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authorTitanMKD2012-06-09 18:27:42 +0200
committerTitanMKD2012-06-09 18:27:42 +0200
commit8d97dbc7c31d814e521ad9792fcf1914543288bf (patch)
tree6125b2735d21d779e65666a2cfe5d91dde02f02f /lib
parent161aad0139deff9e65832a6bb7c87bccd80612f0 (diff)
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.
Diffstat (limited to 'lib')
-rw-r--r--lib/lpc43xx/Makefile2
-rw-r--r--lib/lpc43xx/nvic.c76
-rw-r--r--lib/lpc43xx/systick.c69
3 files changed, 146 insertions, 1 deletions
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 <tommi@viadmin.org>
+ * Copyright (C) 2012 Fergus Noble <fergusnoble@gmail.com>
+ * Copyright (C) 2012 Benjamin Vernoux <titanmkd@gmail.com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+#include <libopencm3/cm3/scs.h>
+#include <libopencm3/lpc43xx/nvic.h>
+
+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 <tommi@viadmin.org>
+ * Copyright (C) 2012 Benjamin Vernoux <titanmkd@gmail.com>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/lpc43xx/systick.h>
+
+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);
+}