No MOSI PULSE if use SPI re-mapped

Posted on February 28, 2013 at 04:03

A am using STM32F103T4, a low density device, and want to use the re-mapped SPI1. Below is my implementation:

  /* GPIO and AFIO clock enable */

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO| RCC_APB2Periph_GPIOB, ENABLE);

       

      /* Enable SPI */

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

       /*JTAG-DP Disabled and SW-DP Enabled */

       GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); //JTAG-DP Disabled and SW-DP Enabled 

        

        /* Configure REmapped- SPI pins: SCK, MISO and MOSI */

        GPIO_PinRemapConfig(GPIO_Remap_SPI1, ENABLE);

        

        //Configure SPI pins:  SCLK=PB3, MOSI=PB5

        GPIO_InitTypeDef GPIO_InitStructureB;

        GPIO_InitStructureB.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_5;

        GPIO_InitStructureB.GPIO_Mode = GPIO_Mode_AF_PP;

        GPIO_InitStructureB.GPIO_Speed = GPIO_Speed_50MHz;

        GPIO_Init(GPIOB, &GPIO_InitStructureB);

           

        //Configure SPI pins:  MISO=PB4

        GPIO_InitStructureB.GPIO_Pin = GPIO_Pin_4;

        GPIO_InitStructureB.GPIO_Mode = GPIO_Mode_IN_FLOATING;

        GPIO_Init(GPIOB, &GPIO_InitStructureB);

        GPIO_InitTypeDef GPIO_InitStructure;

My problem is I have a clock pulse but no MOSI pulse. Do I have a missing code for MOSI on PB5 to work. kindly help.

#spi-stm32f103 #spi-re-mapped