5.2 Implementing a Counter:

Write a code that shows an incrementing unsigned 16-bit counter on the display (0, 1, 2...). The counter goes up by one every second. Use the timer with interrupts based on the 32 KHz crystal. When button S1 is pushed, the counter goes to zero and continues counting. When button S2 is pushed, the counter jumps up by 1000 and continues counting. Interface the buttons with interrupts.

Use the following code, modify it to implement the above

// Sample code that prints 430 on the LCD monitor #include #define redLED BIT0 // Red at P1.0 #define greenLED BIT7 // Green at P9.7 void Initialize_LCD(); void lcd_write_uint16 (unsigned int n); // The array has the shapes of the digits (0 to 9) // Complete this array... const unsigned char LCD_Shapes[10] = {0xFC, 0x60, 0xDB, 0xF3, 0x67, 0xB7, 0xBF, 0xE0, 0xFF, 0xF7}; int main(void) { volatile unsigned int n; WDTCTL = WDTPW | WDTHOLD; // Stop WDT PM5CTL0 &= ~LOCKLPM5; // Enable GPIO pins P1DIR |= redLED; // Pins as output P9DIR |= greenLED; P1OUT |= redLED; // Red on P9OUT &= ~greenLED; // Green off // Initializes the LCD_C module Initialize_LCD(); // The line below can be used to clear all the segments //LCDCMEMCTL = LCDCLRM; // Clears all the segments // Display 430 on the rightmost three digits LCDM19 = LCD_Shapes[4]; LCDM15 = LCD_Shapes[3]; LCDM8 = LCD_Shapes[0]; // Flash the red LED for(;;) { for(n=0; n<=60000; n++) {} // Delay loop P1OUT ^= redLED; } return 0; } //********************************************************** // Initializes the LCD_C module // *** Source: Function obtained from MSP430FR6989s Sample Code *** void Initialize_LCD() { PJSEL0 = BIT4 | BIT5; // For LFXT // Initialize LCD segments 0 - 21; 26 - 43 LCDCPCTL0 = 0xFFFF; LCDCPCTL1 = 0xFC3F; LCDCPCTL2 = 0x0FFF; // Configure LFXT 32kHz crystal CSCTL0_H = CSKEY >> 8; // Unlock CS registers CSCTL4 &= ~LFXTOFF; // Enable LFXT do { CSCTL5 &= ~LFXTOFFG; // Clear LFXT fault flag SFRIFG1 &= ~OFIFG; }while (SFRIFG1 & OFIFG); // Test oscillator fault flag CSCTL0_H = 0; // Lock CS registers // Initialize LCD_C // ACLK, Divider = 1, Pre-divider = 16; 4-pin MUX LCDCCTL0 = LCDDIV__1 | LCDPRE__16 | LCD4MUX | LCDLP; // VLCD generated internally, // V2-V4 generated internally, v5 to ground // Set VLCD voltage to 2.60v // Enable charge pump and select internal reference for it LCDCVCTL = VLCD_1 | VLCDREF_0 | LCDCPEN; LCDCCPCTL = LCDCPCLKSYNC; // Clock synchronization enabled LCDCMEMCTL = LCDCLRM; // Clear LCD memory //Turn LCD on LCDCCTL0 |= LCDON; return; }