diff options
Diffstat (limited to 'os/hal/platforms/LPC8xx/serial_lld.c')
| -rw-r--r-- | os/hal/platforms/LPC8xx/serial_lld.c | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/os/hal/platforms/LPC8xx/serial_lld.c b/os/hal/platforms/LPC8xx/serial_lld.c deleted file mode 100644 index e9b53dc72..000000000 --- a/os/hal/platforms/LPC8xx/serial_lld.c +++ /dev/null @@ -1,352 +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 LPC8xx/serial_lld.c
- * @brief LPC8xx low level serial driver code.
- *
- * @addtogroup SERIAL
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_SERIAL || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-#if LPC8xx_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-/** @brief UART0 serial driver identifier.*/
-SerialDriver SD1;
-#endif
-
-#if LPC8xx_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-/** @brief UART1 serial driver identifier.*/
-SerialDriver SD2;
-#endif
-
-#if LPC8xx_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-/** @brief UART2 serial driver identifier.*/
-SerialDriver SD3;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables. */
-/*===========================================================================*/
-
-/** @brief Driver default configuration.*/
-static const SerialConfig default_config = {
- SERIAL_DEFAULT_BITRATE,
- (CFG_DL8 | CFG_NOPARITY | CFG_STOP1)
-};
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief Error handling routine.
- *
- * @param[in] sdp communication channel associated to the UART
- * @param[in] err UART STAT register value
- */
-static void set_error(SerialDriver *sdp, IOREG32 err) {
- flagsmask_t sts = 0;
-
- if (err & STAT_OVERRUN)
- sts |= SD_OVERRUN_ERROR;
- if (err & STAT_PARITYERR)
- sts |= SD_PARITY_ERROR;
- if (err & STAT_FRAMERR)
- sts |= SD_FRAMING_ERROR;
- if (err & STAT_RXBRK)
- 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_USART_TypeDef *u = sdp->uart;
-
- while (u->INTSTAT) {
-
- if (u->INTSTAT & STAT_RXRDY) {
- chSysLockFromIsr();
- if (chIQIsEmptyI(&sdp->iqueue))
- chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE);
- if (chIQPutI(&sdp->iqueue, u->RXDATA) < Q_OK)
- chnAddFlagsI(sdp, SD_OVERRUN_ERROR);
- chSysUnlockFromIsr();
- }
-
- if (u->INTSTAT & STAT_TXRDY) {
- msg_t b;
-
- chSysLockFromIsr();
- b = chOQGetI(&sdp->oqueue);
- chSysUnlockFromIsr();
-
- if (b < Q_OK) {
- u->INTENCLR = STAT_TXRDY;
- chSysLockFromIsr();
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- chSysUnlockFromIsr();
- break;
- }
- else {
- u->TXDATA = b;
- }
- }
-
- if (u->INTSTAT & (STAT_OVERRUN | STAT_DELTARXBRK |
- STAT_FRAMERR | STAT_PARITYERR) ) {
- IOREG32 stat = u->STAT;
- set_error(sdp, stat);
- u->STAT = stat;
- }
-
- }
-}
-
-/**
- * @brief Attempts a TX preload.
- */
-static void preload(SerialDriver *sdp) {
- LPC_USART_TypeDef *u = sdp->uart;
-
- if (u->STAT & STAT_TXIDLE) {
- msg_t b = chOQGetI(&sdp->oqueue);
- if (b < Q_OK) {
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- return;
- }
- u->TXDATA = b;
- }
- u->INTENSET = STAT_TXRDY;
-}
-
-/**
- * @brief Driver output notification.
- */
-#if LPC8xx_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-static void notify1(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD1);
-}
-#endif
-
-#if LPC8xx_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-static void notify2(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD2);
-}
-#endif
-
-#if LPC8xx_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-static void notify3(GenericQueue *qp) {
-
- (void)qp;
- preload(&SD3);
-}
-#endif
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/**
- * @brief UARTn IRQ handlers.
- *
- * @isr
- */
-#if LPC8xx_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(Vector4C) {
-
- CH_IRQ_PROLOGUE();
- serve_interrupt( &SD1 );
- CH_IRQ_EPILOGUE();
-}
-#endif
-#if LPC8xx_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(Vector50) {
-
- CH_IRQ_PROLOGUE();
- serve_interrupt( &SD2 );
- CH_IRQ_EPILOGUE();
-}
-#endif
-#if LPC8xx_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-CH_IRQ_HANDLER(Vector54) {
-
- CH_IRQ_PROLOGUE();
- serve_interrupt( &SD3 );
- CH_IRQ_EPILOGUE();
-}
-#endif
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level serial driver initialization.
- *
- * @notapi
- */
-void sd_lld_init(void) {
-
-#if LPC8xx_SERIAL_USE_UART0
- sdObjectInit(&SD1, NULL, notify1);
- SD1.uart = LPC_USART0;
-#endif
-
-#if LPC8xx_SERIAL_USE_UART1
- sdObjectInit(&SD2, NULL, notify2);
- SD2.uart = LPC_USART1;
-#endif
-
-#if LPC8xx_SERIAL_USE_UART2
- sdObjectInit(&SD3, NULL, notify3);
- SD3.uart = LPC_USART2;
-#endif
-
- /* Reset fractional baudrate generator */
- LPC_SYSCON->PRESETCTRL &= ~(1<<2);
- LPC_SYSCON->PRESETCTRL |= (1<<2);
-
- LPC_SYSCON->UARTCLKDIV = LPC8xx_SERIAL_UARTCLKDIV;
- LPC_SYSCON->UARTFRGDIV = LPC8xx_SERIAL_UARTFRGDIV;
- LPC_SYSCON->UARTFRGMULT = LPC8xx_SERIAL_UARTFRGMULT;
-
-}
-
-/**
- * @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 LPC8xx_SERIAL_USE_UART0
- if (&SD1 == sdp) {
- LPC_SYSCON->SYSAHBCLKCTRL |= (1<<14); // Enable Clk
- LPC_SYSCON->PRESETCTRL &= ~(1<<3); // Reset peripheral
- LPC_SYSCON->PRESETCTRL |= (1<<3);
- nvicEnableVector(UART0_IRQn,
- CORTEX_PRIORITY_MASK(LPC8xx_SERIAL_UART0_IRQ_PRIORITY));
- }
-#endif
-
-#if LPC8xx_SERIAL_USE_UART1
- if (&SD2 == sdp) {
- LPC_SYSCON->SYSAHBCLKCTRL |= (1<<15); // Enable Clk
- LPC_SYSCON->PRESETCTRL &= ~(1<<4); // Reset peripheral
- LPC_SYSCON->PRESETCTRL |= (1<<4);
- nvicEnableVector(UART1_IRQn,
- CORTEX_PRIORITY_MASK(LPC8xx_SERIAL_UART1_IRQ_PRIORITY));
- }
-#endif
-
-#if LPC8xx_SERIAL_USE_UART2
- if (&SD3 == sdp) {
- LPC_SYSCON->SYSAHBCLKCTRL |= (1<<16); // Enable Clk
- LPC_SYSCON->PRESETCTRL &= ~(1<<5); // Reset peripheral
- LPC_SYSCON->PRESETCTRL |= (1<<5);
- nvicEnableVector(UART2_IRQn,
- CORTEX_PRIORITY_MASK(LPC8xx_SERIAL_UART2_IRQ_PRIORITY));
- }
-#endif
-
- }
-
- sdp->uart->BRG = (LPC8xx_SERIAL_U_PCLK / (config->sc_speed << 4)) -1;
- sdp->uart->INTENSET = STAT_FRAMERR | STAT_OVERRUN |
- STAT_PARITYERR | STAT_DELTARXBRK |
- STAT_RXRDY;
- sdp->uart->CFG = config->sc_cfg | CFG_ENA;
-}
-
-/**
- * @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) {
- sdp->uart->INTENCLR = STAT_TXRDY | STAT_RXRDY;
- sdp->uart->CFG = 0;
-
-#if LPC8xx_SERIAL_USE_UART0
- if (&SD1 == sdp) {
- LPC_SYSCON->SYSAHBCLKCTRL &= ~(1<<12);
- nvicDisableVector(UART0_IRQn);
- return;
- }
-#endif
-
-#if LPC8xx_SERIAL_USE_UART1
- if (&SD2 == sdp) {
- LPC_SYSCON->SYSAHBCLKCTRL &= ~(1<<13);
- nvicDisableVector(UART1_IRQn);
- return;
- }
-#endif
-
-#if LPC8xx_SERIAL_USE_UART2
- if (&SD3 == sdp) {
- LPC_SYSCON->SYSAHBCLKCTRL &= ~(1<<14);
- nvicDisableVector(UART2_IRQn);
- return;
- }
-#endif
-
- }
-}
-
-#endif /* HAL_USE_SERIAL */
-
-/** @} */
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