M0的串口問題

ID:82781 · 發表于 2015-6-13 16:41

前天拿到的芯片，端口驅動沒有問題，偏偏是串口出了問題，剛開始是沒有開始端口復用，而昨天一整天我都在研究為什么可以接受到數據，但是數據是錯誤的，一整天，就是找不到程序中哪里出了問題，昨晚上睡覺之前就在思考，終究不能知道為什么，因為他的寄存器什么的我都沒時間仔細研究，心想著今天來一個一個的研究，今早卻靈光一現，今天起得特別早，因為還惦記這個問題，睡不著，為什么不看看硬件呢？我就來到加了一塊串口驅動板，哈哈令人興奮。電腦瞑目上閃現的數字和我期待的是一樣的，嘎嘎，證明軟件的配置昨天一天都是對的，只是沒想到硬件出問題！哎！加油吧，總算是搞定串口發送了。雖然微不足道，但是也足以令我興奮十天半月！

王均偉
日照高科園，FUCK!
注意：CPU時鐘和HCLK時鐘是單獨的，相互獨立，所以得要單獨開啟，他不同于STM32，他只有一個外設橋，沒有DMA通道，相對
的外設資源也是相對匱乏的，但是相對于8位單片機他已經非常強大了！現在感覺和STM32的操作越來越像！
加油吧！

下面是APP和部分程序

E_DRVGPIO_PIN sPinNumber; //枚舉引腳
STR_UART_T config;
uint32_t start[10];
/*---------------------------------------------------------------------------------------------------------*/
/* MAIN function */
/*---------------------------------------------------------------------------------------------------------*/
int main (void)
{
uint8_t tab[12]={6,5,6,7,8,9};
uint8_t tab1[10];
while(DrvSYS_SetOscCtrl(E_SYS_XTL12M, 1)!=0);//使能外部12MHZ晶振
while( DrvSYS_SelectHCLKSource(0) !=0);//HCLK選擇外部12MHZ晶振
while(DrvSYS_SelectSysTickSource(0)!=0);//選擇系統嘀嗒時鐘源為外部12MHZ晶振
DrvSYS_SetIPClock(E_SYS_UART0_CLK,1);//使能UART0時鐘
while(DrvSYS_SetClockDivider(E_SYS_HCLK_DIV, 0)!=0); //1分頻UART&HCLK
while(DrvSYS_SetClockDivider(E_SYS_UART_DIV, 0)!=0); //1分頻UART&HCLK
DrvSYS_SelectIPClockSource(E_SYS_UART_CLKSRC, 0);//UART選擇外部12Mhz的時鐘源
DrvGPIO_InitFunction(E_FUNC_UART0);//復用IO編程UART模式
/*關閉所有串口中斷*/
DrvUART_DisableInt(UART_PORT0,DRVUART_WAKEUPINT|DRVUART_RLSINT|DRVUART_BUFERRINT|DRVUART_MOSINT|DRVUART_THREINT|DRVUART_RDAINT|DRVUART_TOUTINT);
/*設置串口參數*/
config.u32BaudRate=9600; //波特率9600
config.u8cDataBits=DRVUART_DATABITS_8 ;//數據位8位
config.u8cStopBits=DRVUART_STOPBITS_1; //停止位1位
config.u8cParity=DRVUART_PARITY_NONE ; //NONE校驗
config.u8cRxTriggerLevel=DRVUART_FIFO_8BYTES;//接受FIFO 8字節
DrvUART_Open(UART_PORT0, &config);//開啟UART端口
/*端口模式*/
DrvGPIO_Open(E_PORT3,E_PIN6, E_IO_OUTPUT);
DrvGPIO_Open(E_PORT0,E_PIN0, E_IO_INPUT);//input
sPinNumber=E_PIN6;
while(1)
{
// _DRVUART_SENDBYTE(UART_PORT0,2);
if(DrvGPIO_GetBit(E_PORT0,E_PIN0 )==0)
{
DrvUART_Write(UART_PORT0,tab,3);
DrvGPIO_ClrBit(E_PORT3,sPinNumber);
DrvSYS_Delay(500000);
DrvGPIO_SetBit(E_PORT3, E_PIN6);
DrvSYS_Delay(500000);
}
}
}
static void BaudRateCalculator(uint32_t clk, uint32_t baudRate, E_UART_PORT u32Port)
{
int32_t tmp;
int32_t div;
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
if ((((clk / baudRate)%16) < 2) && (clk>(baudRate*16*2))) /* Source Clock mod 16 < 2 => Using Divider X =16 (MODE#0) */
{
tUART->BAUD.DIV_X_EN = 0;
tUART->BAUD.DIV_X_ONE = 0;
tmp = clk / baudRate/16 -2;
}
else /* Source Clock mod 16 >2 => Up 5% Error BaudRate */
{
tUART->BAUD.DIV_X_EN = 1; /* Try to Set Divider X = 1 (MODE#2)*/
tUART->BAUD.DIV_X_ONE = 1;
tmp = clk / baudRate -2;
if(tmp > 0xFFFF) /* If Divider > Range */
{
tUART->BAUD.DIV_X_EN = 1; /* Try to Set Divider X up 10 (MODE#1) */
tUART->BAUD.DIV_X_ONE = 0;
for(div = 8; div <16;div++)
{
if(((clk / baudRate)%(div+1))<3)
{
tUART->BAUD.DIVIDER_X = div;
tmp = clk / baudRate / (div+1) -2;
break;
}
}
}
}
tUART->BAUD.BRD = tmp;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: GetUartClk */
/* */
/* Parameter: */
/* clk -[in] Uart Source Clock */
/* baudRate -[in] User seting BaudRate */
/* UART_BAUD_T *baud -[in] Get User Settings */
/* Returns: */
/* Current Uart Clock (Hz) */
/* Description: */
/* The function is used to get Uart clock */
/*---------------------------------------------------------------------------------------------------------*/
static uint32_t GetUartClock(void)
{
uint32_t clk =0 , div;
div = SYSCLK->CLKDIV.UART_N; /* According PLL Clock and UART_Divider to get clock */
/* Check UART Clock Source Setting */
if(SYSCLK->CLKSEL1.UART_S == 0)
{
clk = DrvSYS_GetExtClockFreq()/ (div+1);; /* Get External Clock From DrvSYS Setting */
}
else if(SYSCLK->CLKSEL1.UART_S == 1)
{
clk = DrvSYS_GetPLLClockFreq()/ (div+1);
}
else
clk = __IRC22M/ (div+1); /* Clock 22Mhz */
return clk;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_SetRTS */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* uint8_t -[in] RTS Value */
/* Set 0: Drive RTS pin to logic 1 (If the LEV_RTS set to low level triggered). */
/* Drive RTS pin to logic 0 (If the LEV_RTS set to high level triggered) */
/* Set 1: Drive RTS pin to logic 0 (If the LEV_RTS set to low level triggered) */
/* Drive RTS pin to logic 1 (If the LEV_RTS set to high level triggered) */
/* Note. Lev_RTS is RTS Trigger Level. 0 is low level and 1 is high level */
/* */
/* u16TriggerLevel - [in] RTS Trigger Level :DRVUART_FIFO_1BYTES to DRVUART_FIFO_62BYTES */
/* Returns: */
/* None */
/* */
/* Description: */
/* The function is used to set RTS information */
/*---------------------------------------------------------------------------------------------------------*/
void DrvUART_SetRTS(E_UART_PORT u32Port,uint8_t u8Value,uint16_t u16TriggerLevel)
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
tUART->MCR.RTS = u8Value;
tUART->FCR.RTS_TRI_LEV = u16TriggerLevel;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_Open */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* sParam -[in] the struct parameter to configure UART */
/* include of */
/* * u32BaudRate - Baud rate */
/* * u8cParity - DRVUART_PARITY_NONE / DRVUART_PARITY_EVEN / DRVUART_PARITY_ODD*/
/* * u8cDataBits - DRVUART_DATA_BITS_5 / DRVUART_DATA_BITS_6 */
/* DRVUART_DATA_BITS_7 / DRVUART_DATA_BITS_8 */
/* * u8cStopBits - DRVUART_STOPBITS_1 / STOPBITS_1_5 / STOPBITS_2 */
/* * u8cRxTriggerLevel - LEVEL_1_BYTE to LEVEL_62_BYTES */
/* * u8TimeOut - Time out value */
/* */
/* */
/* Returns: */
/* E_DRVUART_ERR_PORT_INVALID */
/* E_DRVUART_ERR_PARITY_INVALID */
/* E_DRVUART_ERR_DATA_BITS_INVALID */
/* E_DRVUART_ERR_STOP_BITS_INVALID */
/* E_DRVUART_ERR_TRIGGERLEVEL_INVALID */
/* E_DRVUART_ERR_ALLOC_MEMORY_FAIL */
/* E_SUCCESS */
/* */
/* Description: */
/* The function is used to initialize UART. It consists of baud-rate, parity, data-bits, */
/* stop-bits, rx-trigger-level and timeout interval settings. */
/* */
/*---------------------------------------------------------------------------------------------------------*/
int32_t DrvUART_Open(E_UART_PORT u32Port, STR_UART_T *sParam)
{
UART_T * tUART;
/*-----------------------------------------------------------------------------------------------------*/
/* Check UART port */
/*-----------------------------------------------------------------------------------------------------*/
if ((u32Port != UART_PORT0) &&
(u32Port != UART_PORT1))
{
return E_DRVUART_ERR_PORT_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied parity */
/*-----------------------------------------------------------------------------------------------------*/
if ((sParam->u8cParity != DRVUART_PARITY_NONE) &&
(sParam->u8cParity != DRVUART_PARITY_EVEN) &&
(sParam->u8cParity != DRVUART_PARITY_ODD) &&
(sParam->u8cParity != DRVUART_PARITY_MARK) &&
(sParam->u8cParity != DRVUART_PARITY_SPACE))
{
return E_DRVUART_ERR_PARITY_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied number of data bits */
/*-----------------------------------------------------------------------------------------------------*/
else if ((sParam->u8cDataBits != DRVUART_DATABITS_5) &&
(sParam->u8cDataBits != DRVUART_DATABITS_6) &&
(sParam->u8cDataBits != DRVUART_DATABITS_7) &&
(sParam->u8cDataBits != DRVUART_DATABITS_8))
{
return E_DRVUART_ERR_DATA_BITS_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied number of stop bits */
/*-----------------------------------------------------------------------------------------------------*/
else if ((sParam->u8cStopBits != DRVUART_STOPBITS_1) &&
(sParam->u8cStopBits != DRVUART_STOPBITS_2) &&
(sParam->u8cStopBits != DRVUART_STOPBITS_1_5)
)
{
return E_DRVUART_ERR_STOP_BITS_INVALID;
}
/*-----------------------------------------------------------------------------------------------------*/
/* Check the supplied nember of trigger level bytes */
/*-----------------------------------------------------------------------------------------------------*/
else if ((sParam->u8cRxTriggerLevel != DRVUART_FIFO_1BYTES) &&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_4BYTES) &&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_8BYTES) &&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_14BYTES)&&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_30BYTES)&&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_46BYTES)&&
(sParam->u8cRxTriggerLevel != DRVUART_FIFO_62BYTES))
{
return E_DRVUART_ERR_TRIGGERLEVEL_INVALID;
}
if(u32Port == UART_PORT0)
{
/* Reset IP */
SYS->IPRSTC2.UART0_RST = 1;
SYS->IPRSTC2.UART0_RST = 0;
/* Enable UART clock */
SYSCLK->APBCLK.UART0_EN = 1;
}
else
{
/* Reset IP */
SYS->IPRSTC2.UART1_RST = 1;
SYS->IPRSTC2.UART1_RST = 0;
/* Enable UART clock */
SYSCLK->APBCLK.UART1_EN = 1;
}
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
/* Tx FIFO Reset & Rx FIFO Reset & FIFO Mode Enable */
tUART->FCR.TFR =1;
tUART->FCR.RFR =1;
/* Set Rx Trigger Level */
tUART->FCR.RFITL = sParam->u8cRxTriggerLevel;
/* Set Parity & Data bits & Stop bits */
tUART->LCR.SPE =((sParam->u8cParity)&0x4)?1:0;
tUART->LCR.EPE =((sParam->u8cParity)&0x2)?1:0;
tUART->LCR.PBE =((sParam->u8cParity)&0x1)?1:0;
tUART->LCR.WLS =sParam->u8cDataBits;
tUART->LCR.NSB =sParam->u8cStopBits;
/* Set Time-Out */
tUART->TOR.TOIC =sParam->u8TimeOut;
/* Check Clock Source */
if(SYSCLK->PWRCON.XTL12M_EN)
SYSCLK->CLKSEL1.UART_S = 0;
else
{
if(SYSCLK->PLLCON.PD==0)
SYSCLK->CLKSEL1.UART_S = 1;
else
if(SYSCLK->PWRCON.OSC22M_EN)
SYSCLK->CLKSEL1.UART_S = 3;
else
return E_DRVUART_ERR_OPEN;
}
/* Set BaudRate */
BaudRateCalculator(GetUartClock(), sParam->u32BaudRate, u32Port);
return E_SUCCESS;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_Close */
/* */
/* Parameters: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* RETURN */
/* None */
/* Description: */
/* The function is used to disable UART clock, disable ISR and clear callback */
/* function pointer after checking the TX empty. */
/*---------------------------------------------------------------------------------------------------------*/
void DrvUART_Close(E_UART_PORT u32Port)
{
if(u32Port == UART_PORT1)
{
while(!UART1->FSR.TE_FLAG);
SYSCLK->APBCLK.UART1_EN = 0;
g_pfnUART1callback = NULL;
NVIC_DisableIRQ (UART1_IRQn);
}
else
{
while(!UART0->FSR.TE_FLAG);
SYSCLK->APBCLK.UART0_EN = 0;
g_pfnUART0callback = NULL;
NVIC_DisableIRQ(UART0_IRQn);
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_EnableInt */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* u32InterruptFlag -[in] DRVUART_WAKEUPINT/DRVUART_RLSINT/DRVUART_BUFERRINT */
/* DRVUART_MOSINT/DRVUART_THREINT/DRVUART_RDAINT/DRVUART_TOUTINT */
/* pfncallback -[in] A function pointer for callback function */
/* Returns: */
/* None */
/* Description: */
/* The function is used to enable specified UART interrupt, install the callback */
/* function and enable NVIC UART IRQ */
/* Remark: */
/* When enable DRVUART_THREINT interrupt source, the interrup will happen continouly if */
/* TX_FIFO is empty. Remind you thant be careful to use it. */
/* Please reference TRM to get more information. */
/*---------------------------------------------------------------------------------------------------------*/
void
DrvUART_EnableInt(
E_UART_PORT u32Port,
uint32_t u32InterruptFlag,
PFN_DRVUART_CALLBACK pfncallback
)
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
tUART->IER.RDA_IEN =(u32InterruptFlag & DRVUART_RDAINT)?1:0 ;
tUART->IER.THRE_IEN =(u32InterruptFlag & DRVUART_THREINT)?1:0;
tUART->IER.RLS_IEN =(u32InterruptFlag & DRVUART_RLSINT)?1:0;
tUART->IER.MODEM_IEN =(u32InterruptFlag & DRVUART_MOSINT)?1:0;
tUART->IER.TIME_OUT_EN =(u32InterruptFlag & DRVUART_TOUTINT)?1:0; /* Time-out count enable */
tUART->IER.RTO_IEN =(u32InterruptFlag & DRVUART_TOUTINT)?1:0; /* Time-out INT enable */
tUART->IER.BUF_ERR_IEN =(u32InterruptFlag & DRVUART_BUFERRINT)?1:0;
tUART->IER.WAKE_EN =(u32InterruptFlag & DRVUART_WAKEUPINT)?1:0;
if(u32Port == UART_PORT0) /* Install Callback function */
{
g_pfnUART0callback = pfncallback;
NVIC_SetPriority(UART0_IRQn, (1<<__NVIC_PRIO_BITS) - 2);
NVIC_EnableIRQ(UART0_IRQn);
}
else
{
g_pfnUART1callback = pfncallback;
NVIC_SetPriority(UART1_IRQn, (1<<__NVIC_PRIO_BITS) - 2);
NVIC_EnableIRQ(UART1_IRQn);
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_IsIntEnabled */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* u32InterruptFlag -[in] DRVUART_WAKEUPINT/DRVUART_RLSINT/DRVUART_BUFERRINT */
/* DRVUART_MOSINT/DRVUART_THREINT/DRVUART_RDAINT/DRVUART_TOUTINT */
/* Returns: */
/* Specified Interrupt Flag Set or clear */
/* Description: */
/* The function is used to get the "interrupt enable" status */
/*---------------------------------------------------------------------------------------------------------*/
uint32_t DrvUART_IsIntEnabled(E_UART_PORT u32Port,uint32_t u32InterruptFlag)
{
if(u32Port == UART_PORT0) /* Read IER Register and check specified flag is enable */
return ((inpw(&UART0->IER) &
(u32InterruptFlag & (DRVUART_WAKEUPINT |DRVUART_BUFERRINT|
DRVUART_TOUTINT | DRVUART_MOSINT | DRVUART_RLSINT| DRVUART_THREINT | DRVUART_RDAINT))))?1:0;
else
return ((inpw(&UART1->IER) &
(u32InterruptFlag & ( DRVUART_WAKEUPINT |DRVUART_BUFERRINT|
DRVUART_TOUTINT | DRVUART_MOSINT | DRVUART_RLSINT | DRVUART_THREINT | DRVUART_RDAINT))))?1:0;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_DisableInt */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* u32InterruptFlag -[in] DRVUART_WAKEUPINT/DRVUART_RLSINT/DRVUART_BUFERRINT */
/* DRVUART_MOSINT/DRVUART_THREINT/DRVUART_RDAINT/DRVUART_TOUTINT */
/* Returns: */
/* None */
/* Description: */
/* The function is used to disable UART specified interrupt, uninstall the call back */
/* function and disable NVIC UART IRQ */
/*---------------------------------------------------------------------------------------------------------*/
void DrvUART_DisableInt(E_UART_PORT u32Port,uint32_t u32InterruptFlag)
{
if(u32Port == UART_PORT0)
{
outpw(&UART0->IER + u32Port,inpw(&UART0->IER + u32Port) &~u32InterruptFlag); /* Disable INT */
}
if(u32InterruptFlag & DRVUART_TOUTINT) /* Disable Counter Enable */
{
if(u32Port == UART_PORT0)
UART0->IER.RTO_IEN = 0;
else
UART1->IER.RTO_IEN = 0;
}
switch (u32Port) /* Disable Callback function and NVIC */
{
case UART_PORT0:
g_pfnUART0callback = NULL;
NVIC_DisableIRQ(UART0_IRQn);
break;
case UART_PORT1:
g_pfnUART1callback = NULL;
NVIC_DisableIRQ(UART1_IRQn);
break;
default:
break;
}
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_ClearIntFlag */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* u32InterruptFlag -[in] Interrupt Flag : DRVUART_RLSINT_FLAG/DRVUART_MOSINT_FLAG */
/* DRVUART_BUFERRINT_FLAG */
/* Returns: */
/* E_SUCCESS Successful */
/* Description: */
/* The function is used to clear UART specified interrupt flag */
/* */
/*---------------------------------------------------------------------------------------------------------*/
uint32_t DrvUART_ClearIntFlag(E_UART_PORT u32Port,uint32_t u32InterruptFlag)
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
if((u32InterruptFlag & DRVUART_RDAINT_FLAG) ||
(u32InterruptFlag & DRVUART_THREINT_FLAG) ||
(u32InterruptFlag & DRVUART_TOUTINT_FLAG) )
{
return E_DRVUART_ARGUMENT;
}
if(u32InterruptFlag & DRVUART_RLSINT_FLAG) /* clear Receive Line Status Interrupt */
{
tUART->FSR.BIF = 1;
tUART->FSR.FEF = 1;
tUART->FSR.PEF = 1;
}
if(u32InterruptFlag & DRVUART_MOSINT_FLAG) /* clear Modem Interrupt */
tUART->MSR.DCTSF = 1;
if(u32InterruptFlag & DRVUART_BUFERRINT_FLAG) /* clear Buffer ErrorInterrupt */
{
tUART->FSR.TX_OVER_IF = 1;
tUART->FSR.RX_OVER_IF = 1;
}
return E_SUCCESS;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_GetIntStatus */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* u32InterruptFlag -[in] DRVUART_LININT_FLAG / DRVUART_BUFERRINT_FLAG */
/* DRVUART_TOUTINT_FLAG/DRVUART_MOSINT_FLAG */
/* DRVUART_RLSINT_FLAG/DRVUART_THREINT_FLAG/DRVUART_RDAINT_FLAG */
/* */
/* Returns: */
/* 0: The specified interrupt is not happened. */
/* 1: The specified interrupt is happened. */
/* E_DRVUART_ARGUMENT: Error Parameter */
/* Description: */
/* The function is used to get the interrupt status */
/*---------------------------------------------------------------------------------------------------------*/
int32_t DrvUART_GetIntStatus(E_UART_PORT u32Port,uint32_t u32InterruptFlag)
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
return (tUART->u32ISR & u32InterruptFlag)>>u32InterruptFlag ;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_GetCTSInfo */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* pu8CTSValue -[out] Buffer to store the CTS Value */
/* return current CTS pin state */
/* pu8CTSChangeState -[out] Buffer to store the CTS Change State */
/* return CTS pin status is changed or not 1:Changed 0:Not yet */
/* Returns: */
/* None */
/* Description: */
/* The function is used to get CTS pin value and detect CTS change state */
/*---------------------------------------------------------------------------------------------------------*/
void DrvUART_GetCTS(E_UART_PORT u32Port,uint8_t *pu8CTSValue, uint8_t *pu8CTSChangeState)
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
*pu8CTSValue = tUART->MSR.CTS_ST;
*pu8CTSChangeState = tUART->MSR.DCTSF;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_Read */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* pu8RxBuf -[in] Specify the buffer to receive the data of receive FIFO */
/* u32ReadBytes -[in] Specify the bytes number of data. */
/* Returns: */
/* E_SUCCESS */
/* Description: */
/* The function is used to read Rx data from RX FIFO and the data will be stored in pu8RxBuf */
/*---------------------------------------------------------------------------------------------------------*/
int32_t DrvUART_Read(E_UART_PORT u32Port,uint8_t *pu8RxBuf, uint32_t u32ReadBytes)
{
uint32_t u32Count, u32delayno;
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
for (u32Count=0; u32Count < u32ReadBytes; u32Count++)
{
u32delayno = 0;
while (tUART->FSR.RX_EMPTY ==1) /* Check RX empty => failed */
{
u32delayno++;
if ( u32delayno >= 0x40000000 )
return E_DRVUART_ERR_TIMEOUT;
}
pu8RxBuf[u32Count] = tUART->DATA; /* Get Data from UART RX */
}
return E_SUCCESS;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_Write */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* pu8RxBuf -[in] Specify the buffer to send the data to transmission FIFO. */
/* u32ReadBytes -[in] Specify the byte number of data. */
/* Returns: */
/* E_SUCCESS */
/* */
/* Description: */
/* TThe function is to write data to TX buffer to transmit data by UART */
/* Note: */
/* In IrDA Mode, the BAUD RATE configure MUST to use MODE # 0 */
/*---------------------------------------------------------------------------------------------------------*/
int32_t DrvUART_Write(E_UART_PORT u32Port,uint8_t *pu8TxBuf, uint32_t u32WriteBytes)
{
uint32_t u32Count, u32delayno;
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
for (u32Count=0; u32Count<u32WriteBytes; u32Count++)
{
u32delayno = 0;
while (tUART->FSR.TE_FLAG !=1) /* Wait Tx empty and Time-out manner */
{
u32delayno++;
if ( u32delayno >= 0x40000000 )
return E_DRVUART_ERR_TIMEOUT;
}
tUART->DATA =pu8TxBuf[u32Count]; /* Send UART Data from buffer */
}
return E_SUCCESS;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_SetFnIRDA */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* STR_IRCR_T -[in] Ther stucture of IRCR */
/* It includes of */
/* u8cTXSelect: 1: Enable Irda transmit function.(TX mode) */
/* 0: Disable Irda transmit function.(RX mode) */
/* u8cInvTX: Inverse TX signal */
/* u8cInvRX: Inverse RX signal */
/* */
/* Returns: */
/* None */
/* */
/* Description: */
/* The function is used to configure IRDA relative settings. */
/* It consists of TX or RX mode and Inverse TX or RX signals. */
/*---------------------------------------------------------------------------------------------------------*/
void DrvUART_SetFnIRDA(E_UART_PORT u32Port,STR_IRCR_T *str_IRCR )
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
tUART->FUNSEL.FUN_SEL = FUN_IRCR; /* Enable IrDA function and configure */
tUART->IRCR.TX_SELECT = (str_IRCR->u8cTXSelect) ?1:0;
tUART->IRCR.INV_TX = str_IRCR->u8cInvTX ;
tUART->IRCR.INV_RX = str_IRCR->u8cInvRX ;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_SetFnRS485 */
/* */
/* Parameter: */
/* u32Port -[in] UART Channel: UART_PORT0 / UART_PORT1 */
/* STR_RS485_T -[in] Ther stucture of RS485 */
/* It includes of */
/* u8cModeSelect: MODE_RS485_AUD / MODE_RS485_AAD */
/* MODE_RS485_NMM */
/* u8cAddrEnable: Enable or Disable RS-485 Address Detection */
/* u8cAddrValue: Match Address Value */
/* u8cDelayTime: Set transmit delay time value */
/* u8cRxDisable: Enable or Disable receiver function */
/* Returns: */
/* None */
/* */
/* Description: */
/* The function is to Set RS485 Control Register */
/*---------------------------------------------------------------------------------------------------------*/
void DrvUART_SetFnRS485(E_UART_PORT u32Port,STR_RS485_T *str_RS485)
{
UART_T * tUART;
tUART = (UART_T *)((uint32_t)UART0 + u32Port);
tUART->FUNSEL.FUN_SEL = FUN_RS485; /* Enable RS485 function and configure */
tUART->ALTCON.RS485_ADD_EN = str_RS485-> u8cAddrEnable ?1:0;
tUART->ALTCON.ADDR_MATCH = str_RS485-> u8cAddrValue ;
tUART->ALTCON.RS485_NMM = (str_RS485-> u8cModeSelect & MODE_RS485_NMM)?1:0;
tUART->ALTCON.RS485_AAD = (str_RS485-> u8cModeSelect & MODE_RS485_AAD)?1:0;
tUART->ALTCON.RS485_AUD = (str_RS485-> u8cModeSelect & MODE_RS485_AUD)?1:0;
tUART->TOR.DLY = str_RS485-> u8cDelayTime;
tUART->FCR.RX_DIS = str_RS485-> u8cRxDisable;
tUART->MCR.LEV_RTS = 0;
}
/*---------------------------------------------------------------------------------------------------------*/
/* Function: DrvUART_GetVersion */
/* */
/* Parameter: */
/* None */
/* Returns: */
/* Version Number */
/* Side effects: */
/* */
/* Description: */
/* The function is used to get DrvUART Version Number */
/*---------------------------------------------------------------------------------------------------------*/
int32_t DrvUART_GetVersion(void)
{
return DRVUART_VERSION_NUM;
}

復制代碼

ID:82781 · 發表于 2015-6-13 16:41

使用串口終端的時候，開啟端口之后，必須開啟端口之后才可以安裝IRQ和回調函數。回調函數包含一個狀態碼，在函數中只要判斷這個狀態不等于NULL，就可以進行處理。最好設置一個全局標志位，標志接受的數據是否完成，每次接受都會進入，系統自動清除，要認清他的這個特性，確保中斷的有效性！總之，又中斷就用，盡量保證實時性！

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M0的串口問題