diff options
Diffstat (limited to 'os/hal/ports/AVR/TINY/USARTv1/hal_serial_lld.h')
| -rw-r--r-- | os/hal/ports/AVR/TINY/USARTv1/hal_serial_lld.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/os/hal/ports/AVR/TINY/USARTv1/hal_serial_lld.h b/os/hal/ports/AVR/TINY/USARTv1/hal_serial_lld.h new file mode 100644 index 000000000..be53a0487 --- /dev/null +++ b/os/hal/ports/AVR/TINY/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 */
+
+/** @} */
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