diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc31xx/lpc31_softreset.c')
-rwxr-xr-x | nuttx/arch/arm/src/lpc31xx/lpc31_softreset.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/lpc31xx/lpc31_softreset.c b/nuttx/arch/arm/src/lpc31xx/lpc31_softreset.c new file mode 100755 index 000000000..8bf9ef12a --- /dev/null +++ b/nuttx/arch/arm/src/lpc31xx/lpc31_softreset.c @@ -0,0 +1,90 @@ +/************************************************************************ + * arch/arm/src/lpc31xx/lpc31_softreset.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * References: + * - UM10314 LPC3130/31 User manual Rev. 1.01 — 9 September 2009 + * - lpc313x.cdl.drivers.zip example driver code + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS 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. + * + ************************************************************************/ + +/************************************************************************ + * Included Files + ************************************************************************/ + +#include <nuttx/config.h> +#include <stdint.h> + +#include "up_arch.h" +#include "lpc31_cgudrvr.h" + +/************************************************************************ + * Pre-processor Definitions + ************************************************************************/ + +/************************************************************************ + * Private Data + ************************************************************************/ + +/************************************************************************ + * Private Functions + ************************************************************************/ + +/************************************************************************ + * Public Functions + ************************************************************************/ + +/************************************************************************ + * Name: lpc31_softreset + * + * Description: + * Perform a soft reset on the specified module. + * + ************************************************************************/ + +void lpc31_softreset(enum lpc31_resetid_e resetid) +{ + uint32_t address = LPC31_CGU_SOFTRST(resetid); + volatile int i; + + /* Clear and set the register */ + + putreg32(0, address); + + /* Delay a bit */ + + for (i = 0;i < 1000; i++); + + /* Then set the the soft reset bit */ + + putreg32(CGU_SOFTRESET, address); +} |