diff options
| author | Theodore Ateba <tf.ateba@gmail.com> | 2017-08-16 06:38:35 +0000 |
|---|---|---|
| committer | Theodore Ateba <tf.ateba@gmail.com> | 2017-08-16 06:38:35 +0000 |
| commit | 81208fd6bec3dd581cd29ce05f7be988dba9b8fb (patch) | |
| tree | 2a3c043d8a35d49b01131e2235c44b546a6d8707 /os/hal/ports/AVR/MEGA/LLD/USARTv1 | |
| parent | 2ec713733e3b260987b38e3b7dc6cbb4ba3c5623 (diff) | |
| download | ChibiOS-81208fd6bec3dd581cd29ce05f7be988dba9b8fb.tar.gz ChibiOS-81208fd6bec3dd581cd29ce05f7be988dba9b8fb.tar.bz2 ChibiOS-81208fd6bec3dd581cd29ce05f7be988dba9b8fb.zip | |
Add low level driver directory and platfor for AVR MEGA.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@10431 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/AVR/MEGA/LLD/USARTv1')
| -rw-r--r-- | os/hal/ports/AVR/MEGA/LLD/USARTv1/driver.mk | 9 | ||||
| -rw-r--r-- | os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.c | 408 | ||||
| -rw-r--r-- | os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.h | 158 |
3 files changed, 575 insertions, 0 deletions
diff --git a/os/hal/ports/AVR/MEGA/LLD/USARTv1/driver.mk b/os/hal/ports/AVR/MEGA/LLD/USARTv1/driver.mk new file mode 100644 index 000000000..8472e9538 --- /dev/null +++ b/os/hal/ports/AVR/MEGA/LLD/USARTv1/driver.mk @@ -0,0 +1,9 @@ +ifeq ($(USE_SMART_BUILD),yes)
+ifneq ($(findstring HAL_USE_SERIAL TRUE,$(HALCONF)),)
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/MEGA/USARTv1/hal_serial_lld.c
+endif
+else
+PLATFORMSRC += $(CHIBIOS)/os/hal/ports/AVR/MEGA/USARTv1/hal_serial_lld.c
+endif
+
+PLATFORMINC += $(CHIBIOS)/os/hal/ports/AVR/MEGA/USARTv1
diff --git a/os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.c b/os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.c new file mode 100644 index 000000000..de5143551 --- /dev/null +++ b/os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.c @@ -0,0 +1,408 @@ +/*
+ ChibiOS - Copyright (C) 2006..2016 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 hal_serial_lld.c
+ * @brief AVR low level serial driver code.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#include "hal.h"
+
+#if HAL_USE_SERIAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief USART0 serial driver identifier.
+ * @note The name does not follow the convention used in the other ports
+ * (COMn) because a name conflict with the AVR headers.
+ */
+#if AVR_SERIAL_USE_USART0 || defined(__DOXYGEN__)
+SerialDriver SD1;
+
+ /* USARTs are not consistently named across the AVR range */
+ #ifdef USART0_RX_vect
+ #define AVR_SD1_RX_VECT USART0_RX_vect
+ #define AVR_SD1_TX_VECT USART0_UDRE_vect
+ #elif defined(USART_RX_vect)
+ #define AVR_SD1_RX_VECT USART_RX_vect
+ #define AVR_SD1_TX_VECT USART_UDRE_vect
+ #elif defined(USART0_RXC_vect)
+ #define AVR_SD1_RX_VECT USART0_RXC_vect
+ #define AVR_SD1_TX_VECT USART0_UDRE_vect
+ #else
+ #error "Cannot find USART to use for SD1"
+ #endif
+#endif /* AVR_SERIAL_USE_USART0 */
+
+/**
+ * @brief USART1 serial driver identifier.
+ * @note The name does not follow the convention used in the other ports
+ * (COMn) because a name conflict with the AVR headers.
+ */
+#if AVR_SERIAL_USE_USART1 || defined(__DOXYGEN__)
+SerialDriver SD2;
+
+ /* Check if USART1 exists for this MCU */
+ #ifdef USART1_RX_vect
+ #define AVR_SD2_RX_VECT USART1_RX_vect
+ #define AVR_SD2_TX_VECT USART1_UDRE_vect
+ #elif defined (USART1_RXC_vect)
+ #define AVR_SD2_RX_VECT USART1_RXC_vect
+ #define AVR_SD2_TX_VECT USART1_UDRE_vect
+ #else
+ #error "Cannot find USART to use for SD2"
+ #endif
+#endif /* AVR_SERIAL_USE_USART1 */
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Driver default configuration.
+ */
+static const SerialConfig default_config = {
+ UBRR2x_F(SERIAL_DEFAULT_BITRATE),
+ USART_CHAR_SIZE_8
+};
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+static void set_error(uint8_t sra, SerialDriver *sdp) {
+ eventflags_t sts = 0;
+ uint8_t dor = 0;
+ uint8_t upe = 0;
+ uint8_t fe = 0;
+
+#if AVR_SERIAL_USE_USART0
+ if (&SD1 == sdp) {
+ dor = (1 << DOR0);
+ upe = (1 << UPE0);
+ fe = (1 << FE0);
+ }
+#endif
+
+#if AVR_SERIAL_USE_USART1
+ if (&SD2 == sdp) {
+ dor = (1 << DOR1);
+ upe = (1 << UPE1);
+ fe = (1 << FE1);
+ }
+#endif
+
+ if (sra & dor)
+ sts |= SD_OVERRUN_ERROR;
+ if (sra & upe)
+ sts |= SD_PARITY_ERROR;
+ if (sra & fe)
+ sts |= SD_FRAMING_ERROR;
+ osalSysLockFromISR();
+ chnAddFlagsI(sdp, sts);
+ osalSysUnlockFromISR();
+}
+
+#if AVR_SERIAL_USE_USART0 || defined(__DOXYGEN__)
+static void notify1(io_queue_t *qp) {
+
+ (void)qp;
+ UCSR0B |= (1 << UDRIE0);
+}
+
+/**
+ * @brief USART0 initialization.
+ *
+ * @param[in] config the architecture-dependent serial driver configuration
+ */
+static void usart0_init(const SerialConfig *config) {
+
+ uint8_t ucsr0c;
+
+ UBRR0L = config->sc_brr;
+ UBRR0H = (config->sc_brr >> 8) & 0x0f;
+ UCSR0A = (1 << U2X0);
+ UCSR0B = (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0);
+ switch (config->sc_bits_per_char) {
+ case USART_CHAR_SIZE_5:
+ ucsr0c = 0;
+ break;
+ case USART_CHAR_SIZE_6:
+ ucsr0c = (1 << UCSZ00);
+ break;
+ case USART_CHAR_SIZE_7:
+ ucsr0c = (1 << UCSZ01);
+ break;
+ case USART_CHAR_SIZE_9:
+ UCSR0B |= (1 << UCSZ02);
+ ucsr0c = (1 << UCSZ00) | (1 << UCSZ01);
+ break;
+ case USART_CHAR_SIZE_8:
+ default:
+ ucsr0c = (1 << UCSZ00) | (1 << UCSZ01);
+ }
+
+#if defined(__AVR_ATmega162__)
+ UCSR0C = (1 << URSEL0) | ucsr0c;
+#else
+ UCSR0C = ucsr0c;
+#endif
+}
+
+/**
+ * @brief USART0 de-initialization.
+ */
+static void usart0_deinit(void) {
+
+ UCSR0A = 0;
+ UCSR0B = 0;
+#if defined(__AVR_ATmega162__)
+ UCSR0C = (1 << URSEL0);
+#else
+ UCSR0C = 0;
+#endif
+}
+#endif
+
+#if AVR_SERIAL_USE_USART1 || defined(__DOXYGEN__)
+static void notify2(io_queue_t *qp) {
+
+ (void)qp;
+ UCSR1B |= (1 << UDRIE1);
+}
+
+/**
+ * @brief USART1 initialization.
+ *
+ * @param[in] config the architecture-dependent serial driver configuration
+ */
+static void usart1_init(const SerialConfig *config) {
+
+ uint8_t ucsr1c;
+
+ UBRR1L = config->sc_brr;
+ UBRR1H = (config->sc_brr >> 8) & 0x0f;
+ UCSR1A = (1 << U2X0);
+ UCSR1B = (1 << RXEN1) | (1 << TXEN1) | (1 << RXCIE1);
+ switch (config->sc_bits_per_char) {
+ case USART_CHAR_SIZE_5:
+ ucsr1c = 0;
+ break;
+ case USART_CHAR_SIZE_6:
+ ucsr1c = (1 << UCSZ10);
+ break;
+ case USART_CHAR_SIZE_7:
+ ucsr1c = (1 << UCSZ11);
+ break;
+ case USART_CHAR_SIZE_9:
+ UCSR1B |= (1 << UCSZ12);
+ ucsr1c = (1 << UCSZ10) | (1 << UCSZ11);
+ break;
+ case USART_CHAR_SIZE_8:
+ default:
+ ucsr1c = (1 << UCSZ10) | (1 << UCSZ11);
+ }
+
+#if defined(__AVR_ATmega162__)
+ UCSR1C = (1 << URSEL1) | ucsr1c;
+#else
+ UCSR1C = ucsr1c;
+#endif
+}
+
+/**
+ * @brief USART1 de-initialization.
+ */
+static void usart1_deinit(void) {
+
+ UCSR1A = 0;
+ UCSR1B = 0;
+#if defined(__AVR_ATmega162__)
+ UCSR1C = (1 << URSEL1);
+#else
+ UCSR1C = 0;
+#endif
+}
+#endif
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if AVR_SERIAL_USE_USART0 || defined(__DOXYGEN__)
+/**
+ * @brief USART0 RX interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(AVR_SD1_RX_VECT) {
+ uint8_t sra;
+
+ OSAL_IRQ_PROLOGUE();
+
+ sra = UCSR0A;
+ if (sra & ((1 << DOR0) | (1 << UPE0) | (1 << FE0)))
+ set_error(sra, &SD1);
+ osalSysLockFromISR();
+ sdIncomingDataI(&SD1, UDR0);
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+
+/**
+ * @brief USART0 TX interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(AVR_SD1_TX_VECT) {
+ msg_t b;
+
+ OSAL_IRQ_PROLOGUE();
+
+ osalSysLockFromISR();
+ b = sdRequestDataI(&SD1);
+ osalSysUnlockFromISR();
+ if (b < MSG_OK)
+ UCSR0B &= ~(1 << UDRIE0);
+ else
+ UDR0 = b;
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif /* AVR_SERIAL_USE_USART0 */
+
+#if AVR_SERIAL_USE_USART1 || defined(__DOXYGEN__)
+/**
+ * @brief USART1 RX interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(AVR_SD2_RX_VECT) {
+ uint8_t sra;
+
+ OSAL_IRQ_PROLOGUE();
+
+ sra = UCSR1A;
+ if (sra & ((1 << DOR1) | (1 << UPE1) | (1 << FE1)))
+ set_error(sra, &SD2);
+ osalSysLockFromISR();
+ sdIncomingDataI(&SD2, UDR1);
+ osalSysUnlockFromISR();
+
+ OSAL_IRQ_EPILOGUE();
+}
+
+/**
+ * @brief USART1 TX interrupt handler.
+ *
+ * @isr
+ */
+OSAL_IRQ_HANDLER(AVR_SD2_TX_VECT) {
+ msg_t b;
+
+ OSAL_IRQ_PROLOGUE();
+
+ osalSysLockFromISR();
+ b = sdRequestDataI(&SD2);
+ osalSysUnlockFromISR();
+ if (b < MSG_OK)
+ UCSR1B &= ~(1 << UDRIE1);
+ else
+ UDR1 = b;
+
+ OSAL_IRQ_EPILOGUE();
+}
+#endif /* AVR_SERIAL_USE_USART1 */
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level serial driver initialization.
+ *
+ * @notapi
+ */
+void sd_lld_init(void) {
+
+#if AVR_SERIAL_USE_USART0
+ sdObjectInit(&SD1, NULL, notify1);
+#endif
+#if AVR_SERIAL_USE_USART1
+ sdObjectInit(&SD2, NULL, notify2);
+#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 AVR_SERIAL_USE_USART0
+ if (&SD1 == sdp) {
+ usart0_init(config);
+ return;
+ }
+#endif
+#if AVR_SERIAL_USE_USART1
+ if (&SD2 == sdp) {
+ usart1_init(config);
+ return;
+ }
+#endif
+}
+
+/**
+ * @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 AVR_SERIAL_USE_USART0
+ if (&SD1 == sdp)
+ usart0_deinit();
+#endif
+#if AVR_SERIAL_USE_USART1
+ if (&SD2 == sdp)
+ usart1_deinit();
+#endif
+}
+
+#endif /* HAL_USE_SERIAL */
+
+/** @} */
diff --git a/os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.h b/os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.h new file mode 100644 index 000000000..be53a0487 --- /dev/null +++ b/os/hal/ports/AVR/MEGA/LLD/USARTv1/hal_serial_lld.h @@ -0,0 +1,158 @@ +/*
+ ChibiOS - Copyright (C) 2006..2016 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 hal_serial_lld.h
+ * @brief AVR low level serial driver header.
+ *
+ * @addtogroup SERIAL
+ * @{
+ */
+
+#ifndef HAL_SERIAL_LLD_H
+#define HAL_SERIAL_LLD_H
+
+#if HAL_USE_SERIAL || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief USART0 driver enable switch.
+ * @details If set to @p TRUE the support for USART0 is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(AVR_SERIAL_USE_USART0) || defined(__DOXYGEN__)
+ #define AVR_SERIAL_USE_USART0 TRUE
+#endif
+
+/**
+ * @brief USART1 driver enable switch.
+ * @details If set to @p TRUE the support for USART1 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(AVR_SERIAL_USE_USART1) || defined(__DOXYGEN__)
+#define AVR_SERIAL_USE_USART1 TRUE
+#endif
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief AVR Serial Driver configuration structure.
+ * @details An instance of this structure must be passed to @p sdStart()
+ * in order to configure and start a serial driver operations.
+ */
+typedef struct {
+ /**
+ * @brief Initialization value for the BRR register.
+ */
+ uint16_t sc_brr;
+ /**
+ * @brief Number of bits per character (USART_CHAR_SIZE_5 to USART_CHAR_SIZE_9).
+ */
+ uint8_t sc_bits_per_char;
+} SerialConfig;
+
+/**
+ * @brief @p SerialDriver specific data.
+ */
+#define _serial_driver_data \
+ _base_asynchronous_channel_data \
+ /* Driver state.*/ \
+ sdstate_t state; \
+ /* Input queue.*/ \
+ input_queue_t iqueue; \
+ /* Output queue.*/ \
+ output_queue_t oqueue; \
+ /* Input circular buffer.*/ \
+ uint8_t ib[SERIAL_BUFFERS_SIZE]; \
+ /* Output circular buffer.*/ \
+ uint8_t ob[SERIAL_BUFFERS_SIZE]; \
+ /* End of the mandatory fields.*/
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/**
+ * @brief Macro for baud rate computation.
+ * @note Make sure the final baud rate is within tolerance.
+ */
+#define UBRR(b) (((F_CPU / b) >> 4) - 1)
+
+/**
+ * @brief Macro for baud rate computation when U2Xn == 1.
+ * @note Make sure the final baud rate is within tolerance.
+ */
+#define UBRR2x(b) (((F_CPU / b) >> 3) - 1)
+
+/**
+* @brief Macro for baud rate computation.
+* @note Make sure the final baud rate is within tolerance.
+* @note This version uses floating point math for greater accuracy.
+*/
+#define UBRR_F(b) ((((double) F_CPU / (double) b) / 16.0) - 0.5)
+
+/**
+* @brief Macro for baud rate computation when U2Xn == 1.
+* @note Make sure the final baud rate is within tolerance.
+* @note This version uses floating point math for greater accuracy.
+*/
+#define UBRR2x_F(b) ((((double) F_CPU / (double) b) / 8.0) - 0.5)
+
+#define USART_CHAR_SIZE_5 0
+#define USART_CHAR_SIZE_6 1
+#define USART_CHAR_SIZE_7 2
+#define USART_CHAR_SIZE_8 3
+#define USART_CHAR_SIZE_9 4
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if AVR_SERIAL_USE_USART0 && !defined(__DOXYGEN__)
+extern SerialDriver SD1;
+#endif
+#if AVR_SERIAL_USE_USART1 && !defined(__DOXYGEN__)
+extern SerialDriver SD2;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void sd_lld_init(void);
+ void sd_lld_start(SerialDriver *sdp, const SerialConfig *config);
+ void sd_lld_stop(SerialDriver *sdp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_SERIAL */
+
+#endif /* HAL_SERIAL_LLD_H */
+
+/** @} */
|