STM32L151 SPI1 Problem

[arulprabhu]

Posted on January 12, 2013 at 06:44

Hi clive,

I have a started a new thread for discussion about SPI1 problem in STM32L151. I used PA4-A7 for SPI1 This is my SPI configuration code, My system clock is HSE  and it is 8MHZ. There is a continuous reset happens when the SPI transfer starts, Can anyone find the problem, void RCC_config(void)  {     ErrorStatus HSEStartUpStatus;     /* RCC system reset(for debug purpose) */     RCC_DeInit();     /* Enable HSE */     RCC_HSEConfig(RCC_HSE_ON);     /* Wait till HSE is ready */     HSEStartUpStatus = RCC_WaitForHSEStartUp();     if (HSEStartUpStatus == SUCCESS)     {         /* HCLK = SYSCLK */         RCC_HCLKConfig(RCC_SYSCLK_Div1);         /* PCLK2 = HCLK */         RCC_PCLK2Config(RCC_HCLK_Div2);         /* PCLK1 = HCLK/2 */         RCC_PCLK1Config(RCC_HCLK_Div2);                                                   PWR_VoltageScalingConfig(PWR_VoltageScaling_Range1);            RCC_PLLCmd(DISABLE);          /* Wait till HSE is ready */         while (RCC_GetFlagStatus(RCC_FLAG_HSERDY) == RESET)         {         }          RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE);     // 8MHz            /* Wait till HSE is used as system clock source */         while (RCC_GetSYSCLKSource() != 0x08)         {         }                           RCC_AHBPeriphClockCmd ( RCC_AHBPeriph_GPIOA|RCC_AHBPeriph_GPIOB, ENABLE);         RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 , ENABLE);  } } SPI configuration code:  GPIO_InitTypeDef  GPIO_InitStructure;   SPI_InitTypeDef   SPI_InitStructure;          SPI_I2S_DeInit(SPI1);                  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);     RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);             GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;   GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;   GPIO_Init(GPIOA, &GPIO_InitStructure);                       GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;   GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;   GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;   GPIO_Init(GPIOA, &GPIO_InitStructure);          GPIO_SetBits(GPIOA, GPIO_Pin_4);                 GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);     GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);     GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);              /*!< SD_SPI 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_Low;   SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;   SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;   SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;   SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;   SPI_InitStructure.SPI_CRCPolynomial = 7;   SPI_Init(SPI1, &SPI_InitStructure);     SPI_Cmd(SPI1, ENABLE); #spi1-cause-continuous-reset