STM32 and NAND flash ?

[antonius]

Posted on March 26, 2014 at 11:36

Guys,

Does R/B pin on Nand flash needed on the software ? I can't find R/B pin on GPIO definition, Anyone knows ? thanks #nand

[francescatodiego]

Posted on March 26, 2014 at 11:48

which device ?

STM32F4 support busy line in FSMC peripheral read RM0090 par. 36.6 Nand flash/PC card controller thebusy signal is called NWAIT for STM32F4 devices PD6  alternate function pin

[jpeacock2399]

Posted on March 26, 2014 at 14:45

Connect the Ready/Busy pin to an EXTI interrupt pin.  Use it to time long operations like block erase, where it generates an interrupt when the operation completes (busy to ready edge).  That way you can do something else while NAND is busy and not have to poll it.

  Jack Peacock

[antonius]

Posted on March 27, 2014 at 03:21 I'm using STM32F107 and NAND flash from samsung K9F1GXXX.... I can't see R/B pin on the code....so I don't know where I'm going to connect this pin to STM32 chip I have...... Or I just Ignore it ? Thanks Please have a look to the code :

void
FSMC_NAND_Init(
void
)

{

GPIO_InitTypeDef GPIO_InitStructure; 

FSMC_NANDInitTypeDef FSMC_NANDInitStructure;

FSMC_NAND_PCCARDTimingInitTypeDef p;


/* Enable FSMC, GPIOD, GPIOE and AFIO clocks */

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC, ENABLE);


RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | 

RCC_APB2Periph_GPIOG | RCC_APB2Periph_AFIO , ENABLE);


/*-- GPIO Configuration ------------------------------------------------------*/

/* CLE, ALE, D0->D3, NOE, NWE and NCE2 NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_14 | GPIO_Pin_15 | 

GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 | 

GPIO_Pin_7; 

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOD, &GPIO_InitStructure); 


/* D4->D7 NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;

GPIO_Init(GPIOE, &GPIO_InitStructure);


/* NWAIT NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOD, &GPIO_InitStructure); 


/* INT2 NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 

GPIO_Init(GPIOG, &GPIO_InitStructure);


/*-- FSMC Configuration ------------------------------------------------------*/

p.FSMC_SetupTime = 0xf1;

p.FSMC_WaitSetupTime = 0xf2;

p.FSMC_HoldSetupTime = 0xf3;

p.FSMC_HiZSetupTime = 0xf1;


FSMC_NANDInitStructure.FSMC_Bank = FSMC_Bank2_NAND;

FSMC_NANDInitStructure.FSMC_Waitfeature = FSMC_Waitfeature_Enable;

FSMC_NANDInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_8b;

FSMC_NANDInitStructure.FSMC_ECC = FSMC_ECC_Enable;

FSMC_NANDInitStructure.FSMC_ECCPageSize = FSMC_ECCPageSize_512Bytes;

FSMC_NANDInitStructure.FSMC_TCLRSetupTime = 0xa1;

FSMC_NANDInitStructure.FSMC_TARSetupTime = 0x15;

FSMC_NANDInitStructure.FSMC_CommonSpaceTimingStruct = &p;

FSMC_NANDInitStructure.FSMC_AttributeSpaceTimingStruct = &p;


FSMC_NANDInit(&FSMC_NANDInitStructure);


/* FSMC NAND Bank Cmd Test */

FSMC_NANDCmd(FSMC_Bank2_NAND, ENABLE);

}

[Tesla DeLorean]

Posted on March 27, 2014 at 03:39

READY/BUSY/WAIT - Many NAND drivers will spin on the GPIO read status.

[Tesla DeLorean]

Posted on March 27, 2014 at 03:45

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Page%20Read%20Problem%20with%20NAND%20Flash%20on%20STM32F2xx&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD065...

[antonius]

Posted on March 27, 2014 at 12:08

which one is R/B ?

I don't have PG6, could it be PD6 ? what's PG6 for then ?? I attached the schematic and Nand Flash chip datasheet, what do you reckon ? thanks

/* NWAIT NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOD, &GPIO_InitStructure);


/* INT2 NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 

GPIO_Init(GPIOG, &GPIO_InitStructure);

________________ Attachments : K9F1G08U0D.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0wq&d=%2Fa%2F0X0000000bg3%2F1snGM9FK.d3aGyQik0aCT9ESdK6HN.fzENTxZSRrVmc&asPdf=falseNandFlash_Board_A_.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0wl&d=%2Fa%2F0X0000000bfz%2FLrERvL_7wmWHy2O7_GS_DRzeiO.AG4.TfZAVdJQjOT4&asPdf=false

[Tesla DeLorean]

Posted on March 27, 2014 at 13:49

FFS it's the WAIT pin, in this case a GPIO Input on PD6, providing a BUSY (B) or READY (R) signal. It's presumably a GPIO because the signal is not sufficiently compatible with the FSMC, or that's it's not appropriate to stall the CPU waiting for a slow memory device.

The interrupt mode would only be appropriate if you have some stateful implementation

[Tesla DeLorean]

Posted on March 27, 2014 at 13:59

[antonius]

Posted on March 28, 2014 at 13:50

am I defining the pin on code into the board correctly ? Please have a look on the code :

/* CLE, ALE, D0->D3, NOE, NWE and NCE2 NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_14 | GPIO_Pin_15 | 

GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_4 | GPIO_Pin_5 | 

GPIO_Pin_7; 

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_Init(GPIOD, &GPIO_InitStructure); 


CLE = PD11

ALE = PD12

D0 = PD14

D1 = PD15

D2 = PD0

D3 = PD1

NOE = PD4 = RE ? <==On NAND Flash board

NWE = PD5 = WE ? <==On NAND Flash board

NCE2= PD7 = CE ? <==On NAND Flash board


/* D4->D7 NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;

GPIO_Init(GPIOE, &GPIO_InitStructure);


/* NWAIT NAND pin configuration */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; 

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_Init(GPIOD, &GPIO_InitStructure); 


D4 = PD7

D5 = PD8

D6 = PD9

D7 = PD10

NWAIT = PD6 = R_B ? <==On NAND Flash board