Remove legacy examples

Signed-off-by: Nathaniel Graff <nathaniel.graff@sifive.com>

4 files changed, 0 insertions, 232 deletions

diff --git a/software/watchdog/.gitignore b/software/watchdog/.gitignore
deleted file mode 100644
index 35566c7..0000000
--- a/software/watchdog/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-demo_gpio
diff --git a/software/watchdog/.unsupported-boards b/software/watchdog/.unsupported-boards
deleted file mode 100644
index 1e65df5..0000000
--- a/software/watchdog/.unsupported-boards
+++ /dev/null
@@ -1 +0,0 @@
-coreplexip-e51-arty
diff --git a/software/watchdog/Makefile b/software/watchdog/Makefile
deleted file mode 100644
index f614a4e..0000000
--- a/software/watchdog/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-TARGET = watchdog
-CFLAGS += -O2 -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME
-
-BSP_BASE = ../../bsp
-
-C_SRCS += watchdog.c
-C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/watchdog/watchdog.c b/software/watchdog/watchdog.c
deleted file mode 100644
index 672ed68..0000000
--- a/software/watchdog/watchdog.c
+++ /dev/null
@@ -1,221 +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>
-#include "stdatomic.h"
-
-void reset_demo (void);
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*function_ptr_t) (void);
-void no_interrupt_handler (void) {};
-function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS];
-
-
-// Instance data for the PLIC.
-plic_instance_t g_plic;
-
-
-/**
-* use mtime to wait for a specified number of ticks.
-* async determins if this is a busy wait, or if
-* an irq is scheduled
-*/
-void mtime_wait( uint64_t ticks, uint32_t async)
-{
-
-    volatile uint64_t * mtime  = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
-    uint64_t now = *mtime;
-    
-    //if async, schedule irq
-    if(async) {
-      volatile uint64_t * mtimecmp = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP);
-      uint64_t then = now + ticks; 
-      *mtimecmp = then;
-      set_csr(mie, MIP_MTIP);
-
-    } else  {
-      //else busy wait
-      uint64_t then = now + ticks;
-      while(*mtime<then) {}
-
-    }
-
-}
-
-/*Entry Point for PLIC Interrupt Handler*/
-void handle_m_ext_interrupt(){
-  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);
-}
-
-//global countdown timer
-static uint32_t countdown = 10;
-/*Entry Point for Machine Timer Interrupt Handler*/
-void handle_m_time_interrupt(){
-
-  //cleare the timer irq
-  clear_csr(mie, MIP_MTIP);
-
-  //schedule next timer irq for 1 second
-  mtime_wait(1*RTC_FREQ, 1);
-
-  //flash a led
-  GPIO_REG(GPIO_OUTPUT_VAL) ^=	(0x1 << BLUE_LED_OFFSET);
-  
-  //print the count
-  printf("watchdog reset in %d\n", countdown--);
-}
-
-
-const char * instructions_msg = " \
-\n\
-                SIFIVE, INC.\n\
-\n\
-         5555555555555555555555555\n\
-        5555                   5555\n\
-       5555                     5555\n\
-      5555                       5555\n\
-     5555       5555555555555555555555\n\
-    5555       555555555555555555555555\n\
-   5555                             5555\n\
-  5555                               5555\n\
- 5555                                 5555\n\
-5555555555555555555555555555          55555\n\
- 55555           555555555           55555\n\
-   55555           55555           55555\n\
-     55555           5           55555\n\
-       55555                   55555\n\
-         55555               55555\n\
-           55555           55555\n\
-             55555       55555\n\
-               55555   55555\n\
-                 555555555\n\
-                   55555\n\
-                     5\n\
-\n\
-This application demonstrates the functionality of\n\
-the watchdog timer present in the HiFive1 AON peripheral.\n\
-\n\
-The Watchdog timer will expire in 10 seconds resulting in\n\
-a software reset.\n\
-\n\
-Press a key to prevent a reset\n\
-";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-
-/**
-* Flash the red led for a second, then set up
-* blue for blinking during mtime irq
-*/
-void led_init() {
-
-
-  // Set up the GPIOs such that the LED GPIO
-  // can be used as both Inputs and 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));
-
-  //flash red led to indicate reset
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=   ~(0x1 << RED_LED_OFFSET) ;
-  mtime_wait(1*RTC_FREQ,0);
-  GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1 << RED_LED_OFFSET) ;
-}
-
-/**
-* initialize the watchdog to reset in
-* 5 seconds
-**/
-void watchdog_init()  {
-
-
-//reset in 10 seconds
-AON_REG(AON_WDOGKEY) = AON_WDOGKEY_VALUE;
-AON_REG(AON_WDOGCMP) = 11;
-//wdogconfig: : wdogrsten | enablealways | reset to 0 | max scale
-AON_REG(AON_WDOGKEY) = AON_WDOGKEY_VALUE;
-AON_REG(AON_WDOGCFG) |= (AON_WDOGCFG_RSTEN | AON_WDOGCFG_ENALWAYS |\
-                        AON_WDOGCFG_ZEROCMP | AON_WDOGCFG_SCALE) ;
-
-}
-
-void reset_demo ()  {
-
-  // Disable the machine & timer interrupts until setup is done.
-  clear_csr(mie, MIP_MEIP);
-  clear_csr(mie, MIP_MTIP);
-
-  //enable uart input
-  UART0_REG(UART_REG_RXCTRL) = UART_RXEN;
-
-  /**************************************************************************
-   * Set up the PLIC
-   *************************************************************************/
-  PLIC_init(&g_plic,
-	    PLIC_CTRL_ADDR,
-	    PLIC_NUM_INTERRUPTS,
-	    PLIC_NUM_PRIORITIES);
-
-  for (int ii = 0; ii < PLIC_NUM_INTERRUPTS; ii ++){
-    g_ext_interrupt_handlers[ii] = no_interrupt_handler;
-  }
-
-
-  led_init();
-  print_instructions();
-  watchdog_init();
-  
-  // Enable the Machine-External bit in MIE
-  set_csr(mie, MIP_MEIP);
-  // Enable interrupts in general.
-  set_csr(mstatus, MSTATUS_MIE);
-}
-
-int main(int argc, char **argv)
-{
-
-  reset_demo();
-  //schedule a 1 second timer 
-  mtime_wait(1*RTC_FREQ,1);
-
- 
-  while (1){
-    char c;
-    if(((int32_t) UART0_REG(UART_REG_RXFIFO)) > 0){
-        //flash green led to indicate Kick
-        GPIO_REG(GPIO_OUTPUT_VAL)  &=   ~(0x1 << GREEN_LED_OFFSET) ;  
-
-        printf("Feeding Watchdog.\nHiFive1 will reset in 10 seconds.\n");
-        countdown = 10;
-        AON_REG(AON_WDOGKEY) = AON_WDOGKEY_VALUE;
-        AON_REG(AON_WDOGFEED) = AON_WDOGFEED_VALUE;
-
-        //busy wait a bit so the user sees the led blink
-        mtime_wait(5000, 0);
-        //turn off led
-        GPIO_REG(GPIO_OUTPUT_VAL)  |=   (0x1 << GREEN_LED_OFFSET) ;
-    }
-  }
-
-  return 0;
-
-}