//In the original state, P1.6 is bright and P1.0 is dark. The state machine is used to detect the key. When pressed and released, P1.0 and P1.6 flip.
//
// MSP430G2xx3
// -----------------
// /|| XIN|-
// | | |
// --|RST XOUT|-
// P1.3|KEY P1.6|-->LED
// | P1.0|-->LED
// Authorhttp ://jiwm.blog.163.com
// Built with IAR Embedded Workbench Version: 5.40
/
// Timer A0 interrupt service routine
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{ TACCTL0&=~ CCIE; //Disable interrupt
static unsigned char KEY_State=0; //Key state variable
switch(KEY_State) //Process key state
{case NOKEY: //Key processing when no key is pressed
if ((P1IN&BIT3)==0)
{KEY_State=PUSH_KEY; //After pressing the key, enter the short press state
}
break;
case PUSH_KEY: //Perform key processing in the short press state
if((P1IN&BIT3)!=0) //Release the key, consider it as a short press, and process it
{KEY=1; //Key assignment
KEY_State=NOKEY; //Return to the unpressed state
}
break;
}
TACCTL0|= CCIE; //Open interrupt
}
Keywords：MSP430G2553
Reference address：MSP430G2553 test program (state machine detection button)
//
// MSP430G2xx3
// -----------------
// /|| XIN|-
// | | |
// --|RST XOUT|-
// P1.3|KEY P1.6|-->LED
// | P1.0|-->LED
// Authorhttp ://jiwm.blog.163.com
// Built with IAR Embedded Workbench Version: 5.40
/
// Timer A0 interrupt service routine
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{ TACCTL0&=~ CCIE; //Disable interrupt
static unsigned char KEY_State=0; //Key state variable
switch(KEY_State) //Process key state
{case NOKEY: //Key processing when no key is pressed
if ((P1IN&BIT3)==0)
{KEY_State=PUSH_KEY; //After pressing the key, enter the short press state
}
break;
case PUSH_KEY: //Perform key processing in the short press state
if((P1IN&BIT3)!=0) //Release the key, consider it as a short press, and process it
{KEY=1; //Key assignment
KEY_State=NOKEY; //Return to the unpressed state
}
break;
}
TACCTL0|= CCIE; //Open interrupt
}
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msp430g2553: dual line 12864 library program
(Display) msp430g2553: dual-line 12864 library program ************************************************************************************************** LCD12864.H **************************************************************** LCD12864 2-wire program rs (CS) has been externally connected to a high level r
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