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Help with this function

 
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cvargcal



Joined: 17 Feb 2015
Posts: 134

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Help with this function
PostPosted: Sat Apr 06, 2019 11:42 pm     Reply with quote
I want use this function

Code:
void SSD1306_DrawPixel(uint8_t x, uint8_t y, int1 color = TRUE) {
  if ((x >= SSD1306_LCDWIDTH) || (y >= SSD1306_LCDHEIGHT))    return;
 
  if    (color)    buffer[x + (uint16_t)(y / 8) * SSD1306_LCDWIDTH] |=  (1 << (y & 7)); 
  else             buffer[x + (uint16_t)(y / 8) * SSD1306_LCDWIDTH] &=  ~(1 << (y & 7));
}


I want draw any icon in buffer mapping

Code:
void SSD1306_Drawicon(uint8_t x, uint8_t y, char *c, int16_t w, int16_t h) {
 
  int16_t i, j, byteWidth = (w + 7) / 8;

 uint8_t ptr;
   for(i = 0; i < h; i++ ) {
      ptr = c[i];   
      for(j = 0; j < w; j++, ptr >>= 1) {
        if(ptr & 0x01)           SSD1306_DrawPixel(x + i, y + j);   
     
     
     //  if(bit_test(c[i], 7-j))          SSD1306_DrawPixel(x+i, y+j);

      }

    }
  }


using

Code:
const unsigned char bat_4 [32] = {
0xE0, 0xF0, 0xF8, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0xB8, 0xB8, 0x38, 0x38, 0xF0, 0xE0, 0x80,
0x07, 0x0F, 0x1F, 0x1C, 0x1C, 0x1D, 0x1F, 0x1F, 0x1D, 0x1D, 0x1D, 0x1D, 0x1C, 0x0F, 0x07, 0x01
};

SSD1306_DrawCharx(40,40,bat_4,16,16);


The function work 50%, only keep half array of bat_4 in array buffer. When I display buffer, only show top part of icon.

My question is, how i can keep array bat_4, on array buffer but with postion x,y, buffer is of 1024, I am making bab the tranverse array.
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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Re: Help with this function
PostPosted: Sun Apr 07, 2019 12:48 am     Reply with quote
cvargcal wrote:

void SSD1306_Drawicon(uint8_t x, uint8_t y, char *c, int16_t w, int16_t h) {

int16_t i, j, byteWidth = (w + 7) / 8;

uint8_t ptr;
for(i = 0; i < h; i++ ) {
ptr = c[i];
for(j = 0; j < w; j++, ptr >>= 1) {
if(ptr & 0x01) SSD1306_DrawPixel(x + i, y + j);


// if(bit_test(c[i], 7-j)) SSD1306_DrawPixel(x+i, y+j);

}

}
}

// using:

SSD1306_DrawCharx(40, 40, bat_4, 16, 16);

// The function work 50%

First, the variable that you call 'ptr' is not a pointer, it's the data.
It's just a byte of data from the bat_4 array. That's just an issue
of giving it a confusing name.

The real problem is that your width is 16 pixels, but your data (called 'ptr')
is only one byte of 8 bits. You need to be processing 2 bytes (16 bits) for
the width.

Also, what is the symbol 'bat_4' supposed to be ? Describe it. Is it
a rectangle that's partially filled up, like a battery would be partially full ?
cvargcal



Joined: 17 Feb 2015
Posts: 134

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Re: Help with this function
PostPosted: Sun Apr 07, 2019 2:14 am     Reply with quote
PCM programmer wrote:
cvargcal wrote:

void SSD1306_Drawicon(uint8_t x, uint8_t y, char *c, int16_t w, int16_t h) {

int16_t i, j, byteWidth = (w + 7) / 8;

uint8_t ptr;
for(i = 0; i < h; i++ ) {
ptr = c[i];
for(j = 0; j < w; j++, ptr >>= 1) {
if(ptr & 0x01) SSD1306_DrawPixel(x + i, y + j);


// if(bit_test(c[i], 7-j)) SSD1306_DrawPixel(x+i, y+j);

}

}
}

// using:

SSD1306_DrawCharx(40, 40, bat_4, 16, 16);

// The function work 50%

First, the variable that you call 'ptr' is not a pointer, it's the data.
It's just a byte of data from the bat_4 array. That's just an issue
of giving it a confusing name.

The real problem is that your width is 16 pixels, but your data (called 'ptr')
is only one byte of 8 bits. You need to be processing 2 bytes (16 bits) for
the width.

Also, what is the symbol 'bat_4' supposed to be ? Describe it. Is it
a rectangle that's partially filled up, like a battery would be partially full ?



Thanks you

the bat_0 is full, I tried with this but not show correct the pixel

Code:
void drawXbm(int16_t xMove, int16_t yMove, int16_t width, int16_t height,  char *xbm) {
  int16_t widthInXbm = (width + 7) / 8;
  uint8_t data = 0;

  for(int16_t y = 0; y < height; y++) {
    for(int16_t x = 0; x < width; x++ ) {
      if (x & 7) {
        data >>= 1; // Move a bit
      } else {  // Read new data every 8 bit
        data = xbm[(x / 8) + y * widthInXbm];
      }
      // if there is a bit draw it
      if (data & 0x01) {
        SSD1306_DrawPixel(xMove + x, yMove + y);
      }
    }
  }
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Apr 07, 2019 3:20 am     Reply with quote
Post a link to an image on a website that shows me what the bat_4 symbol
should look like.

For example, which one of these icons is bat_4 supposed to look like ?
https://www.freepik.com/free-vector/battery-icons-collection_1095897.htm
Also, those symbols are vertical. Is the bat_4 symbol vertical or horizontal ?

Be accurate and complete in your answer.
cvargcal



Joined: 17 Feb 2015
Posts: 134

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PostPosted: Sun Apr 07, 2019 8:31 am     Reply with quote
PCM programmer wrote:
Post a link to an image on a website that shows me what the bat_4 symbol
should look like.

For example, which one of these icons is bat_4 supposed to look like ?
https://www.freepik.com/free-vector/battery-icons-collection_1095897.htm
Also, those symbols are vertical. Is the bat_4 symbol vertical or horizontal ?

Be accurate and complete in your answer.


Look,

full
Code:
void SSD1306_Icon(char *icon, uint8_t seg, uint8_t pag, uint8_t _width, uint8_t _height){ //x,y
uint8_t i, j;
uint8_t x_seg, y_pag;
y_pag = pag;

for(i = 0; i < _height / 8; i++)   {
    x_seg = seg;
    for(j = 0; j < _width; j++)       {
           SSD1306_SetPointer(x_seg, y_pag);
            SSD1306_WriteRam(*icon);                    // Directamente al display
          // buffer[x_seg + (y_pag * 128)] = *icon;    // On buffer
        icon++;
        x_seg++;
       }
    y_pag++;
   }


Half


Code:
void SSD1306_DrawCharx(uint8_t x, uint8_t y, char *c, int16_t w, int16_t h,int size) {
  int16_t i, j, byteWidth = (w + 7) / 8;

   uint8_t ptr;
   for(i = 0; i < h; i++ ) {
      ptr = c[i];   
         
      for(j = 0; j < w; j++, ptr >>= 1) {
     
     // if(bit_test(c[i], 7-j))          SSD1306_DrawPixel(x+i, y+j);
      if(ptr & 0x01)           SSD1306_DrawPixel(x + i, y + j);     //   else          SSD1306_FillRect(x + (i * size), y + (j * size), size, size);
      }
    }
}




rares bit

Code:
void drawXbm(int16_t xMove, int16_t yMove, int16_t width, int16_t height,  char *xbm) {
  int16_t widthInXbm = (width + 7) / 8;
  uint8_t data = 0;

  for(int16_t y = 0; y < height; y++) {
    for(int16_t x = 0; x < width; x++ ) {
      if (x & 7) {
        data >>= 1; // Move a bit
      } else {  // Read new data every 8 bit
        data = xbm[(x / 8) + y * widthInXbm];
      }
      // if there is a bit draw it
      if (data & 0x01) {
        SSD1306_DrawPixel(xMove + x, yMove + y);
      }
    }
  }
}






I can draw any icon, but the problem is that I have show with "pag ans seg" so I can not draw the icon where i want because the the PAG is 0...7, so if I start in PAG 0, I can not draw in top screen without over rectangle.

With the function drawpixel(x,y) I can draw all bits in buffer array with direction for after display all buffer.
temtronic



Joined: 01 Jul 2010
Posts: 9174
Location: Greensville,Ontario

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PostPosted: Sun Apr 07, 2019 8:33 am     Reply with quote
OK, looks like you're using Proteus and NOT real hardware .
Is this correct ?
cvargcal



Joined: 17 Feb 2015
Posts: 134

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PostPosted: Sun Apr 07, 2019 8:44 am     Reply with quote
temtronic wrote:
OK, looks like you're using Proteus and NOT real hardware .
Is this correct ?


Yes, but its the same in real. I tested
empty



Joined: 13 Jan 2018
Posts: 15

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PostPosted: Sun Apr 07, 2019 10:47 am     Reply with quote
Look, if you're using this driver:
https://simple-circuit.com/ssd1306-oled-ccs-c-library/

just use the function: SSD1306_ROMBMP( ...
you can print your icon wherever you want, for example:
Code:

const unsigned char bat_4 [32] = {
0xE0, 0xF0, 0xF8, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0xB8, 0xB8, 0x38, 0x38, 0xF0, 0xE0, 0x80,
0x07, 0x0F, 0x1F, 0x1C, 0x1C, 0x1D, 0x1F, 0x1F, 0x1D, 0x1D, 0x1D, 0x1D, 0x1C, 0x0F, 0x07, 0x01
};

void main(void)
{
  SSD1306_Begin(SSD1306_SWITCHCAPVCC, SSD1306_I2C_ADDRESS);
  SSD1306_ClearDisplay();

  SSD1306_ROMBMP(0, 0, bat_4, 16, 16);
  SSD1306_ROMBMP(40, 15, bat_4, 16, 16);
  SSD1306_ROMBMP(80, 30, bat_4, 16, 16);
  SSD1306_ROMBMP(111, 47, bat_4, 16, 16);

  SSD1306_Display();
 
  while (TRUE)
    ;

}


This is simulation result:

cvargcal



Joined: 17 Feb 2015
Posts: 134

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PostPosted: Sun Apr 07, 2019 11:25 am     Reply with quote
empty wrote:
Look, if you're using this driver:
https://simple-circuit.com/ssd1306-oled-ccs-c-library/

just use the function: SSD1306_ROMBMP( ...
you can print your icon wherever you want, for example:
Code:

const unsigned char bat_4 [32] = {
0xE0, 0xF0, 0xF8, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0xB8, 0xB8, 0x38, 0x38, 0xF0, 0xE0, 0x80,
0x07, 0x0F, 0x1F, 0x1C, 0x1C, 0x1D, 0x1F, 0x1F, 0x1D, 0x1D, 0x1D, 0x1D, 0x1C, 0x0F, 0x07, 0x01
};

void main(void)
{
  SSD1306_Begin(SSD1306_SWITCHCAPVCC, SSD1306_I2C_ADDRESS);
  SSD1306_ClearDisplay();

  SSD1306_ROMBMP(0, 0, bat_4, 16, 16);
  SSD1306_ROMBMP(40, 15, bat_4, 16, 16);
  SSD1306_ROMBMP(80, 30, bat_4, 16, 16);
  SSD1306_ROMBMP(111, 47, bat_4, 16, 16);

  SSD1306_Display();
 
  while (TRUE)
    ;

}


This is simulation result:




Shocked Shocked

In that page these other lib , woooow I had the answer all time.

Thanks you!!!
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