USART communication INEMO- STM32F4

[sinatra]

Posted on May 02, 2015 at 13:38

Good morning guys. I'm writing because I need help for interfacing an Inemo M1 with a STM32F4. I have the need to take all the sensor values of  Inemo on  F4 via USART. I used to start the sample code of  'Inemo called ''AHRS_LIB_Continuos'' and I implemented a small library for port configuration USART1 that I post below:

#include ''inemo_usart_interface.h''#include ''iNemo_Led.h''/* PIN on J12 equal to Tx 6 (GPIOA9) e Rx 7 (GPIOA10)*/FlagStatus xUsartTxComplete;FlagStatus xUsartRxComplete;void usart1_IRQHandler(void);ErrorStatus usart_initialize() {    USART_InitTypeDef usart_init;  NVIC_InitTypeDef NVIC_InitStructure;  GPIO_InitTypeDef GPIO_InitStructure;    /*Enable usart periph clock */  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE);    /* Configure and enable usart1 interrupt */  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;  NVIC_Init(&NVIC_InitStructure);    /* Configure usart pins: RX and TX ---------------------------------*/  /* Configure MISO pin as Alternate Function Push Pull */  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  GPIO_Init(GPIOA, &GPIO_InitStructure);    /* Init usart */    usart_init.USART_BaudRate = 512000;  usart_init.USART_WordLength = USART_WordLength_8b   ;   usart_init.USART_StopBits = USART_StopBits_1;  usart_init.USART_Parity = USART_Parity_No;  usart_init.USART_Mode = USART_Mode_Rx;  usart_init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;  USART_Init(USART1, &usart_init);    USART_Cmd(USART1, ENABLE);    USART_ITConfig(USART1, USART_IT_TXE, ENABLE);  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);  xUsartRxComplete = USART_GetFlagStatus(USART1, USART_IT_RXNE);  xUsartTxComplete = USART_GetFlagStatus(USART1, USART_IT_TXE);  iNEMO_Led_Toggle(LED1);  return SUCCESS;}void usart_raw_receive(uint8_t *data, uint16_t length) {    uint16_t i;  uint8_t rxbyte;    for(i=0; i<length; i++) {    rxbyte = USART_ReceiveData(USART1);    data[i] = rxbyte;    while(xUsartRxComplete != SET);    xUsartRxComplete = RESET;  }  //  if(data[0] == 0xAA){iNEMO_Led_Toggle(LED1);};}void USART1_IRQHandler(void) {  if (USART_GetITStatus(USART1, USART_IT_TXE) != RESET) {    xUsartTxComplete = SET;    USART_ClearITPendingBit(USART1, USART_IT_TXE);  } else if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) {    xUsartRxComplete = SET;    USART_ClearITPendingBit(USART1, USART_IT_RXNE);  }}  Given that the transmission from the F4 working properly, because already tested, I need to run the rx and tx on 'Inemo. Do you believe that I have to change something in the example code (for example vector table or other things ) and in my library? In particular in this case I'm trying to send a byte from F4 to inemo to test the communication, but it doesn' t work.Thank you. I await answers.