четверг, 20 марта 2014 г.

LaunchPad + Nokia 5110 display

Попробовал подключить дисплей от Nokia 5110 к Launchpad. Что приятно, преподаватели курса позаботились и приготовили примерчик с готовыми библиотеками для работы с этим экраном. Поэтому кроме собственно подключения экрана делать ничего не пришлось. И на экране появилась вот такая рогатая морда.


После этого начинает выводиться текстовая информация.

Пару слов про подключение. Экран работает от 3 или 5 вольт. Как сказано в описании у продавца:
VCC - power input (3.3 v and 5 v, through experimental verification, there is no problem)
Ланчпад как раз даёт 3.3V. Ну я и подключил на VCC 3.3V. В итоге получил тусклое, еле различимое изображение. Сперва подумал, что брак у экрана. А потом сообразил, что я новичок и наверняка туплю. Посмотрел маркировку на экране, там написано 3-5V. Может быть мои 3.3V схема экрана приняла за 5V? Попробовал понизить напряжение и подключил питание через сопротивление и всё заработало нормально. О как.

Подсветка подключена тоже через ограничивающее сопротивление, чтобы ток был не более 80мА. Ланчпад, судя по описанию, дает до 300мА. У меня оба сопротивления на 220 Ом, так как меньше не было.

Ниже - тексты программы и библиотек, любезно предоставленные преподавателями.

Это сама программа.
// Nokia5110TestMain.c
// Runs on LM4F120/TM4C123
// Test the functions in Nokia5110.c by printing various
// things to the LCD.
// Daniel Valvano
// September 16, 2013

// Font table, initialization, and other functions based
// off of Nokia_5110_Example from Spark Fun:
// 7-17-2011
// Spark Fun Electronics 2011
// Nathan Seidle
// http://dlnmh9ip6v2uc.cloudfront.net/datasheets/LCD/Monochrome/Nokia_5110_Example.pde

/* This example accompanies the book
   "Embedded Systems: Real Time Interfacing to Arm Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013

 Copyright 2013 by Jonathan W. Valvano, valvano@mail.utexas.edu
    You may use, edit, run or distribute this file
    as long as the above copyright notice remains
 THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 For more information about my classes, my research, and my books, see
 http://users.ece.utexas.edu/~valvano/
 */

// Blue Nokia 5110
// ---------------
// Signal        (Nokia 5110) LaunchPad pin
// Reset         (RST, pin 1) connected to PA7
// SSI0Fss       (CE,  pin 2) connected to PA3
// Data/Command  (DC,  pin 3) connected to PA6
// SSI0Tx        (Din, pin 4) connected to PA5
// SSI0Clk       (Clk, pin 5) connected to PA2
// 3.3V          (Vcc, pin 6) power
// back light    (BL,  pin 7) not connected
// Ground        (Gnd, pin 8) ground

// Red SparkFun Nokia 5110 (LCD-10168)
// -----------------------------------
// Signal        (Nokia 5110) LaunchPad pin
// 3.3V          (VCC, pin 1) power
// Ground        (GND, pin 2) ground
// SSI0Fss       (SCE, pin 3) connected to PA3
// Reset         (RST, pin 4) connected to PA7
// Data/Command  (D/C, pin 5) connected to PA6
// SSI0Tx        (DN,  pin 6) connected to PA5
// SSI0Clk       (SCLK, pin 7) connected to PA2
// back light    (LED, pin 8) not connected

#include "Nokia5110.h"
#include "PLL.h"

//  function delays 3*ulCount cycles
void Delay(unsigned long ulCount){
  do{
    ulCount--;
    }while(ulCount);
}

// image of a longhorn
const char Longhorn[] = {
  0x08, 0x08, 0x08, 0x08, 0x08, 0x18, 0x18, 0x18, 0x38, 0x30, 0x30, 0x30, 0x70, 0xF0,
  0xE0, 0xC0, 0xC0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xC0, 0xE0, 0xE0, 0xF0, 0x70,
  0x70, 0x30, 0x30, 0x18, 0x18, 0x18, 0x18, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x01, 0x03, 0x03, 0x03, 0x07, 0x0F, 0x0E, 0x0C, 0x1C, 0x38, 0x38, 0xB8, 0xF8, 0xF0,
  0xF0, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xFC, 0xFC, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8,
  0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF0, 0xE0, 0xE0, 0xF0, 0xF0, 0xF0,
  0xF0, 0x78, 0x38, 0x3C, 0x1C, 0x1F, 0x0F, 0x07, 0x03, 0x03, 0x01, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x0F, 0x0F, 0x0F, 0x0F,
  0x0F, 0x07, 0x07, 0x07, 0x1F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x1F, 0x0F, 0x1F, 0x1F, 0x1F, 0x1F,
  0x1F, 0x1F, 0x1E, 0x0E, 0x04, 0x00, 0x00, 0x00, 0x0F, 0x05, 0x0B, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x07, 0x1F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0x1F, 0x07, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3C, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0x7F, 0x3F, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

// image of a longhorn loves 319k
const char Longhorn2[] = {
  0x08, 0x08, 0x08, 0x08, 0x08, 0x18, 0x18, 0x18, 0x38, 0x30, 0x30, 0x30, 0x70, 0xF0,
  0xE0, 0xC0, 0xC0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xC0, 0xE0, 0xE0, 0xF0, 0x70,
  0x70, 0x30, 0x30, 0x18, 0x18, 0x18, 0x18, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00,
  0xF0, 0x08, 0x04, 0x24, 0x24, 0xE4, 0x24, 0x24, 0x04, 0x04, 0x04, 0x04, 0x04, 0x08,
  0xF1, 0x03, 0x03, 0x03, 0x07, 0x0F, 0x0E, 0x0C, 0x1C, 0x38, 0x38, 0xB8, 0xF8, 0xF0,
  0xF0, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xFC, 0xFC, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8,
  0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF0, 0xE0, 0xE0, 0xF0, 0xF0, 0xF0,
  0xF0, 0x78, 0x38, 0x3C, 0x1C, 0x1F, 0x0F, 0x07, 0x03, 0x03, 0x01, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0xFF, 0x00, 0x00, 0x04, 0x04, 0x07, 0x84, 0x44, 0x40, 0x80, 0x40, 0x40, 0x80, 0x00,
  0x00, 0x01, 0x02, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x0F, 0x0F, 0x0F, 0x0F,
  0x0F, 0x07, 0x07, 0x07, 0x1F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x1F, 0x0F, 0x1F, 0x1F, 0x1F, 0x1F,
  0x1F, 0x1F, 0x1E, 0x0E, 0x04, 0x00, 0x00, 0x00, 0x0F, 0x05, 0x0B, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x84, 0x88, 0x84, 0x02, 0x01, 0x00,
  0x00, 0x80, 0x00, 0x00, 0x01, 0x82, 0x84, 0x84, 0x84, 0x04, 0x04, 0x84, 0x04, 0x04,
  0x84, 0x08, 0x10, 0xE0, 0x00, 0x01, 0x07, 0x1F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0xFF, 0xFF, 0x1F, 0x07, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x0F, 0x10, 0x20, 0x40, 0x80, 0x80, 0x80, 0x80, 0x88, 0x88, 0x8A, 0x85, 0x80, 0x80,
  0x89, 0x8F, 0x88, 0x80, 0x80, 0x83, 0x82, 0x82, 0x8F, 0x80, 0x80, 0x8F, 0x82, 0x85,
  0x88, 0x80, 0x80, 0x8F, 0x50, 0x20, 0x00, 0x3C, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF,
  0xFF, 0xFF, 0x7F, 0x3F, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

int main(void){
  unsigned short count = 0;
  PLL_Init();                           // set system clock to 50 MHz
  Nokia5110_Init();
  for(count=0; count<5; count=count+1){
    Nokia5110_DrawFullImage(Longhorn);
    Delay(16666667);                    // delay ~1 sec at 50 MHz
    Nokia5110_DrawFullImage(Longhorn2);
    Delay(16666667);                    // delay ~1 sec at 50 MHz
  }
  count = 0;
  Nokia5110_Clear();
  Nokia5110_OutString("************* LCD Test *************Letter: Num:------- ---- ");
  Nokia5110_OutChar(127);               // print UT sign
  while(1){
    Nokia5110_SetCursor(5, 5);          // five leading spaces, bottom row
    Nokia5110_OutChar((count%26)+'A');
    Nokia5110_OutChar(' ');
    Nokia5110_OutUDec(count);
    Delay(8333333);                     // delay ~0.5 sec at 50 MHz
    count = count + 1;
  }
}


PLL.h - для таймера.
// PLL.h
// Runs on LM4F120/TM4C123
// A software function to change the bus frequency using the PLL.
// Daniel Valvano
// September 10, 2013

/* This example accompanies the book
   "Embedded Systems: Real Time Interfacing to Arm Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013
   Program 2.10, Figure 2.37

 Copyright 2013 by Jonathan W. Valvano, valvano@mail.utexas.edu
    You may use, edit, run or distribute this file
    as long as the above copyright notice remains
 THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 For more information about my classes, my research, and my books, see
 http://users.ece.utexas.edu/~valvano/
 */

// The #define statement SYSDIV2 initializes
// the PLL to the desired frequency.
#define SYSDIV2 7
// bus frequency is 400MHz/(SYSDIV2+1) = 400MHz/(7+1) = 50 MHz

// configure the system to get its clock from the PLL
void PLL_Init(void);


/*
SYSDIV2  Divisor  Clock (MHz)
 0        1       reserved
 1        2       reserved
 2        3       reserved
 3        4       reserved
 4        5       80.000
 5        6       66.667
 6        7       reserved
 7        8       50.000
 8        9       44.444
 9        10      40.000
 10       11      36.364
 11       12      33.333
 12       13      30.769
 13       14      28.571
 14       15      26.667
 15       16      25.000
 16       17      23.529
 17       18      22.222
 18       19      21.053
 19       20      20.000
 20       21      19.048
 21       22      18.182
 22       23      17.391
 23       24      16.667
 24       25      16.000
 25       26      15.385
 26       27      14.815
 27       28      14.286
 28       29      13.793
 29       30      13.333
 30       31      12.903
 31       32      12.500
 32       33      12.121
 33       34      11.765
 34       35      11.429
 35       36      11.111
 36       37      10.811
 37       38      10.526
 38       39      10.256
 39       40      10.000
 40       41      9.756
 41       42      9.524
 42       43      9.302
 43       44      9.091
 44       45      8.889
 45       46      8.696
 46       47      8.511
 47       48      8.333
 48       49      8.163
 49       50      8.000
 50       51      7.843
 51       52      7.692
 52       53      7.547
 53       54      7.407
 54       55      7.273
 55       56      7.143
 56       57      7.018
 57       58      6.897
 58       59      6.780
 59       60      6.667
 60       61      6.557
 61       62      6.452
 62       63      6.349
 63       64      6.250
 64       65      6.154
 65       66      6.061
 66       67      5.970
 67       68      5.882
 68       69      5.797
 69       70      5.714
 70       71      5.634
 71       72      5.556
 72       73      5.479
 73       74      5.405
 74       75      5.333
 75       76      5.263
 76       77      5.195
 77       78      5.128
 78       79      5.063
 79       80      5.000
 80       81      4.938
 81       82      4.878
 82       83      4.819
 83       84      4.762
 84       85      4.706
 85       86      4.651
 86       87      4.598
 87       88      4.545
 88       89      4.494
 89       90      4.444
 90       91      4.396
 91       92      4.348
 92       93      4.301
 93       94      4.255
 94       95      4.211
 95       96      4.167
 96       97      4.124
 97       98      4.082
 98       99      4.040
 99       100     4.000
 100      101     3.960
 101      102     3.922
 102      103     3.883
 103      104     3.846
 104      105     3.810
 105      106     3.774
 106      107     3.738
 107      108     3.704
 108      109     3.670
 109      110     3.636
 110      111     3.604
 111      112     3.571
 112      113     3.540
 113      114     3.509
 114      115     3.478
 115      116     3.448
 116      117     3.419
 117      118     3.390
 118      119     3.361
 119      120     3.333
 120      121     3.306
 121      122     3.279
 122      123     3.252
 123      124     3.226
 124      125     3.200
 125      126     3.175
 126      127     3.150
 127      128     3.125
*/


PLL.c
// PLL.c
// Runs on LM4F120/TM4C123
// A software function to change the bus frequency using the PLL.
// Daniel Valvano
// September 10, 2013

/* This example accompanies the book
   "Embedded Systems: Real Time Interfacing to Arm Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013
   Program 2.10, Figure 2.37

 Copyright 2013 by Jonathan W. Valvano, valvano@mail.utexas.edu
    You may use, edit, run or distribute this file
    as long as the above copyright notice remains
 THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 For more information about my classes, my research, and my books, see
 http://users.ece.utexas.edu/~valvano/
 */
 
#include "PLL.h"

// The #define statement SYSDIV2 in PLL.h
// initializes the PLL to the desired frequency.

// bus frequency is 400MHz/(SYSDIV2+1) = 400MHz/(7+1) = 50 MHz
// see the table at the end of this file

#define SYSCTL_RIS_R            (*((volatile unsigned long *)0x400FE050))
#define SYSCTL_RIS_PLLLRIS      0x00000040  // PLL Lock Raw Interrupt Status
#define SYSCTL_RCC_R            (*((volatile unsigned long *)0x400FE060))
#define SYSCTL_RCC_XTAL_M       0x000007C0  // Crystal Value
#define SYSCTL_RCC_XTAL_6MHZ    0x000002C0  // 6 MHz Crystal
#define SYSCTL_RCC_XTAL_8MHZ    0x00000380  // 8 MHz Crystal
#define SYSCTL_RCC_XTAL_16MHZ   0x00000540  // 16 MHz Crystal
#define SYSCTL_RCC2_R           (*((volatile unsigned long *)0x400FE070))
#define SYSCTL_RCC2_USERCC2     0x80000000  // Use RCC2
#define SYSCTL_RCC2_DIV400      0x40000000  // Divide PLL as 400 MHz vs. 200
                                            // MHz
#define SYSCTL_RCC2_SYSDIV2_M   0x1F800000  // System Clock Divisor 2
#define SYSCTL_RCC2_SYSDIV2LSB  0x00400000  // Additional LSB for SYSDIV2
#define SYSCTL_RCC2_PWRDN2      0x00002000  // Power-Down PLL 2
#define SYSCTL_RCC2_BYPASS2     0x00000800  // PLL Bypass 2
#define SYSCTL_RCC2_OSCSRC2_M   0x00000070  // Oscillator Source 2
#define SYSCTL_RCC2_OSCSRC2_MO  0x00000000  // MOSC

// configure the system to get its clock from the PLL
void PLL_Init(void){
  // 0) configure the system to use RCC2 for advanced features
  //    such as 400 MHz PLL and non-integer System Clock Divisor
  SYSCTL_RCC2_R |= SYSCTL_RCC2_USERCC2;
  // 1) bypass PLL while initializing
  SYSCTL_RCC2_R |= SYSCTL_RCC2_BYPASS2;
  // 2) select the crystal value and oscillator source
  SYSCTL_RCC_R &= ~SYSCTL_RCC_XTAL_M;   // clear XTAL field
  SYSCTL_RCC_R += SYSCTL_RCC_XTAL_16MHZ;// configure for 16 MHz crystal
  SYSCTL_RCC2_R &= ~SYSCTL_RCC2_OSCSRC2_M;// clear oscillator source field
  SYSCTL_RCC2_R += SYSCTL_RCC2_OSCSRC2_MO;// configure for main oscillator source
  // 3) activate PLL by clearing PWRDN
  SYSCTL_RCC2_R &= ~SYSCTL_RCC2_PWRDN2;
  // 4) set the desired system divider and the system divider least significant bit
  SYSCTL_RCC2_R |= SYSCTL_RCC2_DIV400;  // use 400 MHz PLL
  SYSCTL_RCC2_R = (SYSCTL_RCC2_R&~0x1FC00000) // clear system clock divider field
                  + (SYSDIV2<<22);      // configure for 80 MHz clock
  // 5) wait for the PLL to lock by polling PLLLRIS
  while((SYSCTL_RIS_R&SYSCTL_RIS_PLLLRIS)==0){};
  // 6) enable use of PLL by clearing BYPASS
  SYSCTL_RCC2_R &= ~SYSCTL_RCC2_BYPASS2;
}


/*
SYSDIV2  Divisor  Clock (MHz)
 0        1       reserved
 1        2       reserved
 2        3       reserved
 3        4       reserved
 4        5       80.000
 5        6       66.667
 6        7       reserved
 7        8       50.000
 8        9       44.444
 9        10      40.000
 10       11      36.364
 11       12      33.333
 12       13      30.769
 13       14      28.571
 14       15      26.667
 15       16      25.000
 16       17      23.529
 17       18      22.222
 18       19      21.053
 19       20      20.000
 20       21      19.048
 21       22      18.182
 22       23      17.391
 23       24      16.667
 24       25      16.000
 25       26      15.385
 26       27      14.815
 27       28      14.286
 28       29      13.793
 29       30      13.333
 30       31      12.903
 31       32      12.500
 32       33      12.121
 33       34      11.765
 34       35      11.429
 35       36      11.111
 36       37      10.811
 37       38      10.526
 38       39      10.256
 39       40      10.000
 40       41      9.756
 41       42      9.524
 42       43      9.302
 43       44      9.091
 44       45      8.889
 45       46      8.696
 46       47      8.511
 47       48      8.333
 48       49      8.163
 49       50      8.000
 50       51      7.843
 51       52      7.692
 52       53      7.547
 53       54      7.407
 54       55      7.273
 55       56      7.143
 56       57      7.018
 57       58      6.897
 58       59      6.780
 59       60      6.667
 60       61      6.557
 61       62      6.452
 62       63      6.349
 63       64      6.250
 64       65      6.154
 65       66      6.061
 66       67      5.970
 67       68      5.882
 68       69      5.797
 69       70      5.714
 70       71      5.634
 71       72      5.556
 72       73      5.479
 73       74      5.405
 74       75      5.333
 75       76      5.263
 76       77      5.195
 77       78      5.128
 78       79      5.063
 79       80      5.000
 80       81      4.938
 81       82      4.878
 82       83      4.819
 83       84      4.762
 84       85      4.706
 85       86      4.651
 86       87      4.598
 87       88      4.545
 88       89      4.494
 89       90      4.444
 90       91      4.396
 91       92      4.348
 92       93      4.301
 93       94      4.255
 94       95      4.211
 95       96      4.167
 96       97      4.124
 97       98      4.082
 98       99      4.040
 99       100     4.000
 100      101     3.960
 101      102     3.922
 102      103     3.883
 103      104     3.846
 104      105     3.810
 105      106     3.774
 106      107     3.738
 107      108     3.704
 108      109     3.670
 109      110     3.636
 110      111     3.604
 111      112     3.571
 112      113     3.540
 113      114     3.509
 114      115     3.478
 115      116     3.448
 116      117     3.419
 117      118     3.390
 118      119     3.361
 119      120     3.333
 120      121     3.306
 121      122     3.279
 122      123     3.252
 123      124     3.226
 124      125     3.200
 125      126     3.175
 126      127     3.150
 127      128     3.125
*/


А вот и библиотека для работы с дисплеем, Nokia5110.h
// Nokia5110.h
// Runs on LM4F120/TM4C123
// Use SSI0 to send an 8-bit code to the Nokia5110 48x84
// pixel LCD to display text, images, or other information.
// Daniel Valvano
// September 16, 2013

// Font table, initialization, and other functions based
// off of Nokia_5110_Example from Spark Fun:
// 7-17-2011
// Spark Fun Electronics 2011
// Nathan Seidle
// http://dlnmh9ip6v2uc.cloudfront.net/datasheets/LCD/Monochrome/Nokia_5110_Example.pde

/* This example accompanies the book
   "Embedded Systems: Real Time Interfacing to Arm Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013

 Copyright 2013 by Jonathan W. Valvano, valvano@mail.utexas.edu
    You may use, edit, run or distribute this file
    as long as the above copyright notice remains
 THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 For more information about my classes, my research, and my books, see
 http://users.ece.utexas.edu/~valvano/
 */

// Blue Nokia 5110
// ---------------
// Signal        (Nokia 5110) LaunchPad pin
// Reset         (RST, pin 1) connected to PA7
// SSI0Fss       (CE,  pin 2) connected to PA3
// Data/Command  (DC,  pin 3) connected to PA6
// SSI0Tx        (Din, pin 4) connected to PA5
// SSI0Clk       (Clk, pin 5) connected to PA2
// 3.3V          (Vcc, pin 6) power
// back light    (BL,  pin 7) not connected
// Ground        (Gnd, pin 8) ground

// Red SparkFun Nokia 5110 (LCD-10168)
// -----------------------------------
// Signal        (Nokia 5110) LaunchPad pin
// 3.3V          (VCC, pin 1) power
// Ground        (GND, pin 2) ground
// SSI0Fss       (SCE, pin 3) connected to PA3
// Reset         (RST, pin 4) connected to PA7
// Data/Command  (D/C, pin 5) connected to PA6
// SSI0Tx        (DN,  pin 6) connected to PA5
// SSI0Clk       (SCLK, pin 7) connected to PA2
// back light    (LED, pin 8) not connected

// Maximum dimensions of the LCD, although the pixels are
// numbered from zero to (MAX-1).  Address may automatically
// be incremented after each transmission.
#define MAX_X                   84
#define MAX_Y                   48

// Contrast value 0xB1 looks good on red SparkFun
// and 0xB8 looks good on blue Nokia 5110.
// Adjust this from 0xA0 (lighter) to 0xCF (darker) for your display.
#define CONTRAST                0xB1

// This table contains the hex values that represent pixels
// for a font that is 5 pixels wide and 8 pixels high
static const char ASCII[][5] = {
  {0x00, 0x00, 0x00, 0x00, 0x00} // 20
  ,{0x00, 0x00, 0x5f, 0x00, 0x00} // 21 !
  ,{0x00, 0x07, 0x00, 0x07, 0x00} // 22 "
  ,{0x14, 0x7f, 0x14, 0x7f, 0x14} // 23 #
  ,{0x24, 0x2a, 0x7f, 0x2a, 0x12} // 24 $
  ,{0x23, 0x13, 0x08, 0x64, 0x62} // 25 %
  ,{0x36, 0x49, 0x55, 0x22, 0x50} // 26 &
  ,{0x00, 0x05, 0x03, 0x00, 0x00} // 27 '
  ,{0x00, 0x1c, 0x22, 0x41, 0x00} // 28 (
  ,{0x00, 0x41, 0x22, 0x1c, 0x00} // 29 )
  ,{0x14, 0x08, 0x3e, 0x08, 0x14} // 2a *
  ,{0x08, 0x08, 0x3e, 0x08, 0x08} // 2b +
  ,{0x00, 0x50, 0x30, 0x00, 0x00} // 2c ,
  ,{0x08, 0x08, 0x08, 0x08, 0x08} // 2d -
  ,{0x00, 0x60, 0x60, 0x00, 0x00} // 2e .
  ,{0x20, 0x10, 0x08, 0x04, 0x02} // 2f /
  ,{0x3e, 0x51, 0x49, 0x45, 0x3e} // 30 0
  ,{0x00, 0x42, 0x7f, 0x40, 0x00} // 31 1
  ,{0x42, 0x61, 0x51, 0x49, 0x46} // 32 2
  ,{0x21, 0x41, 0x45, 0x4b, 0x31} // 33 3
  ,{0x18, 0x14, 0x12, 0x7f, 0x10} // 34 4
  ,{0x27, 0x45, 0x45, 0x45, 0x39} // 35 5
  ,{0x3c, 0x4a, 0x49, 0x49, 0x30} // 36 6
  ,{0x01, 0x71, 0x09, 0x05, 0x03} // 37 7
  ,{0x36, 0x49, 0x49, 0x49, 0x36} // 38 8
  ,{0x06, 0x49, 0x49, 0x29, 0x1e} // 39 9
  ,{0x00, 0x36, 0x36, 0x00, 0x00} // 3a :
  ,{0x00, 0x56, 0x36, 0x00, 0x00} // 3b ;
  ,{0x08, 0x14, 0x22, 0x41, 0x00} // 3c <
  ,{0x14, 0x14, 0x14, 0x14, 0x14} // 3d =
  ,{0x00, 0x41, 0x22, 0x14, 0x08} // 3e >
  ,{0x02, 0x01, 0x51, 0x09, 0x06} // 3f ?
  ,{0x32, 0x49, 0x79, 0x41, 0x3e} // 40 @
  ,{0x7e, 0x11, 0x11, 0x11, 0x7e} // 41 A
  ,{0x7f, 0x49, 0x49, 0x49, 0x36} // 42 B
  ,{0x3e, 0x41, 0x41, 0x41, 0x22} // 43 C
  ,{0x7f, 0x41, 0x41, 0x22, 0x1c} // 44 D
  ,{0x7f, 0x49, 0x49, 0x49, 0x41} // 45 E
  ,{0x7f, 0x09, 0x09, 0x09, 0x01} // 46 F
  ,{0x3e, 0x41, 0x49, 0x49, 0x7a} // 47 G
  ,{0x7f, 0x08, 0x08, 0x08, 0x7f} // 48 H
  ,{0x00, 0x41, 0x7f, 0x41, 0x00} // 49 I
  ,{0x20, 0x40, 0x41, 0x3f, 0x01} // 4a J
  ,{0x7f, 0x08, 0x14, 0x22, 0x41} // 4b K
  ,{0x7f, 0x40, 0x40, 0x40, 0x40} // 4c L
  ,{0x7f, 0x02, 0x0c, 0x02, 0x7f} // 4d M
  ,{0x7f, 0x04, 0x08, 0x10, 0x7f} // 4e N
  ,{0x3e, 0x41, 0x41, 0x41, 0x3e} // 4f O
  ,{0x7f, 0x09, 0x09, 0x09, 0x06} // 50 P
  ,{0x3e, 0x41, 0x51, 0x21, 0x5e} // 51 Q
  ,{0x7f, 0x09, 0x19, 0x29, 0x46} // 52 R
  ,{0x46, 0x49, 0x49, 0x49, 0x31} // 53 S
  ,{0x01, 0x01, 0x7f, 0x01, 0x01} // 54 T
  ,{0x3f, 0x40, 0x40, 0x40, 0x3f} // 55 U
  ,{0x1f, 0x20, 0x40, 0x20, 0x1f} // 56 V
  ,{0x3f, 0x40, 0x38, 0x40, 0x3f} // 57 W
  ,{0x63, 0x14, 0x08, 0x14, 0x63} // 58 X
  ,{0x07, 0x08, 0x70, 0x08, 0x07} // 59 Y
  ,{0x61, 0x51, 0x49, 0x45, 0x43} // 5a Z
  ,{0x00, 0x7f, 0x41, 0x41, 0x00} // 5b [
  ,{0x02, 0x04, 0x08, 0x10, 0x20} // 5c '\'
  ,{0x00, 0x41, 0x41, 0x7f, 0x00} // 5d ]
  ,{0x04, 0x02, 0x01, 0x02, 0x04} // 5e ^
  ,{0x40, 0x40, 0x40, 0x40, 0x40} // 5f _
  ,{0x00, 0x01, 0x02, 0x04, 0x00} // 60 `
  ,{0x20, 0x54, 0x54, 0x54, 0x78} // 61 a
  ,{0x7f, 0x48, 0x44, 0x44, 0x38} // 62 b
  ,{0x38, 0x44, 0x44, 0x44, 0x20} // 63 c
  ,{0x38, 0x44, 0x44, 0x48, 0x7f} // 64 d
  ,{0x38, 0x54, 0x54, 0x54, 0x18} // 65 e
  ,{0x08, 0x7e, 0x09, 0x01, 0x02} // 66 f
  ,{0x0c, 0x52, 0x52, 0x52, 0x3e} // 67 g
  ,{0x7f, 0x08, 0x04, 0x04, 0x78} // 68 h
  ,{0x00, 0x44, 0x7d, 0x40, 0x00} // 69 i
  ,{0x20, 0x40, 0x44, 0x3d, 0x00} // 6a j
  ,{0x7f, 0x10, 0x28, 0x44, 0x00} // 6b k
  ,{0x00, 0x41, 0x7f, 0x40, 0x00} // 6c l
  ,{0x7c, 0x04, 0x18, 0x04, 0x78} // 6d m
  ,{0x7c, 0x08, 0x04, 0x04, 0x78} // 6e n
  ,{0x38, 0x44, 0x44, 0x44, 0x38} // 6f o
  ,{0x7c, 0x14, 0x14, 0x14, 0x08} // 70 p
  ,{0x08, 0x14, 0x14, 0x18, 0x7c} // 71 q
  ,{0x7c, 0x08, 0x04, 0x04, 0x08} // 72 r
  ,{0x48, 0x54, 0x54, 0x54, 0x20} // 73 s
  ,{0x04, 0x3f, 0x44, 0x40, 0x20} // 74 t
  ,{0x3c, 0x40, 0x40, 0x20, 0x7c} // 75 u
  ,{0x1c, 0x20, 0x40, 0x20, 0x1c} // 76 v
  ,{0x3c, 0x40, 0x30, 0x40, 0x3c} // 77 w
  ,{0x44, 0x28, 0x10, 0x28, 0x44} // 78 x
  ,{0x0c, 0x50, 0x50, 0x50, 0x3c} // 79 y
  ,{0x44, 0x64, 0x54, 0x4c, 0x44} // 7a z
  ,{0x00, 0x08, 0x36, 0x41, 0x00} // 7b {
  ,{0x00, 0x00, 0x7f, 0x00, 0x00} // 7c |
  ,{0x00, 0x41, 0x36, 0x08, 0x00} // 7d }
  ,{0x10, 0x08, 0x08, 0x10, 0x08} // 7e ~
//  ,{0x78, 0x46, 0x41, 0x46, 0x78} // 7f DEL
  ,{0x1f, 0x24, 0x7c, 0x24, 0x1f} // 7f UT sign
};

//********Nokia5110_Init*****************
// Initialize Nokia 5110 48x84 LCD by sending the proper
// commands to the PCD8544 driver.  One new feature of the
// LM4F120 is that its SSIs can get their baud clock from
// either the system clock or from the 16 MHz precision
// internal oscillator.  If the system clock is faster than
// 50 MHz, the SSI baud clock will be faster than the 4 MHz
// maximum of the Nokia 5110.
// inputs: none
// outputs: none
// assumes: system clock rate of 50 MHz or less
void Nokia5110_Init(void);

//********Nokia5110_OutChar*****************
// Print a character to the Nokia 5110 48x84 LCD.  The
// character will be printed at the current cursor position,
// the cursor will automatically be updated, and it will
// wrap to the next row or back to the top if necessary.
// One blank column of pixels will be printed on either side
// of the character for readability.  Since characters are 8
// pixels tall and 5 pixels wide, 12 characters fit per row,
// and there are six rows.
// inputs: data  character to print
// outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_OutChar(unsigned char data);

//********Nokia5110_OutString*****************
// Print a string of characters to the Nokia 5110 48x84 LCD.
// The string will automatically wrap, so padding spaces may
// be needed to make the output look optimal.
// inputs: ptr  pointer to NULL-terminated ASCII string
// outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_OutString(char *ptr);

//********Nokia5110_OutUDec*****************
// Output a 16-bit number in unsigned decimal format with a
// fixed size of five right-justified digits of output.
// Inputs: n  16-bit unsigned number
// Outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_OutUDec(unsigned short n);

//********Nokia5110_SetCursor*****************
// Move the cursor to the desired X- and Y-position.  The
// next character will be printed here.  X=0 is the leftmost
// column.  Y=0 is the top row.
// inputs: newX  new X-position of the cursor (0<=newX<=11)
//         newY  new Y-position of the cursor (0<=newY<=5)
// outputs: none
void Nokia5110_SetCursor(unsigned char newX, unsigned char newY);

//********Nokia5110_Clear*****************
// Clear the LCD by writing zeros to the entire screen and
// reset the cursor to (0,0) (top left corner of screen).
// inputs: none
// outputs: none
void Nokia5110_Clear(void);

//********Nokia5110_DrawFullImage*****************
// Fill the whole screen by drawing a 48x84 bitmap image.
// inputs: ptr  pointer to 504 byte bitmap
// outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_DrawFullImage(const char *ptr);


И, самое главное, Nokia5110.c
// Nokia5110.c
// Runs on LM4F120/TM4C123
// Use SSI0 to send an 8-bit code to the Nokia5110 48x84
// pixel LCD to display text, images, or other information.
// Daniel Valvano
// September 16, 2013

// Font table, initialization, and other functions based
// off of Nokia_5110_Example from Spark Fun:
// 7-17-2011
// Spark Fun Electronics 2011
// Nathan Seidle
// http://dlnmh9ip6v2uc.cloudfront.net/datasheets/LCD/Monochrome/Nokia_5110_Example.pde

/* This example accompanies the book
   "Embedded Systems: Real Time Interfacing to Arm Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013

 Copyright 2013 by Jonathan W. Valvano, valvano@mail.utexas.edu
    You may use, edit, run or distribute this file
    as long as the above copyright notice remains
 THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 For more information about my classes, my research, and my books, see
 http://users.ece.utexas.edu/~valvano/
 */

// Blue Nokia 5110
// ---------------
// Signal        (Nokia 5110) LaunchPad pin
// Reset         (RST, pin 1) connected to PA7
// SSI0Fss       (CE,  pin 2) connected to PA3
// Data/Command  (DC,  pin 3) connected to PA6
// SSI0Tx        (Din, pin 4) connected to PA5
// SSI0Clk       (Clk, pin 5) connected to PA2
// 3.3V          (Vcc, pin 6) power
// back light    (BL,  pin 7) not connected, consists of 4 white LEDs which draw ~80mA total
// Ground        (Gnd, pin 8) ground

// Red SparkFun Nokia 5110 (LCD-10168)
// -----------------------------------
// Signal        (Nokia 5110) LaunchPad pin
// 3.3V          (VCC, pin 1) power
// Ground        (GND, pin 2) ground
// SSI0Fss       (SCE, pin 3) connected to PA3
// Reset         (RST, pin 4) connected to PA7
// Data/Command  (D/C, pin 5) connected to PA6
// SSI0Tx        (DN,  pin 6) connected to PA5
// SSI0Clk       (SCLK, pin 7) connected to PA2
// back light    (LED, pin 8) not connected, consists of 4 white LEDs which draw ~80mA total

#include "Nokia5110.h"

#define DC                      (*((volatile unsigned long *)0x40004100))
#define DC_COMMAND              0
#define DC_DATA                 0x40
#define RESET                   (*((volatile unsigned long *)0x40004200))
#define RESET_LOW               0
#define RESET_HIGH              0x80
#define GPIO_PORTA_DIR_R        (*((volatile unsigned long *)0x40004400))
#define GPIO_PORTA_AFSEL_R      (*((volatile unsigned long *)0x40004420))
#define GPIO_PORTA_DEN_R        (*((volatile unsigned long *)0x4000451C))
#define GPIO_PORTA_AMSEL_R      (*((volatile unsigned long *)0x40004528))
#define GPIO_PORTA_PCTL_R       (*((volatile unsigned long *)0x4000452C))
#define SSI0_CR0_R              (*((volatile unsigned long *)0x40008000))
#define SSI0_CR1_R              (*((volatile unsigned long *)0x40008004))
#define SSI0_DR_R               (*((volatile unsigned long *)0x40008008))
#define SSI0_SR_R               (*((volatile unsigned long *)0x4000800C))
#define SSI0_CPSR_R             (*((volatile unsigned long *)0x40008010))
#define SSI0_CC_R               (*((volatile unsigned long *)0x40008FC8))
#define SSI_CR0_SCR_M           0x0000FF00  // SSI Serial Clock Rate
#define SSI_CR0_SPH             0x00000080  // SSI Serial Clock Phase
#define SSI_CR0_SPO             0x00000040  // SSI Serial Clock Polarity
#define SSI_CR0_FRF_M           0x00000030  // SSI Frame Format Select
#define SSI_CR0_FRF_MOTO        0x00000000  // Freescale SPI Frame Format
#define SSI_CR0_DSS_M           0x0000000F  // SSI Data Size Select
#define SSI_CR0_DSS_8           0x00000007  // 8-bit data
#define SSI_CR1_MS              0x00000004  // SSI Master/Slave Select
#define SSI_CR1_SSE             0x00000002  // SSI Synchronous Serial Port
                                            // Enable
#define SSI_SR_BSY              0x00000010  // SSI Busy Bit
#define SSI_SR_TNF              0x00000002  // SSI Transmit FIFO Not Full
#define SSI_CPSR_CPSDVSR_M      0x000000FF  // SSI Clock Prescale Divisor
#define SSI_CC_CS_M             0x0000000F  // SSI Baud Clock Source
#define SSI_CC_CS_SYSPLL        0x00000000  // Either the system clock (if the
                                            // PLL bypass is in effect) or the
                                            // PLL output (default)
#define SYSCTL_RCGC1_R          (*((volatile unsigned long *)0x400FE104))
#define SYSCTL_RCGC2_R          (*((volatile unsigned long *)0x400FE108))
#define SYSCTL_RCGC1_SSI0       0x00000010  // SSI0 Clock Gating Control
#define SYSCTL_RCGC2_GPIOA      0x00000001  // port A Clock Gating Control

enum typeOfWrite{
  COMMAND,                              // the transmission is an LCD command
  DATA                                  // the transmission is data
};
// The Data/Command pin must be valid when the eighth bit is
// sent.  The SSI module has hardware input and output FIFOs
// that are 8 locations deep.  Based on the observation that
// the LCD interface tends to send a few commands and then a
// lot of data, the FIFOs are not used when writing
// commands, and they are used when writing data.  This
// ensures that the Data/Command pin status matches the byte
// that is actually being transmitted.
// The write command operation waits until all data has been
// sent, configures the Data/Command pin for commands, sends
// the command, and then waits for the transmission to
// finish.
// The write data operation waits until there is room in the
// transmit FIFO, configures the Data/Command pin for data,
// and then adds the data to the transmit FIFO.

// This is a helper function that sends an 8-bit message to the LCD.
// inputs: type     COMMAND or DATA
//         message  8-bit code to transmit
// outputs: none
// assumes: SSI0 and port A have already been initialized and enabled
void static lcdwrite(enum typeOfWrite type, char message){
  if(type == COMMAND){
                                        // wait until SSI0 not busy/transmit FIFO empty
    while((SSI0_SR_R&SSI_SR_BSY)==SSI_SR_BSY){};
    DC = DC_COMMAND;
    SSI0_DR_R = message;                // command out
                                        // wait until SSI0 not busy/transmit FIFO empty
    while((SSI0_SR_R&SSI_SR_BSY)==SSI_SR_BSY){};
  } else{
    while((SSI0_SR_R&SSI_SR_TNF)==0){}; // wait until transmit FIFO not full
    DC = DC_DATA;
    SSI0_DR_R = message;                // data out
  }
}

//********Nokia5110_Init*****************
// Initialize Nokia 5110 48x84 LCD by sending the proper
// commands to the PCD8544 driver.  One new feature of the
// LM4F120 is that its SSIs can get their baud clock from
// either the system clock or from the 16 MHz precision
// internal oscillator.  If the system clock is faster than
// 50 MHz, the SSI baud clock will be faster than the 4 MHz
// maximum of the Nokia 5110.
// inputs: none
// outputs: none
// assumes: system clock rate of 50 MHz or less
void Nokia5110_Init(void){
  volatile unsigned long delay;
  SYSCTL_RCGC1_R |= SYSCTL_RCGC1_SSI0;  // activate SSI0
  SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOA; // activate port A
  delay = SYSCTL_RCGC2_R;               // allow time to finish activating
  GPIO_PORTA_DIR_R |= 0xC0;             // make PA6,7 out
  GPIO_PORTA_AFSEL_R |= 0x2C;           // enable alt funct on PA2,3,5
  GPIO_PORTA_AFSEL_R &= ~0xC0;          // disable alt funct on PA6,7
  GPIO_PORTA_DEN_R |= 0xEC;             // enable digital I/O on PA2,3,5,6,7
                                        // configure PA2,3,5 as SSI
  GPIO_PORTA_PCTL_R = (GPIO_PORTA_PCTL_R&0xFF0F00FF)+0x00202200;
                                        // configure PA6,7 as GPIO
  GPIO_PORTA_PCTL_R = (GPIO_PORTA_PCTL_R&0x00FFFFFF)+0x00000000;
  GPIO_PORTA_AMSEL_R &= ~0xEC;          // disable analog functionality on PA2,3,5,6,7
  SSI0_CR1_R &= ~SSI_CR1_SSE;           // disable SSI
  SSI0_CR1_R &= ~SSI_CR1_MS;            // master mode
                                        // configure for system clock/PLL baud clock source
  SSI0_CC_R = (SSI0_CC_R&~SSI_CC_CS_M)+SSI_CC_CS_SYSPLL;
                                        // clock divider for 3.125 MHz SSIClk (50 MHz PIOSC/16)
  SSI0_CPSR_R = (SSI0_CPSR_R&~SSI_CPSR_CPSDVSR_M)+16;
  SSI0_CR0_R &= ~(SSI_CR0_SCR_M |       // SCR = 0 (3.125 Mbps data rate)
                  SSI_CR0_SPH |         // SPH = 0
                  SSI_CR0_SPO);         // SPO = 0
                                        // FRF = Freescale format
  SSI0_CR0_R = (SSI0_CR0_R&~SSI_CR0_FRF_M)+SSI_CR0_FRF_MOTO;
                                        // DSS = 8-bit data
  SSI0_CR0_R = (SSI0_CR0_R&~SSI_CR0_DSS_M)+SSI_CR0_DSS_8;
  SSI0_CR1_R |= SSI_CR1_SSE;            // enable SSI

  RESET = RESET_LOW;                    // reset the LCD to a known state
  for(delay=0; delay<10; delay=delay+1);// delay minimum 100 ns
  RESET = RESET_HIGH;                   // negative logic

  lcdwrite(COMMAND, 0x21);              // chip active; horizontal addressing mode (V = 0); use extended instruction set (H = 1)
                                        // set LCD Vop (contrast), which may require some tweaking:
  lcdwrite(COMMAND, CONTRAST);          // try 0xB1 (for 3.3V red SparkFun), 0xB8 (for 3.3V blue SparkFun), 0xBF if your display is too dark, or 0x80 to 0xFF if experimenting
  lcdwrite(COMMAND, 0x04);              // set temp coefficient
  lcdwrite(COMMAND, 0x14);              // LCD bias mode 1:48: try 0x13 or 0x14

  lcdwrite(COMMAND, 0x20);              // we must send 0x20 before modifying the display control mode
  lcdwrite(COMMAND, 0x0C);              // set display control to normal mode: 0x0D for inverse
}

//********Nokia5110_OutChar*****************
// Print a character to the Nokia 5110 48x84 LCD.  The
// character will be printed at the current cursor position,
// the cursor will automatically be updated, and it will
// wrap to the next row or back to the top if necessary.
// One blank column of pixels will be printed on either side
// of the character for readability.  Since characters are 8
// pixels tall and 5 pixels wide, 12 characters fit per row,
// and there are six rows.
// inputs: data  character to print
// outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_OutChar(unsigned char data){
  int i;
  lcdwrite(DATA, 0x00);                 // blank vertical line padding
  for(i=0; i<5; i=i+1){
    lcdwrite(DATA, ASCII[data - 0x20][i]);
  }
  lcdwrite(DATA, 0x00);                 // blank vertical line padding
}

//********Nokia5110_OutString*****************
// Print a string of characters to the Nokia 5110 48x84 LCD.
// The string will automatically wrap, so padding spaces may
// be needed to make the output look optimal.
// inputs: ptr  pointer to NULL-terminated ASCII string
// outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_OutString(char *ptr){
  while(*ptr){
    Nokia5110_OutChar((unsigned char)*ptr);
    ptr = ptr + 1;
  }
}

//********Nokia5110_OutUDec*****************
// Output a 16-bit number in unsigned decimal format with a
// fixed size of five right-justified digits of output.
// Inputs: n  16-bit unsigned number
// Outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_OutUDec(unsigned short n){
  if(n < 10){
    Nokia5110_OutString("    ");
    Nokia5110_OutChar(n+'0'); /* n is between 0 and 9 */
  } else if(n<100){
    Nokia5110_OutString("   ");
    Nokia5110_OutChar(n/10+'0'); /* tens digit */
    Nokia5110_OutChar(n%10+'0'); /* ones digit */
  } else if(n<1000){
    Nokia5110_OutString("  ");
    Nokia5110_OutChar(n/100+'0'); /* hundreds digit */
    n = n%100;
    Nokia5110_OutChar(n/10+'0'); /* tens digit */
    Nokia5110_OutChar(n%10+'0'); /* ones digit */
  }
  else if(n<10000){
    Nokia5110_OutChar(' ');
    Nokia5110_OutChar(n/1000+'0'); /* thousands digit */
    n = n%1000;
    Nokia5110_OutChar(n/100+'0'); /* hundreds digit */
    n = n%100;
    Nokia5110_OutChar(n/10+'0'); /* tens digit */
    Nokia5110_OutChar(n%10+'0'); /* ones digit */
  }
  else {
    Nokia5110_OutChar(n/10000+'0'); /* ten-thousands digit */
    n = n%10000;
    Nokia5110_OutChar(n/1000+'0'); /* thousands digit */
    n = n%1000;
    Nokia5110_OutChar(n/100+'0'); /* hundreds digit */
    n = n%100;
    Nokia5110_OutChar(n/10+'0'); /* tens digit */
    Nokia5110_OutChar(n%10+'0'); /* ones digit */
  }
}

//********Nokia5110_SetCursor*****************
// Move the cursor to the desired X- and Y-position.  The
// next character will be printed here.  X=0 is the leftmost
// column.  Y=0 is the top row.
// inputs: newX  new X-position of the cursor (0<=newX<=11)
//         newY  new Y-position of the cursor (0<=newY<=5)
// outputs: none
void Nokia5110_SetCursor(unsigned char newX, unsigned char newY){
  if((newX > 11) || (newY > 5)){        // bad input
    return;                             // do nothing
  }
  // multiply newX by 7 because each character is 7 columns wide
  lcdwrite(COMMAND, 0x80|(newX*7));     // setting bit 7 updates X-position
  lcdwrite(COMMAND, 0x40|newY);         // setting bit 6 updates Y-position
}

//********Nokia5110_Clear*****************
// Clear the LCD by writing zeros to the entire screen and
// reset the cursor to (0,0) (top left corner of screen).
// inputs: none
// outputs: none
void Nokia5110_Clear(void){
  int i;
  for(i=0; i<(MAX_X*MAX_Y/8); i=i+1){
    lcdwrite(DATA, 0x00);
  }
  Nokia5110_SetCursor(0, 0);
}

//********Nokia5110_DrawFullImage*****************
// Fill the whole screen by drawing a 48x84 bitmap image.
// inputs: ptr  pointer to 504 byte bitmap
// outputs: none
// assumes: LCD is in default horizontal addressing mode (V = 0)
void Nokia5110_DrawFullImage(const char *ptr){
  int i;
  Nokia5110_SetCursor(0, 0);
  for(i=0; i<(MAX_X*MAX_Y/8); i=i+1){
    lcdwrite(DATA, ptr[i]);
  }
}


UPD: 
Схема подключения.
КонтроллерДисплей
PA2Clk
PA3CE
PA5Din
PA6DC
PA7RST
GndGnd
3.3 VVcc через резистор
3.3 V[BL через резистор!]