Problem with SPI1

[erikszah]

Posted on September 14, 2008 at 20:29

Problem with SPI1

[erikszah]

Posted on May 17, 2011 at 12:45

Hi,

I am quite new to STM32 and I have a problem with SPI1. I have 2 boards with stm32 microcontrollers. On one board there is STM32F103RBT6, but on the other board STM32F103R6T6. So the problem. When I try to use SPI1 it doesn't work on both boards but the board with STM32F103RBT6 has 2 SPIs and SPI2 is working fine. That SPI1 stucks in

while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE)==RESET);

What is the problem?

My SPI1 configs:

GPIO_InitTypeDef GPIO_InitStructure;

SPI_InitTypeDef SPI_InitStructure;

/* GPIOA and GPIOC Periph clock enable */

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

/* SPI1 Periph clock enable */

RCC_APB1PeriphClockCmd(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 PA4 pin: CS pin */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/* SPI1 Config */

SPI_I2S_DeInit(SPI1);

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_8;

SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

SPI_InitStructure.SPI_CRCPolynomial = 7;

SPI_Init(SPI1, &SPI_InitStructure);

/* SPI1 enable */

SPI_Cmd(SPI1, ENABLE);

Thanks!

Erik

[erikszah]

Posted on May 17, 2011 at 12:45

These controllers are from 'Performance line'.

So what is the solution to this problem? I cannot find any other way to check this flag.

Erik

[ This message was edited by: erikszah on 14-09-2008 23:42 ]

[jj_it]

Posted on May 17, 2011 at 12:45

Both of your devices are, ''medium density'' - these do not support I2S flavor of SPI.

I note that you are using full-duplex - suggest that you temporarily use a simpler application - to see if you can first get it to work.

um0427/FWLib/examples/SPI/Simplex_Interrupt/main.c

Use this code which is simpler and see if this works. Note that you must #define SPI_Mode_Select so that I2S mode is not chosen. Give this a try

[ This message was edited by: jj.sprague on 14-09-2008 23:57 ]

[jj_it]

Posted on May 17, 2011 at 12:45

Please try my suggestion (edited in my earlier post). Good luck.