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:: Sounds like a proper "How To" page needs to
:: be written if/when it's working

If your German is adequate, this blog page might help, unfortunately the=20
only person who seems to have succeeded wants to charge for his code.

http://www.mikrocontroller.net/topic/75589

A question (initialisation not working):

Genau so sieht es bei mir auch aus.
Ich finde das ziemlich fies, dass man nicht vom Display lesen kann,
nicht mal den Status, so wei? ich nicht einmal wo das Problem liegt.
Vielleicht nur eine kleine Leitung falsch? Man wei? es leider nicht...
Aber wenn ich mir wenigstens beim Code sicher sein k?nnte, w?re das
schon mal ein Fortschritt!

Meine Initialisierung:

------------------------------------------------------------------------
Reset HIGH
200ms warten
Reset LOW
------------------------------------------------------------------------
spi_master_send_char(0x40); // Display start line 0

spi_master_send_char(0xA1); // ADC reverse

spi_master_send_char(0xC0); // Normal COM0~COM63

spi_master_send_char(0xA6); // Display normal

spi_master_send_char(0xA2); // Set bias 1/9 (Duty 1/65)

spi_master_send_char(0x2F); // Booster, Regulator and Follower on

spi_master_send_char(0xF8); // Set internal Booster to 4x
spi_master_send_char(0x00);

spi_master_send_char(0x27); // Contrast set
spi_master_send_char(0x81);
spi_master_send_char(0x16);

spi_master_send_char(0xAC); // No indicator
spi_master_send_char(0x00);

spi_master_send_char(0xAF); // Display on
------------------------------------------------------------------------

Die spi_master_send_char(unsigned char) sieht so aus:


void spi_master_send_char (unsigned char c)
{
  SPDR =3D c;                    // sende Zeichen
  while (!(SPSR & (1<<SPIF)))  // warten bis Senden moeglich
  {
  }
  _delay_us(100);
}

(vorher nat?rlich spi init)


The answer:

Wer tut das nicht.

Ausschnitt aus meiner Code f?r das Modul zur Initialisierung ?ber SPI
(Prinzip f?r Parallel identisch):

void lcd_contrast_intern( uint8_t contrast )
{
  /* "electronic volume" */
  lcd_spi_write( ST7565R_ELECTRONIC_VOLUME_MODE_SET );
  lcd_spi_write( ST7565R_ELECTRONIC_VOLUME_REGISTER_SET | ( contrast & 0x3F=
=20
) );
}

void lcd_init( uint8_t options )
{
  /* init according to the EA DOGM datasheet=20
     with additions from the ST7565R datasheet */

  // Reset module (hardware)
  lcd_hw_reset( 1 );
  // Wait time power stabilize
  delay_ms( 50 );
  // Release reset
  lcd_hw_reset( 0 );
  // wait reset-circuit finished
  delay_10usec();

  lcd_cs_select();
  lcd_rs_command();

  // Display start line 0
  lcd_spi_write( ST7565R_DISPLAY_START_LINE | 0);
#ifdef EA_DOGM_TOPVIEW
  // ADC set normal
  lcd_spi_write( ST7565R_ADC_SELECT_NORMAL );
  // Common output mode normal COM63-COM0
  lcd_spi_write( ST7565R_COMMON_OUTPUT_MODE_REVESE | 0 );
#else /* bottom view */
  // ADC set reverse
  lcd_spi_write( ST7565R_ADC_SELECT_REVERSE );
  // Common output mode normal COM0-COM63
  lcd_spi_write( ST7565R_COMMON_OUTPUT_MODE_NORMAL | 0 );
#endif /* EA_DOGM_TOPVIEW */
  // Display normal
  lcd_spi_write( ST7565R_DISPLAY_NORMAL  );
  // Set bias 1/9
  lcd_spi_write( ST7565R_LCD_BIAS_SET_1_9 );

#ifdef EA_DOGM_SINGLE_SUPPLY
  // booster, regulator, follower on
  lcd_spi_write( ST7565R_POWER_CONTROL_SET |
    ST7565R_BOOSTER_MASK | ST7565R_REGULATOR_MASK |
    ST7565R_FOLLOWER_MASK );
  // internal booster to 4x
  lcd_spi_write( ST7565R_BOOSTER_RADIO_SET );
  lcd_spi_write( ST7565R_BOOSTER_STEP_UP_2x3x4x );
#else /* dual - untested */
  // booster off, regulator and follower on
  lcd_spi_write( ST7565R_POWER_CONTROL_SET |
    ST7565R_REGULATOR_MASK | ST7565R_FOLLOWER_MASK );
#endif

  // "contrast set"
  // V0 resistor-ratio (see table 11, here 6.5 -> 0b111 =3D 0x07)
  lcd_spi_write( ST7565R_V0_VOLTAGE_REG_INT_RES_RAT_SET | 0x07  );
 =20
  // Electronic volume
  lcd_contrast_intern( LCD_CONTRAST_DEFAULT );
 =20
  // static indicator off
  lcd_spi_write( ST7565R_STATIC_INDICATOR_OFF  );
  lcd_spi_write( ST7565R_STATIC_INDICATOR_REGISTER_OFF );
  // display on
  lcd_spi_write( ST7565R_DISPLAY_ON  );

  lcd_rs_data();
  lcd_cs_unselect();
}

Colin
--
cdb, colin@btech-online.co.uk on 6/04/2011
=20
Web presence: www.btech-online.co.uk =20
=20
Hosted by:  www.justhost.com.au
=20
=20

=20
=20


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