From f6c7d92c4f5319ef737a0f726d945471ee084a2b Mon Sep 17 00:00:00 2001 From: Karl Palsson Date: Thu, 3 Mar 2016 23:55:54 +0000 Subject: [PATCH] stm32l4: enable FPU in chipset specific startup. Helpful if you don't like seeing: (gdb) vecstate HardFault: forced due to escalated or disabled configurable fault (see below) UsageFault due to access to disabled/absent coprocessor --- lib/dispatch/vector_chipset.c | 2 ++ lib/stm32/l4/vector_chipset.c | 27 +++++++++++++++++++++++++++ 2 files changed, 29 insertions(+) create mode 100644 lib/stm32/l4/vector_chipset.c diff --git a/lib/dispatch/vector_chipset.c b/lib/dispatch/vector_chipset.c index 1d13c761..e9c334e0 100644 --- a/lib/dispatch/vector_chipset.c +++ b/lib/dispatch/vector_chipset.c @@ -4,6 +4,8 @@ # include "../stm32/f4/vector_chipset.c" #elif defined(STM32F7) # include "../stm32/f7/vector_chipset.c" +#elif defined(STM32L4) +# include "../stm32/l4/vector_chipset.c" #elif defined(LPC43XX_M4) # include "../lpc43xx/m4/vector_chipset.c" #elif defined(VF6XX) diff --git a/lib/stm32/l4/vector_chipset.c b/lib/stm32/l4/vector_chipset.c new file mode 100644 index 00000000..145be057 --- /dev/null +++ b/lib/stm32/l4/vector_chipset.c @@ -0,0 +1,27 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Piotr Esden-Tempski + * Copyright (C) 2011 Fergus Noble + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include + +static void pre_main(void) +{ + /* Enable access to Floating-Point coprocessor. */ + SCB_CPACR |= SCB_CPACR_FULL * (SCB_CPACR_CP10 | SCB_CPACR_CP11); +}