1 /**************************************************************************//**
2 * @file usci_uart.c
3 * @version V3.00
4 * @brief M460 series USCI UART (UUART) driver source file
5 *
6 * @copyright SPDX-License-Identifier: Apache-2.0
7 * @copyright Copyright (C) 2021 Nuvoton Technology Corp. All rights reserved.
8 *****************************************************************************/
9
10 #include <stdio.h>
11 #include "NuMicro.h"
12
13 /** @addtogroup Standard_Driver Standard Driver
14 @{
15 */
16
17 /** @addtogroup USCI_UART_Driver USCI_UART Driver
18 @{
19 */
20
21 /** @addtogroup USCI_UART_EXPORTED_FUNCTIONS USCI_UART Exported Functions
22 @{
23 */
24
25 /**
26 * @brief Clear USCI_UART specified interrupt flag
27 *
28 * @param[in] uuart The pointer of the specified USCI_UART module.
29 * @param[in] u32Mask The combination of all related interrupt sources.
30 * Each bit corresponds to a interrupt source.
31 * This parameter decides which interrupt flags will be cleared. It could be the combination of:
32 * - \ref UUART_ABR_INT_MASK
33 * - \ref UUART_RLS_INT_MASK
34 * - \ref UUART_BUF_RXOV_INT_MASK
35 * - \ref UUART_TXST_INT_MASK
36 * - \ref UUART_TXEND_INT_MASK
37 * - \ref UUART_RXST_INT_MASK
38 * - \ref UUART_RXEND_INT_MASK
39 *
40 * @return None
41 *
42 * @details The function is used to clear USCI_UART related interrupt flags specified by u32Mask parameter.
43 */
44
UUART_ClearIntFlag(UUART_T * uuart,uint32_t u32Mask)45 void UUART_ClearIntFlag(UUART_T* uuart, uint32_t u32Mask)
46 {
47
48 if(u32Mask & UUART_ABR_INT_MASK) /* Clear Auto-baud Rate Interrupt */
49 {
50 uuart->PROTSTS = UUART_PROTSTS_ABRDETIF_Msk;
51 }
52
53 if(u32Mask & UUART_RLS_INT_MASK) /* Clear Receive Line Status Interrupt */
54 {
55 uuart->PROTSTS = (UUART_PROTSTS_BREAK_Msk | UUART_PROTSTS_FRMERR_Msk | UUART_PROTSTS_PARITYERR_Msk);
56 }
57
58 if(u32Mask & UUART_BUF_RXOV_INT_MASK) /* Clear Receive Buffer Over-run Error Interrupt */
59 {
60 uuart->BUFSTS = UUART_BUFSTS_RXOVIF_Msk;
61 }
62
63 if(u32Mask & UUART_TXST_INT_MASK) /* Clear Transmit Start Interrupt */
64 {
65 uuart->PROTSTS = UUART_PROTSTS_TXSTIF_Msk;
66 }
67
68 if(u32Mask & UUART_TXEND_INT_MASK) /* Clear Transmit End Interrupt */
69 {
70 uuart->PROTSTS = UUART_PROTSTS_TXENDIF_Msk;
71 }
72
73 if(u32Mask & UUART_RXST_INT_MASK) /* Clear Receive Start Interrupt */
74 {
75 uuart->PROTSTS = UUART_PROTSTS_RXSTIF_Msk;
76 }
77
78 if(u32Mask & UUART_RXEND_INT_MASK) /* Clear Receive End Interrupt */
79 {
80 uuart->PROTSTS = UUART_PROTSTS_RXENDIF_Msk;
81 }
82
83 }
84
85 /**
86 * @brief Get USCI_UART specified interrupt flag
87 *
88 * @param[in] uuart The pointer of the specified USCI_UART module.
89 * @param[in] u32Mask The combination of all related interrupt sources.
90 * Each bit corresponds to a interrupt source.
91 * This parameter decides which interrupt flags will be read. It is combination of:
92 * - \ref UUART_ABR_INT_MASK
93 * - \ref UUART_RLS_INT_MASK
94 * - \ref UUART_BUF_RXOV_INT_MASK
95 * - \ref UUART_TXST_INT_MASK
96 * - \ref UUART_TXEND_INT_MASK
97 * - \ref UUART_RXST_INT_MASK
98 * - \ref UUART_RXEND_INT_MASK
99 *
100 * @return Interrupt flags of selected sources.
101 *
102 * @details The function is used to get USCI_UART related interrupt flags specified by u32Mask parameter.
103 */
104
UUART_GetIntFlag(UUART_T * uuart,uint32_t u32Mask)105 uint32_t UUART_GetIntFlag(UUART_T* uuart, uint32_t u32Mask)
106 {
107 uint32_t u32IntFlag = 0ul;
108 uint32_t u32Tmp1, u32Tmp2;
109
110 /* Check Auto-baud Rate Interrupt Flag */
111 u32Tmp1 = (u32Mask & UUART_ABR_INT_MASK);
112 u32Tmp2 = (uuart->PROTSTS & UUART_PROTSTS_ABRDETIF_Msk);
113 if(u32Tmp1 && u32Tmp2)
114 {
115 u32IntFlag |= UUART_ABR_INT_MASK;
116 }
117
118 /* Check Receive Line Status Interrupt Flag */
119 u32Tmp1 = (u32Mask & UUART_RLS_INT_MASK);
120 u32Tmp2 = (uuart->PROTSTS & (UUART_PROTSTS_BREAK_Msk | UUART_PROTSTS_FRMERR_Msk | UUART_PROTSTS_PARITYERR_Msk));
121 if(u32Tmp1 && u32Tmp2)
122 {
123 u32IntFlag |= UUART_RLS_INT_MASK;
124 }
125
126 /* Check Receive Buffer Over-run Error Interrupt Flag */
127 u32Tmp1 = (u32Mask & UUART_BUF_RXOV_INT_MASK);
128 u32Tmp2 = (uuart->BUFSTS & UUART_BUFSTS_RXOVIF_Msk);
129 if(u32Tmp1 && u32Tmp2)
130 {
131 u32IntFlag |= UUART_BUF_RXOV_INT_MASK;
132 }
133
134 /* Check Transmit Start Interrupt Flag */
135 u32Tmp1 = (u32Mask & UUART_TXST_INT_MASK);
136 u32Tmp2 = (uuart->PROTSTS & UUART_PROTSTS_TXSTIF_Msk);
137 if(u32Tmp1 && u32Tmp2)
138 {
139 u32IntFlag |= UUART_TXST_INT_MASK;
140 }
141
142 /* Check Transmit End Interrupt Flag */
143 u32Tmp1 = (u32Mask & UUART_TXEND_INT_MASK);
144 u32Tmp2 = (uuart->PROTSTS & UUART_PROTSTS_TXENDIF_Msk);
145 if(u32Tmp1 && u32Tmp2)
146 {
147 u32IntFlag |= UUART_TXEND_INT_MASK;
148 }
149
150 /* Check Receive Start Interrupt Flag */
151 u32Tmp1 = (u32Mask & UUART_RXST_INT_MASK);
152 u32Tmp2 = (uuart->PROTSTS & UUART_PROTSTS_RXSTIF_Msk);
153 if(u32Tmp1 && u32Tmp2)
154 {
155 u32IntFlag |= UUART_RXST_INT_MASK;
156 }
157
158 /* Check Receive End Interrupt Flag */
159 u32Tmp1 = (u32Mask & UUART_RXEND_INT_MASK);
160 u32Tmp2 = (uuart->PROTSTS & UUART_PROTSTS_RXENDIF_Msk);
161 if(u32Tmp1 && u32Tmp2)
162 {
163 u32IntFlag |= UUART_RXEND_INT_MASK;
164 }
165
166 return u32IntFlag;
167
168 }
169
170
171 /**
172 * @brief Disable USCI_UART function mode
173 *
174 * @param[in] uuart The pointer of the specified USCI_UART module.
175 *
176 * @return None
177 *
178 * @details The function is used to disable USCI_UART function mode.
179 */
UUART_Close(UUART_T * uuart)180 void UUART_Close(UUART_T* uuart)
181 {
182 uuart->CTL = 0ul;
183 }
184
185
186 /**
187 * @brief Disable interrupt function.
188 *
189 * @param[in] uuart The pointer of the specified USCI_UART module.
190 * @param[in] u32Mask The combination of all related interrupt enable bits.
191 * Each bit corresponds to a interrupt enable bit.
192 * This parameter decides which interrupts will be disabled. It is combination of:
193 * - \ref UUART_ABR_INT_MASK
194 * - \ref UUART_RLS_INT_MASK
195 * - \ref UUART_BUF_RXOV_INT_MASK
196 * - \ref UUART_TXST_INT_MASK
197 * - \ref UUART_TXEND_INT_MASK
198 * - \ref UUART_RXST_INT_MASK
199 * - \ref UUART_RXEND_INT_MASK
200 *
201 * @return None
202 *
203 * @details The function is used to disabled USCI_UART related interrupts specified by u32Mask parameter.
204 */
UUART_DisableInt(UUART_T * uuart,uint32_t u32Mask)205 void UUART_DisableInt(UUART_T* uuart, uint32_t u32Mask)
206 {
207
208 /* Disable Auto-baud rate interrupt flag */
209 if((u32Mask & UUART_ABR_INT_MASK) == UUART_ABR_INT_MASK)
210 {
211 uuart->PROTIEN &= ~UUART_PROTIEN_ABRIEN_Msk;
212 }
213
214 /* Disable receive line status interrupt flag */
215 if((u32Mask & UUART_RLS_INT_MASK) == UUART_RLS_INT_MASK)
216 {
217 uuart->PROTIEN &= ~UUART_PROTIEN_RLSIEN_Msk;
218 }
219
220 /* Disable RX overrun interrupt flag */
221 if((u32Mask & UUART_BUF_RXOV_INT_MASK) == UUART_BUF_RXOV_INT_MASK)
222 {
223 uuart->BUFCTL &= ~UUART_BUFCTL_RXOVIEN_Msk;
224 }
225
226 /* Disable TX start interrupt flag */
227 if((u32Mask & UUART_TXST_INT_MASK) == UUART_TXST_INT_MASK)
228 {
229 uuart->INTEN &= ~UUART_INTEN_TXSTIEN_Msk;
230 }
231
232 /* Disable TX end interrupt flag */
233 if((u32Mask & UUART_TXEND_INT_MASK) == UUART_TXEND_INT_MASK)
234 {
235 uuart->INTEN &= ~UUART_INTEN_TXENDIEN_Msk;
236 }
237
238 /* Disable RX start interrupt flag */
239 if((u32Mask & UUART_RXST_INT_MASK) == UUART_RXST_INT_MASK)
240 {
241 uuart->INTEN &= ~UUART_INTEN_RXSTIEN_Msk;
242 }
243
244 /* Disable RX end interrupt flag */
245 if((u32Mask & UUART_RXEND_INT_MASK) == UUART_RXEND_INT_MASK)
246 {
247 uuart->INTEN &= ~UUART_INTEN_RXENDIEN_Msk;
248 }
249 }
250
251
252 /**
253 * @brief Enable interrupt function.
254 *
255 * @param[in] uuart The pointer of the specified USCI_UART module.
256 * @param[in] u32Mask The combination of all related interrupt enable bits.
257 * Each bit corresponds to a interrupt enable bit.
258 * This parameter decides which interrupts will be enabled. It is combination of:
259 * - \ref UUART_ABR_INT_MASK
260 * - \ref UUART_RLS_INT_MASK
261 * - \ref UUART_BUF_RXOV_INT_MASK
262 * - \ref UUART_TXST_INT_MASK
263 * - \ref UUART_TXEND_INT_MASK
264 * - \ref UUART_RXST_INT_MASK
265 * - \ref UUART_RXEND_INT_MASK
266 *
267 * @return None
268 *
269 * @details The function is used to enable USCI_UART related interrupts specified by u32Mask parameter.
270 */
UUART_EnableInt(UUART_T * uuart,uint32_t u32Mask)271 void UUART_EnableInt(UUART_T* uuart, uint32_t u32Mask)
272 {
273 /* Enable Auto-baud rate interrupt flag */
274 if((u32Mask & UUART_ABR_INT_MASK) == UUART_ABR_INT_MASK)
275 {
276 uuart->PROTIEN |= UUART_PROTIEN_ABRIEN_Msk;
277 }
278
279 /* Enable receive line status interrupt flag */
280 if((u32Mask & UUART_RLS_INT_MASK) == UUART_RLS_INT_MASK)
281 {
282 uuart->PROTIEN |= UUART_PROTIEN_RLSIEN_Msk;
283 }
284
285 /* Enable RX overrun interrupt flag */
286 if((u32Mask & UUART_BUF_RXOV_INT_MASK) == UUART_BUF_RXOV_INT_MASK)
287 {
288 uuart->BUFCTL |= UUART_BUFCTL_RXOVIEN_Msk;
289 }
290
291 /* Enable TX start interrupt flag */
292 if((u32Mask & UUART_TXST_INT_MASK) == UUART_TXST_INT_MASK)
293 {
294 uuart->INTEN |= UUART_INTEN_TXSTIEN_Msk;
295 }
296
297 /* Enable TX end interrupt flag */
298 if((u32Mask & UUART_TXEND_INT_MASK) == UUART_TXEND_INT_MASK)
299 {
300 uuart->INTEN |= UUART_INTEN_TXENDIEN_Msk;
301 }
302
303 /* Enable RX start interrupt flag */
304 if((u32Mask & UUART_RXST_INT_MASK) == UUART_RXST_INT_MASK)
305 {
306 uuart->INTEN |= UUART_INTEN_RXSTIEN_Msk;
307 }
308
309 /* Enable RX end interrupt flag */
310 if((u32Mask & UUART_RXEND_INT_MASK) == UUART_RXEND_INT_MASK)
311 {
312 uuart->INTEN |= UUART_INTEN_RXENDIEN_Msk;
313 }
314 }
315
316
317 /**
318 * @brief Open and set USCI_UART function
319 *
320 * @param[in] uuart The pointer of the specified USCI_UART module.
321 * @param[in] u32baudrate The baud rate of USCI_UART module.
322 *
323 * @return Real baud rate of USCI_UART module.
324 *
325 * @details This function use to enable USCI_UART function and set baud-rate.
326 */
UUART_Open(UUART_T * uuart,uint32_t u32baudrate)327 uint32_t UUART_Open(UUART_T* uuart, uint32_t u32baudrate)
328 {
329 uint32_t u32PCLKFreq, u32PDSCnt, u32DSCnt, u32ClkDiv;
330 uint32_t u32Tmp, u32Tmp2, u32Min, u32MinClkDiv, u32MinDSCnt;
331 uint32_t u32Div;
332
333 /* Get PCLK frequency */
334 u32PCLKFreq = CLK_GetPCLK0Freq();
335
336 /* Calculate baud rate divider */
337 u32Div = u32PCLKFreq / u32baudrate;
338 u32Tmp = (u32PCLKFreq / u32Div) - u32baudrate;
339 u32Tmp2 = u32baudrate - (u32PCLKFreq / (u32Div + 1ul));
340
341 if(u32Tmp >= u32Tmp2) u32Div = u32Div + 1ul;
342
343 if(u32Div >= 65536ul)
344 {
345
346 /* Set the smallest baud rate that USCI_UART can generate */
347 u32PDSCnt = 0x4ul;
348 u32MinDSCnt = 0x10ul;
349 u32MinClkDiv = 0x400ul;
350
351 }
352 else
353 {
354
355 u32Tmp = 0x400ul * 0x10ul;
356 for(u32PDSCnt = 1ul; u32PDSCnt <= 0x04ul; u32PDSCnt++)
357 {
358 if(u32Div <= (u32Tmp * u32PDSCnt)) break;
359 }
360
361 if(u32PDSCnt > 0x4ul) u32PDSCnt = 0x4ul;
362
363 u32Div = u32Div / u32PDSCnt;
364
365 /* Find best solution */
366 u32Min = (uint32_t) - 1;
367 u32MinDSCnt = 0ul;
368 u32MinClkDiv = 0ul;
369 u32Tmp = 0ul;
370
371 for(u32DSCnt = 6ul; u32DSCnt <= 0x10ul; u32DSCnt++) /* DSCNT could be 0x5~0xF */
372 {
373
374 u32ClkDiv = u32Div / u32DSCnt;
375
376 if(u32ClkDiv > 0x400ul)
377 {
378 u32ClkDiv = 0x400ul;
379 u32Tmp = u32Div - (u32ClkDiv * u32DSCnt);
380 u32Tmp2 = u32Tmp + 1ul;
381 }
382 else
383 {
384 u32Tmp = u32Div - (u32ClkDiv * u32DSCnt);
385 u32Tmp2 = ((u32ClkDiv+1ul) * u32DSCnt) - u32Div;
386 }
387
388 if(u32Tmp >= u32Tmp2)
389 {
390 u32ClkDiv = u32ClkDiv + 1ul;
391 }
392 else u32Tmp2 = u32Tmp;
393
394 if(u32Tmp2 < u32Min)
395 {
396 u32Min = u32Tmp2;
397 u32MinDSCnt = u32DSCnt;
398 u32MinClkDiv = u32ClkDiv;
399
400 /* Break when get good results */
401 if(u32Min == 0ul)
402 {
403 break;
404 }
405 }
406 }
407 }
408
409 /* Enable USCI_UART protocol */
410 uuart->CTL &= ~UUART_CTL_FUNMODE_Msk;
411 uuart->CTL = 2ul << UUART_CTL_FUNMODE_Pos;
412
413 /* Set USCI_UART line configuration */
414 uuart->LINECTL = UUART_WORD_LEN_8 | UUART_LINECTL_LSB_Msk;
415 uuart->DATIN0 = (2ul << UUART_DATIN0_EDGEDET_Pos); /* Set falling edge detection */
416
417 /* Set USCI_UART baud rate */
418 uuart->BRGEN = ((u32MinClkDiv-1ul) << UUART_BRGEN_CLKDIV_Pos) |
419 ((u32MinDSCnt-1ul) << UUART_BRGEN_DSCNT_Pos) |
420 ((u32PDSCnt-1ul) << UUART_BRGEN_PDSCNT_Pos);
421
422 uuart->PROTCTL |= UUART_PROTCTL_PROTEN_Msk;
423
424 return (u32PCLKFreq/u32PDSCnt/u32MinDSCnt/u32MinClkDiv);
425 }
426
427
428 /**
429 * @brief Read USCI_UART data
430 *
431 * @param[in] uuart The pointer of the specified USCI_UART module.
432 * @param[in] pu8RxBuf The buffer to receive the data of receive buffer.
433 * @param[in] u32ReadBytes The read bytes number of data.
434 *
435 * @return Receive byte count
436 *
437 * @details The function is used to read Rx data from RX buffer and the data will be stored in pu8RxBuf.
438 */
UUART_Read(UUART_T * uuart,uint8_t pu8RxBuf[],uint32_t u32ReadBytes)439 uint32_t UUART_Read(UUART_T* uuart, uint8_t pu8RxBuf[], uint32_t u32ReadBytes)
440 {
441 uint32_t u32Count, u32delayno;
442
443 for(u32Count = 0ul; u32Count < u32ReadBytes; u32Count++)
444 {
445 u32delayno = 0ul;
446
447 while(uuart->BUFSTS & UUART_BUFSTS_RXEMPTY_Msk) /* Check RX empty => failed */
448 {
449 u32delayno++;
450 if(u32delayno >= 0x40000000ul)
451 {
452 break;
453 }
454 }
455
456 if(u32delayno >= 0x40000000ul)
457 {
458 break;
459 }
460
461 pu8RxBuf[u32Count] = (uint8_t)uuart->RXDAT; /* Get Data from USCI RX */
462 }
463
464 return u32Count;
465
466 }
467
468
469 /**
470 * @brief Set USCI_UART line configuration
471 *
472 * @param[in] uuart The pointer of the specified USCI_UART module.
473 * @param[in] u32baudrate The register value of baud rate of USCI_UART module.
474 * If u32baudrate = 0, USCI_UART baud rate will not change.
475 * @param[in] u32data_width The data length of USCI_UART module.
476 * - \ref UUART_WORD_LEN_6
477 * - \ref UUART_WORD_LEN_7
478 * - \ref UUART_WORD_LEN_8
479 * - \ref UUART_WORD_LEN_9
480 * @param[in] u32parity The parity setting (none/odd/even) of USCI_UART module.
481 * - \ref UUART_PARITY_NONE
482 * - \ref UUART_PARITY_ODD
483 * - \ref UUART_PARITY_EVEN
484 * @param[in] u32stop_bits The stop bit length (1/2 bit) of USCI_UART module.
485 * - \ref UUART_STOP_BIT_1
486 * - \ref UUART_STOP_BIT_2
487 *
488 * @return Real baud rate of USCI_UART module.
489 *
490 * @details This function use to config USCI_UART line setting.
491 */
UUART_SetLine_Config(UUART_T * uuart,uint32_t u32baudrate,uint32_t u32data_width,uint32_t u32parity,uint32_t u32stop_bits)492 uint32_t UUART_SetLine_Config(UUART_T* uuart, uint32_t u32baudrate, uint32_t u32data_width, uint32_t u32parity, uint32_t u32stop_bits)
493 {
494 uint32_t u32PCLKFreq, u32PDSCnt, u32DSCnt, u32ClkDiv;
495 uint32_t u32Tmp, u32Tmp2, u32Min, u32MinClkDiv, u32MinDSCnt;
496 uint32_t u32Div;
497
498 /* Get PCLK frequency */
499 u32PCLKFreq = CLK_GetPCLK0Freq();
500
501
502 if(u32baudrate != 0ul)
503 {
504
505 /* Calculate baud rate divider */
506 u32Div = u32PCLKFreq / u32baudrate;
507 u32Tmp = (u32PCLKFreq / u32Div) - u32baudrate;
508 u32Tmp2 = u32baudrate - (u32PCLKFreq / (u32Div+1ul));
509
510 if(u32Tmp >= u32Tmp2) u32Div = u32Div + 1ul;
511
512 if(u32Div >= 65536ul)
513 {
514
515 /* Set the smallest baud rate that USCI_UART can generate */
516 u32PDSCnt = 0x4ul;
517 u32MinDSCnt = 0x10ul;
518 u32MinClkDiv = 0x400ul;
519
520 }
521 else
522 {
523 u32Tmp = 0x400ul * 0x10ul;
524 for(u32PDSCnt = 1ul; u32PDSCnt <= 0x04ul; u32PDSCnt++)
525 {
526 if(u32Div <= (u32Tmp * u32PDSCnt)) break;
527 }
528
529 if(u32PDSCnt > 0x4ul) u32PDSCnt = 0x4ul;
530
531 u32Div = u32Div / u32PDSCnt;
532
533 /* Find best solution */
534 u32Min = (uint32_t) - 1;
535 u32MinDSCnt = 0ul;
536 u32MinClkDiv = 0ul;
537
538 for(u32DSCnt = 6ul; u32DSCnt <= 0x10ul; u32DSCnt++) /* DSCNT could be 0x5~0xF */
539 {
540 u32ClkDiv = u32Div / u32DSCnt;
541
542 if(u32ClkDiv > 0x400ul)
543 {
544 u32ClkDiv = 0x400ul;
545 u32Tmp = u32Div - (u32ClkDiv * u32DSCnt);
546 u32Tmp2 = u32Tmp + 1ul;
547 }
548 else
549 {
550 u32Tmp = u32Div - (u32ClkDiv * u32DSCnt);
551 u32Tmp2 = ((u32ClkDiv+1ul) * u32DSCnt) - u32Div;
552 }
553
554 if(u32Tmp >= u32Tmp2)
555 {
556 u32ClkDiv = u32ClkDiv + 1ul;
557 }
558 else u32Tmp2 = u32Tmp;
559
560 if(u32Tmp2 < u32Min)
561 {
562 u32Min = u32Tmp2;
563 u32MinDSCnt = u32DSCnt;
564 u32MinClkDiv = u32ClkDiv;
565
566 /* Break when get good results */
567 if(u32Min == 0ul)
568 {
569 break;
570 }
571 }
572 }
573
574 }
575
576 /* Set USCI_UART baud rate */
577 uuart->BRGEN = ((u32MinClkDiv - 1ul) << UUART_BRGEN_CLKDIV_Pos) |
578 ((u32MinDSCnt - 1ul) << UUART_BRGEN_DSCNT_Pos) |
579 ((u32PDSCnt - 1ul) << UUART_BRGEN_PDSCNT_Pos);
580 }
581 else
582 {
583 u32PDSCnt = ((uuart->BRGEN & UUART_BRGEN_PDSCNT_Msk) >> UUART_BRGEN_PDSCNT_Pos) + 1ul;
584 u32MinDSCnt = ((uuart->BRGEN & UUART_BRGEN_DSCNT_Msk) >> UUART_BRGEN_DSCNT_Pos) + 1ul;
585 u32MinClkDiv = ((uuart->BRGEN & UUART_BRGEN_CLKDIV_Msk) >> UUART_BRGEN_CLKDIV_Pos) + 1ul;
586 }
587
588 /* Set USCI_UART line configuration */
589 uuart->LINECTL = (uuart->LINECTL & ~UUART_LINECTL_DWIDTH_Msk) | u32data_width;
590 uuart->PROTCTL = (uuart->PROTCTL & ~(UUART_PROTCTL_STICKEN_Msk | UUART_PROTCTL_EVENPARITY_Msk |
591 UUART_PROTCTL_PARITYEN_Msk)) | u32parity;
592 uuart->PROTCTL = (uuart->PROTCTL & ~UUART_PROTCTL_STOPB_Msk ) | u32stop_bits;
593
594 return (u32PCLKFreq/u32PDSCnt/u32MinDSCnt/u32MinClkDiv);
595 }
596
597
598 /**
599 * @brief Write USCI_UART data
600 *
601 * @param[in] uuart The pointer of the specified USCI_UART module.
602 * @param[in] pu8TxBuf The buffer to send the data to USCI transmission buffer.
603 * @param[out] u32WriteBytes The byte number of data.
604 *
605 * @return Transfer byte count
606 *
607 * @details The function is to write data into TX buffer to transmit data by USCI_UART.
608 */
UUART_Write(UUART_T * uuart,uint8_t pu8TxBuf[],uint32_t u32WriteBytes)609 uint32_t UUART_Write(UUART_T* uuart, uint8_t pu8TxBuf[], uint32_t u32WriteBytes)
610 {
611 uint32_t u32Count, u32delayno;
612
613 for(u32Count = 0ul; u32Count != u32WriteBytes; u32Count++)
614 {
615 u32delayno = 0ul;
616 while((uuart->BUFSTS & UUART_BUFSTS_TXEMPTY_Msk) == 0ul) /* Wait Tx empty */
617 {
618 u32delayno++;
619 if(u32delayno >= 0x40000000ul)
620 {
621 break;
622 }
623 }
624
625 if(u32delayno >= 0x40000000ul)
626 {
627 break;
628 }
629
630 uuart->TXDAT = (uint8_t)pu8TxBuf[u32Count]; /* Send USCI_UART Data to buffer */
631 }
632
633 return u32Count;
634
635 }
636
637
638 /**
639 * @brief Enable USCI_UART Wake-up Function
640 *
641 * @param[in] uuart The pointer of the specified USCI_UART module.
642 * @param[in] u32WakeupMode The wakeup mode of USCI_UART module.
643 * - \ref UUART_PROTCTL_DATWKEN_Msk : Data wake-up Mode
644 * - \ref UUART_PROTCTL_CTSWKEN_Msk : nCTS wake-up Mode
645 *
646 * @return None
647 *
648 * @details The function is used to enable Wake-up function of USCI_UART.
649 */
UUART_EnableWakeup(UUART_T * uuart,uint32_t u32WakeupMode)650 void UUART_EnableWakeup(UUART_T* uuart, uint32_t u32WakeupMode)
651 {
652 uuart->PROTCTL |= u32WakeupMode;
653 uuart->WKCTL |= UUART_WKCTL_WKEN_Msk;
654 }
655
656
657 /**
658 * @brief Disable USCI_UART Wake-up Function
659 *
660 * @param[in] uuart The pointer of the specified USCI_UART module.
661 *
662 * @return None
663 *
664 * @details The function is used to disable Wake-up function of USCI_UART.
665 */
UUART_DisableWakeup(UUART_T * uuart)666 void UUART_DisableWakeup(UUART_T* uuart)
667 {
668 uuart->PROTCTL &= ~(UUART_PROTCTL_DATWKEN_Msk|UUART_PROTCTL_CTSWKEN_Msk);
669 uuart->WKCTL &= ~UUART_WKCTL_WKEN_Msk;
670 }
671
672 /**
673 * @brief Enable USCI_UART auto flow control
674 *
675 * @param[in] uuart The pointer of the specified USCI_UART module.
676 *
677 * @return None
678 *
679 * @details The function is used to enable USCI_UART auto flow control.
680 */
UUART_EnableFlowCtrl(UUART_T * uuart)681 void UUART_EnableFlowCtrl(UUART_T* uuart)
682 {
683 /* Set RTS signal is low level active */
684 uuart->LINECTL &= ~UUART_LINECTL_CTLOINV_Msk;
685
686 /* Set CTS signal is low level active */
687 uuart->CTLIN0 &= ~UUART_CTLIN0_ININV_Msk;
688
689 /* Enable CTS and RTS auto flow control function */
690 uuart->PROTCTL |= UUART_PROTCTL_RTSAUTOEN_Msk|UUART_PROTCTL_CTSAUTOEN_Msk;
691 }
692
693 /**
694 * @brief Disable USCI_UART auto flow control
695 *
696 * @param[in] uuart The pointer of the specified USCI_UART module.
697 *
698 * @return None
699 *
700 * @details The function is used to disable USCI_UART auto flow control.
701 */
UUART_DisableFlowCtrl(UUART_T * uuart)702 void UUART_DisableFlowCtrl(UUART_T* uuart)
703 {
704 /* Disable CTS and RTS auto flow control function */
705 uuart->PROTCTL &= ~(UUART_PROTCTL_RTSAUTOEN_Msk|UUART_PROTCTL_CTSAUTOEN_Msk);
706 }
707
708
709 /*@}*/ /* end of group USCI_UART_EXPORTED_FUNCTIONS */
710
711 /*@}*/ /* end of group USCI_UART_Driver */
712
713 /*@}*/ /* end of group Standard_Driver */
714
