diy-tracker/uart.cpp at master · remsiux/diy-tracker · GitHub

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#include "uart.h"

void UART_ConfigNVIC(uint8_t IRQ, uint8_t Priority, uint8_t SubPriority)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_InitStructure.NVIC_IRQChannel = IRQ;                     // Enable the USART Interrupt
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = Priority;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = SubPriority;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void UART_ConfigGPIO(GPIO_TypeDef* GPIO, uint16_t InpPin, uint16_t OutPin)
{
  GPIO_InitTypeDef  GPIO_InitStructure;

  GPIO_InitStructure.GPIO_Pin   = InpPin;         // Configure USART Rx (input) pin as input floating
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIO, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin   = OutPin;          // Configure USART Tx (output) pin as alternate function push-pull
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
  GPIO_Init(GPIO, &GPIO_InitStructure);
}

void UART_ConfigUSART(USART_TypeDef* USART, int BaudRate)
{
  USART_InitTypeDef USART_InitStructure;
  USART_ClockInitTypeDef USART_ClockInitStructure;

  USART_InitStructure.USART_BaudRate            = BaudRate; // UART2 at 9600bps (GPS)
  USART_InitStructure.USART_WordLength          = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits            = USART_StopBits_1;
  USART_InitStructure.USART_Parity              = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode                = USART_Mode_Rx | USART_Mode_Tx;

  USART_ClockInitStructure.USART_Clock          = USART_Clock_Disable;
  USART_ClockInitStructure.USART_CPOL           = USART_CPOL_Low;
  USART_ClockInitStructure.USART_CPHA           = USART_CPHA_2Edge;
  USART_ClockInitStructure.USART_LastBit        = USART_LastBit_Disable;

  USART_Init     (USART, &USART_InitStructure);
  USART_ClockInit(USART, &USART_ClockInitStructure);   // write parameters
}