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/******************************************************************************
* @brief providing common UART API.
*
******************************************************************************/
#include "uart.h"
/******************************************************************************
* Local variables
******************************************************************************/
UART_CallbackType UART_Callback = NULL;
/******************************************************************************
* Local function prototypes
******************************************************************************/
/******************************************************************************
* Local functions
*****************************************************************************/
/******************************************************************************
* Global functions
******************************************************************************/
/******************************************************************************
* define UART APIs
*
*//*! @addtogroup uart_api_list
* @{
*******************************************************************************/
/*****************************************************************************//*!
*
* @brief initialize the UART, interrupts disabled, and no hardware flow-control.
*
* @param[in] pUART base of UART port
* @param[in] pConfig pointer to UART configuration structure
*
* @return none
*
* @ Pass/ Fail criteria: none
*****************************************************************************/
void UART_Init(UART_Type *pUART, UART_ConfigType *pConfig)
{
uint16_t u16Sbr;
uint8_t u8Temp;
uint32_t u32SysClk = pConfig->u32SysClkHz;
uint32_t u32Baud = pConfig->u32Baudrate;
/* 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_NV32) | defined(CPU_NV326)
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;
/* 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 );
}
/*****************************************************************************//*!
*
* @brief receive a character.
*
* @param[in] pUART base of UART port
*
* @return unsigned char
*
*****************************************************************************/
uint8_t UART_GetChar(UART_Type *pUART)
{
/* Sanity check */
ASSERT((pUART == UART0) || (pUART == UART1) || (pUART == UART2));
/* Wait until character has been received */
while (!(pUART->S1 & UART_S1_RDRF_MASK));
/* Return the 8-bit data from the receiver */
return pUART->D;
}
/*****************************************************************************//*!
*
* @brief send a character.
*
* @param[in] pUART base of UART port
* @param[in] u8Char char to send
*
* @return none
*
*****************************************************************************/
void UART_PutChar(UART_Type *pUART, uint8_t u8Char)
{
/* Wait until space is available in the FIFO */
while (!(pUART->S1 & UART_S1_TDRE_MASK));
/* Send the character */
pUART->D = (uint8_t)u8Char;
}
/*****************************************************************************//*!
*
* @brief set baudrate.
*
* @param[in] pUART base of UART port
* @param[in] pConfig baudrate config parameters
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART_SetBaudrate(UART_Type *pUART, UART_ConfigBaudrateType *pConfig)
{
uint8_t u8Temp;
uint16_t u16Sbr;
uint32_t u32SysClk = pConfig->u32SysClkHz;
uint32_t u32baud = pConfig->u32Baudrate;
/* Sanity check */
ASSERT((pUART == UART0) || (pUART == UART1) || (pUART == UART2));
/* 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 );
}
/*****************************************************************************//*!
*
* @brief enable interrupt.
*
* @param[in] pUART base of UART port
* @param[in] InterruptType interrupt type
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART_EnableInterrupt(UART_Type *pUART, UART_InterruptType InterruptType)
{
/* Sanity check */
ASSERT((pUART == UART0) || (pUART == UART1) || (pUART == UART2));
if (InterruptType == UART_TxBuffEmptyInt)
{
pUART->C2 |= UART_C2_TIE_MASK;
}
else if (InterruptType == UART_TxCompleteInt)
{
pUART->C2 |= UART_C2_TCIE_MASK;
}
else if (InterruptType == UART_RxBuffFullInt)
{
pUART->C2 |= UART_C2_RIE_MASK;
}
else if (InterruptType == UART_IdleLineInt)
{
pUART->C2 |= UART_C2_ILIE_MASK;
}
else if (InterruptType == UART_RxOverrunInt)
{
pUART->C3 |= UART_C3_ORIE_MASK;
}
else if (InterruptType == UART_NoiseErrorInt)
{
pUART->C3 |= UART_C3_NEIE_MASK;
}
else if (InterruptType == UART_FramingErrorInt)
{
pUART->C3 |= UART_C3_FEIE_MASK;
}
else if (InterruptType == UART_ParityErrorInt)
{
pUART->C3 |= UART_C3_FEIE_MASK;
}
else
{
/* un-supported Interrupt type */
}
}
/*****************************************************************************//*!
*
* @brief disable interrupt.
*
* @param[in] pUART base of UART port
* @param[in] InterruptType interrupt type
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART_DisableInterrupt(UART_Type *pUART, UART_InterruptType InterruptType)
{
/* Sanity check */
ASSERT((pUART == UART0) || (pUART == UART1) || (pUART == UART2));
if (InterruptType == UART_TxBuffEmptyInt)
{
pUART->C2 &= (~UART_C2_TIE_MASK);
}
else if (InterruptType == UART_TxCompleteInt)
{
pUART->C2 &= (~UART_C2_TCIE_MASK);
}
else if (InterruptType == UART_RxBuffFullInt)
{
pUART->C2 &= (~UART_C2_RIE_MASK);
}
else if (InterruptType == UART_IdleLineInt)
{
pUART->C2 &= (~UART_C2_ILIE_MASK);
}
else if (InterruptType == UART_RxOverrunInt)
{
pUART->C3 &= (~UART_C3_ORIE_MASK);
}
else if (InterruptType == UART_NoiseErrorInt)
{
pUART->C3 &= (~UART_C3_NEIE_MASK);
}
else if (InterruptType == UART_FramingErrorInt)
{
pUART->C3 &= (~UART_C3_FEIE_MASK);
}
else if (InterruptType == UART_ParityErrorInt)
{
pUART->C3 &= (~UART_C3_FEIE_MASK);
}
else
{
/* un-supported interrupt type */
}
}
/*****************************************************************************//*!
*
* @brief get flags from 2 UART status registers.
*
* @param[in] pUART base of UART port
*
* @return 16-bit flags
*
* @ Pass/ Fail criteria:
*****************************************************************************/
uint16_t UART_GetFlags(UART_Type *pUART)
{
uint16_t u16StatusFlags = 0;
u16StatusFlags = pUART->S2;
u16StatusFlags = (u16StatusFlags<<8)| pUART->S1;
return u16StatusFlags;
}
/*****************************************************************************//*!
*
* @brief check whether the specified flag is set.
*
* @param[in] pUART base of UART port
* @param[in] FlagType flag type
*
* @return
* 1, flag is set
* 0, flag is clear
*
* @ Pass/ Fail criteria: none
*****************************************************************************/
uint8_t UART_CheckFlag(UART_Type *pUART, UART_FlagType FlagType)
{
uint16_t u16StatusFlags = 0;
u16StatusFlags = UART_GetFlags(pUART);
return (u16StatusFlags & (1<<FlagType));
}
/*****************************************************************************//*!
*
* @brief send a series of charecters using polling mode.
*
* @param[in] pUART base of UART port
* @param[in] pSendBuff pointer of charecters to send
* @param[in] u32Length number of charecters
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART_SendWait(UART_Type *pUART, uint8_t *pSendBuff, uint32_t u32Length)
{
uint8_t u8TxChar;
uint32_t i;
for (i = 0; i < u32Length; i++)
{
u8TxChar = pSendBuff[i];
while (!UART_IsTxBuffEmpty(pUART))
{
#if defined(ENABLE_WDOG)
WDOG_Feed();
#endif
}
UART_WriteDataReg(pUART, u8TxChar);
}
}
/*****************************************************************************//*!
*
* @brief receive a series of charecters using polling mode.
*
* @param[in] pUART base of UART port
* @param[in] pReceiveBuff pointer of charecters to receive
* @param[in] u32Length number of charecters
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART_ReceiveWait(UART_Type *pUART, uint8_t *pReceiveBuff, uint32_t u32Length)
{
uint8_t u8RxChar;
uint32_t i;
for (i = 0; i < u32Length; i++)
{
while (!UART_IsRxBuffFull(pUART))
{
#if defined(ENABLE_WDOG)
WDOG_Feed();
#endif
}
u8RxChar = UART_ReadDataReg(pUART);
pReceiveBuff[i] = u8RxChar;
}
}
/*****************************************************************************//*!
*
* @brief wait tx complete.
*
* @param[in] pUART base of UART port
*
* @return none
*
* @ Pass/ Fail criteria: none*****************************************************************************/
void UART_WaitTxComplete(UART_Type *pUART)
{
while (!UART_IsTxComplete(pUART));
}
/*****************************************************************************//*!
*
* @brief set up UART callback routines to be called by interrupt service routine.
*
* @param[in] pUART pointer to an UART register base
* @param[in] pfnCallback callback routine
*
* @return none
*
* @ Pass/ Fail criteria: none
*****************************************************************************/
void UART_SetCallback(UART_CallbackType pfnCallback)
{
//uint8_t u8Port = ((uint32_t)pUART-(uint32_t)UART0)>>12;
UART_Callback = pfnCallback;
}
/*! @} End of uart_api_list */
/*****************************************************************************//*!
*
* @brief uart0 interrupt service routine.
*
* @param none
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART0_Isr(void)
{
UART_Callback(UART0);
}
#if defined(CPU_NV32) | defined(CPU_NV326)
/*****************************************************************************//*!
*
* @brief uart1 interrupt service routine.
*
* @param none
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART1_Isr(void)
{
UART_Callback(UART1);
}
/*****************************************************************************//*!
*
* @brief uart2 interrupt service routine.
*
* @param none
*
* @return none
*
* @ Pass/ Fail criteria:
*****************************************************************************/
void UART2_Isr(void)
{
UART_Callback(UART2);
}
#endif
|
