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RIOT supports two distinct families of the MSP430: The [MSP430 x1xx]
MCU family and the [MSP430 F2xx/G2xx] MCU family. For both incompatible
MCU families the code was located in the msp430fxyz folder, resulting
in case of the UART driver in particularly bizarre code looking roughly
like this:
#ifndef UART_USE_USCI
/* implementation of x1xx peripheral ... */
#else
/* implementation of F2xx/G2xx peripheral ... */
#endif
/* zero shared code between both variants */
This splits the peripheral drivers for USCI and USART serial IP blocks
into separate files and relocates everything in cpu/msp430, similar to
how cpu/stm32 is organized.
[MSP430 x1xx]: https://www.ti.com/lit/ug/slau049f/slau049f.pdf
[MSP430 F2xx/G2xx]: https://www.ti.com/lit/ug/slau144k/slau144k.pdf
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/*
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* Copyright (C) 2020 Otto-von-Guericke-Universität Magdeburg
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup cpu_msp430
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*
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* @{
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*
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* @file
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* @brief Implementation of fast atomic utility functions
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* @author Marian Buschsieweke <marian.buschsieweke@ovgu.de>
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*/
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#ifndef ATOMIC_UTILS_ARCH_H
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#define ATOMIC_UTILS_ARCH_H
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#ifndef DOXYGEN
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#include "periph_cpu.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* clang provides no built-in atomic access to regular variables */
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#ifndef __clang__
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#define HAS_ATOMIC_LOAD_U8
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static inline uint8_t atomic_load_u8(const volatile uint8_t *var)
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{
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return __atomic_load_1(var, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_LOAD_U16
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static inline uint16_t atomic_load_u16(const volatile uint16_t *var)
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{
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return __atomic_load_2(var, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_STORE_U8
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static inline void atomic_store_u8(volatile uint8_t *dest, uint8_t val)
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{
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__atomic_store_1(dest, val, __ATOMIC_SEQ_CST);
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}
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#define HAS_ATOMIC_STORE_U16
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static inline void atomic_store_u16(volatile uint16_t *dest, uint16_t val)
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{
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__atomic_store_2(dest, val, __ATOMIC_SEQ_CST);
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}
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#endif /* __clang__ */
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#ifdef __cplusplus
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}
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#endif
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#endif /* DOXYGEN */
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#endif /* ATOMIC_UTILS_ARCH_H */
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/** @} */
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