FT811 read REG_ID

[raydem]

Hello,

I have a FT811 and I am triying to Read the REG_ID, but only get 0xBE. My code is:

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          EVE_pdn_clear();
  DELAY_MS(21); /* minimum time to allow from rising PD_N to first access is 20ms */
          EVE_cmdWrite(EVE_CLKEXT,0); /* setup EVE for external clock */
          EVE_cmdWrite(EVE_CLKSEL,0x46); /* set clock to 72 MHz */
          EVE_cmdWrite(EVE_ACTIVE,0); /* start EVE */
          DELAY_MS(500);
          chipid = EVE_memRead8(REG_ID);


And the SPI signals are:

CLKEXT and CLKSEL commands.


Active command.


Read REG_ID.

[BRT Community]

Hello,

The FT81x can only run at 60MHz and so you could try removing the line below to see if it helps.

EVE_cmdWrite(EVE_CLKSEL,0x46); /* set clock to 72 MHz */

Also, ensure the board that you use has the external crystal fitted.

Best Regards, BRT Community

[raydem]

Thank you very much, Now appear that works.

I am trying to config the Display. Could you help me, please? The display is COM24H2P71ULC of 320x240. This is the data of datasheet:



The config that I suppose is:

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#define EVE_HSIZE   (240L)  /* Thd Length of visible part of line (in PCLKs) - display width */
#define EVE_VSIZE   (320L)  /* Tvd Number of visible lines (in lines) - display height */

#define EVE_VSYNC0  (0L)    /* Tvf Vertical Front Porch */
#define EVE_VSYNC1  (2L)    /* Tvf + Tvp Vertical Front Porch plus Vsync Pulse width */
#define EVE_VOFFSET (10L)   /* Tvf + Tvp + Tvb Number of non-visible lines (in lines) */ //DELETE
#define EVE_VCYCLE  (340L)  /* Tv Total number of lines (visible and non-visible) (in lines) */
#define EVE_HSYNC0  (0L)   /* (40L)   // Thf Horizontal Front Porch */
#define EVE_HSYNC1  (20L)   /* Thf + Thp Horizontal Front Porch plus Hsync Pulse width */
#define EVE_HOFFSET (40L)   /* Thf + Thp + Thb Length of non-visible part of line (in PCLK cycles) */
#define EVE_HCYCLE  (296L)  /* Th Total length of line (visible and non-visible) (in PCLKs) */


#define EVE_PCLK    (10L) // 60/10 = 6 MHz
#define EVE_PCLKPOL (1L) // negative active clock edge
#define EVE_SWIZZLE (0L) // order of bits in each colour channel to be reserved.
#define EVE_CSPREAD (1L) // helps reduce the switching noise




[Rudolph]

I just went over the datasheet and I would try this:

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#define EVE_HSIZE   (240L)
#define EVE_VSIZE   (320L)
#define EVE_VSYNC0  (10L)
#define EVE_VSYNC1  (12L)
#define EVE_VOFFSET (22L)
#define EVE_VCYCLE  (340L)
#define EVE_HSYNC0  (16L)
#define EVE_HSYNC1  (36L)
#define EVE_HOFFSET (76L)
#define EVE_HCYCLE  (296L)
#define EVE_PCLK    (10L)
#define EVE_PCLKPOL (0L)
#define EVE_SWIZZLE (0L)
#define EVE_CSPREAD (1L)


This display is however not like any other I have used so far.


And while I noticed that you have used my library, it looks like you have rewritten it starting partly from scratch.
Nothing wrong with this.
But is there anything that I could improve upon?


Which controller are you using?
The SPI timing is rather strange with so much time before CS goes high again.

[raydem]

I just went over the datasheet and I would try this:

Code Select Expand


#define EVE_HSIZE   (240L)
#define EVE_VSIZE   (320L)
#define EVE_VSYNC0  (10L)
#define EVE_VSYNC1  (12L)
#define EVE_VOFFSET (22L)
#define EVE_VCYCLE  (340L)
#define EVE_HSYNC0  (16L)
#define EVE_HSYNC1  (36L)
#define EVE_HOFFSET (76L)
#define EVE_HCYCLE  (296L)
#define EVE_PCLK    (10L)
#define EVE_PCLKPOL (0L)
#define EVE_SWIZZLE (0L)
#define EVE_CSPREAD (1L)


This display is however not like any other I have used so far.


And while I noticed that you have used my library, it looks like you have rewritten it starting partly from scratch.
Nothing wrong with this.
But is there anything that I could improve upon?


Which controller are you using?
The SPI timing is rather strange with so much time before CS goes high again.

Thanks for the answer. Finally, I achieved it. This is the configuration.

Code Select Expand


#define EVE_HSIZE   (240L)
#define EVE_VSIZE   (320L)
#define EVE_VSYNC0  (10L)
#define EVE_VSYNC1  (12L)
#define EVE_VOFFSET (22L)
#define EVE_VCYCLE  (342L)
#define EVE_HSYNC0  (16L)
#define EVE_HSYNC1  (36L)
#define EVE_HOFFSET (76L)
#define EVE_HCYCLE  (316L)
#define EVE_PCLK    (10L)
#define EVE_PCLKPOL (1L)
#define EVE_SWIZZLE (0L)
#define EVE_CSPREAD (0L)


I have not problem with your code and it is good, but I had to adapt it for my code .  About the time before CS high, yes, It is because I am using a OS (Not RTOS, It our own OS). I But I think that I not have problem with this. Now, I draw in the LCD well, but I have a stranger problem. First, I need to use the SPI communication few as possible, so I put all in a buffer and send it once. (of course that some commands will be separatly). But, for example in the next code. I buffered a list and send it, the first time that execute StaticBackground the display shows the rigth draw but when change the color and draw again.... Nothing happens.

Code Select Expand


Private void W32(uint8 *start, const uint32 data){
    uint8 cont = *start;

    gpDataBuffer[++cont] = (uint8)(data & 0x000000ff);
    gpDataBuffer[++cont] = (uint8)(data >> 8);
    gpDataBuffer[++cont] = (uint8)(data >> 16);
    gpDataBuffer[++cont] = (uint8)(data >> 24);

    *start = cont;
}

    Private void StaticBackground(uint16 *start){
        uint8 cont = *start;

        uint32 address =  EVE_RAM_DL; // 0x00300000;

        gpDataBuffer[cont] = (uint8)((address >> 16) | MEM_WRITE);
        gpDataBuffer[++cont] = (uint8)(address >> 8);
        gpDataBuffer[++cont] = (uint8)(address & 0x000000ff);


           if(change == 0u){
                W32(&cont, CLEAR_COLOR_RGB(0,255,255));
                W32(&cont, COLOR_RGB(255,0,0));
           }
           else{
                W32(&cont, CLEAR_COLOR_RGB(255,255,0));
                W32(&cont, COLOR_RGB(0,255,0));
           }
       
         W32(&cont, CLEAR(1,1,1));
        W32(&cont, BEGIN(EVE_POINTS));
        W32(&cont, POINT_SIZE(200));
        W32(&cont, VERTEX2II(120,120,0,0));
        W32(&cont, END());
        W32(&cont, DISPLAY());

       SendGraphicData(++cont); //Send over SPI the buffer
}

void Main(){
    uint8 change = 0u;
    Init_EVE();
    while(1){
        StaticBackground(0);
        EveMemWrite(SEND_8_BITS, REG_DLSWAP, EVE_DLSWAP_FRAME); //Send over SPI DLSWAP
        if (0u == change)
               change = 1u;
        else
               change = 0u;

        DELAY_MS(5000);
}
}