From 044ad7c3987460ede48ff27afd6bdb0ca05a0432 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Mon, 4 Jul 2011 20:52:54 +0200 Subject: import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v15011 it's sad to see that atmel doesn't publish their svn repo or has a centralized location or even puts proper version/release info into the library itself --- peripherals/systick/systick.c | 63 ++++++++++++++++++++++++++++++++++++++ peripherals/systick/systick.dir | 36 ++++++++++++++++++++++ peripherals/systick/systick.h | 68 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 167 insertions(+) create mode 100644 peripherals/systick/systick.c create mode 100644 peripherals/systick/systick.dir create mode 100644 peripherals/systick/systick.h (limited to 'peripherals/systick') diff --git a/peripherals/systick/systick.c b/peripherals/systick/systick.c new file mode 100644 index 0000000..c5d2d15 --- /dev/null +++ b/peripherals/systick/systick.c @@ -0,0 +1,63 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ + +#include "systick.h" + +//------------------------------------------------------------------------------ +/// Configures the SysTick in . +/// \param countEnable Enable SysTick counting. +/// \param reloadValue Value used for tick counter to reload. +/// \param handler Interrupt handler function, 0 to disable interrupt. +//------------------------------------------------------------------------------ +void SysTick_Configure(unsigned char countEnable, + unsigned int reloadValue, + void( *handler )( void )) +{ + unsigned int intEnable = handler ? AT91C_NVIC_STICKINT : 0; + + // Disable the SysTick & using core source + AT91C_BASE_NVIC->NVIC_STICKCSR = AT91C_NVIC_STICKCLKSOURCE; + + // Reset the current value + AT91C_BASE_NVIC->NVIC_STICKCVR &= ~(unsigned int)AT91C_NVIC_STICKCURRENT; + + // Setup the reload value + AT91C_BASE_NVIC->NVIC_STICKRVR = reloadValue; + + // Enable the SysTick + AT91C_BASE_NVIC->NVIC_STICKCSR = AT91C_NVIC_STICKCLKSOURCE + | AT91C_NVIC_STICKENABLE + | intEnable; + +} + diff --git a/peripherals/systick/systick.dir b/peripherals/systick/systick.dir new file mode 100644 index 0000000..a6bf46f --- /dev/null +++ b/peripherals/systick/systick.dir @@ -0,0 +1,36 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +/// \dir +/// +/// !!!Purpose +/// +/// This directory contains an API for Configure the System Tick for Cortex-M3 +//------------------------------------------------------------------------------ \ No newline at end of file diff --git a/peripherals/systick/systick.h b/peripherals/systick/systick.h new file mode 100644 index 0000000..a3a0544 --- /dev/null +++ b/peripherals/systick/systick.h @@ -0,0 +1,68 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//------------------------------------------------------------------------------ +/// \unit +/// +/// !Purpose +/// +/// Methods and definitions for configuring System Tick in Cortex-M3. +/// +/// !Usage +/// +/// -# Configure the System Tick with SysTick_Configure +/// +//------------------------------------------------------------------------------ + +#ifndef SYSTICK_H +#define SYSTICK_H + +//------------------------------------------------------------------------------ +// Headers +//------------------------------------------------------------------------------ + +#include +#include + +//------------------------------------------------------------------------------ +// Definitions +//------------------------------------------------------------------------------ + +/// Vendor define it's own SysTickConfig function +#define __Vendor_SysTickConfig 1 + +//------------------------------------------------------------------------------ +// Global functions +//------------------------------------------------------------------------------ + +extern void SysTick_Configure(unsigned char countEnable, + unsigned int reloadValue, + void( *handler )( void )); + +#endif //#ifndef SYSTICK_H -- cgit v1.2.3