From 6693a1a83136508167c4854057d0aef4198987d5 Mon Sep 17 00:00:00 2001 From: sherlock Date: Wed, 29 Oct 2025 12:43:01 +0530 Subject: [PATCH] proj --- ES/Project/code.c | 165 +++++++++++++++++++++++++--------------------- 1 file changed, 89 insertions(+), 76 deletions(-) diff --git a/ES/Project/code.c b/ES/Project/code.c index a77d74c..6dfee71 100644 --- a/ES/Project/code.c +++ b/ES/Project/code.c @@ -2,36 +2,22 @@ /* =================================================== * SMART CALCULATOR - LPC176x - * Supports BIN, BASE4, OCT, DEC, and HEX modes with - * 4x4 keypad, LCD, and 7-segment display. - * --------------------------------------------------- - * DEC/BIN/BASE4/OCT : Operators B–F work directly - * HEX : Operators B–F require MODE pressed + * Supports BIN, BASE4, OCT, DEC, and HEX + * with 4x4 keypad, LCD, and 7-seg status. + * + * BIN/BASE4/OCT/DEC: operators B–F direct + * HEX: operators B–F only when MODE button held + * Arithmetic is performed modulo the current base * =================================================== */ -// 7-Segment patterns for 0–F +/* 7-Segment patterns for 0–F */ const unsigned char seven_seg[16] = { 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, 0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71 }; -/* ===== Pin Mapping ===== - * Keypad (4x4): - * Columns: P0.15–P0.18 (Outputs) - * Rows: P0.19–P0.22 (Inputs, pull-ups) - * - * 7-Segment: - * Segments: P0.4–P0.11 - * Digit Enable: P1.23 - * - * LCD: - * Data: P0.23–P0.26, RS: P0.27, EN: P0.28 - * - * Mode Button: P2.12 (active low) - */ - -/* ===== MACROS ===== */ +/* ===== Pin & Mode Definitions ===== */ #define COL_BASE 15 #define ROW_BASE 19 #define COL_MASK (0x0F << COL_BASE) @@ -47,20 +33,21 @@ const unsigned char seven_seg[16] = { #define MODE_BUTTON (1 << 12) +/* Supported Bases */ #define MODE_BIN 2 #define MODE_BASE4 4 #define MODE_OCT 8 #define MODE_DEC 10 #define MODE_HEX 16 +/* Operators */ #define OP_NONE 0 #define OP_ADD 1 #define OP_SUB 2 #define OP_MUL 3 -/* ===== Global Variables (Predeclared) ===== */ +/* ===== Global Variables (predeclared) ===== */ int input_num; -unsigned int seg_pattern; int stored_num; int result; unsigned int current_base; @@ -71,7 +58,7 @@ unsigned char result_displayed; unsigned int key, last_key, stable; unsigned int button_state, last_button_state, button_stable; -/* ===== Function Declarations ===== */ +/* ===== Function Prototypes ===== */ void delay(volatile unsigned int d); void lcd_delay(unsigned long r); void lcd_write_nibble(unsigned char nibble, unsigned char is_data); @@ -89,8 +76,9 @@ unsigned int is_valid_digit(unsigned int key); void change_mode(void); void operate(unsigned int op); void perform_operation(void); +unsigned char is_operator_active(unsigned int key, unsigned int mode_button); -/* ===== Delays ===== */ +/* ====== Utility ====== */ void delay(volatile unsigned int d) { while (d--) __NOP(); @@ -102,7 +90,7 @@ void lcd_delay(unsigned long r) { ; } -/* ===== LCD ===== */ +/* ===== LCD ==== */ void lcd_write_nibble(unsigned char nibble, unsigned char is_data) { unsigned long temp; temp = (nibble & 0x0F) << LCD_DATA_SHIFT; @@ -149,11 +137,11 @@ void lcd_init(void) { } void lcd_print_str(const char *str) { - while (*str) { + while (*str) lcd_data(*str++); - } } +/* ===== Print number in base ===== */ void lcd_print_num(int num, unsigned int base) { char buffer[17]; int i = 0; @@ -184,11 +172,12 @@ void lcd_print_num(int num, unsigned int base) { num /= 10; } } + while (i > 0) lcd_data(buffer[--i]); } -/* ===== Display Handling ===== */ +/* ===== Display handlers ===== */ void display_mode(void) { lcd_cmd(0x80); lcd_print_str("Mode: "); @@ -206,7 +195,18 @@ void display_mode(void) { void display_input(void) { lcd_cmd(0xC0); - lcd_print_str("Inp: "); + lcd_print_str("Inp("); + if (current_base == MODE_BIN) + lcd_print_str("2"); + else if (current_base == MODE_BASE4) + lcd_print_str("4"); + else if (current_base == MODE_OCT) + lcd_print_str("8"); + else if (current_base == MODE_DEC) + lcd_print_str("10"); + else + lcd_print_str("16"); + lcd_print_str("): "); lcd_print_num(input_num, current_base); lcd_print_str(" "); } @@ -220,7 +220,7 @@ void display_operator_feedback(const char *op_symbol) { display_input(); } -/* ===== Input Handling ===== */ +/* ====== Scan Keypad ====== */ unsigned int scan_keypad(void) { unsigned int col, row; unsigned int row_bits; @@ -236,7 +236,7 @@ unsigned int scan_keypad(void) { for (row = 0; row < 4; row++) { if ((row_bits & (1 << row)) == 0) { LPC_GPIO0->FIOSET = COL_MASK; - return col * 4 + row; + return (col * 4 + row); } } } @@ -245,11 +245,12 @@ unsigned int scan_keypad(void) { return 0xFF; } +/* ===== Mode button ===== */ unsigned int scan_mode_button(void) { return ((LPC_GPIO2->FIOPIN & MODE_BUTTON) == 0) ? 1 : 0; } -/* ===== Mode Switching ===== */ +/* ===== Modes and Validation ===== */ void change_mode(void) { if (current_base == MODE_DEC) current_base = MODE_BIN; @@ -261,6 +262,7 @@ void change_mode(void) { current_base = MODE_HEX; else current_base = MODE_DEC; + display_mode(); } @@ -275,10 +277,10 @@ unsigned int is_valid_digit(unsigned int key) { return 0; if (current_base == MODE_DEC && key >= 10) return 0; - return 1; // HEX accepts all 0-F + return 1; } -/* ===== Operations ===== */ +/* ===== Operator Handling ===== */ void operate(unsigned int op) { stored_num = input_num; operation = op; @@ -286,6 +288,7 @@ void operate(unsigned int op) { result_displayed = 0; } +/* perform_operation: arithmetic within the active base */ void perform_operation(void) { if (operation == OP_ADD) result = stored_num + input_num; @@ -296,8 +299,27 @@ void perform_operation(void) { else result = input_num; + /* Base-aware modular arithmetic for non-DEC modes */ + if (current_base != MODE_DEC) { + if (result < 0) + result = (result % current_base + current_base) % current_base; + else + result %= current_base; + } + lcd_cmd(0xC0); - lcd_print_str("Res: "); + lcd_print_str("Res("); + if (current_base == MODE_BIN) + lcd_print_str("2"); + else if (current_base == MODE_BASE4) + lcd_print_str("4"); + else if (current_base == MODE_OCT) + lcd_print_str("8"); + else if (current_base == MODE_DEC) + lcd_print_str("10"); + else + lcd_print_str("16"); + lcd_print_str("): "); lcd_print_num(result, current_base); lcd_print_str(" "); @@ -306,9 +328,15 @@ void perform_operation(void) { result_displayed = 1; } +unsigned char is_operator_active(unsigned int key, unsigned int mode_button) { + if (current_base == MODE_HEX) + return (mode_button && key >= 11 && key <= 15); + else + return (key >= 11 && key <= 15); +} + /* ===== MAIN ===== */ int main(void) { - // Initialize globals input_num = stored_num = result = 0; current_base = MODE_DEC; operation = OP_NONE; @@ -318,25 +346,21 @@ int main(void) { stable = button_stable = 0; button_state = last_button_state = 0; - // Configure Pins + /* Configure pins */ LPC_PINCON->PINSEL0 = 0; LPC_PINCON->PINSEL1 = 0; LPC_PINCON->PINSEL3 = 0; LPC_PINCON->PINSEL4 = 0; - // Keypad setup LPC_GPIO0->FIODIR |= COL_MASK; LPC_GPIO0->FIODIR &= ~ROW_MASK; LPC_GPIO0->FIOSET = COL_MASK; - // Mode button setup LPC_GPIO2->FIODIR &= ~MODE_BUTTON; - // 7-Segment setup LPC_GPIO0->FIODIR |= (0xFF << SEG_SHIFT); LPC_GPIO1->FIODIR |= DIGIT_EN; - // LCD setup LPC_GPIO0->FIODIR |= LCD_DATA_MASK | LCD_RS | LCD_EN; lcd_init(); @@ -347,7 +371,7 @@ int main(void) { key = scan_keypad(); button_state = scan_mode_button(); - // Debounce keypad + /* Debounce keypad */ if (key == last_key) { if (stable < 5) stable++; @@ -356,7 +380,7 @@ int main(void) { stable = 0; } - // Debounce mode button + /* Debounce mode button */ if (button_state == last_button_state) { if (button_stable < 5) button_stable++; @@ -365,64 +389,53 @@ int main(void) { button_stable = 0; } - // Cycle through modes + /* Handle mode change */ if (button_stable == 3 && button_state == 1) { change_mode(); button_stable = 5; } - // Handle keypad press + /* Handle key event */ if (stable == 3 && key != 0xFF) { - unsigned char allow_operator = 0; + unsigned char op_allowed = is_operator_active(key, button_state); - // Operators allowed directly for all modes except HEX (must hold mode) - if (current_base == MODE_HEX && button_state == 1) - allow_operator = 1; - else if (current_base != MODE_HEX) - allow_operator = 1; - - // Operator Keys: B–F (indices 11–15) - if (allow_operator) { - if (key == 11) { // B = + + if (op_allowed) { + if (key == 11) { operate(OP_ADD); display_operator_feedback("+"); - } else if (key == 12) { // C = CLR + } else if (key == 12) { input_num = stored_num = result = 0; operation = OP_NONE; result_displayed = 0; display_operator_feedback("CLR"); - } else if (key == 13) { // D = - + } else if (key == 13) { operate(OP_SUB); display_operator_feedback("-"); - } else if (key == 14) { // E = * + } else if (key == 14) { operate(OP_MUL); display_operator_feedback("*"); - } else if (key == 15) { // F = = + } else if (key == 15) { perform_operation(); - } else if (is_valid_digit(key)) { - result_displayed = 0; - input_num = input_num * current_base + key; - display_input(); - } - } else { - if (is_valid_digit(key)) { - result_displayed = 0; - input_num = input_num * current_base + key; - display_input(); } + } else if (is_valid_digit(key)) { + result_displayed = 0; + input_num = input_num * current_base + key; + display_input(); } + stable = 5; } - // ===== STATE DISPLAY on 7-Segment ===== + /* Update 7-seg state display */ + unsigned int seg_pattern; if (operation == OP_NONE && result_displayed == 0) - seg_pattern = 0x06; // '1' - Input mode + seg_pattern = 0x06; // '1' else if (operation != OP_NONE) - seg_pattern = 0x5B | 0x80; // '2' + DP - Waiting for 2nd operand + seg_pattern = 0x5B | 0x80; // '2' + dp else if (result_displayed == 1) - seg_pattern = 0x4F | 0x80; // '3' + DP - Result shown + seg_pattern = 0x4F | 0x80; // '3' + dp else - seg_pattern = 0x3F; // '0' - Reset + seg_pattern = 0x3F; // '0' LPC_GPIO0->FIOCLR = (0xFF << SEG_SHIFT); LPC_GPIO0->FIOSET = (seg_pattern << SEG_SHIFT);