E31 vectored_interrupt.c as a linked file

2 files changed, 5 insertions, 216 deletions

diff --git a/FreedomStudio/E31FPGA/vectored_interrupts/.project b/FreedomStudio/E31FPGA/vectored_interrupts/.project
index 331760e..f34dc51 100644
--- a/FreedomStudio/E31FPGA/vectored_interrupts/.project
+++ b/FreedomStudio/E31FPGA/vectored_interrupts/.project
@@ -30,6 +30,11 @@
 			<locationURI>virtual:/virtual</locationURI>
 		</link>
 		<link>
+			<name>vectored_interrupts.c</name>
+			<type>1</type>
+			<locationURI>PARENT-3-PROJECT_LOC/software/vectored_interrupts/vectored_interrupts.c</locationURI>
+		</link>
+		<link>
 			<name>bsp/.DS_Store</name>
 			<type>1</type>
 			<locationURI>PARENT-3-PROJECT_LOC/bsp/.DS_Store</locationURI>
diff --git a/FreedomStudio/E31FPGA/vectored_interrupts/vectored_interrupts.c b/FreedomStudio/E31FPGA/vectored_interrupts/vectored_interrupts.c
deleted file mode 100644
index 8958105..0000000
--- a/FreedomStudio/E31FPGA/vectored_interrupts/vectored_interrupts.c
+++ /dev/null
@@ -1,216 +0,0 @@
-// See LICENSE for license details.
-
-#include <stdio.h>
-#include <stdlib.h>
-#include "platform.h"
-#include <string.h>
-#include "plic/plic_driver.h"
-#include "encoding.h"
-#include <unistd.h>
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'global_interrupts' demo only supported for Coreplex IP Eval Kits
-#endif
-
-// Global Instance data for the PLIC
-// for use by the PLIC Driver.
-plic_instance_t g_plic;
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*interrupt_function_ptr_t) (void);
-//array of function pointers which contains the PLIC
-//interrupt handlers
-interrupt_function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS];
-
-const char * instructions_msg = " \
-\n\
-                SIFIVE, INC.\n\
-E31/E51 Coreplex IP Eval Kit 'vectored_interrupts' demo.  \n\
-\n\
-This demo demonstrates Vectored Interrupts capabilities of\n\
-the E31/E51 Coreplex. The vector table is defined in      \n\
-bsp/env/ventry.S                                          \n\
-Button 0 is a global external interrupt routed to the PLIC.\n\
-Button 1 is a local interrupt.\n\
-\n";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-void set_timer() {
-  
-  volatile uint64_t * mtime       = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-  volatile uint64_t * mtimecmp    = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-  uint64_t now = *mtime;
-  uint64_t then = now + 1*RTC_FREQ;
-  *mtimecmp = then;
-
-  set_csr(mie, MIP_MTIP);
-}
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-/*called from bsp/env/ventry.s          */
-void handle_m_time_interrupt(){
-  static uint32_t onoff=1;
-
-  clear_csr(mie, MIP_MTIP);
-
-  // Set Green LED
-  if(onoff)	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << GREEN_LED_OFFSET) ;
-	  onoff=0;
-  }else	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1 << GREEN_LED_OFFSET)) ;
-	  onoff=1;
-  }
-  set_timer();
-
-  //re-enable button1 irq
-  set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-
-}
-
-/*Synchronous Trap Handler*/
-/*called from bsp/env/ventry.s          */
-void handle_sync_trap(uintptr_t mcause, uintptr_t epc ) {
-    write(1, "vUnhandled Trap:\n", 16);
-    _exit(1 + mcause);
-}
-
-/*Entry Point for PLIC Interrupt Handler*/
-/*called from bsp/env/ventry.s          */
-void handle_m_external_interrupt(){
-  printf("In PLIC handler\n");
-  plic_source int_num  = PLIC_claim_interrupt(&g_plic);
-  if ((int_num >=1 ) && (int_num < PLIC_NUM_INTERRUPTS)) {
-    g_ext_interrupt_handlers[int_num]();
-  }
-  else {
-    exit(1 + (uintptr_t) int_num);
-  }
-  PLIC_complete_interrupt(&g_plic, int_num);
-}
-
-//default empty PLIC handler
-void invalid_global_isr() {
-  printf("Unexpected global interrupt!\n");
-}
-
-/* b0 global interrupt isr                */
-/*called from handle_m_external_interrupt */
-void button_0_handler() {
-  static uint32_t onoff=1;
-  // Set Green LED
-
-  printf("In Button 0 handler\n");
-
-  if(onoff)	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << BLUE_LED_OFFSET) ;
-	  onoff=0;
-  }else	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1 << BLUE_LED_OFFSET)) ;
-	  onoff=1;
-  }
-
-  //clear irq - interrupt pending register is write 1 to clear
-  GPIO_REG(GPIO_FALL_IP) |= (1<<BUTTON_0_OFFSET);
-}
-
-/*b1 local vectored irq handler         */
-/*called from bsp/env/ventry.s          */
-void handle_local_interrupt5() {
-  static uint32_t onoff=1;
-  // Set Green LED
-
-  printf("In Button 1 handler\n");
-
-  if(onoff)	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  |=  (0x1 << RED_LED_OFFSET) ;
-	  onoff=0;
-  }else	{
-	  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1 << RED_LED_OFFSET)) ;
-	  onoff=1;
-  }
-
-  //debounce by turning off until next timer tick
-  clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-}
-
-/*configures Button0 as a global gpio irq*/
-void b0_irq_init()  {
-
-    //dissable hw io function
-    GPIO_REG(GPIO_IOF_EN )    &=  ~(1 << BUTTON_0_OFFSET);
-
-    //set to input
-    GPIO_REG(GPIO_INPUT_EN)   |= (1<<BUTTON_0_OFFSET);
-    GPIO_REG(GPIO_PULLUP_EN)  |= (1<<BUTTON_0_OFFSET);
-
-    //set to interrupt on falling edge
-    GPIO_REG(GPIO_FALL_IE)    |= (1<<BUTTON_0_OFFSET);
-
-    PLIC_init(&g_plic,
-  	    PLIC_CTRL_ADDR,
-  	    PLIC_NUM_INTERRUPTS,
-  	    PLIC_NUM_PRIORITIES);
-
-    PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_0);
-    PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_0, 2);
-    g_ext_interrupt_handlers[INT_DEVICE_BUTTON_0] = button_0_handler;
-}
-
-/*configures Button1 as a local interrupt*/
-void b1_irq_init()  {
-
-    //enable the interrupt
-    set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
-
-}
-
-/*turn down the brightness, and configure GPIO */
-void led_init() {
-  // Make sure people aren't blinded by LEDs connected here.
-  PWM0_REG(PWM_CMP0)  = 0xFE;
-  PWM0_REG(PWM_CMP1)  = 0xFF;
-  PWM0_REG(PWM_CMP2)  = 0xFF;
-  PWM0_REG(PWM_CMP3)  = 0xFF;
-  // Set up RGB LEDs for a visual.
-  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)
-{
-  //setup default global interrupt handler
-  for (int gisr = 0; gisr < PLIC_NUM_INTERRUPTS; gisr++){
-    g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS] = invalid_global_isr;
-  }
-  
-  print_instructions();
-  
-  led_init();
-  b0_irq_init();
-  b1_irq_init();
-
-  // Set up machine timer interrupt.
-  set_timer();
-
-  // Enable Global (PLIC) interrupts.
-  set_csr(mie, MIP_MEIP);
-  
-  // Enable all interrupts
-  set_csr(mstatus, MSTATUS_MIE);
-
-
-  while(1){
-    asm volatile ("wfi");
-  }
-  
-  return 0;
-
-}