diff options
Diffstat (limited to 'os/hal/platforms/LPC43xx/serial_lld.c')
| -rw-r--r-- | os/hal/platforms/LPC43xx/serial_lld.c | 476 |
1 files changed, 0 insertions, 476 deletions
diff --git a/os/hal/platforms/LPC43xx/serial_lld.c b/os/hal/platforms/LPC43xx/serial_lld.c deleted file mode 100644 index 96ea7e3f5..000000000 --- a/os/hal/platforms/LPC43xx/serial_lld.c +++ /dev/null @@ -1,476 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-*/
-
-/**
- * @file LPC43xx/serial_lld.c
- * @brief LPC43xx low level serial driver code.
- *
- * @addtogroup SERIAL
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_SERIAL || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-#if LPC_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-/** @brief UART0 serial driver identifier.*/
-SerialDriver SD1;
-#endif
-
-#if LPC_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-/** @brief UART1 serial driver identifier.*/
-SerialDriver SD2;
-#endif
-
-#if LPC_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-/** @brief UART2 serial driver identifier.*/
-SerialDriver SD3;
-#endif
-
-#if LPC_SERIAL_USE_UART3 || defined(__DOXYGEN__)
-/** @brief UART3 serial driver identifier.*/
-SerialDriver SD4;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/** @brief Driver default configuration.*/
-static const SerialConfig default_config = {
- SERIAL_DEFAULT_BITRATE,
- LCR_WL8 | LCR_STOP1 | LCR_NOPARITY,
- FCR_TRIGGER0
-};
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief UART initialization.
- *
- * @param[in] sdp communication channel associated to the UART
- * @param[in] config the architecture-dependent serial driver configuration
- */
-static void uart_init(SerialDriver *sdp, const SerialConfig *config) {
- LPC_USARTn_Type *u = sdp->uart;
- uint32_t div = 0;
-
-#if LPC_SERIAL_USE_UART0
- if (&SD1 == sdp) {
- div = LPC_SERIAL_UART0_PCLK / (config->sc_speed << 4);
- }
-#endif
-
-#if LPC_SERIAL_USE_UART1
- if (&SD2 == sdp) {
- div = LPC_SERIAL_UART1_PCLK / (config->sc_speed << 4);
- }
-#endif
-
-#if LPC_SERIAL_USE_UART2
- if (&SD3 == sdp) {
- div = LPC_SERIAL_UART2_PCLK / (config->sc_speed << 4);
- }
-#endif
-
-#if LPC_SERIAL_USE_UART3
- if (&SD4 == sdp) {
- div = LPC_SERIAL_UART3_PCLK / (config->sc_speed << 4);
- }
-#endif
-
- u->LCR = config->sc_lcr | LCR_DLAB;
- u->DLL = div;
- u->DLM = div >> 8;
- u->LCR = config->sc_lcr;
- u->FCR = FCR_ENABLE | FCR_RXRESET | FCR_TXRESET | config->sc_fcr;
- u->ACR = 0;
- u->FDR = 0x10;
- u->TER = TER_ENABLE;
- u->IER = IER_RBR | IER_STATUS;
-}
-
-/**
- * @brief UART de-initialization.
- *
- * @param[in] u pointer to an UART I/O block
- */
-static void uart_deinit(LPC_USARTn_Type *u) {
-
- u->LCR = LCR_DLAB;
- u->DLL = 1;
- u->DLM = 0;
- u->LCR = 0;
- u->FDR = 0x10;
- u->IER = 0;
- u->FCR = FCR_RXRESET | FCR_TXRESET;
- u->ACR = 0;
- u->TER = TER_ENABLE;
-}
-
-/**
- * @brief Error handling routine.
- *
- * @param[in] sdp communication channel associated to the UART
- * @param[in] err UART LSR register value
- */
-static void set_error(SerialDriver *sdp, IOREG32 err) {
- flagsmask_t sts = 0;
-
- if (err & LSR_OVERRUN)
- sts |= SD_OVERRUN_ERROR;
- if (err & LSR_PARITY)
- sts |= SD_PARITY_ERROR;
- if (err & LSR_FRAMING)
- sts |= SD_FRAMING_ERROR;
- if (err & LSR_BREAK)
- sts |= SD_BREAK_DETECTED;
- chSysLockFromIsr();
- chnAddFlagsI(sdp, sts);
- chSysUnlockFromIsr();
-}
-
-/**
- * @brief Common IRQ handler.
- * @note Tries hard to clear all the pending interrupt sources, we don't
- * want to go through the whole ISR and have another interrupt soon
- * after.
- *
- * @param[in] u pointer to an UART I/O block
- * @param[in] sdp communication channel associated to the UART
- */
-static void serve_interrupt(SerialDriver *sdp) {
- LPC_USARTn_Type *u = sdp->uart;
-
- while (TRUE) {
- switch (u->IIR & IIR_SRC_MASK) {
- case IIR_SRC_NONE:
- return;
- case IIR_SRC_ERROR:
- set_error(sdp, u->LSR);
- break;
- case IIR_SRC_TIMEOUT:
- case IIR_SRC_RX:
- chSysLockFromIsr();
- if (chIQIsEmptyI(&sdp->iqueue))
- chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE);
- chSysUnlockFromIsr();
- while (u->LSR & LSR_RBR_FULL) {
- chSysLockFromIsr();
- if (chIQPutI(&sdp->iqueue, u->RBR) < Q_OK)
- chnAddFlagsI(sdp, SD_OVERRUN_ERROR);
- chSysUnlockFromIsr();
- }
- break;
- case IIR_SRC_TX:
- {
- int i = LPC_SERIAL_FIFO_PRELOAD;
- do {
- msg_t b;
-
- chSysLockFromIsr();
- b = chOQGetI(&sdp->oqueue);
- chSysUnlockFromIsr();
- if (b < Q_OK) {
- u->IER &= ~IER_THRE;
- chSysLockFromIsr();
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- chSysUnlockFromIsr();
- break;
- }
- u->THR = b;
- } while (--i);
- }
- break;
- default:
- (void) u->THR;
- (void) u->RBR;
- }
- }
-}
-
-/**
- * @brief Attempts a TX FIFO preload.
- */
-static void preload(SerialDriver *sdp) {
- LPC_USARTn_Type *u = sdp->uart;
-
- if (u->LSR & LSR_THRE) {
- int i = LPC_SERIAL_FIFO_PRELOAD;
- do {
- msg_t b = chOQGetI(&sdp->oqueue);
- if (b < Q_OK) {
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- return;
- }
- u->THR = b;
- } while (--i);
- }
- u->IER |= IER_THRE;
-}
-
-/**
- * @brief Driver SD1 output notification.
- */
-#if LPC_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-static void notify1(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD1);
-}
-#endif
-
-/**
- * @brief Driver SD2 output notification.
- */
-#if LPC_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-static void notify2(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD2);
-}
-#endif
-
-/**
- * @brief Driver SD3 output notification.
- */
-#if LPC_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-static void notify3(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD3);
-}
-#endif
-
-/**
- * @brief Driver SD4 output notification.
- */
-#if LPC_SERIAL_USE_UART3 || defined(__DOXYGEN__)
-static void notify4(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD4);
-}
-#endif
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/**
- * @brief UART0 IRQ handler.
- *
- * @isr
- */
-#if LPC_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorA0) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(&SD1);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/**
- * @brief UART1 IRQ handler.
- *
- * @isr
- */
-#if LPC_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorA4) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(&SD2);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/**
- * @brief UART2 IRQ handler.
- *
- * @isr
- */
-#if LPC_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorA8) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(&SD3);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/**
- * @brief UART3 IRQ handler.
- *
- * @isr
- */
-#if LPC_SERIAL_USE_UART3 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(VectorAC) {
-
- CH_IRQ_PROLOGUE();
-
- serve_interrupt(&SD4);
-
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level serial driver initialization.
- *
- * @notapi
- */
-void sd_lld_init(void) {
-
-#if LPC_SERIAL_USE_UART0
- sdObjectInit(&SD1, NULL, notify1);
- SD1.uart = ( LPC_USARTn_Type*) LPC_USART0;
-#endif
-
-#if LPC_SERIAL_USE_UART1
- sdObjectInit(&SD2, NULL, notify2);
- SD2.uart = ( LPC_USARTn_Type*) LPC_UART1;
-#endif
-
-#if LPC_SERIAL_USE_UART2
- sdObjectInit(&SD3, NULL, notify3);
- SD3.uart = ( LPC_USARTn_Type*) LPC_USART2;
-#endif
-
-#if LPC_SERIAL_USE_UART3
- sdObjectInit(&SD4, NULL, notify4);
- SD4.uart = ( LPC_USARTn_Type*) LPC_USART3;
-#endif
-}
-
-/**
- * @brief Low level serial driver configuration and (re)start.
- *
- * @param[in] sdp pointer to a @p SerialDriver object
- * @param[in] config the architecture-dependent serial driver configuration.
- * If this parameter is set to @p NULL then a default
- * configuration is used.
- *
- * @notapi
- */
-void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
-
- if (config == NULL)
- config = &default_config;
-
- if (sdp->state == SD_STOP) {
-#if LPC_SERIAL_USE_UART0
- if (&SD1 == sdp) {
- LPC_CCU2->CLK_APB0_USART0_CFG = 1;
- nvicEnableVector(USART0_IRQn,
- CORTEX_PRIORITY_MASK(LPC_SERIAL_UART0_IRQ_PRIORITY));
- }
-#endif
-
-#if LPC_SERIAL_USE_UART1
- if (&SD2 == sdp) {
- LPC_CCU2->CLK_APB0_UART1_CFG = 1;
- nvicEnableVector(UART1_IRQn,
- CORTEX_PRIORITY_MASK(LPC_SERIAL_UART1_IRQ_PRIORITY));
- }
-#endif
-
-#if LPC_SERIAL_USE_UART2
- if (&SD3 == sdp) {
- LPC_CCU2->CLK_APB2_USART2_CFG = 1;
- nvicEnableVector(USART2_IRQn,
- CORTEX_PRIORITY_MASK(LPC_SERIAL_UART2_IRQ_PRIORITY));
- }
-#endif
-
-#if LPC_SERIAL_USE_UART3
- if (&SD4 == sdp) {
- LPC_CCU2->CLK_APB2_USART3_CFG = 1;
- nvicEnableVector(USART3_IRQn,
- CORTEX_PRIORITY_MASK(LPC_SERIAL_UART3_IRQ_PRIORITY));
- }
-#endif
- }
- uart_init(sdp, config);
-}
-
-/**
- * @brief Low level serial driver stop.
- * @details De-initializes the UART, stops the associated clock, resets the
- * interrupt vector.
- *
- * @param[in] sdp pointer to a @p SerialDriver object
- *
- * @notapi
- */
-void sd_lld_stop(SerialDriver *sdp) {
-
- if (sdp->state == SD_READY) {
- uart_deinit(sdp->uart);
-#if LPC_SERIAL_USE_UART0
- if (&SD1 == sdp) {
- LPC_CCU2->CLK_APB0_USART0_CFG = 0;
- nvicDisableVector(USART0_IRQn);
- return;
- }
-#endif
-
-#if LPC_SERIAL_USE_UART1
- if (&SD2 == sdp) {
- LPC_CCU2->CLK_APB0_UART1_CFG = 0;
- nvicDisableVector(UART1_IRQn);
- return;
- }
-#endif
-
-#if LPC_SERIAL_USE_UART2
- if (&SD3 == sdp) {
- LPC_CCU2->CLK_APB2_USART2_CFG = 0;
- nvicDisableVector(USART2_IRQn);
- return;
- }
-#endif
-
-#if LPC_SERIAL_USE_UART3
- if (&SD4 == sdp) {
- LPC_CCU2->CLK_APB2_USART3_CFG = 0;
- nvicDisableVector(USART3_IRQn);
- return;
- }
-#endif
- }
-}
-
-#endif /* HAL_USE_SERIAL */
-
-/** @} */
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