Exemple #1
0
//-----------------------------------------------------------------------------
static void uart_init(uint32_t baud)
{
  uint64_t br = (uint64_t)65536 * (F_CPU - 16 * baud) / F_CPU;

  HAL_GPIO_UART_TX_out();
  HAL_GPIO_UART_TX_pmuxen(PORT_PMUX_PMUXE_C_Val);
  HAL_GPIO_UART_RX_in();
  HAL_GPIO_UART_RX_pmuxen(PORT_PMUX_PMUXE_C_Val);

  PM->APBCMASK.reg |= PM_APBCMASK_SERCOM0;

  GCLK->CLKCTRL.reg = GCLK_CLKCTRL_ID(SERCOM0_GCLK_ID_CORE) |
      GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN(0);

  SERCOM0->USART.CTRLA.reg =
      SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE_USART_INT_CLK |
      SERCOM_USART_CTRLA_RXPO(3/*PAD3*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/);

  SERCOM0->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN |
      SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/);

  SERCOM0->USART.BAUD.reg = (uint16_t)br+1;

  SERCOM0->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE;
}
Exemple #2
0
void HAL_UartInit(uint32_t baudrate)
{
  uint32_t brr = ((uint32_t)F_CPU * 2) / (16 * baudrate) - 1;

  HAL_GPIO_UART_TX_out();
  HAL_GPIO_UART_TX_set();
  HAL_GPIO_UART_RX_in();

  USARTx.BAUDCTRLA = (brr & 0xff);
  USARTx.BAUDCTRLB = (brr >> 8) & 0x0f;
  USARTx.CTRLB = USART_CLK2X_bm | USART_RXEN_bm | USART_TXEN_bm;
  USARTx.CTRLC = (uint8_t)USART_CHSIZE_8BIT_gc | USART_PMODE_DISABLED_gc;
  USARTx.CTRLA = USART_RXCINTLVL_LO_gc;

  txFifo.data = txData;
  txFifo.size = HAL_UART_TX_FIFO_SIZE;
  txFifo.bytes = 0;
  txFifo.head = 0;
  txFifo.tail = 0;

  rxFifo.data = rxData;
  rxFifo.size = HAL_UART_RX_FIFO_SIZE;
  rxFifo.bytes = 0;
  rxFifo.head = 0;
  rxFifo.tail = 0;

  udrEmpty = true;
  newData = false;
}
Exemple #3
0
//-----------------------------------------------------------------------------
static void uart_init(uint32_t baud)
{
  HAL_GPIO_UART_TX_out();
  HAL_GPIO_UART_TX_pmuxen(HAL_GPIO_PMUX_D);
  HAL_GPIO_UART_RX_in();
  HAL_GPIO_UART_RX_pmuxen(HAL_GPIO_PMUX_D);

  MCLK->APBBMASK.reg |= MCLK_APBBMASK_SERCOM2;

  GCLK->PCHCTRL[SERCOM2_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN;
  while (0 == (GCLK->PCHCTRL[SERCOM2_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN));

  SERCOM2->USART.CTRLA.reg =
      SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1/*INT_CLK*/) |
      SERCOM_USART_CTRLA_RXPO(1/*PAD1*/) | SERCOM_USART_CTRLA_TXPO(0/*PAD0*/) |
      SERCOM_USART_CTRLA_SAMPR(1);

  SERCOM2->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN |
      SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/);

  #define BAUD_VAL (F_CPU / (16 * baud))
  #define FP_VAL   ((F_CPU / baud - 16 * BAUD_VAL) / 2)

  SERCOM2->USART.BAUD.reg = 
      SERCOM_USART_BAUD_FRACFP_BAUD(BAUD_VAL) |
      SERCOM_USART_BAUD_FRACFP_FP(FP_VAL);

  SERCOM2->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE;
}
Exemple #4
0
//-----------------------------------------------------------------------------
static void uart_init(uint32_t baud)
{
  uint64_t br = (uint64_t)65536 * (F_CPU - 16 * baud) / F_CPU;

  HAL_GPIO_UART_TX_out();
  HAL_GPIO_UART_TX_pmuxen(HAL_GPIO_PMUX_D);
  HAL_GPIO_UART_RX_in();
  HAL_GPIO_UART_RX_pmuxen(HAL_GPIO_PMUX_D);

  MCLK->APBCMASK.reg |= MCLK_APBCMASK_SERCOM4;

  GCLK->PCHCTRL[SERCOM4_GCLK_ID_CORE].reg = GCLK_PCHCTRL_GEN(0) | GCLK_PCHCTRL_CHEN;
  while (0 == (GCLK->PCHCTRL[SERCOM4_GCLK_ID_CORE].reg & GCLK_PCHCTRL_CHEN));

  SERCOM4->USART.CTRLA.reg =
      SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_MODE(1/*USART_INT_CLK*/) |
      SERCOM_USART_CTRLA_RXPO(3/*PAD3*/) | SERCOM_USART_CTRLA_TXPO(1/*PAD2*/);

  SERCOM4->USART.CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN |
      SERCOM_USART_CTRLB_CHSIZE(0/*8 bits*/);

  SERCOM4->USART.BAUD.reg = (uint16_t)br;

  SERCOM4->USART.CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE;
}