From abbf5a2ef4b46218a1b24ef6afd6cf7b35a87e55 Mon Sep 17 00:00:00 2001
From: Drew Barbier <dbarbi1@gmail.com>
Date: Mon, 2 Jul 2018 00:40:06 -0500
Subject: e2 and clic start

---
 software/clic_vectored/Makefile        |  10 ++++
 software/clic_vectored/clic_vectored   | Bin 0 -> 73836 bytes
 software/clic_vectored/clic_vectored.c |  95 +++++++++++++++++++++++++++++++++
 3 files changed, 105 insertions(+)
 create mode 100644 software/clic_vectored/Makefile
 create mode 100755 software/clic_vectored/clic_vectored
 create mode 100644 software/clic_vectored/clic_vectored.c

(limited to 'software')

diff --git a/software/clic_vectored/Makefile b/software/clic_vectored/Makefile
new file mode 100644
index 0000000..d6e2342
--- /dev/null
+++ b/software/clic_vectored/Makefile
@@ -0,0 +1,10 @@
+TARGET = clic_vectored
+CFLAGS += -Og -fno-builtin-printf
+
+BSP_BASE = ../../bsp
+
+C_SRCS += clic_vectored.c
+
+C_SRCS += $(BSP_BASE)/drivers/clic/clic_driver.c
+
+include $(BSP_BASE)/env/common.mk
diff --git a/software/clic_vectored/clic_vectored b/software/clic_vectored/clic_vectored
new file mode 100755
index 0000000..df33c93
Binary files /dev/null and b/software/clic_vectored/clic_vectored differ
diff --git a/software/clic_vectored/clic_vectored.c b/software/clic_vectored/clic_vectored.c
new file mode 100644
index 0000000..9ae99e3
--- /dev/null
+++ b/software/clic_vectored/clic_vectored.c
@@ -0,0 +1,95 @@
+// See LICENSE for license details.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "platform.h"
+#include <string.h>
+#include "encoding.h"
+#include <unistd.h>
+#include "sifive/devices/clic.h"
+#include "clic/clic_driver.h"
+
+#ifndef _SIFIVE_COREPLEXIP_ARTY_H
+#error 'local_interrupts' demo only supported for Core IP Eval Kits
+#endif
+
+// Global Variable used to show
+// software interrupts.
+volatile uint32_t g_debouncing;
+
+// vector table defined in init.c
+typedef void (*interrupt_function_ptr_t) (void);
+extern interrupt_function_ptr_t localISR[CLIC_NUM_INTERRUPTS]; 
+extern void default_handler(void);
+
+//clic data structure
+clic_instance_t clic;
+
+const char * instructions_msg = " \
+\n\
+                         SiFive, Inc\n\
+ E21 Core IP Eval Kit 'clic_interrupts' demo.\n\
+\n\
+The Buttons 0-3 and Switch 3 are enabled as local\n\
+interrupts sources. A .5 s 'debounce' timer is used \n\
+between these interrupts. Software interrupts are\n\
+used to print a message while debouncing.\n\
+Note the priority of the interrupts sources.\n\
+\n";
+
+void print_instructions() {
+
+  //write (STDERR_FILENO, instructions_msg, strlen(instructions_msg));
+  printf(instructions_msg);
+
+}
+
+void button_0_isr(void)__attribute__((interrupt("SiFive-CLIC-preemptible")));
+void button_0_isr(void) {
+  // Toggle Red LED
+  const char button_0_msg[] = "Button 0 was pressed. Toggle Red.\n";
+  write (STDOUT_FILENO, button_0_msg, strlen(button_0_msg));  
+  GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << RED_LED_OFFSET);
+  clic_clear_pending(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
+  clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
+}
+
+void button_0_setup(void) {
+  clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0), button_0_isr);
+  clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
+}
+
+void config_gpio()  {
+  // Configure LEDs as outputs.
+  GPIO_REG(GPIO_INPUT_EN)    &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
+  GPIO_REG(GPIO_OUTPUT_EN)   |=  ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ;
+  GPIO_REG(GPIO_OUTPUT_VAL)  &= ((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)|  (0x1 << BLUE_LED_OFFSET)) ;
+}
+
+int main(int argc, char **argv)
+{
+  clear_csr(mstatus, MSTATUS_MIE);
+  clear_csr(mie, IRQ_M_SOFT);
+  clear_csr(mie, IRQ_M_TIMER);
+
+
+  clic_init(&clic, CLIC_HART0_ADDR, 
+            (interrupt_function_ptr_t*)localISR,
+            default_handler,
+            CLIC_NUM_INTERRUPTS,
+            CLIC_NUM_CONFIG_BITS);
+
+
+  config_gpio();
+  button_0_setup();
+
+  // Enable all global interrupts
+  set_csr(mstatus, MSTATUS_MIE);
+
+
+  print_instructions();
+  while(1);
+
+  return 0;
+
+}
-- 
cgit v1.2.1-18-gbd029