Hi, I'm trying to read JEDEC from my serial FLASH, but I keep getting
wrong id. I tested LLB and MISO/MOSI hard loop, both get me proper
data. Can somebody enlight me where I'm making mistake? This is my
code:
PMC_EnablePeripheral(AT91C_ID_PIOA); //turn on PIOA
peripheral
PIO_Configure(spi_pins, PIO_LISTSIZE(spi_pins)); //conf
MISO,MOSI,SPCK,NPCS
PMC_EnablePeripheral(AT91C_ID_SPI0); //turn on SPI0
//conf SPI: master mode, mode fault disabled, PS_FIXED and set PCS,
DLYBCS
SPI_Configure(AT91C_BASE_SPI0,AT91C_ID_SPI0,AT91C_SPI_MSTR |
AT91C_SPI_MODFDIS|
AT91C_SPI_PS_FIXED|
AT91C_SPI_PCS|
AT91C_SPI_DLYBCS);
//conf NPCS: CPHA=1, CSAAT=1, SCBR=0x30 for 1MHz, DLYBS, DLYBCT
SPI_ConfigureNPCS(AT91C_BASE_SPI0,0,
AT91C_SPI_NCPHA|
AT91C_SPI_CSAAT|
AT91C_SPI_SCBR|
AT91C_SPI_DLYBS|
AT91C_SPI_DLYBCT);
while(1)
{
SPI_Enable(AT91C_BASE_SPI0); //enable SPI
//send data to SPI0, PCS=0, data=0x9F -> get JEDEC ID
SPI_Write(AT91C_BASE_SPI0,0,0x9F);
/* Send data
//wait for tx to be empty
while ((spi->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
spi->SPI_TDR = data | AT91C_SPI_PCS;
//wait for tx end
while ((spi->SPI_SR & AT91C_SPI_ENDTX) == 0);*/
//read manufact byte
spi_buff[0]=SPI_Read(AT91C_BASE_SPI0);
/*Read data
//data have been recived?
while ((spi->SPI_SR & AT91C_SPI_RDRF) == 0);
return spi->SPI_RDR & 0xFFFF;*/
//write dummy byte
SPI_Write(AT91C_BASE_SPI0,0,0);
//get device id part 1
spi_buff[1]=SPI_Read(AT91C_BASE_SPI0);
//write dummy byte
SPI_Write(AT91C_BASE_SPI0,0,0);
//get device id part 2
spi_buff[2]=SPI_Read(AT91C_BASE_SPI0);
SPI_Disable(AT91C_BASE_SPI0); //disable SPI
}
}
I get 0x0028F1FF instead of 0x003016EF. ;/
[at91sam7x256] Problem with connecting serial FLASH using SPI
Started by ●August 19, 2008
Reply by ●August 19, 20082008-08-19
Which mode SPI mode is your serial FLASH ?
Mode 0,1,2,or 3?
(http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus).
Look like you are using Mode 1.
You have to configure your NPCS to the right mode to the serial flash.
_____
From: A... [mailto:A...] On Behalf Of
dawido85
Sent: 19 August 2008 16:17
To: A...
Subject: [AT91SAM] [at91sam7x256] Problem with connecting serial FLASH using
SPI
Hi, I'm trying to read JEDEC from my serial FLASH, but I keep getting
wrong id. I tested LLB and MISO/MOSI hard loop, both get me proper
data. Can somebody enlight me where I'm making mistake? This is my
code:
PMC_EnablePeripheral(AT91C_ID_PIOA); //turn on PIOA
peripheral
PIO_Configure(spi_pins, PIO_LISTSIZE(spi_pins)); //conf
MISO,MOSI,SPCK,NPCS
PMC_EnablePeripheral(AT91C_ID_SPI0); //turn on SPI0
//conf SPI: master mode, mode fault disabled, PS_FIXED and set PCS,
DLYBCS
SPI_Configure(AT91C_BASE_SPI0,AT91C_ID_SPI0,AT91C_SPI_MSTR |
AT91C_SPI_MODFDIS|
AT91C_SPI_PS_FIXED|
AT91C_SPI_PCS|
AT91C_SPI_DLYBCS);
//conf NPCS: CPHA=1, CSAAT=1, SCBR=0x30 for 1MHz, DLYBS, DLYBCT
SPI_ConfigureNPCS(AT91C_BASE_SPI0,0,
AT91C_SPI_NCPHA|
AT91C_SPI_CSAAT|
AT91C_SPI_SCBR|
AT91C_SPI_DLYBS|
AT91C_SPI_DLYBCT);
while(1)
{
SPI_Enable(AT91C_BASE_SPI0); //enable SPI
//send data to SPI0, PCS=0, data=0x9F -> get JEDEC ID
SPI_Write(AT91C_BASE_SPI0,0,0x9F);
/* Send data
//wait for tx to be empty
while ((spi->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
spi->SPI_TDR = data | AT91C_SPI_PCS;
//wait for tx end
while ((spi->SPI_SR & AT91C_SPI_ENDTX) == 0);*/
//read manufact byte
spi_buff[0]=SPI_Read(AT91C_BASE_SPI0);
/*Read data
//data have been recived?
while ((spi->SPI_SR & AT91C_SPI_RDRF) == 0);
return spi->SPI_RDR & 0xFFFF;*/
//write dummy byte
SPI_Write(AT91C_BASE_SPI0,0,0);
//get device id part 1
spi_buff[1]=SPI_Read(AT91C_BASE_SPI0);
//write dummy byte
SPI_Write(AT91C_BASE_SPI0,0,0);
//get device id part 2
spi_buff[2]=SPI_Read(AT91C_BASE_SPI0);
SPI_Disable(AT91C_BASE_SPI0); //disable SPI
}
}
I get 0x0028F1FF instead of 0x003016EF. ;/
Mode 0,1,2,or 3?
(http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus).
Look like you are using Mode 1.
You have to configure your NPCS to the right mode to the serial flash.
_____
From: A... [mailto:A...] On Behalf Of
dawido85
Sent: 19 August 2008 16:17
To: A...
Subject: [AT91SAM] [at91sam7x256] Problem with connecting serial FLASH using
SPI
Hi, I'm trying to read JEDEC from my serial FLASH, but I keep getting
wrong id. I tested LLB and MISO/MOSI hard loop, both get me proper
data. Can somebody enlight me where I'm making mistake? This is my
code:
PMC_EnablePeripheral(AT91C_ID_PIOA); //turn on PIOA
peripheral
PIO_Configure(spi_pins, PIO_LISTSIZE(spi_pins)); //conf
MISO,MOSI,SPCK,NPCS
PMC_EnablePeripheral(AT91C_ID_SPI0); //turn on SPI0
//conf SPI: master mode, mode fault disabled, PS_FIXED and set PCS,
DLYBCS
SPI_Configure(AT91C_BASE_SPI0,AT91C_ID_SPI0,AT91C_SPI_MSTR |
AT91C_SPI_MODFDIS|
AT91C_SPI_PS_FIXED|
AT91C_SPI_PCS|
AT91C_SPI_DLYBCS);
//conf NPCS: CPHA=1, CSAAT=1, SCBR=0x30 for 1MHz, DLYBS, DLYBCT
SPI_ConfigureNPCS(AT91C_BASE_SPI0,0,
AT91C_SPI_NCPHA|
AT91C_SPI_CSAAT|
AT91C_SPI_SCBR|
AT91C_SPI_DLYBS|
AT91C_SPI_DLYBCT);
while(1)
{
SPI_Enable(AT91C_BASE_SPI0); //enable SPI
//send data to SPI0, PCS=0, data=0x9F -> get JEDEC ID
SPI_Write(AT91C_BASE_SPI0,0,0x9F);
/* Send data
//wait for tx to be empty
while ((spi->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
spi->SPI_TDR = data | AT91C_SPI_PCS;
//wait for tx end
while ((spi->SPI_SR & AT91C_SPI_ENDTX) == 0);*/
//read manufact byte
spi_buff[0]=SPI_Read(AT91C_BASE_SPI0);
/*Read data
//data have been recived?
while ((spi->SPI_SR & AT91C_SPI_RDRF) == 0);
return spi->SPI_RDR & 0xFFFF;*/
//write dummy byte
SPI_Write(AT91C_BASE_SPI0,0,0);
//get device id part 1
spi_buff[1]=SPI_Read(AT91C_BASE_SPI0);
//write dummy byte
SPI_Write(AT91C_BASE_SPI0,0,0);
//get device id part 2
spi_buff[2]=SPI_Read(AT91C_BASE_SPI0);
SPI_Disable(AT91C_BASE_SPI0); //disable SPI
}
}
I get 0x0028F1FF instead of 0x003016EF. ;/
Reply by ●August 19, 20082008-08-19
According to atmel:
http://support.atmel.no/bin/customer?=&action=viewKbEntry&id6
I'm setting NCPHA=1 -> CPHA=0 and it's mode 0. Sorry for typo in my
previous post. My serial FLASH operate with mode 0 or 3, so I guess
mode config is ok.
Thanks for reply.
--- In A..., "hlow" wrote:
>
> Which mode SPI mode is your serial FLASH ?
>
> Mode 0,1,2,or 3?
>
>
>
> (http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus).
>
>
>
> Look like you are using Mode 1.
>
> You have to configure your NPCS to the right mode to the serial
flash.
>
>
>
>
>
> _____
>
> From: A... [mailto:A...] On
Behalf Of
> dawido85
> Sent: 19 August 2008 16:17
> To: A...
> Subject: [AT91SAM] [at91sam7x256] Problem with connecting serial
FLASH using
> SPI
>
>
>
> Hi, I'm trying to read JEDEC from my serial FLASH, but I keep
getting
> wrong id. I tested LLB and MISO/MOSI hard loop, both get me proper
> data. Can somebody enlight me where I'm making mistake? This is my
> code:
>
> PMC_EnablePeripheral(AT91C_ID_PIOA); //turn on PIOA
> peripheral
> PIO_Configure(spi_pins, PIO_LISTSIZE(spi_pins)); //conf
> MISO,MOSI,SPCK,NPCS
> PMC_EnablePeripheral(AT91C_ID_SPI0); //turn on SPI0
>
> //conf SPI: master mode, mode fault disabled, PS_FIXED and set PCS,
> DLYBCS
> SPI_Configure(AT91C_BASE_SPI0,AT91C_ID_SPI0,AT91C_SPI_MSTR |
> AT91C_SPI_MODFDIS|
> AT91C_SPI_PS_FIXED|
> AT91C_SPI_PCS|
> AT91C_SPI_DLYBCS);
>
> //conf NPCS: CPHA=1, CSAAT=1, SCBR=0x30 for 1MHz, DLYBS, DLYBCT
> SPI_ConfigureNPCS(AT91C_BASE_SPI0,0,
> AT91C_SPI_NCPHA|
> AT91C_SPI_CSAAT|
> AT91C_SPI_SCBR|
> AT91C_SPI_DLYBS|
> AT91C_SPI_DLYBCT);
> while(1)
> {
>
> SPI_Enable(AT91C_BASE_SPI0); //enable SPI
>
> //send data to SPI0, PCS=0, data=0x9F -> get JEDEC ID
> SPI_Write(AT91C_BASE_SPI0,0,0x9F);
>
> /* Send data
> //wait for tx to be empty
> while ((spi->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
> spi->SPI_TDR = data | AT91C_SPI_PCS;
> //wait for tx end
> while ((spi->SPI_SR & AT91C_SPI_ENDTX) == 0);*/
>
> //read manufact byte
> spi_buff[0]=SPI_Read(AT91C_BASE_SPI0);
>
> /*Read data
> //data have been recived?
> while ((spi->SPI_SR & AT91C_SPI_RDRF) == 0);
> return spi->SPI_RDR & 0xFFFF;*/
>
> //write dummy byte
> SPI_Write(AT91C_BASE_SPI0,0,0);
> //get device id part 1
> spi_buff[1]=SPI_Read(AT91C_BASE_SPI0);
>
> //write dummy byte
> SPI_Write(AT91C_BASE_SPI0,0,0);
> //get device id part 2
> spi_buff[2]=SPI_Read(AT91C_BASE_SPI0);
>
> SPI_Disable(AT91C_BASE_SPI0); //disable SPI
> }
> }
>
> I get 0x0028F1FF instead of 0x003016EF. ;/
>
http://support.atmel.no/bin/customer?=&action=viewKbEntry&id6
I'm setting NCPHA=1 -> CPHA=0 and it's mode 0. Sorry for typo in my
previous post. My serial FLASH operate with mode 0 or 3, so I guess
mode config is ok.
Thanks for reply.
--- In A..., "hlow" wrote:
>
> Which mode SPI mode is your serial FLASH ?
>
> Mode 0,1,2,or 3?
>
>
>
> (http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus).
>
>
>
> Look like you are using Mode 1.
>
> You have to configure your NPCS to the right mode to the serial
flash.
>
>
>
>
>
> _____
>
> From: A... [mailto:A...] On
Behalf Of
> dawido85
> Sent: 19 August 2008 16:17
> To: A...
> Subject: [AT91SAM] [at91sam7x256] Problem with connecting serial
FLASH using
> SPI
>
>
>
> Hi, I'm trying to read JEDEC from my serial FLASH, but I keep
getting
> wrong id. I tested LLB and MISO/MOSI hard loop, both get me proper
> data. Can somebody enlight me where I'm making mistake? This is my
> code:
>
> PMC_EnablePeripheral(AT91C_ID_PIOA); //turn on PIOA
> peripheral
> PIO_Configure(spi_pins, PIO_LISTSIZE(spi_pins)); //conf
> MISO,MOSI,SPCK,NPCS
> PMC_EnablePeripheral(AT91C_ID_SPI0); //turn on SPI0
>
> //conf SPI: master mode, mode fault disabled, PS_FIXED and set PCS,
> DLYBCS
> SPI_Configure(AT91C_BASE_SPI0,AT91C_ID_SPI0,AT91C_SPI_MSTR |
> AT91C_SPI_MODFDIS|
> AT91C_SPI_PS_FIXED|
> AT91C_SPI_PCS|
> AT91C_SPI_DLYBCS);
>
> //conf NPCS: CPHA=1, CSAAT=1, SCBR=0x30 for 1MHz, DLYBS, DLYBCT
> SPI_ConfigureNPCS(AT91C_BASE_SPI0,0,
> AT91C_SPI_NCPHA|
> AT91C_SPI_CSAAT|
> AT91C_SPI_SCBR|
> AT91C_SPI_DLYBS|
> AT91C_SPI_DLYBCT);
> while(1)
> {
>
> SPI_Enable(AT91C_BASE_SPI0); //enable SPI
>
> //send data to SPI0, PCS=0, data=0x9F -> get JEDEC ID
> SPI_Write(AT91C_BASE_SPI0,0,0x9F);
>
> /* Send data
> //wait for tx to be empty
> while ((spi->SPI_SR & AT91C_SPI_TXEMPTY) == 0);
> spi->SPI_TDR = data | AT91C_SPI_PCS;
> //wait for tx end
> while ((spi->SPI_SR & AT91C_SPI_ENDTX) == 0);*/
>
> //read manufact byte
> spi_buff[0]=SPI_Read(AT91C_BASE_SPI0);
>
> /*Read data
> //data have been recived?
> while ((spi->SPI_SR & AT91C_SPI_RDRF) == 0);
> return spi->SPI_RDR & 0xFFFF;*/
>
> //write dummy byte
> SPI_Write(AT91C_BASE_SPI0,0,0);
> //get device id part 1
> spi_buff[1]=SPI_Read(AT91C_BASE_SPI0);
>
> //write dummy byte
> SPI_Write(AT91C_BASE_SPI0,0,0);
> //get device id part 2
> spi_buff[2]=SPI_Read(AT91C_BASE_SPI0);
>
> SPI_Disable(AT91C_BASE_SPI0); //disable SPI
> }
> }
>
> I get 0x0028F1FF instead of 0x003016EF. ;/
>
