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-rw-r--r--software/watchdog/.gitignore1
-rw-r--r--software/watchdog/.unsupported-boards1
-rw-r--r--software/watchdog/Makefile9
-rw-r--r--software/watchdog/watchdog.c221
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;
-
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 13:02:08 +0000