diff options
Diffstat (limited to 'os/hal/ports/KINETIS/K20x/serial_lld.c')
| -rw-r--r-- | os/hal/ports/KINETIS/K20x/serial_lld.c | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/os/hal/ports/KINETIS/K20x/serial_lld.c b/os/hal/ports/KINETIS/K20x/serial_lld.c deleted file mode 100644 index 0092747..0000000 --- a/os/hal/ports/KINETIS/K20x/serial_lld.c +++ /dev/null @@ -1,327 +0,0 @@ -/*
- ChibiOS - Copyright (C) 2014-2015 Fabio Utzig
-
- 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 K20x/serial_lld.c
- * @brief Kinetis K20x Serial Driver subsystem low level driver source.
- *
- * @addtogroup SERIAL
- * @{
- */
-
-#include "osal.h"
-#include "hal.h"
-
-#if HAL_USE_SERIAL || defined(__DOXYGEN__)
-
-#include "mk20d5.h"
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/**
- * @brief SD1 driver identifier.
- */
-#if KINETIS_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-SerialDriver SD1;
-#endif
-
-#if KINETIS_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-SerialDriver SD2;
-#endif
-
-#if KINETIS_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-SerialDriver SD3;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/**
- * @brief Driver default configuration.
- */
-static const SerialConfig default_config = {
- 38400
-};
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @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) {
- UART_TypeDef *u = sdp->uart;
- uint8_t s1 = u->S1;
-
- if (s1 & UARTx_S1_RDRF) {
- osalSysLockFromISR();
- if (iqIsEmptyI(&sdp->iqueue))
- chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE);
- if (iqPutI(&sdp->iqueue, u->D) < Q_OK)
- chnAddFlagsI(sdp, SD_OVERRUN_ERROR);
- osalSysUnlockFromISR();
- }
-
- if (s1 & UARTx_S1_TDRE) {
- msg_t b;
-
- osalSysLockFromISR();
- b = oqGetI(&sdp->oqueue);
- osalSysUnlockFromISR();
-
- if (b < Q_OK) {
- osalSysLockFromISR();
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- osalSysUnlockFromISR();
- u->C2 &= ~UARTx_C2_TIE;
- } else {
- u->D = b;
- }
- }
-}
-
-/**
- * @brief Attempts a TX preload
- */
-static void preload(SerialDriver *sdp) {
- UART_TypeDef *u = sdp->uart;
-
- if (u->S1 & UARTx_S1_TDRE) {
- msg_t b = oqGetI(&sdp->oqueue);
- if (b < Q_OK) {
- chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY);
- return;
- }
- u->D = b;
- u->C2 |= UARTx_C2_TIE;
- }
-}
-
-/**
- * @brief Driver output notification.
- */
-#if KINETIS_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-static void notify1(io_queue_t *qp)
-{
- (void)qp;
- preload(&SD1);
-}
-#endif
-
-#if KINETIS_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-static void notify2(io_queue_t *qp)
-{
- (void)qp;
- preload(&SD2);
-}
-#endif
-
-#if KINETIS_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-static void notify3(io_queue_t *qp)
-{
- (void)qp;
- preload(&SD3);
-}
-#endif
-
-/**
- * @brief Common UART configuration.
- *
- */
-static void configure_uart(UART_TypeDef *uart, const SerialConfig *config)
-{
- uint32_t divisor = (KINETIS_SYSCLK_FREQUENCY * 2 + 1) / config->sc_speed;
-
- /* Disable UART while configuring */
- uart->C2 &= ~(UARTx_C2_RE | UARTx_C2_TE);
- uart->C1 = 0;
-
- uart->BDH = UARTx_BDH_SBR(divisor >> 13) | (uart->BDH & ~UARTx_BDH_SBR_MASK);
- uart->BDL = divisor >> 5;
- uart->C4 = UARTx_C4_BRFA(divisor) | (uart->C4 & ~UARTx_C4_BRFA_MASK);
-
- uart->C2 |= UARTx_C2_RE | UARTx_C2_RIE | UARTx_C2_TE;
- uart->C3 = UARTx_C3_ORIE | UARTx_C3_NEIE | UARTx_C3_FEIE | UARTx_C3_PEIE;
-}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/* TODO:
- * UART0_Error is Vector84
- * UART1_Error is Vector8C
- * UART2_Error is Vector94
- */
-
-#if KINETIS_SERIAL_USE_UART0 || defined(__DOXYGEN__)
-OSAL_IRQ_HANDLER(Vector80) {
-
- OSAL_IRQ_PROLOGUE();
- serve_interrupt(&SD1);
- OSAL_IRQ_EPILOGUE();
-}
-#endif
-
-#if KINETIS_SERIAL_USE_UART1 || defined(__DOXYGEN__)
-OSAL_IRQ_HANDLER(Vector88) {
-
- OSAL_IRQ_PROLOGUE();
- serve_interrupt(&SD2);
- OSAL_IRQ_EPILOGUE();
-}
-#endif
-
-#if KINETIS_SERIAL_USE_UART2 || defined(__DOXYGEN__)
-OSAL_IRQ_HANDLER(Vector90) {
-
- OSAL_IRQ_PROLOGUE();
- serve_interrupt(&SD3);
- OSAL_IRQ_EPILOGUE();
-}
-#endif
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level serial driver initialization.
- *
- * @notapi
- */
-void sd_lld_init(void) {
-
-#if KINETIS_SERIAL_USE_UART0
- /* Driver initialization.*/
- sdObjectInit(&SD1, NULL, notify1);
- SD1.uart = UART0;
-#endif
-
-#if KINETIS_SERIAL_USE_UART1
- /* Driver initialization.*/
- sdObjectInit(&SD2, NULL, notify2);
- SD2.uart = UART1;
-#endif
-
-#if KINETIS_SERIAL_USE_UART2
- /* Driver initialization.*/
- sdObjectInit(&SD3, NULL, notify3);
- SD3.uart = UART2;
-#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) {
- /* Enables the peripheral.*/
-
-#if KINETIS_SERIAL_USE_UART0
- if (sdp == &SD1) {
- SIM->SCGC4 |= SIM_SCGC4_UART0;
- configure_uart(sdp->uart, config);
- nvicEnableVector(UART0Status_IRQn, KINETIS_SERIAL_UART0_PRIORITY);
- }
-#endif /* KINETIS_SERIAL_USE_UART0 */
-
-#if KINETIS_SERIAL_USE_UART1
- if (sdp == &SD2) {
- SIM->SCGC4 |= SIM_SCGC4_UART1;
- configure_uart(sdp->uart, config);
- nvicEnableVector(UART1Status_IRQn, KINETIS_SERIAL_UART1_PRIORITY);
- }
-#endif /* KINETIS_SERIAL_USE_UART1 */
-
-#if KINETIS_SERIAL_USE_UART2
- if (sdp == &SD3) {
- SIM->SCGC4 |= SIM_SCGC4_UART2;
- configure_uart(sdp->uart, config);
- nvicEnableVector(UART2Status_IRQn, KINETIS_SERIAL_UART2_PRIORITY);
- }
-#endif /* KINETIS_SERIAL_USE_UART2 */
-
- }
- /* Configures the peripheral.*/
-
-}
-
-/**
- * @brief Low level serial driver stop.
- * @details De-initializes the USART, 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) {
- /* TODO: Resets the peripheral.*/
-
-#if KINETIS_SERIAL_USE_UART0
- if (sdp == &SD1) {
- nvicDisableVector(UART0Status_IRQn);
- SIM->SCGC4 &= ~SIM_SCGC4_UART0;
- }
-#endif
-
-#if KINETIS_SERIAL_USE_UART1
- if (sdp == &SD2) {
- nvicDisableVector(UART1Status_IRQn);
- SIM->SCGC4 &= ~SIM_SCGC4_UART1;
- }
-#endif
-
-#if KINETIS_SERIAL_USE_UART2
- if (sdp == &SD3) {
- nvicDisableVector(UART2Status_IRQn);
- SIM->SCGC4 &= ~SIM_SCGC4_UART2;
- }
-#endif
- }
-}
-
-#endif /* HAL_USE_SERIAL */
-
-/** @} */
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