LPC1778 emc init with sram k6x1008td2

[lpcware]

Content originally posted in LPCWare by Dfcbkbq on Fri Sep 12 05:53:33 MST 2014
The shematic is follows:
[img=1024x692]https://dl.dropboxusercontent.com/u/5149769/sramConnection.png[/img]

I try to init emc controller for it. Here my code:

void SRAMInit( void )
{
volatile uint32_t i;
volatile unsigned long Dummy;

LPC_IOCON->P3_0 = 0x21;
LPC_IOCON->P3_1 = 0x21;
LPC_IOCON->P3_2 = 0x21;
LPC_IOCON->P3_3 = 0x21;
LPC_IOCON->P3_4 = 0x21;
LPC_IOCON->P3_5 = 0x21;
LPC_IOCON->P3_6 = 0x21;
LPC_IOCON->P3_7 = 0x21;

LPC_IOCON->P4_0 = 0x21;
LPC_IOCON->P4_1 = 0x21;
LPC_IOCON->P4_2 = 0x21;
LPC_IOCON->P4_3 = 0x21;
LPC_IOCON->P4_4 = 0x21;
LPC_IOCON->P4_5 = 0x21;
LPC_IOCON->P4_6 = 0x21;
LPC_IOCON->P4_7 = 0x21;
LPC_IOCON->P4_8 = 0x21;
LPC_IOCON->P4_9 = 0x21;
LPC_IOCON->P4_10 = 0x21;
LPC_IOCON->P4_11 = 0x21;
LPC_IOCON->P4_12 = 0x21;
LPC_IOCON->P4_13 = 0x21;
LPC_IOCON->P4_14 = 0x21;
LPC_IOCON->P4_15 = 0x21;
LPC_IOCON->P5_0 = 0x21;

LPC_IOCON->P4_24 = 0x21;
LPC_IOCON->P4_25 = 0x21;

LPC_IOCON->P4_31 = 0x00;
LPC_GPIO4->DIR |= (1<<31);
LPC_GPIO4->SET |= (1<<31);
LPC_IOCON->P4_30 = 0x21;
//EMC_Init();
// Init SDRAM controller
LPC_SC->PCONP   |= 0x00000800;
LPC_SC->EMCDLYCTL |= (8<<0);
LPC_SC->EMCDLYCTL |=(8<<8);

LPC_SC->EMCDLYCTL |= (8<<16);

LPC_EMC->Control = 0x01;
LPC_EMC->Config = 0x00;
LPC_EMC->StaticExtendedWait = 0x00;
LPC_EMC->StaticConfig0 = 0x00;
LPC_EMC->StaticWaitWen0 = 0x01;
LPC_EMC->StaticWaitOen0 = 0x01;
LPC_EMC->StaticWaitRd0 = 0x01;
LPC_EMC->StaticWaitWr0 = 0x01;

}

Scatter file:

LR_IROM1 0x00000000 0x00080000  {    ; load region size_region
  ER_IROM1 0x00000000 0x00080000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }
  RW_IRAM1 0x10000000 0x00010000  {  ; RW data
   .ANY (+RW +ZI)
  }
  
  RW_IRAM2 0x20000000 0x00007FFF  {  ; RW data
.ANY (+RW +ZI)
  }
  
  RW_RAM1 0x80000000 UNINIT 0x02000000  {  ; RW data
   ;rsramTesr.o (.data)
   sramTesr.o (.bss)
   
  }
}

In sramTesr.cpp:

unsigned char sramData[50];

And main.cpp

u8 hello[] = "Hello!\r"; 
extern unsigned char sramData[50];

int main (void)
{
SystemInit();

/** uart for logs */
UartConfigType uartConfig;
uartConfig.baud = UART_BAUD_115200_PCKL_60MHZ;
uartConfig.parity = None;
uartConfig.numOfDataBits = 8;
uartConfig.numOfStopBits = 1;
uartConfig.useInterrupt = 1;
uartConfig.interruptHadler = userInterruptHandler;
uart.init (&uartConfig);

/**< init sram */
SRAMInit ();
/** waiting after init */
ngPlcTimerInit (200);
ngPlcTimerStart();
while (ngPlcTimerExpired() == 0);

/** placing data to sram */
for (u8 i = 0; i < 8; i++) 
{
sramData = hello;
}

/** reading data from sram */
for (u8 i=0; i<8; i++)
{
while (uart.readyToSend() == 0);
uart.sendChar (sramData); /** data in logs are wrong! */
}

while(1)
{
}
}

So I put data in sram, then read it and sent to UART. It's not working, data was not been written to sram. Pin WE not go low. What is wrong?

Regards

[lpcware]

Content originally posted in LPCWare by AkshayHV on Thu Jan 22 05:56:10 MST 2015
Hello,

I am also using a same connection you did for SRAM with LPC1788 but the WE pin i am using a GPIO which i am operating manually. but the when i write some data into my SRAM if i read from any position of SRAM the data which i am getting is the last byte i wrote into the SRAM.
Kindly revert back if you know the solution for this.


regards
Akshay H V

[lpcware]

Content originally posted in LPCWare by Dfcbkbq on Mon Sep 15 21:28:37 MST 2014
Thank you so much! It is really helped!

[lpcware]

Content originally posted in LPCWare by MikeSimmonds on Mon Sep 15 09:33:50 MST 2014
I think that you need to set bit 7 (PB) in the static config x register.
I.e

LPC_EMC->StaticConfig0 = 0x80;

Also do not set LPCEMC->Control to 1 until AFTER all the other settings.

For an expanation with wave form pictures, see the data sheet (not the user manual).

HTH, Mike

[lpcware]

Content originally posted in LPCWare by Dfcbkbq on Sun Sep 14 21:39:37 MST 2014
But there is no any SRAM example. Just only SDRAM, norflash and nandflash.

[lpcware]

Content originally posted in LPCWare by xianghuiwang on Fri Sep 12 17:45:04 MST 2014
Hi,

you can reference the emc sample code from below link:

http://www.lpcware.com/content/nxpfile/lpc177x-and-lpc178x-cmsis-compliant-standard-peripheral-firmw...

regards,