[求助]
MSP430F449 LCD COMx口用示波器测不到波形
跑的是官方的例程
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- *
- * MSP430 code examples are self-contained low-level programs that typically
- * demonstrate a single peripheral function or device feature in a highly
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- * register values and settings such as the clock configuration and care must
- * be taken when combining code from several examples to avoid potential side
- * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
- * for an API functional library-approach to peripheral configuration.
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- //*****************************************************************************
- // MSP-FET430P440 Demo - LCD, Display "6543210" on STK/EVK LCD
- //
- // Description: Displays "6543210" on MSP-EVK430S320 LCD.
- // ACLK = LFXT1 = 32768Hz, MCLK = SMCLK = default DCO = 32 x ACLK = 1048576Hz
- // //* An external watch crystal between XIN & XOUT is required for ACLK *//
- //
- // Connections MSP430 -> LCD
- // -------------------------
- //
- // T.I. MSP-EVK430S320
- // MSP430F449 6.5 digit 4 mux LCD
- // #T218010
- // /|\ --------------- --------------
- // | | COM3 |-----|2 COM4 |
- // --|RST COM2 |-----|1 COM3 |
- // | COM1 |-----|3 COM2 |
- // | COM0 |-----|4,20 COM1 |
- // -|XIN SEG0 |-----|19 |
- // 32kHz| SEG1 |-----|18 |
- // -|XOUT SEG2 |-----|17 |
- // | SEG3 |-----|16 |
- // | SEG4 |-----|15 |
- // | SEG5 |-----|14 |
- // | SEG6 |-----|13 |
- // | SEG7 |-----|12 |
- // +-|R33 SEG8 |-----|11 |
- // 1M | SEG9 |-----|10 |
- // +-|R23 SEG10|-----|9 |
- // 1M | SEG11|-----|8 |
- // +-|R13 SEG12|-----|7 |
- // 1M | SEG13|-----|6 |
- // +-|R03 SEG14|-----|5 (bits C,E,H |
- // | | | | of digit 7)|
- // Vss --------------- --------------
- //
- // M. Buccini / H. Grewal
- // Texas Instruments Inc.
- // Feb 2005
- // Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.21A
- //*****************************************************************************
- #include <msp430.h>
- const char digit[10] =
- {
- 0xB7, /* "0" LCD segments a+b+c+d+e+f */
- 0x12, /* "1" */
- 0x8F, /* "2" */
- 0x1F, /* "3" */
- 0x3A, /* "4" */
- 0x3D, /* "5" */
- 0xBD, /* "6" */
- 0x13, /* "7" */
- 0xBF, /* "8" */
- 0x3F /* "9" */
- };
- int main(void)
- {
- volatile unsigned int i; // Use volatile to prevent removal
- // by compiler optimization
- WDTCTL = WDTPW + WDTHOLD; // Stop WDT
- FLL_CTL0 |= XCAP14PF; // Configure load caps
- for (i = 0; i < 10000; i++); // Delay for 32 kHz crystal to
- // stabilize
- LCDCTL = LCDON + LCD4MUX + LCDSG0_4; // LCD on, 4-Mux, segments S0-S27
- BTCTL = BT_fLCD_DIV128; // LCD clock freq is ACLK/128
- P5SEL = 0xFC; // Select P5.2-7 as Com and Rxx
- for (;;)
- {
- unsigned char x;
- for (x=0; x<7; x++)
- {
- LCDMEM[x] = digit[x]; // Display "6543210"
- }
- }
- }
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