From 8d97dbc7c31d814e521ad9792fcf1914543288bf Mon Sep 17 00:00:00 2001 From: TitanMKD Date: Sat, 9 Jun 2012 18:27:42 +0200 Subject: Work on scs.h register and also nvic.h. ARM Interrupt API (see nvic.h). ARM SysTick API (see systick.h). Example using both Interrupt and SysTick and blink LED1/2/3 see systickdemo.c. --- lib/lpc43xx/Makefile | 2 +- lib/lpc43xx/nvic.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++ lib/lpc43xx/systick.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 146 insertions(+), 1 deletion(-) create mode 100644 lib/lpc43xx/nvic.c create mode 100644 lib/lpc43xx/systick.c (limited to 'lib') diff --git a/lib/lpc43xx/Makefile b/lib/lpc43xx/Makefile index 38d5bf7..e8bd8fc 100644 --- a/lib/lpc43xx/Makefile +++ b/lib/lpc43xx/Makefile @@ -31,7 +31,7 @@ CFLAGS = -O2 -g -Wall -Wextra -I../../include -fno-common \ -mfloat-abi=hard -mfpu=fpv4-sp-d16 # ARFLAGS = rcsv ARFLAGS = rcs -OBJS = gpio.o vector.o scu.o i2c.o ssp.o +OBJS = gpio.o vector.o scu.o i2c.o ssp.o nvic.o systick.o # VPATH += ../usb diff --git a/lib/lpc43xx/nvic.c b/lib/lpc43xx/nvic.c new file mode 100644 index 0000000..4793312 --- /dev/null +++ b/lib/lpc43xx/nvic.c @@ -0,0 +1,76 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2012 Fergus Noble + * Copyright (C) 2012 Benjamin Vernoux + * + * 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 +#include + +void nvic_enable_irq(u8 irqn) +{ + NVIC_ISER(irqn / 32) = (1 << (irqn % 32)); +} + +void nvic_disable_irq(u8 irqn) +{ + NVIC_ICER(irqn / 32) = (1 << (irqn % 32)); +} + +u8 nvic_get_pending_irq(u8 irqn) +{ + return NVIC_ISPR(irqn / 32) & (1 << (irqn % 32)) ? 1 : 0; +} + +void nvic_set_pending_irq(u8 irqn) +{ + NVIC_ISPR(irqn / 32) = (1 << (irqn % 32)); +} + +void nvic_clear_pending_irq(u8 irqn) +{ + NVIC_ICPR(irqn / 32) = (1 << (irqn % 32)); +} + +u8 nvic_get_active_irq(u8 irqn) +{ + return NVIC_IABR(irqn / 32) & (1 << (irqn % 32)) ? 1 : 0; +} + +u8 nvic_get_irq_enabled(u8 irqn) +{ + return NVIC_ISER(irqn / 32) & (1 << (irqn % 32)) ? 1 : 0; +} + +void nvic_set_priority(u8 irqn, u8 priority) +{ + if(irqn>NVIC_M4_QEI_IRQ) + { + /* Cortex-M system interrupts */ + SCS_SHPR( (irqn&0xF)-4 ) = priority; + }else + { + /* Device specific interrupts */ + NVIC_IPR(irqn) = priority; + } +} + +void nvic_generate_software_interrupt(u8 irqn) +{ + if (irqn <= 239) + NVIC_STIR |= irqn; +} diff --git a/lib/lpc43xx/systick.c b/lib/lpc43xx/systick.c new file mode 100644 index 0000000..82345a9 --- /dev/null +++ b/lib/lpc43xx/systick.c @@ -0,0 +1,69 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2012 Benjamin Vernoux + * + * 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 + +void systick_set_reload(u32 value) +{ + STK_LOAD = (value & 0x00FFFFFF); +} + +u32 systick_get_value(void) +{ + return STK_VAL; +} + +void systick_set_clocksource(u8 clocksource) +{ + STK_CTRL |= clocksource; +} + +void systick_interrupt_enable(void) +{ + STK_CTRL |= STK_CTRL_TICKINT; +} + +void systick_interrupt_disable(void) +{ + STK_CTRL &= ~STK_CTRL_TICKINT; +} + +void systick_counter_enable(void) +{ + STK_CTRL |= STK_CTRL_ENABLE; +} + +void systick_counter_disable(void) +{ + STK_CTRL &= ~STK_CTRL_ENABLE; +} + +u8 systick_get_countflag(void) +{ + if (STK_CTRL & STK_CTRL_COUNTFLAG) + return 1; + else + return 0; +} + +u32 systick_get_calib(void) +{ + return (STK_CALIB&0x00FFFFFF); +} -- cgit v1.2.3