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SPI

Hi everyone

I am using stm32f051. I have to send data through SPI1 into DAC081S101. there is no output in the output of the DAC081S101. similarly an error in the MSB of the MOSI output. The code is given below.

#include <stdio.h>
#include "stm32f0xx.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_it.h"
#include "stm32f0xx_rcc.h"

#include "stm32f0xx_usart.h"
#include "stm32f0xx_conf.h"
#include "stm32f0xx_adc.h"
#include "stm32f0xx_i2c.h"

#include "math.h"
#include "string.h"
#include "main.h"

#include "main.h"

void spiInit(void);

void spiInit()
{ SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB ,ENABLE); RCC_APB2PeriphClockCmd (RCC_APB2Periph_SPI1, ENABLE);

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_Low; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Hard; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;//32 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7;

///////////////////////////////////////////////////////////////////////////// // SPI1 Master initialization, SCK -> PA5, MOSI -> PA7 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; //PuPd_UP GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_0); GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_0);

// MISO -> PA6 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_0);

// CS or SS chip select -> PA4 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; GPIO_Init(GPIOA, &GPIO_InitStructure);

// SPI1 SPI_Init(SPI1, &SPI_InitStructure); SPI_RxFIFOThresholdConfig(SPI1, SPI_RxFIFOThreshold_QF); SPI_SSOutputCmd(SPI1,ENABLE); SPI_Cmd(SPI1, ENABLE);

}

void ChipSelectLow()
{ GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
}

void ChipSelectHigh ()
{ GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_SET);
}

uint8_t SPI1_send(uint8_t data){

SPI1->DR = data; // write data to be transmitted to the SPI data register while( !(SPI1->SR & SPI_I2S_FLAG_TXE) ); // wait until transmit complete while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete while( SPI1->SR & SPI_I2S_FLAG_BSY ); // wait until SPI is not busy anymore return SPI1->DR; // return received data from SPI data register
}

int main()
{ while (1) { spiInit();

ChipSelectHigh (); ChipSelectLow (); SPI_SendData8(SPI1 , 0x55); while( !(SPI1->SR & SPI_I2S_FLAG_TXE) ); // wait until transmit complete while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete while( SPI1->SR & SPI_I2S_FLAG_BSY ); // wait until SPI is not busy anymore ChipSelectHigh (); }

}

Parents

0 sneha shairak over 7 years ago in reply to Andy Neil

#include <stdio.h>
#include "stm32f0xx.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_it.h"
#include "stm32f0xx_rcc.h"

#include "stm32f0xx_usart.h"
#include "stm32f0xx_conf.h"
#include "stm32f0xx_adc.h"
#include "stm32f0xx_i2c.h"

#include "math.h"
#include "string.h"
#include "main.h"

#include "main.h"

void spiInit(void);

void spiInit()
{ SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB ,ENABLE); RCC_APB2PeriphClockCmd (RCC_APB2Periph_SPI1, ENABLE);

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_Low; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Hard; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;//32 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7;

///////////////////////////////////////////////////////////////////////////// // SPI1 Master initialization, SCK -> PA5, MOSI -> PA7 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; //PuPd_UP GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_0); GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_0);

// MISO -> PA6 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_0);

// CS or SS chip select -> PA4 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; GPIO_Init(GPIOA, &GPIO_InitStructure);

// SPI1 SPI_Init(SPI1, &SPI_InitStructure); SPI_RxFIFOThresholdConfig(SPI1, SPI_RxFIFOThreshold_QF); SPI_SSOutputCmd(SPI1,ENABLE); SPI_Cmd(SPI1, ENABLE);

}

void ChipSelectLow()
{ GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
}

void ChipSelectHigh ()
{ GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_SET);
}

uint8_t SPI1_send(uint8_t data){

SPI1->DR = data; // write data to be transmitted to the SPI data register while( !(SPI1->SR & SPI_I2S_FLAG_TXE) ); // wait until transmit complete while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete while( SPI1->SR & SPI_I2S_FLAG_BSY ); // wait until SPI is not busy anymore return SPI1->DR; // return received data from SPI data register
}

int main()
{ while (1) { spiInit();

ChipSelectHigh (); ChipSelectLow (); SPI_SendData8(SPI1 , 0x55); while( !(SPI1->SR & SPI_I2S_FLAG_TXE) ); // wait until transmit complete while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete while( SPI1->SR & SPI_I2S_FLAG_BSY ); // wait until SPI is not busy anymore ChipSelectHigh (); }

}

Reply

0 sneha shairak over 7 years ago in reply to Andy Neil

#include <stdio.h>
#include "stm32f0xx.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_it.h"
#include "stm32f0xx_rcc.h"

#include "stm32f0xx_usart.h"
#include "stm32f0xx_conf.h"
#include "stm32f0xx_adc.h"
#include "stm32f0xx_i2c.h"

#include "math.h"
#include "string.h"
#include "main.h"

#include "main.h"

void spiInit(void);

void spiInit()
{ SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB ,ENABLE); RCC_APB2PeriphClockCmd (RCC_APB2Periph_SPI1, ENABLE);

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_Low; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStructure.SPI_NSS = SPI_NSS_Hard; SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;//32 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7;

///////////////////////////////////////////////////////////////////////////// // SPI1 Master initialization, SCK -> PA5, MOSI -> PA7 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; //PuPd_UP GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_0); GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_0);

// MISO -> PA6 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_0);

// CS or SS chip select -> PA4 GPIO_StructInit (&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ; GPIO_Init(GPIOA, &GPIO_InitStructure);

// SPI1 SPI_Init(SPI1, &SPI_InitStructure); SPI_RxFIFOThresholdConfig(SPI1, SPI_RxFIFOThreshold_QF); SPI_SSOutputCmd(SPI1,ENABLE); SPI_Cmd(SPI1, ENABLE);

}

void ChipSelectLow()
{ GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_RESET);
}

void ChipSelectHigh ()
{ GPIO_WriteBit(GPIOA, GPIO_Pin_4, Bit_SET);
}

uint8_t SPI1_send(uint8_t data){

SPI1->DR = data; // write data to be transmitted to the SPI data register while( !(SPI1->SR & SPI_I2S_FLAG_TXE) ); // wait until transmit complete while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete while( SPI1->SR & SPI_I2S_FLAG_BSY ); // wait until SPI is not busy anymore return SPI1->DR; // return received data from SPI data register
}

int main()
{ while (1) { spiInit();

ChipSelectHigh (); ChipSelectLow (); SPI_SendData8(SPI1 , 0x55); while( !(SPI1->SR & SPI_I2S_FLAG_TXE) ); // wait until transmit complete while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete while( SPI1->SR & SPI_I2S_FLAG_BSY ); // wait until SPI is not busy anymore ChipSelectHigh (); }

}

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