diff options
Diffstat (limited to 'os/hal/ports/TIVA/LLD/UART/hal_serial_lld.c')
| -rw-r--r-- | os/hal/ports/TIVA/LLD/UART/hal_serial_lld.c | 664 |
1 files changed, 664 insertions, 0 deletions
diff --git a/os/hal/ports/TIVA/LLD/UART/hal_serial_lld.c b/os/hal/ports/TIVA/LLD/UART/hal_serial_lld.c new file mode 100644 index 0000000..89d29da --- /dev/null +++ b/os/hal/ports/TIVA/LLD/UART/hal_serial_lld.c @@ -0,0 +1,664 @@ +/* + Copyright (C) 2014..2016 Marco Veeneman + + 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 TIVA/LLD/serial_lld.c + * @brief Tiva low level serial driver code. + * + * @addtogroup SERIAL + * @{ + */ + +#include "hal.h" + +#if HAL_USE_SERIAL || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver local definitions. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* Driver exported variables. */ +/*===========================================================================*/ + +/** + * @brief UART0 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART0 || defined(__DOXYGEN__) +SerialDriver SD1; +#endif + +/** + * @brief UART1 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART1 || defined(__DOXYGEN__) +SerialDriver SD2; +#endif + +/** + * @brief UART2 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART2 || defined(__DOXYGEN__) +SerialDriver SD3; +#endif + +/** + * @brief UART3 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART3 || defined(__DOXYGEN__) +SerialDriver SD4; +#endif + +/** + * @brief UART4 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART4 || defined(__DOXYGEN__) +SerialDriver SD5; +#endif + +/** + * @brief UART5 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART5 || defined(__DOXYGEN__) +SerialDriver SD6; +#endif + +/** + * @brief UART6 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART6 || defined(__DOXYGEN__) +SerialDriver SD7; +#endif + +/** + * @brief UART7 serial driver identifier. + */ +#if TIVA_SERIAL_USE_UART7 || defined(__DOXYGEN__) +SerialDriver SD8; +#endif + +/*===========================================================================*/ +/* Driver local variables. */ +/*===========================================================================*/ + +/** + * @brief Driver default configuration. + */ +static const SerialConfig sd_default_config = +{ + SERIAL_DEFAULT_BITRATE, + TIVA_LCRH_FEN | TIVA_LCRH_WLEN_8, + TIVA_IFLS_TXIFLSEL_1_8_F | TIVA_IFLS_RXIFLSEL_1_8_E +}; + +/*===========================================================================*/ +/* 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) +{ + UART_TypeDef *u = sdp->uart; + uint32_t div; /* baud rate divisor */ + + /* disable the UART before any of the control registers are reprogrammed */ + u->CTL &= ~TIVA_CTL_UARTEN; + div = (((TIVA_SYSCLK * 8) / config->sc_speed) + 1) / 2; + u->IBRD = div / 64; /* integer portion of the baud rate divisor */ + u->FBRD = div % 64; /* fractional portion of the baud rate divisor */ + u->LCRH = config->sc_lcrh; /* set data format */ + u->IFLS = config->sc_ifls; + u->CTL |= TIVA_CTL_TXE | TIVA_CTL_RXE | TIVA_CTL_UARTEN; + u->IM |= TIVA_IM_RXIM | TIVA_IM_TXIM | TIVA_IM_RTIM; /* interrupts enable */ +} + +/** + * @brief UART de-initialization. + * + * @param[in] u pointer to an UART I/O block + */ +static void uart_deinit(UART_TypeDef *u) +{ + u->CTL &= ~TIVA_CTL_UARTEN; +} + +/** + * @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, uint16_t err) +{ + eventflags_t sts = 0; + + if (err & TIVA_MIS_FEMIS) + sts |= SD_FRAMING_ERROR; + if (err & TIVA_MIS_PEMIS) + sts |= SD_PARITY_ERROR; + if (err & TIVA_MIS_BEMIS) + sts |= SD_BREAK_DETECTED; + if (err & TIVA_MIS_OEMIS) + sts |= SD_OVERRUN_ERROR; + osalSysLockFromISR(); + chnAddFlagsI(sdp, sts); + osalSysUnlockFromISR(); +} + +/** + * @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 serial_serve_interrupt(SerialDriver *sdp) +{ + UART_TypeDef *u = sdp->uart; + uint16_t mis = u->MIS; + + u->ICR = mis; /* clear interrupts */ + + if (mis & (TIVA_MIS_FEMIS | TIVA_MIS_PEMIS | TIVA_MIS_BEMIS | TIVA_MIS_OEMIS)) { + set_error(sdp, mis); + } + + if ((mis & TIVA_MIS_RXMIS) || (mis & TIVA_MIS_RTMIS)) { + osalSysLockFromISR(); + if (iqIsEmptyI(&sdp->iqueue)) { + chnAddFlagsI(sdp, CHN_INPUT_AVAILABLE); + } + osalSysUnlockFromISR(); + while ((u->FR & TIVA_FR_RXFE) == 0) { + osalSysLockFromISR(); + if (iqPutI(&sdp->iqueue, u->DR) < Q_OK) { + chnAddFlagsI(sdp, SD_OVERRUN_ERROR); + } + osalSysUnlockFromISR(); + } + } + + if (mis & TIVA_MIS_TXMIS) { + while ((u->FR & TIVA_FR_TXFF) == 0) { + msg_t b; + osalSysLockFromISR(); + b = oqGetI(&sdp->oqueue); + osalSysUnlockFromISR(); + if (b < Q_OK) { + u->IM &= ~TIVA_IM_TXIM; + osalSysLockFromISR(); + chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY); + osalSysUnlockFromISR(); + break; + } + u->DR = b; + } + } +} + +/** + * @brief + */ +static void fifo_load(SerialDriver *sdp) +{ + UART_TypeDef *u = sdp->uart; + + while ((u->FR & TIVA_FR_TXFF) == 0) { + msg_t b = oqGetI(&sdp->oqueue); + if (b < Q_OK) { + chnAddFlagsI(sdp, CHN_OUTPUT_EMPTY); + return; + } + u->DR = b; + } + u->IM |= TIVA_IM_TXIM; /* transmit interrupt enable */ +} + +/** + * @brief Driver SD1 output notification. + */ +#if TIVA_SERIAL_USE_UART0 || defined(__DOXYGEN__) +static void notify1(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD1); +} +#endif + +/** + * @brief Driver SD2 output notification. + */ +#if TIVA_SERIAL_USE_UART1 || defined(__DOXYGEN__) +static void notify2(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD2); +} +#endif + +/** + * @brief Driver SD3 output notification. + */ +#if TIVA_SERIAL_USE_UART2 || defined(__DOXYGEN__) +static void notify3(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD3); +} +#endif + +/** + * @brief Driver SD4 output notification. + */ +#if TIVA_SERIAL_USE_UART3 || defined(__DOXYGEN__) +static void notify4(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD4); +} +#endif + +/** + * @brief Driver SD5 output notification. + */ +#if TIVA_SERIAL_USE_UART4 || defined(__DOXYGEN__) +static void notify5(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD5); +} +#endif + +/** + * @brief Driver SD6 output notification. + */ +#if TIVA_SERIAL_USE_UART5 || defined(__DOXYGEN__) +static void notify6(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD6); +} +#endif + +/** + * @brief Driver SD7 output notification. + */ +#if TIVA_SERIAL_USE_UART6 || defined(__DOXYGEN__) +static void notify7(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD7); +} +#endif + +/** + * @brief Driver SD8 output notification. + */ +#if TIVA_SERIAL_USE_UART7 || defined(__DOXYGEN__) +static void notify8(io_queue_t *qp) +{ + (void)qp; + fifo_load(&SD8); +} +#endif + +/*===========================================================================*/ +/* Driver interrupt handlers. */ +/*===========================================================================*/ + +/** + * @brief UART0 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART0 || defined(__DOXYGEN__) +#if !defined(TIVA_UART0_HANDLER) +#error "TIVA_UART0_HANDLER not defined" +#endif +CH_IRQ_HANDLER(TIVA_UART0_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD1); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART1 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART1 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART1_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD2); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART2 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART2 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART2_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD3); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART3 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART3 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART3_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD4); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART4 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART4 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART4_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD5); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART5 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART5 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART5_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD6); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART6 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART6 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART6_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD7); + + CH_IRQ_EPILOGUE(); +} +#endif + +/** + * @brief UART7 IRQ handler. + */ +#if TIVA_SERIAL_USE_UART7 || defined(__DOXYGEN__) +CH_IRQ_HANDLER(TIVA_UART7_HANDLER) +{ + CH_IRQ_PROLOGUE(); + + serial_serve_interrupt(&SD8); + + CH_IRQ_EPILOGUE(); +} +#endif + +/*===========================================================================*/ +/* Driver exported functions. */ +/*===========================================================================*/ + +/** + * @brief Low level serial driver initialization. + */ +void sd_lld_init(void) +{ +#if TIVA_SERIAL_USE_UART0 + sdObjectInit(&SD1, NULL, notify1); + SD1.uart = UART0; +#endif + +#if TIVA_SERIAL_USE_UART1 + sdObjectInit(&SD2, NULL, notify2); + SD2.uart = UART1; +#endif + +#if TIVA_SERIAL_USE_UART2 + sdObjectInit(&SD3, NULL, notify3); + SD3.uart = UART2; +#endif + +#if TIVA_SERIAL_USE_UART3 + sdObjectInit(&SD4, NULL, notify4); + SD4.uart = UART3; +#endif + +#if TIVA_SERIAL_USE_UART4 + sdObjectInit(&SD5, NULL, notify5); + SD5.uart = UART4; +#endif + +#if TIVA_SERIAL_USE_UART5 + sdObjectInit(&SD6, NULL, notify6); + SD6.uart = UART5; +#endif + +#if TIVA_SERIAL_USE_UART6 + sdObjectInit(&SD7, NULL, notify7); + SD7.uart = UART6; +#endif + +#if TIVA_SERIAL_USE_UART7 + sdObjectInit(&SD8, NULL, notify8); + SD8.uart = UART7; +#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. + */ +void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) +{ + if (config == NULL) + config = &sd_default_config; + + if (sdp->state == SD_STOP) { +#if TIVA_SERIAL_USE_UART0 + if (&SD1 == sdp) { + SYSCTL->RCGCUART |= (1 << 0); + + while (!(SYSCTL->PRUART & (1 << 0))) + ; + + nvicEnableVector(TIVA_UART0_NUMBER, TIVA_SERIAL_UART0_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART1 + if (&SD2 == sdp) { + SYSCTL->RCGCUART |= (1 << 1); + + while (!(SYSCTL->PRUART & (1 << 1))) + ; + + nvicEnableVector(TIVA_UART1_NUMBER, TIVA_SERIAL_UART1_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART2 + if (&SD3 == sdp) { + SYSCTL->RCGCUART |= (1 << 2); + + while (!(SYSCTL->PRUART & (1 << 2))) + ; + + nvicEnableVector(TIVA_UART2_NUMBER, TIVA_SERIAL_UART2_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART3 + if (&SD4 == sdp) { + SYSCTL->RCGCUART |= (1 << 3); + + while (!(SYSCTL->PRUART & (1 << 3))) + ; + + nvicEnableVector(TIVA_UART3_NUMBER, TIVA_SERIAL_UART3_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART4 + if (&SD5 == sdp) { + SYSCTL->RCGCUART |= (1 << 4); + + while (!(SYSCTL->PRUART & (1 << 4))) + ; + + nvicEnableVector(TIVA_UART4_NUMBER, TIVA_SERIAL_UART4_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART5 + if (&SD6 == sdp) { + SYSCTL->RCGCUART |= (1 << 5); + + while (!(SYSCTL->PRUART & (1 << 5))) + ; + + nvicEnableVector(TIVA_UART5_NUMBER, TIVA_SERIAL_UART5_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART6 + if (&SD7 == sdp) { + SYSCTL->RCGCUART |= (1 << 6); + + while (!(SYSCTL->PRUART & (1 << 6))) + ; + + nvicEnableVector(TIVA_UART6_NUMBER, TIVA_SERIAL_UART6_PRIORITY); + } +#endif +#if TIVA_SERIAL_USE_UART7 + if (&SD8 == sdp) { + SYSCTL->RCGCUART |= (1 << 7); + + while (!(SYSCTL->PRUART & (1 << 7))) + ; + + nvicEnableVector(TIVA_UART7_NUMBER, TIVA_SERIAL_UART7_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 + */ +void sd_lld_stop(SerialDriver *sdp) +{ + if (sdp->state == SD_READY) { + uart_deinit(sdp->uart); +#if TIVA_SERIAL_USE_UART0 + if (&SD1 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 0); /* disable UART0 module */ + nvicDisableVector(TIVA_UART0_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART1 + if (&SD2 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 1); /* disable UART1 module */ + nvicDisableVector(TIVA_UART1_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART2 + if (&SD3 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 2); /* disable UART2 module */ + nvicDisableVector(TIVA_UART2_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART3 + if (&SD4 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 3); /* disable UART3 module */ + nvicDisableVector(TIVA_UART3_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART4 + if (&SD5 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 4); /* disable UART4 module */ + nvicDisableVector(TIVA_UART4_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART5 + if (&SD6 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 5); /* disable UART5 module */ + nvicDisableVector(TIVA_UART5_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART6 + if (&SD7 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 6); /* disable UART6 module */ + nvicDisableVector(TIVA_UART6_NUMBER); + return; + } +#endif +#if TIVA_SERIAL_USE_UART7 + if (&SD8 == sdp) { + SYSCTL->RCGCUART &= ~(1 << 7); /* disable UART7 module */ + nvicDisableVector(TIVA_UART7_NUMBER); + return; + } +#endif + } +} + +#endif /* CH_HAL_USE_SERIAL */ + +/** @} */ |