STM32F030C6 problem SPI comunication

[u23]

Posted on September 04, 2014 at 10:07

Hi,

the my problem is comunication with SPI. The configuration SPI is following: /* Private define ------------------------------------------------------------*/     /* Uncomment the size of data to be transmetted (only one data size must be selected) */     #define SPI_DATASIZE                     SPI_DataSize_8b     #define SPIx                                        SPI1     #define SPIx_CLK                             RCC_APB2Periph_SPI1     #define SPIx_IRQn                            SPI1_IRQn     #define SPIx_IRQHandler                 SPI1_IRQHandler     #define SPIx_SCK_PIN                     GPIO_Pin_13   #define SPIx_SCK_GPIO_PORT        GPIOB   #define SPIx_SCK_GPIO_CLK          RCC_AHBPeriph_GPIOB   #define SPIx_SCK_SOURCE              GPIO_PinSource13   #define SPIx_SCK_AF                         GPIO_AF_0   #define SPIx_MISO_PIN                    GPIO_Pin_14   #define SPIx_MISO_GPIO_PORT     GPIOB   #define SPIx_MISO_GPIO_CLK        RCC_AHBPeriph_GPIOB   #define SPIx_MISO_SOURCE            GPIO_PinSource14   #define SPIx_MISO_AF                       GPIO_AF_0   #define SPIx_MOSI_PIN                    GPIO_Pin_15   #define SPIx_MOSI_GPIO_PORT     GPIOB   #define SPIx_MOSI_GPIO_CLK       RCC_AHBPeriph_GPIOB   #define SPIx_MOSI_SOURCE           GPIO_PinSource15   #define SPIx_MOSI_AF                      GPIO_AF_0   #define SPIx_NSS_PIN                       GPIO_Pin_12   #define SPIx_NSS_GPIO_PORT       GPIOB   #define SPIx_NSS_GPIO_CLK         RCC_AHBPeriph_GPIOB   #define SPIx_NSS_SOURCE             GPIO_PinSource12   #define SPIx_NSS_AF                        GPIO_AF_0 void spiInit() {   GPIO_InitTypeDef GPIO_InitStructure;     SPI_InitTypeDef  SPI_InitStructure;   /* Enable the SPI peripheral */   RCC_APB2PeriphClockCmd(SPIx_CLK, ENABLE);     /* Enable SCK, MOSI, MISO and NSS GPIO clocks */   RCC_AHBPeriphClockCmd(SPIx_SCK_GPIO_CLK | SPIx_MISO_GPIO_CLK | SPIx_MOSI_GPIO_CLK |                         SPIx_NSS_GPIO_CLK , ENABLE);     /* SPI pin mappings */   GPIO_PinAFConfig(SPIx_SCK_GPIO_PORT, SPIx_SCK_SOURCE, SPIx_SCK_AF);   GPIO_PinAFConfig(SPIx_MOSI_GPIO_PORT, SPIx_MOSI_SOURCE, SPIx_MOSI_AF);   GPIO_PinAFConfig(SPIx_MISO_GPIO_PORT, SPIx_MISO_SOURCE, SPIx_MISO_AF);   GPIO_PinAFConfig(SPIx_NSS_GPIO_PORT, SPIx_NSS_SOURCE, SPIx_NSS_AF);     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;   GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;   /* SPI SCK pin configuration */   GPIO_InitStructure.GPIO_Pin = SPIx_SCK_PIN;   GPIO_Init(SPIx_SCK_GPIO_PORT, &GPIO_InitStructure);   /* SPI  MOSI pin configuration */   GPIO_InitStructure.GPIO_Pin =  SPIx_MOSI_PIN;   GPIO_Init(SPIx_MOSI_GPIO_PORT, &GPIO_InitStructure);   /* SPI MISO pin configuration */   GPIO_InitStructure.GPIO_Pin = SPIx_MISO_PIN;   GPIO_Init(SPIx_MISO_GPIO_PORT, &GPIO_InitStructure);     /* SPI NSS pin configuration */   GPIO_InitStructure.GPIO_Pin = SPIx_NSS_PIN;   GPIO_Init(SPIx_NSS_GPIO_PORT, &GPIO_InitStructure);     /* SPI configuration -------------------------------------------------------*/   SPI_I2S_DeInit(SPIx);   SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;   SPI_InitStructure.SPI_Mode = SPI_Mode_Master;   SPI_InitStructure.SPI_DataSize = SPI_DATASIZE;   SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;   SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;   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;   /* Initializes the SPI communication */   SPI_Init(SPIx, &SPI_InitStructure);   /* Enable the SPI peripheral */   SPI_Cmd(SPIx, ENABLE); } I ask you if this configuration is correct! The use the SPI for comunication EEPROM with the following schematic:   Thanks

[Tesla DeLorean]

Posted on September 04, 2014 at 11:16

The Input/Output sense seems backward. Wouldn't MOSI need to go to SI?

[u23]

Posted on September 04, 2014 at 14:09

Exact!

I invert the pins and verify the source code!    Thanks

[u23]

Posted on September 04, 2014 at 16:23

I eliminated the EEPROM device in schematic.

I send the char with SPI and monitoring the signal in output from microcontroller. SSI_CLK --> is low; CS_EEPROM  --> is  low for 100 ms (

duration

of

transmission of the

given

)

then

back high for 500 ms;

SSI_DIN --> is low. T

he executed code is

the following:

int main(void) {     uint8_t Dato = 0xAA;     /* Initialize the SPI EEPROM driver ----------------------------------------*/     spiInit();     /* Infinite loop */   while (1)   {                          SPI_SSOutputCmd(SPIx,ENABLE);                          /*!< Send WriteAddr address byte to write to */             SPI_SendData8(SPI1, Dato);             Delay(100);                   

            SPI_SSOutputCmd(SPIx,DISABLE); 

                         Delay(500);    } } Why the CLK signal is absent? Help me!

[u23]

Posted on September 09, 2014 at 10:12 The original post was too long to process during our migration. Please click on the provided URL to read the original post. https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I6XM&d=%2Fa%2F0X0000000bqB%2FQtZP9P3zRxCC.cNnFgEO27ptJQ5J5iQZ3gW.Qa50CSk&asPdf=false