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085c1023a6
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6a914a6eaa
1 changed files with 93 additions and 86 deletions
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@ -94,9 +94,20 @@ int result = 0;
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unsigned int current_base = MODE_DEC;
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unsigned int operation = OP_NONE;
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unsigned char result_displayed = 0;
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unsigned int key = 0xFF;
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unsigned int last_key = 0xFF;
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unsigned int stable = 0;
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unsigned int mode_held = 0;
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unsigned int mode_press_counter = 0;
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unsigned int key_pressed_with_mode = 0;
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unsigned int mode_current = 0;
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int is_operator_key = 0;
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int operator_mode = 0;
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unsigned int seg_pattern = 0;
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void delay(volatile unsigned int d) {
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while(d--) __NOP();
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while(d--)
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__NOP();
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}
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void lcd_delay(unsigned long r) {
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@ -213,21 +224,22 @@ void display_status(void){
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if(operation != OP_NONE) {
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// Show operation pending
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lcd_print_str("Op:");
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if(operation == OP_ADD) lcd_data('+');
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else if(operation == OP_SUB) lcd_data('-');
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else if(operation == OP_MUL) lcd_data('*');
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if(operation == OP_ADD)
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lcd_data('+');
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else if(operation == OP_SUB)
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lcd_data('-');
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else if(operation == OP_MUL)
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lcd_data('*');
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lcd_print_str(" Val:");
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lcd_print_num(stored_num, current_base);
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lcd_print_str(" ");
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}
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else if(result_displayed){
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} else if(result_displayed) {
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// Show result
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lcd_print_str("Res: ");
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lcd_print_num(result, current_base);
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lcd_print_str(" ");
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}
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else {
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} else {
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// Show current input
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lcd_print_str("Inp: ");
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lcd_print_num(input_num, current_base);
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@ -264,10 +276,14 @@ unsigned int is_mode_button_pressed(void){
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}
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unsigned int is_valid_digit(unsigned int key) {
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if(key >= 16) return 0;
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if(current_base == MODE_BIN && key >= 2) return 0;
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if(current_base == MODE_OCT && key >= 8) return 0;
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if(current_base == MODE_DEC && key >= 10) return 0;
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if(key >= 16)
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return 0;
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if(current_base == MODE_BIN && key >= 2)
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return 0;
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if(current_base == MODE_OCT && key >= 8)
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return 0;
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if(current_base == MODE_DEC && key >= 10)
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return 0;
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return 1;
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}
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@ -292,12 +308,6 @@ void change_mode(void){
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}
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int main(void) {
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unsigned int key, last_key = 0xFF;
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unsigned int stable = 0;
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unsigned int mode_held = 0;
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unsigned int mode_press_counter = 0;
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unsigned int key_pressed_with_mode = 0;
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// Configure pins
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LPC_PINCON->PINSEL0 = 0;
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LPC_PINCON->PINSEL1 = 0;
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@ -325,14 +335,15 @@ int main(void){
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for(;;) {
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// Check if MODE button is currently pressed
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unsigned int mode_current = is_mode_button_pressed();
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mode_current = is_mode_button_pressed();
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// Scan keypad
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key = scan_keypad();
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// Debounce keypad
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if(key == last_key) {
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if(stable < 5) stable++;
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if(stable < 5)
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stable++;
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} else {
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last_key = key;
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stable = 0;
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@ -344,7 +355,8 @@ int main(void){
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mode_held = 1;
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} else {
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// MODE button released
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if(mode_held && !key_pressed_with_mode && mode_press_counter < 50){
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if(mode_held && !key_pressed_with_mode &&
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mode_press_counter < 50) {
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// Short press without key combo = change mode
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change_mode();
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}
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@ -358,11 +370,11 @@ int main(void){
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// Key pressed and stable
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// Check if this is an operator key (A-E)
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int is_operator_key = (key >= 10 && key <= 14);
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is_operator_key = (key >= 10 && key <= 14);
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// In HEX mode, operators require MODE button
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// In other modes, operator keys work directly
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int operator_mode = 0;
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operator_mode = 0;
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if(current_base == MODE_HEX) {
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operator_mode = (mode_held && is_operator_key);
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} else {
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@ -379,22 +391,19 @@ int main(void){
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input_num = 0;
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result_displayed = 0;
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display_status();
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}
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else if(key == 11){ // B = Subtraction
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} else if(key == 11) { // B = Subtraction
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stored_num = input_num;
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operation = OP_SUB;
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input_num = 0;
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result_displayed = 0;
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display_status();
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}
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else if(key == 12){ // C = Multiplication
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} else if(key == 12) { // C = Multiplication
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stored_num = input_num;
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operation = OP_MUL;
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input_num = 0;
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result_displayed = 0;
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display_status();
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}
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else if(key == 13){ // D = Equals
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} else if(key == 13) { // D = Equals
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if(operation == OP_ADD)
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result = stored_num + input_num;
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else if(operation == OP_SUB)
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@ -408,8 +417,7 @@ int main(void){
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operation = OP_NONE;
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result_displayed = 1;
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display_status();
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}
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else if(key == 14){ // E = Clear
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} else if(key == 14) { // E = Clear
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input_num = 0;
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stored_num = 0;
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operation = OP_NONE;
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@ -417,14 +425,15 @@ int main(void){
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result_displayed = 0;
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display_status();
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}
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}
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else {
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} else {
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// DIGIT INPUT MODE
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if(is_valid_digit(key)) {
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result_displayed = 0;
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input_num = input_num * current_base + key;
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if(input_num > 32767) input_num = input_num % 32768;
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if(input_num < -32768) input_num = -32768;
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if(input_num > 32767)
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input_num = input_num % 32768;
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if(input_num < -32768)
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input_num = -32768;
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display_status();
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}
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}
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@ -433,18 +442,14 @@ int main(void){
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}
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// ===== STATE MACHINE DISPLAY ON 7-SEGMENT =====
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unsigned int seg_pattern;
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if(operation == OP_NONE && result_displayed == 0) {
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seg_pattern = 0x06; // Display '1'
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}
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else if(operation != OP_NONE) {
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} else if(operation != OP_NONE) {
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seg_pattern = 0x5B | 0x80; // Display '2' with DP
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}
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else if(result_displayed == 1) {
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} else if(result_displayed == 1) {
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seg_pattern = 0x4F | 0x80; // Display '3' with DP
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}
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else {
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} else {
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seg_pattern = 0x3F; // Display '0'
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}
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@ -455,4 +460,6 @@ int main(void){
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delay(3000);
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}
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return 0;
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}
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