MKE06Z uart初始化

jinyd716 · 发表于 2018-3-15 11:20:57

最近在使用MKE06Z，按例程进行uart初始化时，UART寄存器值总为0，初始化不成功，而同一工程中ADC、定时器、can等寄存器值均可设置，求高手指点！代码如下：
void uart_init(void)
{
UART_ConfigType sConfig = {0};

sConfig.u32SysClkHz = 20970000;

sConfig.u32Baudrate = 9600;
sConfig.sSettings.b9bitModeEn = 0;
sConfig.sSettings.bParityEn = 0;
UARTx_Init(UART0, &sConfig);
}

void UARTx_Init(UART_Type *pUART, UART_ConfigType *pConfig)
{
uint16_t u16Sbr;
uint8_t u8Temp;
uint32_t u32SysClk = pConfig->u32SysClkHz;
uint32_t u32Baud = pConfig->u32Baudrate;
uint8_t b9bitModeEn = pConfig->sSettings.b9bitModeEn;
uint8_t bParityEn = pConfig->sSettings.bParityEn;
uint8_t bParityType = pConfig->sSettings.bParityType;
/* Sanity check */
ASSERT((pUART == UART0) || (pUART == UART1) || (pUART == UART2));

/* Enable the clock to the selected UART */
if (pUART == UART0)
{
      SIM->SCGC |= SIM_SCGC_UART0_MASK;
}
#if defined(CPU_KE02)  | defined(CPU_KE06)
else if (pUART == UART1)
{
      SIM->SCGC |= SIM_SCGC_UART1_MASK;
}
else
{
      SIM->SCGC |= SIM_SCGC_UART2_MASK;
}
#endif
/* Make sure that the transmitter and receiver are disabled while we
   * change settings.
   */
pUART->C2 &= ~(UART_C2_TE_MASK | UART_C2_RE_MASK );

/* Configure the UART for 8-bit mode, no parity */
pUART->C1 = 0;
//8-bit mode config
if (b9bitModeEn)
{
      //if not the default 8-bit mode, then enable 9-bit mode
      pUART->C1 |= UART_C1_M_MASK;
}
//parity check config
if (bParityEn)
{
      pUART->C1 |= UART_C1_PE_MASK;
      if (bParityType)
      {
         //if not defult even parity type, enable odd parity type
         pUART->C1 |= UART_C1_PT_MASK;
      }
}

/* Calculate baud settings */
u16Sbr = (((u32SysClk)>>4) + (u32Baud>>1))/u32Baud;

/* Save off the current value of the UARTx_BDH except for the SBR field */
u8Temp = pUART->BDH & ~(UART_BDH_SBR_MASK);

pUART->BDH = u8Temp |  UART_BDH_SBR(u16Sbr >> 8);
pUART->BDL = (uint8_t)(u16Sbr & UART_BDL_SBR_MASK);
/* Enable receiver and transmitter */
pUART->C2 |= (UART_C2_TE_MASK | UART_C2_RE_MASK );
}