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https://github.com/RIOT-OS/RIOT.git
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120 lines
2.8 KiB
C
120 lines
2.8 KiB
C
/*
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* Copyright 2008, Freie Universitaet Berlin (FUB). All rights reserved.
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*
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* These sources were developed at the Freie Universitaet Berlin, Computer Systems
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* and Telematics group (http://cst.mi.fu-berlin.de).
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* ----------------------------------------------------------------------------
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* This file is part of RIOT.
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*
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*******************************************************************************/
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/**
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* @ingroup drivers_cc110x_ng
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* @{
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*
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* @file cc110x_spi.c
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* @brief TI Chipcon CC1100 SPI driver
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*
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* @author Thomas Hillebrandt <hillebra@inf.fu-berlin.de>
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* @author Heiko Will <hwill@inf.fu-berlin.de>
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* @}
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*/
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#include <stdio.h>
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#include "cc110x_ng.h"
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#include "cc110x-internal.h"
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#include "irq.h"
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/*---------------------------------------------------------------------------*/
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// CC1100 SPI access
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/*---------------------------------------------------------------------------*/
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uint8_t cc110x_writeburst_reg(uint8_t addr, char *src, uint8_t count)
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{
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int i = 0;
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unsigned int cpsr = disableIRQ();
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cc110x_spi_select();
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cc110x_txrx(addr | CC1100_WRITE_BURST);
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while (i < count) {
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cc110x_txrx(src[i]);
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i++;
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}
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cc110x_spi_unselect();
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restoreIRQ(cpsr);
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return count;
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}
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void cc110x_readburst_reg(uint8_t addr, char *buffer, uint8_t count)
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{
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int i = 0;
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unsigned int cpsr = disableIRQ();
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cc110x_spi_select();
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cc110x_txrx(addr | CC1100_READ_BURST);
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while (i < count) {
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buffer[i] = cc110x_txrx(CC1100_NOBYTE);
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i++;
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}
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cc110x_spi_unselect();
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restoreIRQ(cpsr);
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}
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void cc110x_read_fifo(char *buffer, uint8_t count)
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{
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cc110x_readburst_reg(CC1100_RXFIFO, buffer, count);
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}
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void cc110x_write_reg(uint8_t addr, uint8_t value)
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{
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unsigned int cpsr = disableIRQ();
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cc110x_spi_select();
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cc110x_txrx(addr);
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cc110x_txrx(value);
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cc110x_spi_unselect();
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restoreIRQ(cpsr);
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}
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uint8_t cc110x_read_reg(uint8_t addr)
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{
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uint8_t result;
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unsigned int cpsr = disableIRQ();
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cc110x_spi_select();
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cc110x_txrx(addr | CC1100_READ_SINGLE);
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result = cc110x_txrx(CC1100_NOBYTE);
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cc110x_spi_unselect();
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restoreIRQ(cpsr);
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return result;
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}
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uint8_t cc110x_read_status(uint8_t addr)
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{
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uint8_t result;
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unsigned int cpsr = disableIRQ();
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cc110x_spi_select();
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cc110x_txrx(addr | CC1100_READ_BURST);
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result = cc110x_txrx(CC1100_NOBYTE);
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cc110x_spi_unselect();
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restoreIRQ(cpsr);
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return result;
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}
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uint8_t cc110x_strobe(uint8_t c)
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{
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uint8_t result;
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unsigned int cpsr = disableIRQ();
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cc110x_spi_select();
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result = cc110x_txrx(c);
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cc110x_spi_unselect();
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restoreIRQ(cpsr);
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return result;
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}
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