Question for STM32 USB Full Speed Device Library V2.2.1
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‎2013-09-05 05:11 PM
Posted on September 06, 2013 at 02:11
Hello guys,
I have a question for : Question for STM32 USB Full Speed Device Library V2.2.1 How can I use SD card on Mass_storage demos ? is it connected via SPI or SDIO ? or I can choose ? and how can I connect my USB to it ? where can I find the configuration for it ? I have PA11 and PA12 connected to USB port. Thanks a lot
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‎2013-09-13 08:32 AM
Posted on September 13, 2013 at 17:32 Is it possible for me using SPI interface ? I saw : /******************************************************************************* * Function Name : SPI_Config * Description : Initializes the SPI1 and CS pins. * Input : None * Output : None * Return : None *******************************************************************************/ void SPI_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; /* GPIOA and GPIOC Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC, ENABLE); /* SPI1 Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); /* Configure SPI1 pins: SCK, MISO and MOSI */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure PC12 pin: CS pin */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); /* SPI1 Config */ 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; 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(SPI1, &SPI_InitStructure); /* SPI1 enable */ SPI_Cmd(SPI1, ENABLE); } on UM0424\USBLib\Demos\Mass_Storage\Project\RVMDK\.....\msd.c
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‎2013-09-13 08:43 AM
Posted on September 13, 2013 at 17:43
Is it possible for me using SPI interface ?
There are opportunities to do it many ways, you'll need to figure out what's appropriate for you, or try some existing boards/solutions to see it work. I would recommend implementing and testing the card reading code independently of USB, and then reintegrate the two. Tackle the problem in small bites so you don't choke.
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‎2013-09-26 06:48 AM
Posted on September 26, 2013 at 15:48
so try using SPI then connect via UART as my interface ?
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‎2013-09-26 08:17 AM
Posted on September 26, 2013 at 17:17
Or just write a test app to exercise the SDCard via SPI, you could output diagnostic information via USART, SWV or LEDs as required.
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