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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_STR71x_IAR/] [Library/] [uart.c] - Blame information for rev 583

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1 577 jeremybenn 
/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
2 
* File Name          : uart.c
3 
* Author             : MCD Application Team
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* Date First Issued  : 06/08/2003
5 
* Description        : This file provides all the UART software functions
6 
********************************************************************************
7 
* History:
8 
*  30/11/2004 : V2.0
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*  14/07/2004 : V1.3
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*  01/01/2004 : V1.2
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*******************************************************************************
12 
 THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
13 
 CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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 AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
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 OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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 OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
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 CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
19 
 
20 
#include "uart.h"
21 
 
22 
extern u16 UART_FlagStatus(UART_TypeDef *UARTx);
23 
 
24 
/*******************************************************************************
25 
* Function Name  : UART_Init
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* Description    : This function initializes the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
28 
* Output         : None
29 
* Return         : None
30 
*******************************************************************************/
31 
void UART_Init(UART_TypeDef *UARTx)
32 
{
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  UARTx->IER = 0x00;
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  UARTx->CR = 0x00;
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  (void)UARTx->RxBUFR;
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  UARTx->RxRSTR = 0xFFFF;
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  UARTx->TxRSTR = 0xFFFF;
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}
39 
 
40 
/*******************************************************************************
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* Function Name  : UART_BaudRateConfig
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* Description    : This function configures the baud rate of the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : The baudrate value
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* Output         : None
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* Return         : None
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*******************************************************************************/
48 
void UART_BaudRateConfig(UART_TypeDef *UARTx, u32 BaudRate)
49 
{
50 
  UARTx->BR = (u16)(RCCU_FrequencyValue(RCCU_FCLK)/(16*BaudRate));
51 
}
52 
 
53 
/*******************************************************************************
54 
* Function Name  : UART_Config
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* Description    : This function configures the baudrate, the mode, the data
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*                  parity and the number of stop bits of the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
58 
* Input 2        : The baudrate value
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* Input 3        : The parity type
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* Input 4        : The number of stop bits
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* Input 5        : The UART mode
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* Output         : None
63 
* Return         : None
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*******************************************************************************/
65 
void UART_Config(UART_TypeDef *UARTx, u32 BaudRate, UARTParity_TypeDef Parity,
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                 UARTStopBits_TypeDef StopBits, UARTMode_TypeDef Mode)
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{
68 
  UART_ModeConfig(UARTx, Mode);
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  UART_BaudRateConfig(UARTx, BaudRate);
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  UART_ParityConfig(UARTx, Parity);
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  UART_StopBitsConfig(UARTx, StopBits);
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}
73 
 
74 
/*******************************************************************************
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* Function Name  : UART_ItConfig
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* Description    : This function enables or disables the interrupts of the
77 
*                  selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2        : The new interrupt flag
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* Input 3        : ENABLE or DISABLE
81 
* Output         : None
82 
* Return         : None
83 
*******************************************************************************/
84 
void UART_ItConfig(UART_TypeDef *UARTx, u16 UART_Flag, FunctionalState NewState)
85 
{
86 
  if (NewState==ENABLE) UARTx->IER|=UART_Flag; else UARTx->IER&=~UART_Flag;
87 
}
88 
 
89 
/*******************************************************************************
90 
* Function Name  : UART_FifoConfig
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* Description    : This function enables or disables the Rx and Tx FIFOs of
92 
*                  the selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
94 
* Input 2        : ENABLE or DISABLE
95 
* Output         : None
96 
* Return         : None
97 
*******************************************************************************/
98 
void UART_FifoConfig(UART_TypeDef *UARTx, FunctionalState NewState)
99 
{
100 
  if (NewState==ENABLE) UARTx->CR|=0x0400; else UARTx->CR&=~0x0400;
101 
}
102 
 
103 
/*******************************************************************************
104 
* Function Name  : UART_FifoReset
105 
* Description    : This function resets the Rx and the Tx FIFOs of the
106 
*                  selected UART.
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* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
108 
* Input 2        : UART_RxFIFO or UART_TxFIFO
109 
* Output         : None
110 
* Return         : None
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*******************************************************************************/
112 
void UART_FifoReset(UART_TypeDef *UARTx, UARTFIFO_TypeDef FIFO)
113 
{
114 
  if (FIFO==UART_RxFIFO) UARTx->RxRSTR=0xFFFF; else UARTx->TxRSTR=0xFFFF;
115 
}
116 
 
117 
/*******************************************************************************
118 
* Function Name  : UART_LoopBackConfig
119 
* Description    : This function enables or disables the loop back mode of
120 
*                  the selected UART.
121 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
122 
* Input 2        : ENABLE or DISABLE
123 
* Output         : None
124 
* Return         : None
125 
*******************************************************************************/
126 
void UART_LoopBackConfig(UART_TypeDef *UARTx, FunctionalState NewState)
127 
{
128 
  if (NewState==ENABLE) UARTx->CR|=0x0040; else UARTx->CR&=~0x0040;
129 
}
130 
 
131 
/*******************************************************************************
132 
* Function Name  : UART_RxConfig
133 
* Description    : This function enables or disables the UART data reception.
134 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
135 
* Input 2        : ENABLE or DISABLE
136 
* Output         : None
137 
* Return         : None
138 
*******************************************************************************/
139 
void UART_RxConfig(UART_TypeDef *UARTx, FunctionalState NewState)
140 
{
141 
  if (NewState==ENABLE) UARTx->CR|=0x0100; else UARTx->CR&=~0x0100;
142 
}
143 
 
144 
/*******************************************************************************
145 
* Function Name  : UART_OnOffConfig
146 
* Description    : This function sets On/Off the selected UART.
147 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
148 
* Input 2        : ENABLE or DISABLE
149 
* Output         : None
150 
* Return         : None
151 
*******************************************************************************/
152 
void UART_OnOffConfig(UART_TypeDef *UARTx, FunctionalState NewState)
153 
{
154 
  if (NewState==ENABLE) UARTx->CR|=0x0080; else UARTx->CR&=~0x0080;
155 
}
156 
 
157 
/*******************************************************************************
158 
* Function Name  : UART_ByteSend
159 
* Description    : This function sends a data byte to the selected UART.
160 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
161 
* Input 2        : A pointer to the data byte to send
162 
* Output         : None
163 
* Return         : None
164 
*******************************************************************************/
165 
void UART_ByteSend(UART_TypeDef *UARTx, u8 *Data)
166 
{
167 
  if (UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
168 
    while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
169 
  else                  // if FIFO DISABLED
170 
    while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
171 
  UARTx->TxBUFR = *Data;
172 
}
173 
 
174 
/*******************************************************************************
175 
* Function Name  : UART_9BitByteSend
176 
* Description    : This function sends a 9 bits data byte to the selected UART.
177 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
178 
* Input 2        : A pointer to the data to send
179 
* Output         : None
180 
* Return         : None
181 
*******************************************************************************/
182 
void UART_9BitByteSend(UART_TypeDef *UARTx, u16 *Data)
183 
{
184 
  if(UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
185 
    while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
186 
  else                  // if FIFO DISABLED
187 
    while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
188 
  UARTx->TxBUFR = *Data;
189 
}
190 
 
191 
/*******************************************************************************
192 
* Function Name  : UART_DataSend
193 
* Description    : This function sends several data bytes to the selected UART.
194 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
195 
* Input 2        : A pointer to the data to send
196 
* Input 3        : The data length in bytes
197 
* Output         : None
198 
* Return         : None
199 
*******************************************************************************/
200 
void UART_DataSend(UART_TypeDef *UARTx, u8 *Data, u8 DataLength)
201 
{
202 
  while(DataLength--)
203 
  {
204 
    UART_ByteSend(UARTx,Data);
205 
    Data++;
206 
  }
207 
}
208 
 
209 
/*******************************************************************************
210 
* Function Name  : UART_9BitDataSend
211 
* Description    : This function sends several 9 bits data bytes to the selected UART.
212 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
213 
* Input 2        : A pointer to the data to send
214 
* Input 3        : The data length
215 
* Output         : None
216 
* Return         : None
217 
*******************************************************************************/
218 
void UART_9BitDataSend(UART_TypeDef *UARTx, u16 *Data, u8 DataLength)
219 
{
220 
  while(DataLength--)
221 
  {
222 
    UART_9BitByteSend(UARTx,Data);
223 
    Data++;
224 
  }
225 
}
226 
 
227 
/*******************************************************************************
228 
* Function Name  : UART_StringSend
229 
* Description    : This function sends a string to the selected UART.
230 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
231 
* Input 2        : A pointer to the string to send
232 
* Output         : None
233 
* Return         : None
234 
*******************************************************************************/
235 
void UART_StringSend(UART_TypeDef *UARTx, u8 *String)
236 
{
237 
  u8 *Data=String;
238 
  while(*Data != '\0')
239 
    UART_ByteSend(UARTx, Data++);
240 
  *Data='\0';
241 
  UART_ByteSend(UARTx, Data);
242 
}
243 
 
244 
/*******************************************************************************
245 
* Function Name  : UART_ByteReceive
246 
* Description    : This function gets a data byte from the selected UART.
247 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
248 
* Input 2        : A pointer to the buffer where the data will be stored
249 
* Input 3        : The time-out period
250 
* Output         : The received data
251 
* Return         : The UARTx.SR register contents
252 
*******************************************************************************/
253 
u16 UART_ByteReceive(UART_TypeDef *UARTx, u8 *Data, u8 TimeOut)
254 
{
255 
   u16 wStatus;
256 
   UARTx->TOR=TimeOut;// reload the Timeout counter
257 
   while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
258 
   *Data = (u8)UARTx->RxBUFR; // then read the Receive Buffer Register
259 
   return wStatus;
260 
}
261 
 
262 
/*******************************************************************************
263 
* Function Name  : UART_9BitByteReceive
264 
* Description    : This function gets a 9 bits data byte from the selected UART.
265 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
266 
* Input 2        : A pointer to the buffer where the data will be stored
267 
* Input 3        : The time-out period value
268 
* Output         : The received data
269 
* Return         : The UARTx.SR register contents
270 
*******************************************************************************/
271 
u16 UART_9BitByteReceive(UART_TypeDef *UARTx, u16 *Data, u8 TimeOut)
272 
{
273 
  u16 wStatus;
274 
  UARTx->TOR=TimeOut;// reload the Timeout counter
275 
  while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
276 
  *Data = (u16)UARTx->RxBUFR; // then read the RxBUFR
277 
  return wStatus;
278 
}
279 
 
280 
/*******************************************************************************
281 
* Function Name  : UART_DataReceive
282 
* Description    : This function gets 8 bits data bytes from the selected UART.
283 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
284 
* Input 2        : A pointer to the buffer where the data will be stored
285 
* Input 3        : The data length
286 
* Input 4        : The time-out period value
287 
* Output         : The received data
288 
* Return         : The UARTx.SR register contents
289 
*******************************************************************************/
290 
u16 UART_DataReceive(UART_TypeDef *UARTx, u8 *Data, u8 DataLength, u8 TimeOut)
291 
{
292 
  u16 wStatus;
293 
  while(DataLength--)
294 
    wStatus=UART_ByteReceive(UARTx,Data++,TimeOut);
295 
  return wStatus;
296 
}
297 
 
298 
/*******************************************************************************
299 
* Function Name  : UART_9BitDataReceive
300 
* Description    : This function gets 9 bits data bytes from the selected UART.
301 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
302 
* Input 2        : A pointer to the buffer where the data will be stored
303 
* Input 3        : The data length
304 
* Input 4        : The time-out value
305 
* Output         : The received data
306 
* Return         : The UARTx.SR register contents
307 
*******************************************************************************/
308 
u16 UART_9BitDataReceive(UART_TypeDef *UARTx, u16 *Data, u8 DataLength, u8 TimeOut)
309 
{
310 
  u16 wStatus;
311 
  while(DataLength--)
312 
    wStatus=UART_9BitByteReceive(UARTx,Data++,TimeOut);
313 
  return wStatus;
314 
}
315 
 
316 
/*******************************************************************************
317 
* Function Name  : UART_StringReceive
318 
* Description    : This function gets 8 bits data bytes from the selected UART.
319 
* Input 1        : UARTx (x can be 0,1, 2 or 3) the desired UART
320 
* Input 2        : A pointer to the buffer where the string will be stored
321 
* Output         : The received string
322 
* Return         : The UARTx.SR register contents
323 
*******************************************************************************/
324 
u16 UART_StringReceive(UART_TypeDef *UARTx, u8 *Data)
325 
{
326 
  u8 *pSTRING=Data;
327 
  u16 wStatus;
328 
  do
329 
  {
330 
    while (!((wStatus=UARTx->SR) & (UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
331 
    *(pSTRING++) = (u8)UARTx->RxBUFR; // then read the RxBUFR
332 
  } while((*(pSTRING - 1)!=0x0D)&(*(pSTRING - 1)!='\0'));
333 
  *(pSTRING - 1)='\0';
334 
  return wStatus;
335 
}
336 
 
337 
#ifdef USE_SERIAL_PORT
338 
/*******************************************************************************
339 
* Function Name  : sendchar
340 
* Description    : This function sends a character to the selected UART.
341 
* Input 1        : A pointer to the character to send.
342 
* Output         : None
343 
* Return         : None
344 
*******************************************************************************/
345 
void sendchar( char *ch )
346 
{
347 
   #ifdef USE_UART0
348 
     #define  UARTx  UART0
349 
   #endif /* Use_UART0 */
350 
 
351 
   #ifdef USE_UART1
352 
     #define  UARTx  UART1
353 
   #endif /* Use_UART1 */
354 
 
355 
   #ifdef USE_UART2
356 
     #define  UARTx  UART2
357 
   #endif /* Use_UART2 */
358 
 
359 
   #ifdef USE_UART3
360 
     #define  UARTx  UART3
361 
   #endif /* Use_UART3 */
362 
 
363 
   UART_ByteSend(UARTx,(u8 *)ch);
364 
}
365 
#endif /* USE_SERIAL_PORT */
366 
 
367 
/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/

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