MSP430F4152 LCD_A

Other Parts Discussed in Thread: MSP430F4152, MSP430FG4616, MSP430FG4618

Hello,

I work with the MSP430F4152 using the Board of TI.

I took the example code of the MSP430F471xx which also has the LCD_A module.

I connencted a Cap at Pin R33 of  4.7uF (for  the charge pump) and also implemented the resistors between R03 to R13 of 100K and R13 to R23 100K and R23 to R33 100K.

and also connected the R03 to the ground.

Nothing is displayed althogh it works on the MSP430FG4616.

I also check the 32Khz Osc and it looks O.K.

Can you please advise back.

Thanks In Advance.

//    MSP430x471xx 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.
//
//               MSP430x471xx
//           -----------------
//       /|\|              XIN|-
//        | |                 | 32kHz
//        --|RST          XOUT|-         SBLCDA4
//          |                 |        ___________
//          |              S0 |------>|14         |
//          |              S1 |------>|13         |
//          |             ..  | ....  |..         |
//          |             S13 |------>|1          |
//    ------|LCDCAP/R33   COM0|------>|15         |
//   CAP    |             COM1|------>|16         |
//  TO GND  |             COM2|------>|17         |
//          |             COM3|------>|18         |
//          |             S14 |------>|19         |
//          |             S19 |------>|20         |
//          |              .. | ....  |..         |
//    ------|LCDCAP/R33   S21 |------>|26         |    
//          |_________________|       |___________|
//
//   K. Venkat
//   Texas Instruments Inc.
//   May 2009
//   Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 4.11B
//******************************************************************************
#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 =BIT1+BIT2+BIT3+BIT4;               // Set COM pins for LCD
  LCDACTL = LCDON+LCD4MUX+ LCDFREQ_128;     // 4mux LCD, ACLK/32
  LCDAPCTL0 = 0x7F;                         // Segments 0-24
  LCDAVCTL0 = LCDCPEN;                      // charge pump enable
  LCDAVCTL1 = VLCD3;                        // to 3.02V

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

  for (i=0;i<7;i++)
  {
    LCDMEM[i] = char_gen[i];
  }
 
  _BIS_SR(LPM3_bits);                      // Enter LPM3

}