SPI transfer get stuck in mmc card interface

Anubhav Gupta

Expert 1130 points

Other Parts Discussed in Thread: CC2530

Hello Dear friends

I am interfacing with MMC card with CC2530 and used SPI on PORT0 at atlernate -1 position with USART1

when Debug code, I found that cursur keep waiting on SPI_WAIT_RXRDY0(); function in below SPI_Tranfer_Byte(0xFF);

my code for transferring data with mmc card is below :

unsigned char SPI_Transfer_Byte(unsigned char byte)
{
unsigned char received_byte=0x00;
//SPDR=byte;
SPI_TX0(byte);
//while(!(SPSR & (1<<SPIF)));
SPI_WAIT_RXRDY0();
received_byte=SPI_RX0();
return(received_byte);
}

Please help to resolve this issue urgently

thanks and regard

over 10 years ago

0 YiKai Chen over 10 years ago

Guru 735685 points

What is in your SPI_TX0 and SPI_WAIT_RXRDY0?

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

Hello gm friend

I have configure SPI-Master mode to communicate with MMC card with following information as below, but using D S Osilloscope no signal is seen on clock line, or MOSI line except chip select line

I have configured SPI- USART PORT -1 in master mode CC2530 with following pin

i)P0_2 as chip_select for mmc SPI_CHIP_SELCT

ii)P0_3 as serial clock SPI_CLOCK

iii)P0_4 as SPI_MOSI

iv) P0_5 as SPI_MISO

// USART1 Alt. 1 in SPI mode.

#define XNV_SPI_INIT() \
st( \
  /* Mode select UART1 SPI Mode as master. */\
  U1CSR = 0; \
  \
  /* Setup for 115200 baud. */\
  U1GCR = 11; \
  U1BAUD = 216; \
  \
  /* Set bit order to MSB */\
  U1GCR |= BV(5); \
  \
  /* Set UART1 I/O to alternate 2 location on P1 pins. */\
  PERCFG |= 0x0;        /* U1CFG */\
  \
  /* Select peripheral function on I/O pins but SS is left as GPIO for separate control. */\
  P0SEL |= 0x38;  /* SELP1_[5:2] */\
  
   
  P0DIR |= 0x04; \
  \
  /* Give UART1 priority over Timer3. */\
  P2SEL &= ~0x20;  /* PRI2P1 */\
  \
  /* When SPI config is complete, enable it. */\
  U1CSR |= 0x40; \
    
)

#define SPI_BEGIN0() st(P0_2 = 0;)
#define SPI_TX0(x) st(U1CSR &= ~0x02; U1DBUF = (x);)
#define SPI_RX0() U1DBUF
#define SPI_WAIT_RXRDY0() st(while (!(U1CSR & 0x02));)
#define SPI_END0() st(P0_2 = 1;)

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

So, it is copied from LCD driver and I see no problem on it. I suggest you use scope to check SPI signal.

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

using D S Osilloscope no signal is seen on clock line, or MOSI line except chip select line

0 Anubhav Gupta over 10 years ago in reply to Anubhav Gupta

Expert 1130 points

i have placed 33ohm resistance between CC2530 Micro controller and MMC card on all four SPI-commination line

0 Anubhav Gupta over 10 years ago in reply to Anubhav Gupta

Expert 1130 points

MMC card type is mentioned in below link

www.dx.com/.../spi-microsd-card-adapter-v0-9b-for-arduino-works-with-official-arduino-board-246784

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

If you don't see clock on clock line, you have to check this first. I suggest you disconnect your MMC module to check it again.

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

I had removed MMC card, and then checked signal on MOSI, Serial Clock Line, CHIP select.
only MOSI and CHIP select line have shown waveform and No waveform is observed on SCLK line yet
Please help in this regards
anubhav

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

Which pin of CC2530 do you use as SCLK?

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

I have configured SPI- USART PORT -1 in master mode CC2530 with following pin

i)P0_2 as chip_select for mmc SPI_CHIP_SELCT

ii)P0_3 as serial clock SPI_CLOCK

iii)P0_4 as SPI_MOSI

iv) P0_5 as SPI_MISO

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

Try to measure P1.5 for SCLK.

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

Although i check clock waveform on P1_5 but no waveform is observed ,

Although i am using Alternate-1 for USART-1 for SPI as per mentioned in datasheet of CC253XX in

and

PORT pin as

I have configured in master mode CC2530 with following pin

i)P0_2 as chip_select for mmc SPI_CHIP_SELCT

ii)P0_3 as serial clock SPI_CLOCK

iii)P0_4 as SPI_MOSI

iv) P0_5 as SPI_MISO

I am also posting snap shot of port config details taken from CC253XX.pdf datasheet

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

Try to use the following red part of XNV_SPI_INIT to replace yours.

#define XNV_SPI_INIT() \
st( \
  /* Mode select UART1 SPI Mode as master. */\
  U1CSR = 0; \
  \
  /* Setup for 115200 baud. */\
  U1GCR = 11; \
  U1BAUD = 216; \
  \
  /* Set bit order to MSB */\
  U1GCR |= BV(5); \
  \
  /* Set UART1 I/O to alternate 1 location on P0 pins. */\
  PERCFG &= (~BV(1));        /* U1CFG */\
  \
  /* Select peripheral function on I/O pins but SS is left as GPIO for separate control. */\
  P0SEL |= (BV(3)|BV(4)|BV(5));  /* SELP1_[5:2] */\
  P0SEL &= (~(BV(3)|BV(4)|BV(5))); \
 \ 
/* Give UART1 priority over Timer3. */\ 
  P2SEL &= ~0x20; /* PRI2P1 */\ \ 
/* When SPI config is complete, enable it. */\ 
U1CSR |= 0x40; \ )

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

I did configuration as per your suggestion, But observed that no MOSI waveform and no SERIAL_CLOCK waveform but earlier MOSI waveform was observed on Pin

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

Try to revise the red part to XNV_SPI_INIT.

#define XNV_SPI_INIT() \

st( \

/* Mode select UART1 SPI Mode as master. */\

U1CSR = 0; \

/* Setup for 115200 baud. */\

U1GCR = 11; \

U1BAUD = 216; \

/* Set bit order to MSB */\

U1GCR |= BV(5); \

/* Set UART1 I/O to alternate 1 location on P0 pins. */\

PERCFG &= (~BV(1)); /* U1CFG */\

/* Select peripheral function on I/O pins but SS is left as GPIO for separate control. */\

P0SEL |= (BV(3)|BV(4)|BV(5)); /* SELP1_[5:2] */\

P0SEL &= (~(BV(3)|BV(4)|BV(5))); \

P2DIR |= 0x40; /* 1st priority: USART 1 */\ \

/* Give UART1 priority over Timer3. */\

P2SEL &= ~0x20; /* PRI2P1=0 */\ \

P2SEL |= 0x40; /* PRI3P1=1 */\ \

/* When SPI config is complete, enable it. */\

U1CSR |= 0x40; \ )

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

Just test the following USART1 PORT0 SPI init function and confirm to see SCLK on P0.3.

#define USART1_SPI_INIT() \
st( \
/* Mode select UART1 SPI Mode as master. */\
U1CSR = 0; \
\
/* Setup for 115200 baud. */\
U1GCR = 11; \
U1BAUD = 216; \
\
/* Set bit order to MSB */\
U1GCR |= BV(5); \
\
/* Set UART1 I/O to location on P0 pins. */\
PERCFG &= (~BV(1)); /* U1CFG */\
\
/* Select peripheral function on I/O pins but SS is left as GPIO for separate control. */\
P0SEL |= (BV(3)|BV(4)|BV(5)); /* SELP1_[5:2] */\
/* P1.1,2,3: reset, LCD CS, XNV CS. */\
P2DIR |= 0x40; /* 1st priority: USART 1 */ \
\
/* Give UART1 priority over Timer3. */\
P2SEL &= ~0x20; /* PRI2P1 */\
P2SEL |= 0x40; /* PRI3P1=1 */\
\
/* When SPI config is complete, enable it. */\
U1CSR |= 0x40; \
/* Release XNV reset. */\
P1_1 = 1; \
)

0 Anubhav Gupta over 10 years ago

Expert 1130 points

hello
I have been able to do config part of SPI with USART1 ok, but now accessing MMC card with same SPI bus, as card is not responding
so am here stuck Please help to access MMC card

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

I still suggest you using scope to check if the SPI command is sent out correctly.

0 Anubhav Gupta over 10 years ago in reply to YiKai Chen

Expert 1130 points

it will be great help if you can provide MMC source code for interfacing with CC2530
thanks
Anubhav

0 YiKai Chen over 10 years ago in reply to Anubhav Gupta

Guru 735685 points

I only have experience on SPI to communicate with other HW not MMC so I don't have source code to you.

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SPI transfer get stuck in mmc card interface