msp430x47xx_lcda_05.c

MSP430F47x3系列TI官方示例代码

//******************************************************************************
//    MSP430x47xx Demo - LCD_A Put "0123456" on SBLCDA4 LCD with charge pump
//
//  Description; Put "0123456" on SBLCDA4 LCD. Charge pump is enabled.
//  ACLK = LFXT1 = 32768, MCLK = SMCLK = DCO = 32xACLK = 1.048576MHz
//  //*An external watch crystal is required on XIN/XOUT for ACLK*//	
// Note: A 4.7 uF or larger capacitor must be connected from pin LCDCAP to 
// ground when the internal charge pump is enabled. Otherwise, damage can occur.
//
//               MSP430x47xx
//           -----------------
//       /|\|              XIN|-
//        | |                 | 32kHz
//        --|RST          XOUT|-         SBLCDA4 
//          |                 |        ___________
//          |              S4 |------>|14         |
//          |              S5 |------>|13         | 
//          |             ..  | ....  |..         |
//          |             S17 |------>|1          | 
//    ------|LCDCAP/R33   COM0|------>|15         |
//   CAP    |             COM1|------>|16         | 
//  TO GND  |             COM2|------>|17         | 
//          |             COM3|------>|18         |
//          |             S18 |------>|19         | 
//          |             S19 |------>|20         | 
//          |              .. | ....  |..         | 
//    ------|LCDCAP/R33   S25 |------>|26         |     
//          |_________________|       |___________| 
//
//  P. Thanigai / K.Venkat
//  Texas Instruments Inc.
//  November 2007
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.42A
//*****************************************************************************
#include <msp430x47x4.h>

// LCD segment definitions.
#define h 0x80
#define e 0x40
#define g 0x20
#define f 0x10
#define d 0x08
#define c 0x04
#define b 0x02
#define a 0x01

const char char_gen[] = {                   // definitions for digits
  a+b+c+d+e+f,                              // Displays "0"
  b+c,                                      // Displays "1"
  a+b+d+e+g,                                // Displays "2"
  a+b+c+d+g,                                // Displays "3"
  b+c+f+g,                                  // Displays "4"
  a+c+d+f+g,                                // Displays "5"
  a+c+d+e+f+g,                              // Displays "6"
  a+b+c,                                    // Displays "7"
  a+b+c+d+e+f+g,                            // Displays "8"
  a+b+c+d+f+g                               // Displays "9"
};
void main(void)
{
  volatile unsigned int i;

  WDTCTL = WDTPW +WDTHOLD;                  // Stop WDT
  FLL_CTL0 |= XCAP14PF;                     // Configure load caps

  // Wait for xtal to stabilize
  do
  {
    IFG1 &= ~OFIFG;                           // Clear OSCFault flag
    for (i = 0x47FF; i > 0; i--);             // Time for flag to set
  }
  while ((IFG1 & OFIFG));                   // OSCFault flag still set?
  
  P5SEL = 0x1C;                             // Set COM pins for LCD
  LCDACTL = LCDON+LCD4MUX+ LCDFREQ_128;     // 4mux LCD, ACLK/32
  LCDAPCTL0 = 0x7E;                         // Segments 4-24
  LCDAVCTL0 = LCDCPEN;                      // charge pump enable
  LCDAVCTL1 = VLCD3;                        // to 3.02V

  for( i = 0; i < 20; i ++)
  {
    LCDMEM[i] = 0;                          // Clear LCD
  }

  for (i=2;i<9;i++)
  {
    LCDMEM[i] = char_gen[i-2];
  }
  
  _BIS_SR(LPM3_bits);                      // Enter LPM3

}