"cd [directory ID] selects working directory, options are 0 or 1\n\n"
"ls prints name and contents of working directory\n\n"
"show [filename] prints contents of file in working directory\n\n"
"delete [filename] deletes the file named\n\n"
"Lab4 executes Lab4()\n\n"
"robot launches the Robot() thread\n\n"
"dft displays dft data\n\n"
"clear clears the terminal output and LCD display\n\n"
"? shows this help menu\n\n");
}
// Takes user input through serial console
// Loops infinitely, processing commands
void Interpreter(void){
char line[MAX_CMD_LEN];
char *arg;
while(1){
UART_OutString("\n> ");
readLine(line, MAX_CMD_LEN);
if(line[0] == 0) continue;
arg = findArg(line);
switch(line[0]){
case '?':
displayHelp();
break;
case 'f': // format
UART_OutString("Formatting disk...\n");
OS_bWait(&LCDFree);
if(eFile_Format()){
OS_bSignal(&LCDFree);
UART_OutString("Format failed\n");
}else if(eFile_Mount()){
OS_bSignal(&LCDFree);
UART_OutString("Format complete, mount failed\n");
}else{
OS_bSignal(&LCDFree);
UART_OutString("Format complete\n");
}
break;
case 'c': // cd or clear
if(line[1] == 'd'){ // cd
if(!arg || (arg[0] != '0' && arg[0] != '1') || arg[1] != 0){
UART_OutString("Usage: cd 0 or cd 1\n");
}else{
unsigned char dirID = arg[0] - '0';
OS_bWait(&LCDFree);
if(eFile_SelectDirectory(dirID)){
OS_bSignal(&LCDFree);
UART_OutString("cd failed\n");
}else{
OS_bSignal(&LCDFree);
currentDirectory = dirID;
}
}
}else if(line[1] == 'l'){ // clear
UART_OutString("\033[2J\033[H");
OS_bWait(&LCDFree);
ST7735_FillScreen(0);
OS_bSignal(&LCDFree);
}else{
UART_OutString("Unknown command. Enter ? for help.\n");
}
break;
case 'l': // ls or Lab4
if(line[1] == 's'){ // ls
OS_bWait(&LCDFree);
if(eFile_DOpen("")){
OS_bSignal(&LCDFree);
UART_OutString("ls failed to open directory\n");
}else{
char *name;
unsigned long size;
unsigned int num = 0;
unsigned long total = 0;
UART_OutString("\nContents of Directory ");
UART_OutUDec(currentDirectory);
UART_OutString("\n\n");
while(eFile_DirNext(&name, &size) == 0){
UART_OutString("Filename = "); UART_OutString(name); UART_OutString(" ");
UART_OutString("Size (bytes)= "); UART_OutUDec(size); UART_OutString("\n");
total += size;
num++;
}
UART_OutString("\nNumber of Files = "); UART_OutUDec(num); UART_OutString("\n");
UART_OutString("Number of Bytes = "); UART_OutUDec(total); UART_OutString("\n");
eFile_DClose();
OS_bSignal(&LCDFree);
}
}else{
UART_OutString("Unknown command. Enter ? for help.\n");
}
break;
case 'L': // Lab4
UART_OutString("Lab4 data\n");
Lab4();
break;
case 's': // show
if(!arg || arg[0] == 0){
UART_OutString("Usage: show [filename]\n");
}else{
OS_bWait(&LCDFree);
if(eFile_ROpen(arg)){
OS_bSignal(&LCDFree);
UART_OutString("File not found\n");
}else{
char data; int status;
UART_OutString("\n--- Contents of "); UART_OutString(arg); UART_OutString(" ---\n");
do{
status = eFile_ReadNext(&data);
if(status == 0) UART_OutChar(data);
}while(status == 0);
eFile_RClose();
OS_bSignal(&LCDFree);
UART_OutString("--- End of file ---\n");
}
}
break;
case 'd': // delete or dft
if(line[1] == 'e'){ // delete
if(!arg || arg[0] == 0){
UART_OutString("Usage: delete [filename]\n");
}else{
OS_bWait(&LCDFree);
if(eFile_Delete(arg)){
OS_bSignal(&LCDFree);
UART_OutString("Delete failed\n");
}else{
OS_bSignal(&LCDFree);
UART_OutString("Deleted\n");
}
}
}else if(line[1] == 'f'){ // dft
UART_OutString("DFT data\n");
DFT();
}else{
UART_OutString("Unknown command. Enter ? for help.\n");
}
break;
case 'r': // robot
UART_OutString("Launching Robot\n");
OS_AddThread(&Robot, 128, 1);
break;
default:
UART_OutString("Unknown command. Enter ? for help.\n");
break;
}
}
}