kopia lustrzana https://github.com/bristol-seds/pico-tracker
128 wiersze
4.0 KiB
C
128 wiersze
4.0 KiB
C
/**
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* SAM D20/D21/R21 Serial Peripheral Interface Driver
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*
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* Copyright (C) 2012-2014 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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* \page License
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. This software may only be redistributed and used in connection with an
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* Atmel microcontroller product.
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*
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* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* \asf_license_stop
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*
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*/
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#ifndef SERCOM_H_INCLUDED
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#define SERCOM_H_INCLUDED
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#include "system/system.h"
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#include "system/clock.h"
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#include "sercom/sercom_pinout.h"
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#if (SERCOM0_GCLK_ID_SLOW == SERCOM1_GCLK_ID_SLOW && \
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SERCOM0_GCLK_ID_SLOW == SERCOM2_GCLK_ID_SLOW && \
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SERCOM0_GCLK_ID_SLOW == SERCOM3_GCLK_ID_SLOW)
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# define SERCOM_GCLK_ID SERCOM0_GCLK_ID_SLOW
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#else
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# error "SERCOM modules must share the same slow GCLK channel ID."
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#endif
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#if (0x1ff >= REV_SERCOM)
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# define FEATURE_SERCOM_SYNCBUSY_SCHEME_VERSION_1
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#elif (0x2ff >= REV_SERCOM)
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# define FEATURE_SERCOM_SYNCBUSY_SCHEME_VERSION_2
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#else
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# error "Unknown SYNCBUSY scheme for this SERCOM revision"
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#endif
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/**
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* Status Codes
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*/
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enum sercom_status_t {
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SERCOM_STATUS_OK = 1,
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SERCOM_STATUS_BAUDRATE_UNAVAILABLE,
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SERCOM_STATUS_TIMEOUT,
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SERCOM_STATUS_PACKET_COLLISION,
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SERCOM_STATUS_BUSY,
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SERCOM_STATUS_DENIED,
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SERCOM_STATUS_BAD_FORMAT,
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SERCOM_STATUS_BAD_DATA,
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SERCOM_STATUS_OVERFLOW,
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SERCOM_STATUS_IO,
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SERCOM_STATUS_INVALID_ARG,
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SERCOM_STATUS_ABORTED,
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SERCOM_STATUS_UNSUPPORTED_DEV
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};
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/**
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* Select sercom asynchronous operation mode
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*/
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enum sercom_asynchronous_operation_mode {
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SERCOM_ASYNC_OPERATION_MODE_ARITHMETIC = 0,
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SERCOM_ASYNC_OPERATION_MODE_FRACTIONAL,
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};
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/**
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* Select number of samples per bit
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*/
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enum sercom_asynchronous_sample_num {
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SERCOM_ASYNC_SAMPLE_NUM_3 = 3,
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SERCOM_ASYNC_SAMPLE_NUM_8 = 8,
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SERCOM_ASYNC_SAMPLE_NUM_16 = 16,
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};
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/**
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* Type used for registering interrupt handlers
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*/
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typedef void (*sercom_handler_t)(Sercom* const sercom_instance,
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uint8_t instance_index);
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uint8_t _sercom_get_sercom_inst_index(Sercom *const sercom_instance);
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void _sercom_set_handler(Sercom* const sercom_instance,
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const sercom_handler_t interrupt_handler);
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void _sercom_set_gclk_generator(const enum gclk_generator generator_source);
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enum sercom_status_t _sercom_get_sync_baud_val(const uint32_t baudrate,
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const uint32_t external_clock,
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uint16_t *const baudval);
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enum sercom_status_t _sercom_get_async_baud_val(const uint32_t baudrate,
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const uint32_t peripheral_clock,
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uint16_t *const baudval,
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enum sercom_asynchronous_operation_mode mode,
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enum sercom_asynchronous_sample_num sample_num);
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uint32_t _sercom_get_default_pad(Sercom *const sercom_module,
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const uint8_t pad);
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#endif /* SERCOM_H_INCLUDED */
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