STM32F4 Discovery FATFS SPI2 problem

[dawidos145]

Posted on October 09, 2016 at 21:54

Hi everyone, i have problem with a something project, i dont have comunication with microsd card on my board,  my debug stay on function wait ready and next rcvr_spi(), and nothing to do ;/ i dont know where is problem,

i paste my configuration. my connect : CS - PE15, SCK - PB13, MISO PB14, MOSI PB15, i use coocox for comiple and debugMAIN[code]int main( void ){    SystemInit();     SPI_SD_Init();        fresult = f_mount( 0, &fatfs);        fresult = f_open( &plik, ''demo.wav'', FA_OPEN_EXISTING | FA_READ );        if( fresult == FR_OK )        {        //fresult = f_read(&plik, void * buffor, 17, &zapisanych_bajtow);        fresult = f_read( &plik, ( void * ) buffor2, 112940, &odczytanych_bajtow );        }        fresult = f_close( &plik );}[/code]SPI_SD[code]void SPI_SD_Init( void )  //inicialize spi{ GPIO_InitTypeDef  GPIO_InitStructure; SPI_InitTypeDef   SPI_InitStructure; volatile BYTE dummyread;  // Konfiguracja wyprowadzen i kontrolera SPI:config output spi /* Enable GPIO clock for CS */    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);    /* Enable SPI clock, SPI2 */  // Wlaczenie sygnalow zegarowych dla peryferiowclock for peripherials  RCC_APB1PeriphClockCmd( RCC_APB1Periph_SPI2, ENABLE);  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE );  GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2 );   GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);   GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2 );  // PE15 CS  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;  GPIO_Init(GPIOE, &GPIO_InitStructure);  DESELECT_SD();  //SCK, MISO and MOSI SD  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;  GPIO_Init(GPIOB, &GPIO_InitStructure);  // Konfiguracja SPI enable spi  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; // low ?  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;  SPI_InitStructure.SPI_CRCPolynomial = 7;  SPI_Init(SPI2, &SPI_InitStructure);  // Wlacz SPI  SPI_Cmd(SPI2, ENABLE);   while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET) { ; }    dummyread = SPI_ReceiveData(SPI2);}[/code]ODEBRANIE BAJTU I WYSLANIE[code]staticvoid xmit_spi (uint8_t outB)  // Wyslanie bajtu do SPI{ u8 Data = 0; while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); SPI_I2S_SendData(SPI2, Data);}staticBYTE rcvr_spi (void) // Odebranie bajtu z SPI{ u8 Data = 0; // Wysłanie 0xFF while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); SPI_I2S_SendData(SPI2, 0xFF); // odebranie bajtu while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); Data = SPI_I2S_ReceiveData(SPI2); return Data;}staticBYTE wait_ready (void){    BYTE res;    Timer2 = 50;    /* Wait for ready in timeout of 500ms */    rcvr_spi();    do        res = rcvr_spi();    while ((res != 0xFF) && Timer2);    return res;}[/code][code]staticvoid power_on (void){ u8 i, cmd_arg[6]; u32 Count = 0xFFF;  // Inicjalizacja karty i przelaczenie w tryb SPI:    DESELECT_SD();        // CS = 1     for (i = 0; i < 10; i++)            xmit_spi(0xFF);    // Wyslij 0xFF 10 razy = 80 cykli zegarowych                // (wymaganych co najmniej 74 cykli)     SELECT_SD();        // CS = 0      // Przygotowanie ramki inicjujacej do wyslania      cmd_arg[0] = (CMD0 | 0x40);      cmd_arg[1] = 0;    // Argument komendy      cmd_arg[2] = 0;    // nawet, gdy komenda go nie ma      cmd_arg[3] = 0;    // musi zostac wyslany w postaci zer      cmd_arg[4] = 0;      cmd_arg[5] = 0x95;    // CRC = 0x95      for (i = 0; i < 6; i++)        // Wyslanie ramki            xmit_spi(cmd_arg[i]);      while ((rcvr_spi() != 0x01) && Count) // Czeka na 0x01            Count--;      DESELECT_SD();        // CS = 1      xmit_spi( 0XFF );    // Wyslij 0xFF      PowerFlag = 1;}[/code][/code]

[Tesla DeLorean]

Posted on October 10, 2016 at 01:05

You configure PE12 not PE15

There doesn't appear to be any timeout counter/interrupt implemented, so it won't leave the loop. You might want to instrument the code to see what comes back, and review that in the context of the MMC/SD Card protocol documentation.

[dawidos145]

Posted on October 18, 2016 at 18:30thank you for answer, im beginner user, but i must do this for project.. can you help me ? im dont know where is problem, i change to PE15 but still stay on :if ((SPIx->SR & SPI_I2S_FLAG) != (uint16_t)RESET) , and bistatus have always RESET

[Tesla DeLorean]

Posted on October 18, 2016 at 21:04

can you help me ?

I've provided SDIO examples for the STM32F4-DISCO board, unfortunately I can't expend my resources on debugging your code. If the bits are always zero one might double check the peripheral clocks, but don't look at the SPI2 peripheral through a Peripheral View in the debugger, it will break/clear bits. The debugger can be very invasive at a peripheral level.

[dawidos145]

Posted on October 23, 2016 at 19:45

At this moment i dont know..i do this everythin... i have on board only pull up resisotr on CS PIN 10K to 3.3 V. 

When i call function fresult = f_mount  i back FR_OK but when i call fresult = f_open i have problem on function rcvr_spi() and next still stay on function wait_ready and line '' while ((res != 0xFF) && Timer2); ''when i call function before f_mount and f_open i havefresult = disk_initialize()  -> FR_DISK_ERRfresult = disk_read() -> FR_NO_FILEand when i call only function disk_initialize(0) he still stay always ''while ((res != 0xFF) && Timer2);''

[Tesla DeLorean]

Posted on October 23, 2016 at 21:41

I would recommend fully validating the SPI/SD layer reads and writes before layering FATFS on top.