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Topic: Composite Video Generating (Read 7934 times) previous topic - next topic

Gericom

#15
Mar 20, 2013, 03:16 pm Last Edit: Mar 20, 2013, 03:46 pm by Gericom Reason: 1
I've tried some things with dma, but now my arduino doesn't work anymore. I have seriously no idea what's the problem.

Edit: It works again. I pressed the erease and the reset button at the same time, and were able to upload a sketch again. After that everything worked well again.
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Markus_L811


I've tried some things with dma, but now my arduino doesn't work anymore. I have seriously no idea what's the problem.

Edit: It works again. I pressed the erease and the reset button at the same time, and were able to upload a sketch again. After that everything worked well again.

Lucky men, I know this kind of happiness...

Gericom



I've tried some things with dma, but now my arduino doesn't work anymore. I have seriously no idea what's the problem.

Edit: It works again. I pressed the erease and the reset button at the same time, and were able to upload a sketch again. After that everything worked well again.

Lucky men, I know this kind of happiness...

Yea, first I thought it has broken. But then I just tried some random things, and then by purpose the bossac com port connected to my pc.

By the way, I changed the loop (with asm code) and now it is 330 px width.
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stimmer

Success!  8) :smiley-mr-green: XD
Due VGA library - http://arduino.cc/forum/index.php/topic,150517.0.html

Gericom

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stimmer

The code needs tidying and commenting and debugging before I can share it (and before I forget how it works). I have got colour out of 3 monitors so far so it is looking good. This is using NTSC timings, I will try PAL another day. Resolution is  640x200 (or about 700x220 with overscan), but practically the Arduino won't be fast enough or have the ram to make use of all that. I may aim for a 160x200 mode.

Grayscale, colour bars and dot crawl :)
Due VGA library - http://arduino.cc/forum/index.php/topic,150517.0.html

Gericom

#21
Mar 21, 2013, 07:17 am Last Edit: Mar 21, 2013, 02:47 pm by Gericom Reason: 1

The code needs tidying and commenting and debugging before I can share it (and before I forget how it works). I have got colour out of 3 monitors so far so it is looking good. This is using NTSC timings, I will try PAL another day. Resolution is  640x200 (or about 700x220 with overscan), but practically the Arduino won't be fast enough or have the ram to make use of all that. I may aim for a 160x200 mode.

Grayscale, colour bars and dot crawl :)


Sorry, but I wanted to make such library. I really appreciate your help, but I want to do things myself. Could you give me the dma stuff at least?
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stimmer

This is just the DMA section of the code:
Code: [Select]
// Continuous DMA -> SMC port (pins 34-41)
// by stimmer

// set up 2 DMA buffers and a linked list
// 888 and 222 is NTSC timings (~15750 buffers/sec)
uint8_t dmabuf[2][888];
uint32_t dmall[10]={(uint32_t)dmabuf[0],0x60000000,0x22060000+222,0x20000000,(uint32_t)(dmall+5),
                    (uint32_t)dmabuf[1],0x60000000,0x22060000+222,0x20000000,(uint32_t)dmall};
int cbuf=0; // current buffer index

void  DMAC_Handler()
{
    uint32_t dummy=REG_DMAC_EBCISR; // clear DMA interrupt flag
    dmall[2+5*cbuf]=0x22060000+222; // may not be needed

  // write to dmabuf[cbuf] here   
  // you only have 6 clock cycles per byte! 
  // write words and longs where you can for speed
 
    cbuf=1-cbuf;
}

void setup() {
 
  // set up memory controller
  REG_PMC_PCER0= 1<<9;
  REG_SMC_SETUP0=0; 
  REG_PIOC_PDR=0b1111111100;
  REG_PIOC_ABSR&=~0b1111111100; 
  REG_SMC_WPCR=0x534d4300;
  REG_SMC_SETUP0=0x00000000;
  REG_SMC_PULSE0=0X00000101;
  REG_SMC_CYCLE0=0X00000006; // this sets the DMA rate -  84/6=14 MByte/sec
  REG_SMC_TIMINGS0=0;
  REG_SMC_MODE0=0x00000000;
 
  // this code puts DMA priority above CPU.
  MATRIX->MATRIX_WPMR=0x4d415400;
  for(int i=0;i<6;i++)MATRIX->MATRIX_MCFG[i]=1;
  MATRIX->MATRIX_MCFG[4]=4;
  for(int i=0;i<8;i++)MATRIX->MATRIX_SCFG[i]=0x01000008;
  MATRIX->MATRIX_SCFG[6]=0x011200ff;
  MATRIX->MATRIX_PRAS0=MATRIX->MATRIX_PRAS1=MATRIX->MATRIX_PRAS2=0x00000000;
  MATRIX->MATRIX_PRAS3=MATRIX->MATRIX_PRAS4=MATRIX->MATRIX_PRAS5=0x00000000;
  MATRIX->MATRIX_PRAS6=0x00030000;
  MATRIX->MATRIX_PRAS7=MATRIX->MATRIX_PRAS8=0x00000000;

  // set up DMA
  REG_PMC_PCER1= 1<<7; 
  REG_DMAC_WPMR=DMAC_WPMR_WPKEY(0x444d4143);
  REG_DMAC_EN=1;
  REG_DMAC_GCFG=0x00;
  REG_DMAC_CFG5=0x10702200;
  REG_DMAC_DSCR5=(uint32_t)dmall;
  REG_DMAC_EBCIER=1<<5;
  NVIC_EnableIRQ(DMAC_IRQn);
 
  // start DMA
  REG_DMAC_CHER=1<<5;

}

void loop() {
 
}
Due VGA library - http://arduino.cc/forum/index.php/topic,150517.0.html

Gericom

#23
Mar 21, 2013, 03:04 pm Last Edit: Mar 21, 2013, 03:09 pm by Gericom Reason: 1

This is just the DMA section of the code:
Code: [Select]
// Continuous DMA -> SMC port (pins 34-41)
// by stimmer

// set up 2 DMA buffers and a linked list
// 888 and 222 is NTSC timings (~15750 buffers/sec)
uint8_t dmabuf[2][888];
uint32_t dmall[10]={(uint32_t)dmabuf[0],0x60000000,0x22060000+222,0x20000000,(uint32_t)(dmall+5),
                   (uint32_t)dmabuf[1],0x60000000,0x22060000+222,0x20000000,(uint32_t)dmall};
int cbuf=0; // current buffer index

void  DMAC_Handler()
{
   uint32_t dummy=REG_DMAC_EBCISR; // clear DMA interrupt flag
   dmall[2+5*cbuf]=0x22060000+222; // may not be needed

 // write to dmabuf[cbuf] here  
 // you only have 6 clock cycles per byte!  
 // write words and longs where you can for speed
 
   cbuf=1-cbuf;
}

void setup() {
 
 // set up memory controller
 REG_PMC_PCER0= 1<<9;
 REG_SMC_SETUP0=0;  
 REG_PIOC_PDR=0b1111111100;
 REG_PIOC_ABSR&=~0b1111111100;  
 REG_SMC_WPCR=0x534d4300;
 REG_SMC_SETUP0=0x00000000;
 REG_SMC_PULSE0=0X00000101;
 REG_SMC_CYCLE0=0X00000006; // this sets the DMA rate -  84/6=14 MByte/sec
 REG_SMC_TIMINGS0=0;
 REG_SMC_MODE0=0x00000000;
 
 // this code puts DMA priority above CPU.
 MATRIX->MATRIX_WPMR=0x4d415400;
 for(int i=0;i<6;i++)MATRIX->MATRIX_MCFG[i]=1;
 MATRIX->MATRIX_MCFG[4]=4;
 for(int i=0;i<8;i++)MATRIX->MATRIX_SCFG[i]=0x01000008;
 MATRIX->MATRIX_SCFG[6]=0x011200ff;
 MATRIX->MATRIX_PRAS0=MATRIX->MATRIX_PRAS1=MATRIX->MATRIX_PRAS2=0x00000000;
 MATRIX->MATRIX_PRAS3=MATRIX->MATRIX_PRAS4=MATRIX->MATRIX_PRAS5=0x00000000;
 MATRIX->MATRIX_PRAS6=0x00030000;
 MATRIX->MATRIX_PRAS7=MATRIX->MATRIX_PRAS8=0x00000000;

 // set up DMA
 REG_PMC_PCER1= 1<<7;  
 REG_DMAC_WPMR=DMAC_WPMR_WPKEY(0x444d4143);
 REG_DMAC_EN=1;
 REG_DMAC_GCFG=0x00;
 REG_DMAC_CFG5=0x10702200;
 REG_DMAC_DSCR5=(uint32_t)dmall;
 REG_DMAC_EBCIER=1<<5;
 NVIC_EnableIRQ(DMAC_IRQn);
 
 // start DMA
 REG_DMAC_CHER=1<<5;

}

void loop() {
 
}


Thanks, but what if I want to transfer only one buffer at a time? (After calling  REG_DMAC_CHER=1<<5;)
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Gericom

#24
Mar 29, 2013, 04:06 pm Last Edit: Mar 29, 2013, 04:54 pm by Gericom Reason: 1
The last few days, I worked on writing a wss. It was not easy, but now widescreen is possible. I have also made some progress on the color stuff. But not on the arduino yet. I first made an application on the pc to generate composite video signals from pictures. It works great. (I got another tool to get it colored again) I will work soon on color for the arduino.
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Gericom

Some progress on coloring is made, but I can't get those colors to be smooth.
On the picture you can see from top to bottom Red, Green and Blue. (The green is the most bad one. But you can see some green spots)
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Gericom

This is much better already. (Same picture as above):
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Gericom

Light blue (#00c0c0):
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Gericom

Arduino logo:
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Gericom

I got the colors almost perfect now.   :smiley-mr-green:
The Arduino logo, the SNES logo, and an Itembox of mkdd:
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