Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 | /*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* Copyright 2016-2017 NXP
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_lpuart_edma.h"
/*******************************************************************************
* Definitions
******************************************************************************/
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.lpuart_edma"
#endif
/*<! Structure definition for lpuart_edma_private_handle_t. The structure is private. */
typedef struct _lpuart_edma_private_handle
{
LPUART_Type *base;
lpuart_edma_handle_t *handle;
} lpuart_edma_private_handle_t;
/* LPUART EDMA transfer handle. */
enum _lpuart_edma_tansfer_states
{
kLPUART_TxIdle, /* TX idle. */
kLPUART_TxBusy, /* TX busy. */
kLPUART_RxIdle, /* RX idle. */
kLPUART_RxBusy /* RX busy. */
};
/*******************************************************************************
* Variables
******************************************************************************/
/* Array of LPUART handle. */
#if (defined(LPUART8))
#define LPUART_HANDLE_ARRAY_SIZE 9
#else /* LPUART8 */
#if (defined(LPUART7))
#define LPUART_HANDLE_ARRAY_SIZE 8
#else /* LPUART7 */
#if (defined(LPUART6))
#define LPUART_HANDLE_ARRAY_SIZE 7
#else /* LPUART6 */
#if (defined(LPUART5))
#define LPUART_HANDLE_ARRAY_SIZE 6
#else /* LPUART5 */
#if (defined(LPUART4))
#define LPUART_HANDLE_ARRAY_SIZE 5
#else /* LPUART4 */
#if (defined(LPUART3))
#define LPUART_HANDLE_ARRAY_SIZE 4
#else /* LPUART3 */
#if (defined(LPUART2))
#define LPUART_HANDLE_ARRAY_SIZE 3
#else /* LPUART2 */
#if (defined(LPUART1))
#define LPUART_HANDLE_ARRAY_SIZE 2
#else /* LPUART1 */
#if (defined(LPUART0))
#define LPUART_HANDLE_ARRAY_SIZE 1
#else /* LPUART0 */
#define LPUART_HANDLE_ARRAY_SIZE FSL_FEATURE_SOC_LPUART_COUNT
#endif /* LPUART 0 */
#endif /* LPUART 1 */
#endif /* LPUART 2 */
#endif /* LPUART 3 */
#endif /* LPUART 4 */
#endif /* LPUART 5 */
#endif /* LPUART 6 */
#endif /* LPUART 7 */
#endif /* LPUART 8 */
/*<! Private handle only used for internally. */
static lpuart_edma_private_handle_t s_edmaPrivateHandle[LPUART_HANDLE_ARRAY_SIZE];
/*******************************************************************************
* Prototypes
******************************************************************************/
/*!
* @brief LPUART EDMA send finished callback function.
*
* This function is called when LPUART EDMA send finished. It disables the LPUART
* TX EDMA request and sends @ref kStatus_LPUART_TxIdle to LPUART callback.
*
* @param handle The EDMA handle.
* @param param Callback function parameter.
*/
static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
/*!
* @brief LPUART EDMA receive finished callback function.
*
* This function is called when LPUART EDMA receive finished. It disables the LPUART
* RX EDMA request and sends @ref kStatus_LPUART_RxIdle to LPUART callback.
*
* @param handle The EDMA handle.
* @param param Callback function parameter.
*/
static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds);
/*******************************************************************************
* Code
******************************************************************************/
static void LPUART_SendEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
{
assert(param);
lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param;
/* Avoid the warning for unused variables. */
handle = handle;
tcds = tcds;
if (transferDone)
{
LPUART_TransferAbortSendEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle);
if (lpuartPrivateHandle->handle->callback)
{
lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle,
kStatus_LPUART_TxIdle, lpuartPrivateHandle->handle->userData);
}
}
}
static void LPUART_ReceiveEDMACallback(edma_handle_t *handle, void *param, bool transferDone, uint32_t tcds)
{
assert(param);
lpuart_edma_private_handle_t *lpuartPrivateHandle = (lpuart_edma_private_handle_t *)param;
/* Avoid warning for unused parameters. */
handle = handle;
tcds = tcds;
if (transferDone)
{
/* Disable transfer. */
LPUART_TransferAbortReceiveEDMA(lpuartPrivateHandle->base, lpuartPrivateHandle->handle);
if (lpuartPrivateHandle->handle->callback)
{
lpuartPrivateHandle->handle->callback(lpuartPrivateHandle->base, lpuartPrivateHandle->handle,
kStatus_LPUART_RxIdle, lpuartPrivateHandle->handle->userData);
}
}
}
/*!
* brief Initializes the LPUART handle which is used in transactional functions.
* param base LPUART peripheral base address.
* param handle Pointer to lpuart_edma_handle_t structure.
* param callback Callback function.
* param userData User data.
* param txEdmaHandle User requested DMA handle for TX DMA transfer.
* param rxEdmaHandle User requested DMA handle for RX DMA transfer.
*/
void LPUART_TransferCreateHandleEDMA(LPUART_Type *base,
lpuart_edma_handle_t *handle,
lpuart_edma_transfer_callback_t callback,
void *userData,
edma_handle_t *txEdmaHandle,
edma_handle_t *rxEdmaHandle)
{
assert(handle);
uint32_t instance = LPUART_GetInstance(base);
s_edmaPrivateHandle[instance].base = base;
s_edmaPrivateHandle[instance].handle = handle;
memset(handle, 0, sizeof(*handle));
handle->rxState = kLPUART_RxIdle;
handle->txState = kLPUART_TxIdle;
handle->rxEdmaHandle = rxEdmaHandle;
handle->txEdmaHandle = txEdmaHandle;
handle->callback = callback;
handle->userData = userData;
#if defined(FSL_FEATURE_LPUART_HAS_FIFO) && FSL_FEATURE_LPUART_HAS_FIFO
/* Note:
Take care of the RX FIFO, EDMA request only assert when received bytes
equal or more than RX water mark, there is potential issue if RX water
mark larger than 1.
For example, if RX FIFO water mark is 2, upper layer needs 5 bytes and
5 bytes are received. the last byte will be saved in FIFO but not trigger
EDMA transfer because the water mark is 2.
*/
if (rxEdmaHandle)
{
base->WATER &= (~LPUART_WATER_RXWATER_MASK);
}
#endif
/* Configure TX. */
if (txEdmaHandle)
{
EDMA_SetCallback(handle->txEdmaHandle, LPUART_SendEDMACallback, &s_edmaPrivateHandle[instance]);
}
/* Configure RX. */
if (rxEdmaHandle)
{
EDMA_SetCallback(handle->rxEdmaHandle, LPUART_ReceiveEDMACallback, &s_edmaPrivateHandle[instance]);
}
}
/*!
* brief Sends data using eDMA.
*
* This function sends data using eDMA. This is a non-blocking function, which returns
* right away. When all data is sent, the send callback function is called.
*
* param base LPUART peripheral base address.
* param handle LPUART handle pointer.
* param xfer LPUART eDMA transfer structure. See #lpuart_transfer_t.
* retval kStatus_Success if succeed, others failed.
* retval kStatus_LPUART_TxBusy Previous transfer on going.
* retval kStatus_InvalidArgument Invalid argument.
*/
status_t LPUART_SendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer)
{
assert(handle);
assert(handle->txEdmaHandle);
assert(xfer);
assert(xfer->data);
assert(xfer->dataSize);
edma_transfer_config_t xferConfig;
status_t status;
/* If previous TX not finished. */
if (kLPUART_TxBusy == handle->txState)
{
status = kStatus_LPUART_TxBusy;
}
else
{
handle->txState = kLPUART_TxBusy;
handle->txDataSizeAll = xfer->dataSize;
/* Prepare transfer. */
EDMA_PrepareTransfer(&xferConfig, xfer->data, sizeof(uint8_t), (void *)LPUART_GetDataRegisterAddress(base),
sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_MemoryToPeripheral);
/* Store the initially configured eDMA minor byte transfer count into the LPUART handle */
handle->nbytes = sizeof(uint8_t);
/* Submit transfer. */
EDMA_SubmitTransfer(handle->txEdmaHandle, &xferConfig);
EDMA_StartTransfer(handle->txEdmaHandle);
/* Enable LPUART TX EDMA. */
LPUART_EnableTxDMA(base, true);
status = kStatus_Success;
}
return status;
}
/*!
* brief Receives data using eDMA.
*
* This function receives data using eDMA. This is non-blocking function, which returns
* right away. When all data is received, the receive callback function is called.
*
* param base LPUART peripheral base address.
* param handle Pointer to lpuart_edma_handle_t structure.
* param xfer LPUART eDMA transfer structure, see #lpuart_transfer_t.
* retval kStatus_Success if succeed, others fail.
* retval kStatus_LPUART_RxBusy Previous transfer ongoing.
* retval kStatus_InvalidArgument Invalid argument.
*/
status_t LPUART_ReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, lpuart_transfer_t *xfer)
{
assert(handle);
assert(handle->rxEdmaHandle);
assert(xfer);
assert(xfer->data);
assert(xfer->dataSize);
edma_transfer_config_t xferConfig;
status_t status;
/* If previous RX not finished. */
if (kLPUART_RxBusy == handle->rxState)
{
status = kStatus_LPUART_RxBusy;
}
else
{
handle->rxState = kLPUART_RxBusy;
handle->rxDataSizeAll = xfer->dataSize;
/* Prepare transfer. */
EDMA_PrepareTransfer(&xferConfig, (void *)LPUART_GetDataRegisterAddress(base), sizeof(uint8_t), xfer->data,
sizeof(uint8_t), sizeof(uint8_t), xfer->dataSize, kEDMA_PeripheralToMemory);
/* Store the initially configured eDMA minor byte transfer count into the LPUART handle */
handle->nbytes = sizeof(uint8_t);
/* Submit transfer. */
EDMA_SubmitTransfer(handle->rxEdmaHandle, &xferConfig);
EDMA_StartTransfer(handle->rxEdmaHandle);
/* Enable LPUART RX EDMA. */
LPUART_EnableRxDMA(base, true);
status = kStatus_Success;
}
return status;
}
/*!
* brief Aborts the sent data using eDMA.
*
* This function aborts the sent data using eDMA.
*
* param base LPUART peripheral base address.
* param handle Pointer to lpuart_edma_handle_t structure.
*/
void LPUART_TransferAbortSendEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle)
{
assert(handle);
assert(handle->txEdmaHandle);
/* Disable LPUART TX EDMA. */
LPUART_EnableTxDMA(base, false);
/* Stop transfer. */
EDMA_AbortTransfer(handle->txEdmaHandle);
handle->txState = kLPUART_TxIdle;
}
/*!
* brief Aborts the received data using eDMA.
*
* This function aborts the received data using eDMA.
*
* param base LPUART peripheral base address.
* param handle Pointer to lpuart_edma_handle_t structure.
*/
void LPUART_TransferAbortReceiveEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle)
{
assert(handle);
assert(handle->rxEdmaHandle);
/* Disable LPUART RX EDMA. */
LPUART_EnableRxDMA(base, false);
/* Stop transfer. */
EDMA_AbortTransfer(handle->rxEdmaHandle);
handle->rxState = kLPUART_RxIdle;
}
/*!
* brief Gets the number of received bytes.
*
* This function gets the number of received bytes.
*
* param base LPUART peripheral base address.
* param handle LPUART handle pointer.
* param count Receive bytes count.
* retval kStatus_NoTransferInProgress No receive in progress.
* retval kStatus_InvalidArgument Parameter is invalid.
* retval kStatus_Success Get successfully through the parameter \p count;
*/
status_t LPUART_TransferGetReceiveCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count)
{
assert(handle);
assert(handle->rxEdmaHandle);
assert(count);
if (kLPUART_RxIdle == handle->rxState)
{
return kStatus_NoTransferInProgress;
}
*count = handle->rxDataSizeAll -
(uint32_t)handle->nbytes *
EDMA_GetRemainingMajorLoopCount(handle->rxEdmaHandle->base, handle->rxEdmaHandle->channel);
return kStatus_Success;
}
/*!
* brief Gets the number of bytes written to the LPUART TX register.
*
* This function gets the number of bytes written to the LPUART TX
* register by DMA.
*
* param base LPUART peripheral base address.
* param handle LPUART handle pointer.
* param count Send bytes count.
* retval kStatus_NoTransferInProgress No send in progress.
* retval kStatus_InvalidArgument Parameter is invalid.
* retval kStatus_Success Get successfully through the parameter \p count;
*/
status_t LPUART_TransferGetSendCountEDMA(LPUART_Type *base, lpuart_edma_handle_t *handle, uint32_t *count)
{
assert(handle);
assert(handle->txEdmaHandle);
assert(count);
if (kLPUART_TxIdle == handle->txState)
{
return kStatus_NoTransferInProgress;
}
*count = handle->txDataSizeAll -
(uint32_t)handle->nbytes *
EDMA_GetRemainingMajorLoopCount(handle->txEdmaHandle->base, handle->txEdmaHandle->channel);
return kStatus_Success;
}
|