STM32F407VET6 SPI1 doesn't work PB3,PB4,PB5 and PA15

sheinv · ‎2013-05-24

Posted on May 25, 2013 at 00:54

Hi.

Please help. I write simple app using restricted KEIL to operate with AD5292 via SPI for my academic research project. To achive this I wrote the following code:

int main(void)

{

/*!< At this stage the microcontroller clock setting is already configured to

168 MHz, this is done through SystemInit() function which is called from

startup file (startup_stm32f4xx.s) before to branch to application main.

To reconfigure the default setting of SystemInit() function, refer to

system_stm32f4xx.c file

*/

GPIO_InitTypeDef GPIO_InitStruct;

SPI_InitTypeDef spi;

/*Enable or disable the AHB1 peripheral clock */

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//for SPI1

/** SPI1 GPIO Configuration

PA15 ------> SPI1_NSS

PB3 ------> SPI1_SCK

PB4 ------> SPI1_MISO

PB5 ------> SPI1_MOSI

*/

GPIO_StructInit(&GPIO_InitStruct);

GPIO_InitStruct.GPIO_Pin = GPIO_Speed_50MHz;

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_15;

GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;

GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;

GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource15, GPIO_AF_SPI1);

GPIO_InitStruct.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;

GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;

GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;

GPIO_Init(GPIOB, &GPIO_InitStruct);

GPIO_PinAFConfig(GPIOB, GPIO_PinSource3, GPIO_AF_SPI1);

GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_SPI1);

GPIO_PinAFConfig(GPIOB, GPIO_PinSource5, GPIO_AF_SPI1);

SPI_DeInit(SPI1);

SPI_StructInit(&spi);

spi.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

spi.SPI_Mode = SPI_Mode_Master;

spi.SPI_NSS = SPI_NSS_Soft;

spi.SPI_CPOL = SPI_CPOL_Low; //0

spi.SPI_CPHA = SPI_CPHA_2Edge; // 1

spi.SPI_DataSize = SPI_DataSize_16b;

spi.SPI_FirstBit = SPI_FirstBit_MSB;

spi.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;

SPI_Init(SPI1,&spi);

SPI_CalculateCRC(SPI1,DISABLE);

SPI_SSOutputCmd(SPI1, ENABLE);

SPI_Cmd(SPI1, ENABLE);

SPI_NSSInternalSoftwareConfig(SPI1, SPI_NSSInternalSoft_Set);

while(1)

{

while(SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE) == SET)

;

SPI_SendData(SPI1, 0x93);

while(SPI_GetFlagStatus(SPI1, SPI_FLAG_BSY) == SET)

;

}

But I can't see any signaling at the pins. I tried to check if these pins weren't damaged. I wrote small app to toggle pins manually via GPIO functions. All worked fine.

Thanks for any advices.

#stm32f407vet6-spi1-pb3-pb4-pb5

Tesla DeLorean · ‎2013-05-24

Posted on May 25, 2013 at 01:27

RCC_APB1PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//for SPI1

APB2 APB2 ...

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sheinv · ‎2013-05-25

Posted on May 25, 2013 at 09:56

Many thanks clive1 for your attention to my problem.

It was my mistake and if to say more precisely this was my misspell :) I tried many other variants before but without any success. :(

I corrected ABP1 with ABP2 but I still can't see any signaling at the pins. And only when I switched the mode of the pins to GPIO and wrote the code to toggle states of the pins I can see meander at them.

How do you think where can be the source of the problem?

Thanks for your correction and help.

sheinv · ‎2013-05-25

Posted on May 25, 2013 at 10:40

Thanks a lot, clive1!

The second problem was at the following line:

while(SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE) == SET)

the line should be

while(SPI_GetFlagStatus(SPI1, SPI_FLAG_TXE) == RESET)

Now everything is Ok.

Many many thanks!