test44x_lcd03.c

MSP430F44X系列的c代码 芯片为449

//******************************************************************************
//  MSP-FET430P440 Demo - LCD, displays numbers on 4 multiplex rate LCD
//
//  Description "FET440_4muxLCD": This program displays digits stored in the
//  variable "value" on a 4 mux LCD, then waits in low power mode 3. To use the
//  program run it as is or assign a different BCD number (digits 0-9) to the
//  variable "value".
//  //*An external watch crystal on XIN XOUT is required for ACLK*//	
//
//                                 Connections MSP430 -> LCD
//                                 -------------------------
//
//                                T.I.                  T.I.
//                           MSP430x44x MCU   STK/EVK 6.5 digit 4 mux LCD
//                                                    LSD 048
//                           ---------------       --------------
//                          |          COM3 |-----|2    COM4     |
//                          |          COM2 |-----|1    COM3     |
//                          |          COM1 |-----|3    COM2     |
//                          |          COM0 |-----|4,20 COM1     |
//                          |          SEG0 |-----|19            |
//                          |          SEG1 |-----|18            |
//                          |          SEG2 |-----|17            |
//                          |          SEG3 |-----|16            |
//                          |          SEG4 |-----|15            |
//                          |          SEG5 |-----|14            |
//                          |          SEG6 |-----|13            |
//                          |          SEG7 |-----|12            |
//                          |          SEG8 |-----|11            |
//                          |          SEG9 |-----|10            |
//                          |          SEG10|-----|9             |
//                          |          SEG11|-----|8             |
//                          |          SEG12|-----|7             |
//                          |          SEG13|-----|6             |
//                          |          SEG14|-----|5 (bits C,E,H |
//                          |               |     |   of digit 7)|
//                          |               |      --------------
//                          |               |
//                           ---------------
//
//                   NOTE: Pin R03 on the MSP430 must be connected to GND
//
//  Lierda, Inc
//  February 2006.03
//  Built with IAR Embedded Workbench Version: 3.40a
//  ID：  MSP430-TEST44X
//  DATA：2005-7-12
//  REV： 2.0A
//  1、程序功能：该程序是用 F449的的LCD内部显示功能，来控制LCD 显示"430449"
//  2、硬件连接：必须连接所有短接器
//  3、显示数据：430449
//******************************************************************************
#include "msp430x44x.h"

char digit[10] = {
0x7B,  // "0"    LCD segments a+b+c+d+e+f    lcd= lsd048
0x12,  // "1"
0x4F,  // "2"
0x1F,  // "3"
0x36,  // "4"
0x3D,  // "5"
0x7D,  // "6"
0x13,  // "7"
0x7F,  // "8"
0x3F   // "9"
};

void main(void)
{
  unsigned int value = 43044;                         // number to display, range = 0 to 65535

  char *LCD = LCDMEM;
  unsigned int i;

  WDTCTL = WDTPW + WDTHOLD;                           // Stop watchdog timer
  FLL_CTL0 = XCAP18PF;                                //set load capacitance for 32k xtal

  // Initialize LCD driver (4Mux mode)
  LCDCTL = 0x03D;                                     // 4mux LCD, segs16-23 = outputs
  BTCTL  = BTFRFQ1;                                   // set LCD frame freq = ACLK
  P5SEL  = 0xFC;                                      // set Rxx and COM pins for LCD

  // clear LCD memory to clear display
  for (i=0; i<19; i++)
  {
    LCD[i] = 0;
  }

  // display contents of the variable value
  for (i=1; i<6; i++)
  {
    unsigned  int j=0;
    LCD[i] = digit[value%10];                         // remainder = character in table to display
    value = value/10;                                 // shifts right so next character can be displayed
    LCD[j] = 0x3f;                                    // display 9   result 430449
  }

  LPM3;                                               // enter low power mode 3
}