therm Changeset - a9e06183f42b · protofusion repositories

Changeset - a9e06183f42b

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Ethan Zonca - 10 years ago 2014-08-18 22:55:17
ez@ethanzonca.com

Hello world now rendered properly

4 files changed with 158 insertions and 618 deletions:

main.c

smallfonts.c

554

ssd1306.c

154

ssd1306.h

0 comments (0 inline, 0 general)

main.c

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@@ @@ -22,120 +22,98 @@ @@
 // USB Supporting Vars
 extern __IO uint8_t Receive_Buffer[64];
 extern __IO  uint32_t Receive_length ;
 extern __IO  uint32_t length ;
 uint8_t Send_Buffer[64];
 uint32_t packet_sent=1;
 uint32_t packet_receive=1;
 static __IO uint32_t TimingDelay;
 // Move to header file
 void init_gpio();
 void init_spi();
 void process();
 void machine();
 int main(void)
+{
     // Init clocks
     SystemInit();
     init_gpio();
     // Init USB
     //Set_USBClock();
     //USB_Interrupts_Config();
     //USB_Init();
     GPIO_SetBits(LED_POWER);
     RCC_ClocksTypeDef RCC_Clocks;
     // SysTick end of count event each 1ms
     RCC_GetClocksFreq(&RCC_Clocks);
     SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
     GPIO_ResetBits(LED_STAT);
     Delay(100);
     GPIO_SetBits(LED_POWER);
     Delay(500);
     GPIO_ResetBits(LED_POWER);
     init_spi();
     ssd1306_Init();
     ssd1306_DrawPoint(0,0,1);
     ssd1306_DrawPoint(0,1,1);
     ssd1306_DrawPoint(0,2,1);
     ssd1306_DrawPoint(0,3,1);
     ssd1306_DrawPoint(0,4,1);
     ssd1306_DrawPoint(0,5,1);
     ssd1306_DrawPoint(0,6,1);
     ssd1306_DrawPoint(1,3,1);
     ssd1306_DrawPoint(2,3,1);
     ssd1306_DrawPoint(3,3,1);
     ssd1306_DrawPoint(4,3,1);
     ssd1306_DrawPoint(5,0,1);
     ssd1306_DrawPoint(5,1,1);
     ssd1306_DrawPoint(5,2,1);
     ssd1306_DrawPoint(5,3,1);
     ssd1306_DrawPoint(5,4,1);
     ssd1306_DrawPoint(5,5,1);
     ssd1306_DrawPoint(5,6,1);
     ssd1306_block_write();
     ssd1306_DrawString("Hello World!", 0, 10);
   //  ssd1306_block_write();
     while(1)
+   {
         //ssd1306_block_write();
         // Process sensor inputs [TODO: 5hz?]
         process();
         // Run state machine [TODO: 50hz?]
         machine();
         // probably just passed the actual port
         // TODO: Grab buttonpresses with interrupts
         uint8_t sw_btn = GPIO_ReadInputDataBit(SW_BTN);
         uint8_t sw_up = GPIO_ReadInputDataBit(SW_UP);
         uint8_t sw_down = GPIO_ReadInputDataBit(SW_DOWN);
         uint8_t sw_left = GPIO_ReadInputDataBit(SW_LEFT);
         uint8_t sw_right = GPIO_ReadInputDataBit(SW_RIGHT);
         if(!sw_btn) {
             GPIO_ToggleBits(LED_STAT);
             ssd1306_block_write();
+        }
         GPIO_SetBits(LED_POWER);
         Delay(50);
         GPIO_ResetBits(LED_POWER);
         Delay(50);
+    }
+}
 int32_t temp = 0;
 int32_t setpoint = 0;
 int32_t p = 1;
 int32_t i = 1;
 int32_t d = 1;
 // Process things
 void process()
+{
     // Read MAX temp sensor
     GPIO_ResetBits(MAX_CS);
     // Assert CS
     // This may not clock at all... might need to send 16 bits first
     uint8_t retval = 0;//SPI_I2S_ReceiveData(SPI2);
     // Deassert CS

smallfonts.c

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deleted file

ssd1306.c

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 /*******************************************************************************
 * File Name          : ssd1306.c
 * Author             : lxyppc
 * Version            : V1.0
 * Date               : 10-01-21
 * Description        : ssd1306 operations
 *                      the SSH1101A is compatible with ssd1306
 *******************************************************************************/
 /* Includes ------------------------------------------------------------------*/
 #include "stm32l100c_discovery.h"
 #include "bsp.h"
 #include "ssd1306.h"
 #include "DrawText.h"
 #include "smallfonts.h"
 /* Private typedef -----------------------------------------------------------*/
 /* Private define ------------------------------------------------------------*/
 #define   SSD1306_PAGE_NUMBER           8
 #define   SSD1306_COLUMN_NUMBER         128
 #define   SSD1306_COLUMN_MARGIN_START   2
 #define   SSD1306_COLUMN_MARGIN_END     2
 #define   SSD1306_X_PIXEL   128
 #define   SSD1306_Y_PIXEL   32
 /* Private macro -------------------------------------------------------------*/
 #define   ssd1306_Buffer    (_SSD1306_Buffer + SSD1306_COLUMN_MARGIN_START)
 /* Private variables ---------------------------------------------------------*/
 static  uint8_t  _SSD1306_Buffer[SSD1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER + SSD1306_COLUMN_MARGIN_START + SSD1306_COLUMN_MARGIN_END] = {0};
 static  uint8_t  pageIndex = 0;
 static  uint8_t  iS_SSD_On = 0;
 static  uint8_t  pre_on = 0;
 static  uint8_t  curContrast = 0xCC;
 static  uint8_t  lastContrast = 0xCC;
 /* Private function prototypes -----------------------------------------------*/
 void  WriteCommand(unsigned char command);
 void  WriteData(unsigned char data);
 void  OnPageTransferDone(void);
 unsigned long ssd1306_OFF(void);
 unsigned long ssd1306_ON(void);
 unsigned char* ssd1306_GetBuffer()
+{
   return ssd1306_Buffer;
+}
 /*******************************************************************************
 * Function Name  : WriteCommand
 * Description    : Write command to the ssd1306
 * Input          : None
 * Output         : None
 * Return         : None
 *******************************************************************************/
 void WriteCommand(unsigned char command)
+{
   SSD_A0_Low();
   SPI_SendByte(command);
   SPI_Wait();
+}
 /*******************************************************************************
 * Function Name  : WriteData
 * Description    : Write data to the ssd1306
@@ @@ -555,101 +556,214 @@ unsigned long ssd1306_DrawPoint( @@
   return 0;
+}
 /*******************************************************************************
 * Function Name  : ssd1306_ReadPoint
 * Description    : Read a point from ssd1306
 * Input          : None
 * Output         : None
 * Return         : None
 *******************************************************************************/
 unsigned long ssd1306_ReadPoint(
   Pos_t x,
   Pos_t y)
+{
   unsigned char* pStart = ssd1306_Buffer + (y/8)*SSD1306_COLUMN_NUMBER + x;
   unsigned char mask = 1<<(y%8);
   return *pStart&mask ? 1 : 0;
+}
 /*******************************************************************************
 * Function Name  : ssd1306_ClearScreen
 * Description    : Clear the screen contents
 * Input          : None
 * Output         : None
 * Return         : None
 *******************************************************************************/
 void  ssd1306_FillScreen(Color_t color)
+{
   unsigned char mask = color ? 0xFF : 0;
   unsigned long i = 0;
   for(i=0;i<SSD1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER;i++){
     ssd1306_Buffer[i] = mask;
+  }
+}
 const DeviceProp  ssd1306_Prop =
+{
   .pfnDrawBlok = ssd1306_DrawBlock,
   .pfnDrawPoint = ssd1306_DrawPoint,
   .xPixel = 128,
   .yPixel = 64,
 };
 // FontData
 const char fontData[240][5] =
 {                                       // Refer to "Times New Roman" Font Database
                                         //   Basic Characters
     {0x00,0x00,0x00,0x00,0x00},         //   (  0)    - 0x0020 No-Break Space
     {0x00,0x00,0x4F,0x00,0x00},         //   (  1)  ! - 0x0021 Exclamation Mark
     {0x00,0x07,0x00,0x07,0x00},         //   (  2)  " - 0x0022 Quotation Mark
     {0x14,0x7F,0x14,0x7F,0x14},         //   (  3)  # - 0x0023 Number Sign
     {0x24,0x2A,0x7F,0x2A,0x12},         //   (  4)  $ - 0x0024 Dollar Sign
     {0x23,0x13,0x08,0x64,0x62},         //   (  5)  % - 0x0025 Percent Sign
     {0x36,0x49,0x55,0x22,0x50},         //   (  6)  & - 0x0026 Ampersand
     {0x00,0x05,0x03,0x00,0x00},         //   (  7)  ' - 0x0027 Apostrophe
     {0x00,0x1C,0x22,0x41,0x00},         //   (  8)  ( - 0x0028 Left Parenthesis
     {0x00,0x41,0x22,0x1C,0x00},         //   (  9)  ) - 0x0029 Right Parenthesis
     {0x14,0x08,0x3E,0x08,0x14},         //   ( 10)  * - 0x002A Asterisk
     {0x08,0x08,0x3E,0x08,0x08},         //   ( 11)  + - 0x002B Plus Sign
     {0x00,0x50,0x30,0x00,0x00},         //   ( 12)  , - 0x002C Comma
     {0x08,0x08,0x08,0x08,0x08},         //   ( 13)  - - 0x002D Hyphen-Minus
     {0x00,0x60,0x60,0x00,0x00},         //   ( 14)  . - 0x002E Full Stop
     {0x20,0x10,0x08,0x04,0x02},         //   ( 15)  / - 0x002F Solidus
     {0x3E,0x51,0x49,0x45,0x3E},         //   ( 16)  0 - 0x0030 Digit Zero
     {0x00,0x42,0x7F,0x40,0x00},         //   ( 17)  1 - 0x0031 Digit One
     {0x42,0x61,0x51,0x49,0x46},         //   ( 18)  2 - 0x0032 Digit Two
     {0x21,0x41,0x45,0x4B,0x31},         //   ( 19)  3 - 0x0033 Digit Three
     {0x18,0x14,0x12,0x7F,0x10},         //   ( 20)  4 - 0x0034 Digit Four
     {0x27,0x45,0x45,0x45,0x39},         //   ( 21)  5 - 0x0035 Digit Five
     {0x3C,0x4A,0x49,0x49,0x30},         //   ( 22)  6 - 0x0036 Digit Six
     {0x01,0x71,0x09,0x05,0x03},         //   ( 23)  7 - 0x0037 Digit Seven
     {0x36,0x49,0x49,0x49,0x36},         //   ( 24)  8 - 0x0038 Digit Eight
     {0x06,0x49,0x49,0x29,0x1E},         //   ( 25)  9 - 0x0039 Dight Nine
     {0x00,0x36,0x36,0x00,0x00},         //   ( 26)  : - 0x003A Colon
     {0x00,0x56,0x36,0x00,0x00},         //   ( 27)  ; - 0x003B Semicolon
     {0x08,0x14,0x22,0x41,0x00},         //   ( 28)  < - 0x003C Less-Than Sign
     {0x14,0x14,0x14,0x14,0x14},         //   ( 29)  = - 0x003D Equals Sign
     {0x00,0x41,0x22,0x14,0x08},         //   ( 30)  > - 0x003E Greater-Than Sign
     {0x02,0x01,0x51,0x09,0x06},         //   ( 31)  ? - 0x003F Question Mark
     {0x32,0x49,0x79,0x41,0x3E},         //   ( 32)  @ - 0x0040 Commercial At
     {0x7E,0x11,0x11,0x11,0x7E},         //   ( 33)  A - 0x0041 Latin Capital Letter A
     {0x7F,0x49,0x49,0x49,0x36},         //   ( 34)  B - 0x0042 Latin Capital Letter B
     {0x3E,0x41,0x41,0x41,0x22},         //   ( 35)  C - 0x0043 Latin Capital Letter C
     {0x7F,0x41,0x41,0x22,0x1C},         //   ( 36)  D - 0x0044 Latin Capital Letter D
     {0x7F,0x49,0x49,0x49,0x41},         //   ( 37)  E - 0x0045 Latin Capital Letter E
     {0x7F,0x09,0x09,0x09,0x01},         //   ( 38)  F - 0x0046 Latin Capital Letter F
     {0x3E,0x41,0x49,0x49,0x7A},         //   ( 39)  G - 0x0047 Latin Capital Letter G
     {0x7F,0x08,0x08,0x08,0x7F},         //   ( 40)  H - 0x0048 Latin Capital Letter H
     {0x00,0x41,0x7F,0x41,0x00},         //   ( 41)  I - 0x0049 Latin Capital Letter I
     {0x20,0x40,0x41,0x3F,0x01},         //   ( 42)  J - 0x004A Latin Capital Letter J
     {0x7F,0x08,0x14,0x22,0x41},         //   ( 43)  K - 0x004B Latin Capital Letter K
     {0x7F,0x40,0x40,0x40,0x40},         //   ( 44)  L - 0x004C Latin Capital Letter L
     {0x7F,0x02,0x0C,0x02,0x7F},         //   ( 45)  M - 0x004D Latin Capital Letter M
     {0x7F,0x04,0x08,0x10,0x7F},         //   ( 46)  N - 0x004E Latin Capital Letter N
     {0x3E,0x41,0x41,0x41,0x3E},         //   ( 47)  O - 0x004F Latin Capital Letter O
     {0x7F,0x09,0x09,0x09,0x06},         //   ( 48)  P - 0x0050 Latin Capital Letter P
     {0x3E,0x41,0x51,0x21,0x5E},         //   ( 49)  Q - 0x0051 Latin Capital Letter Q
     {0x7F,0x09,0x19,0x29,0x46},         //   ( 50)  R - 0x0052 Latin Capital Letter R
     {0x46,0x49,0x49,0x49,0x31},         //   ( 51)  S - 0x0053 Latin Capital Letter S
     {0x01,0x01,0x7F,0x01,0x01},         //   ( 52)  T - 0x0054 Latin Capital Letter T
     {0x3F,0x40,0x40,0x40,0x3F},         //   ( 53)  U - 0x0055 Latin Capital Letter U
     {0x1F,0x20,0x40,0x20,0x1F},         //   ( 54)  V - 0x0056 Latin Capital Letter V
     {0x3F,0x40,0x38,0x40,0x3F},         //   ( 55)  W - 0x0057 Latin Capital Letter W
     {0x63,0x14,0x08,0x14,0x63},         //   ( 56)  X - 0x0058 Latin Capital Letter X
     {0x07,0x08,0x70,0x08,0x07},         //   ( 57)  Y - 0x0059 Latin Capital Letter Y
     {0x61,0x51,0x49,0x45,0x43},         //   ( 58)  Z - 0x005A Latin Capital Letter Z
     {0x00,0x7F,0x41,0x41,0x00},         //   ( 59)  [ - 0x005B Left Square Bracket
     {0x02,0x04,0x08,0x10,0x20},         //   ( 60)  \ - 0x005C Reverse Solidus
     {0x00,0x41,0x41,0x7F,0x00},         //   ( 61)  ] - 0x005D Right Square Bracket
     {0x04,0x02,0x01,0x02,0x04},         //   ( 62)  ^ - 0x005E Circumflex Accent
     {0x40,0x40,0x40,0x40,0x40},         //   ( 63)  _ - 0x005F Low Line
     {0x01,0x02,0x04,0x00,0x00},         //   ( 64)  ` - 0x0060 Grave Accent
     {0x20,0x54,0x54,0x54,0x78},         //   ( 65)  a - 0x0061 Latin Small Letter A
     {0x7F,0x48,0x44,0x44,0x38},         //   ( 66)  b - 0x0062 Latin Small Letter B
     {0x38,0x44,0x44,0x44,0x20},         //   ( 67)  c - 0x0063 Latin Small Letter C
     {0x38,0x44,0x44,0x48,0x7F},         //   ( 68)  d - 0x0064 Latin Small Letter D
     {0x38,0x54,0x54,0x54,0x18},         //   ( 69)  e - 0x0065 Latin Small Letter E
     {0x08,0x7E,0x09,0x01,0x02},         //   ( 70)  f - 0x0066 Latin Small Letter F
     {0x06,0x49,0x49,0x49,0x3F},         //   ( 71)  g - 0x0067 Latin Small Letter G
     {0x7F,0x08,0x04,0x04,0x78},         //   ( 72)  h - 0x0068 Latin Small Letter H
     {0x00,0x44,0x7D,0x40,0x00},         //   ( 73)  i - 0x0069 Latin Small Letter I
     {0x20,0x40,0x44,0x3D,0x00},         //   ( 74)  j - 0x006A Latin Small Letter J
     {0x7F,0x10,0x28,0x44,0x00},         //   ( 75)  k - 0x006B Latin Small Letter K
     {0x00,0x41,0x7F,0x40,0x00},         //   ( 76)  l - 0x006C Latin Small Letter L
     {0x7C,0x04,0x18,0x04,0x7C},         //   ( 77)  m - 0x006D Latin Small Letter M
     {0x7C,0x08,0x04,0x04,0x78},         //   ( 78)  n - 0x006E Latin Small Letter N
     {0x38,0x44,0x44,0x44,0x38},         //   ( 79)  o - 0x006F Latin Small Letter O
     {0x7C,0x14,0x14,0x14,0x08},         //   ( 80)  p - 0x0070 Latin Small Letter P
     {0x08,0x14,0x14,0x18,0x7C},         //   ( 81)  q - 0x0071 Latin Small Letter Q
     {0x7C,0x08,0x04,0x04,0x08},         //   ( 82)  r - 0x0072 Latin Small Letter R
     {0x48,0x54,0x54,0x54,0x20},         //   ( 83)  s - 0x0073 Latin Small Letter S
     {0x04,0x3F,0x44,0x40,0x20},         //   ( 84)  t - 0x0074 Latin Small Letter T
     {0x3C,0x40,0x40,0x20,0x7C},         //   ( 85)  u - 0x0075 Latin Small Letter U
     {0x1C,0x20,0x40,0x20,0x1C},         //   ( 86)  v - 0x0076 Latin Small Letter V
     {0x3C,0x40,0x30,0x40,0x3C},         //   ( 87)  w - 0x0077 Latin Small Letter W
     {0x44,0x28,0x10,0x28,0x44},         //   ( 88)  x - 0x0078 Latin Small Letter X
     {0x0C,0x50,0x50,0x50,0x3C},         //   ( 89)  y - 0x0079 Latin Small Letter Y
     {0x44,0x64,0x54,0x4C,0x44},         //   ( 90)  z - 0x007A Latin Small Letter Z
     {0x00,0x08,0x36,0x41,0x00},         //   ( 91)  { - 0x007B Left Curly Bracket
     {0x00,0x00,0x7F,0x00,0x00},         //   ( 92)  | - 0x007C Vertical Line
     {0x00,0x41,0x36,0x08,0x00},         //   ( 93)  } - 0x007D Right Curly Bracket
     {0x02,0x01,0x02,0x04,0x02},         //   ( 94)  ~ - 0x007E Tilde
     {0x08,0x14,0x2A,0x14,0x22},         //   ( 95) << - 0x00AB Left-Pointing Double Angle Quotation Mark
     {0x00,0x02,0x05,0x02,0x00},         //   ( 96)    - 0x00B0 Degree Sign
     {0x44,0x44,0x5F,0x44,0x44},         //   ( 97) +- - 0x00B1 Plus-Minus Sign
     {0x7E,0x20,0x20,0x10,0x3E},         //   ( 98)  u - 0x00B5 Micro Sign
     {0x22,0x14,0x2A,0x14,0x08},         //   ( 99) >> - 0x00BB Right-Pointing Double Angle Quotation Mark
     {0x30,0x48,0x45,0x40,0x20},         //   (100)  ? - 0x00BF Inverted Question Mark
     {0x22,0x14,0x08,0x14,0x22},         //   (101)  x - 0x00D7 Multiplcation Sign
     {0x08,0x08,0x2A,0x08,0x08},         //   (102)  + - 0x00F7 Division Sign
     {0x18,0x14,0x08,0x14,0x0C},         //   (103)    - 0x221E Infinity
     {0x44,0x4A,0x4A,0x51,0x51},         //   (104)  < - 0x2264 Less-Than or Equal to
     {0x51,0x51,0x4A,0x4A,0x44},         //   (105)  > - 0x2265 Greater-Than or Equal to
     {0x54,0x14,0x64,0x08,0x70},         //   (106)  .: - RF Symbol
     {0x70,0x7C,0x72,0x7C,0x70},         //   (107)  ^ - Lock symbol
     {0x70,0x5C,0x52,0x54,0x70},         //   (108)  / - Unlock symbol
     {0x0C,0x1E,0x3C,0x1E,0x0C},         //   (109)  <3 - Heart Symbol
     {0x18,0x22,0xFF,0x12,0x0C},         //   (110)  U - USB Symbol
 };
 /*
 void ssd1306_DrawChar(uint8_t x, uint8_t y, uint8_t c, struct FONT_DEF font)
+{
   uint8_t col, column[font.u8Width];
   // Check if the requested character is available
   if ((c >= font.u8FirstChar) && (c <= font.u8LastChar))
+  {
     // Retrieve appropriate columns from font data
     for (col = 0; col < font.u8Width; col++)
 void setStartPage(unsigned char d)
+    {
       column[col] = font.au8FontTable[((c - 32) * font.u8Width) + col];    // Get first column of appropriate character
     WriteCommand(0xB0|d);       // Set Page Start Address for Page Addressing Mode
                                 // Default => 0xB0 (0x00)
+    }
+  }
   else
 /* Below are functions used to configure the OLED */
 void setStartColumn(unsigned char d)
+  {
     // Requested character is not available in this font ... send a space instead
     for (col = 0; col < font.u8Width; col++)
+    {
       column[col] = 0xFF;    // Send solid space
+    }
     WriteCommand(0x00+d%16);    // Set Lower Column Start Address for Page Addressing Mode
     WriteCommand(0x10+d/16);    // Set Higher Column Start Address for Page Addressing Mode
                                 // Default => 0x10
+  }
   // Render each column
   uint16_t xoffset, yoffset;
   for (xoffset = 0; xoffset < font.u8Width; xoffset++)
 /* Print a single character from font.cpp */
 void ssd1306_DrawChar(char ascii, unsigned char row, unsigned char xPos)
+  {
     for (yoffset = 0; yoffset < (font.u8Height + 1); yoffset++)
     char *srcPointer = 0;
     unsigned char i;
     srcPointer = &fontData[(ascii-32)][0];
     setStartPage(row);
     setStartColumn(xPos);
     for(i=0;i<5;i++)
+    {
       uint8_t bit = 0x00;
       bit = (column[xoffset] << (8 - (yoffset + 1)));     // Shift current row bit left
       bit = (bit >> 7);                     // Shift current row but right (results in 0x01 for black, and 0x00 for white)
       if (bit)
         WriteData(*srcPointer);
         srcPointer++;
+    }
     WriteData(0x00);
+}
 void ssd1306_DrawString(const char *dataPtr, unsigned char row, unsigned char xPos)
+      {
         ssd1306_DrawPixel(x + xoffset, y + yoffset, 1);
     char *srcPointer;
     srcPointer = (char*)dataPtr;
     ssd1306_DrawChar(' ',row,xPos); // NBSP must be written first before the string start
     while(1)
+    {
         ssd1306_DrawChar(*srcPointer,row,xPos);
         srcPointer++;
         xPos+=6;
         if(*srcPointer == 0) break;
+      }
+    }
+  }
+}
 ssd1306_DrawString(uint8_t x, uint8_t y, const char *text, struct FONT_DEF font)
+{
   uint8_t l;
   for (l = 0; l < strlen(text); l++)
+  {
     ssd1306DrawChar(x + (l * (font.u8Width + 1)), y, text[l], font);
+  }
+}
 */

ssd1306.h

➞

Show inline comments

 #ifndef   ssd1306_H
 #define   ssd1306_H
 #include "DrawText.h"
 void  ssd1306_Init(void);
 void  StartPageTransfer(void);
 extern  const DeviceProp  ssd1306_Prop;
 unsigned long ssd1306_DrawBlock(Pos_t x, Pos_t y, Pos_t cx, Pos_t cy, const unsigned char* data);
 unsigned long ssd1306_IsOn(void);
 unsigned long ssd1306_TurnOff(void);
 unsigned long ssd1306_TurnOn(void);
 unsigned char ssd1306_SetContrast(unsigned char contrast);
 unsigned char ssd1306_GetContrast();
 unsigned char* ssd1306_GetBuffer();
 unsigned long ssd1306_DrawPoint(Pos_t x, Pos_t y, Color_t color);
 void ssd1306_block_write(void);
 void ssd1306_DrawChar(char ascii, unsigned char row, unsigned char xPos);
 void ssd1306_DrawString(const char *dataPtr, unsigned char row, unsigned char xPos);
 #endif

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