Remove legacy examples

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

3 files changed, 0 insertions, 262 deletions

diff --git a/software/demo_gpio/.gitignore b/software/demo_gpio/.gitignore
deleted file mode 100644
index 35566c7..0000000
--- a/software/demo_gpio/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-demo_gpio
diff --git a/software/demo_gpio/Makefile b/software/demo_gpio/Makefile
deleted file mode 100644
index b181c5f..0000000
--- a/software/demo_gpio/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-TARGET = demo_gpio
-CFLAGS += -O2 -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME
-
-BSP_BASE = ../../bsp
-
-C_SRCS += demo_gpio.c
-C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/demo_gpio/demo_gpio.c b/software/demo_gpio/demo_gpio.c
deleted file mode 100644
index 8fe03e1..0000000
--- a/software/demo_gpio/demo_gpio.c
+++ /dev/null
@@ -1,252 +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;
-
-
-/*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);
-}
-
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-void handle_m_time_interrupt(){
-
-  clear_csr(mie, MIP_MTIP);
-
-  // Reset the timer for 3s in the future.
-  // This also clears the existing timer interrupt.
-
-  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 + 2 * RTC_FREQ;
-  *mtimecmp = then;
-
-  // read the current value of the LEDS and invert them.
-  uint32_t leds = GPIO_REG(GPIO_OUTPUT_VAL);
-
-  GPIO_REG(GPIO_OUTPUT_VAL) ^= ((0x1 << RED_LED_OFFSET)   |
-				(0x1 << GREEN_LED_OFFSET) |
-				(0x1 << BLUE_LED_OFFSET));
-  
-  // Re-enable the timer interrupt.
-  set_csr(mie, MIP_MTIP);
-
-}
-
-
-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\
-SiFive E-Series Software Development Kit 'demo_gpio' program.\n\
-Every 2 second, the Timer Interrupt will invert the LEDs.\n\
-(Arty Dev Kit Only): Press Buttons 0, 1, 2 to Set the LEDs.\n\
-Pin 19 (HiFive1) or A5 (Arty Dev Kit) is being bit-banged\n\
-for GPIO speed demonstration.\n\
-\n\
- ";
-
-void print_instructions() {
-
-  write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg));
-
-}
-
-#ifdef HAS_BOARD_BUTTONS
-void button_0_handler(void) {
-
-  // Red LED on
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << RED_LED_OFFSET);
-
-  // Clear the GPIO Pending interrupt by writing 1.
-  GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_0_OFFSET);
-
-};
-
-void button_1_handler(void) {
-
-  // Green LED On
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << GREEN_LED_OFFSET);
-
-  // Clear the GPIO Pending interrupt by writing 1.
-  GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_1_OFFSET);
-
-};
-
-
-void button_2_handler(void) {
-
-  // Blue LED On
-  GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << BLUE_LED_OFFSET);
-
-  GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_2_OFFSET);
-
-};
-#endif
-
-void reset_demo (){
-
-  // Disable the machine & timer interrupts until setup is done.
-
-  clear_csr(mie, MIP_MEIP);
-  clear_csr(mie, MIP_MTIP);
-
-  for (int ii = 0; ii < PLIC_NUM_INTERRUPTS; ii ++){
-    g_ext_interrupt_handlers[ii] = no_interrupt_handler;
-  }
-
-#ifdef HAS_BOARD_BUTTONS
-  g_ext_interrupt_handlers[INT_DEVICE_BUTTON_0] = button_0_handler;
-  g_ext_interrupt_handlers[INT_DEVICE_BUTTON_1] = button_1_handler;
-  g_ext_interrupt_handlers[INT_DEVICE_BUTTON_2] = button_2_handler;
-#endif
-
-  print_instructions();
-
-#ifdef HAS_BOARD_BUTTONS
-
-  // Have to enable the interrupt both at the GPIO level,
-  // and at the PLIC level.
-  PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_0);
-  PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_1);
-  PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_2);
-
-  // Priority must be set > 0 to trigger the interrupt.
-  PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_0, 1);
-  PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_1, 1);
-  PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_2, 1);
-
-  GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_0_OFFSET);
-  GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_1_OFFSET);
-  GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_2_OFFSET);
-
-#endif
-
-    // Set the machine timer to go off in 3 seconds.
-    // The
-    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 + 2*RTC_FREQ;
-    *mtimecmp = then;
-
-    // Enable the Machine-External bit in MIE
-    set_csr(mie, MIP_MEIP);
-
-    // Enable the Machine-Timer bit in MIE
-    set_csr(mie, MIP_MTIP);
-
-    // Enable interrupts in general.
-    set_csr(mstatus, MSTATUS_MIE);
-}
-
-int main(int argc, char **argv)
-{
-  // Set up the GPIOs such that the LED GPIO
-  // can be used as both Inputs and Outputs.
-  
-
-#ifdef HAS_BOARD_BUTTONS
-  GPIO_REG(GPIO_OUTPUT_EN)  &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET));
-  GPIO_REG(GPIO_PULLUP_EN)  &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET));
-  GPIO_REG(GPIO_INPUT_EN)   |=  ((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET));
-#endif
-
-  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 << BLUE_LED_OFFSET) ;
-  GPIO_REG(GPIO_OUTPUT_VAL)  &=  ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)) ;
-
-  
-  // For Bit-banging with Atomics demo.
-  
-  uint32_t bitbang_mask = 0;
-#ifdef _SIFIVE_HIFIVE1_H
-  bitbang_mask = (1 << PIN_19_OFFSET);
-#else
-#ifdef _SIFIVE_COREPLEXIP_ARTY_H
-  bitbang_mask = (0x1 << JA_0_OFFSET);
-#endif
-#endif
-
-  GPIO_REG(GPIO_OUTPUT_EN) |= bitbang_mask;
-  
-  /**************************************************************************
-   * Set up the PLIC
-   *
-   *************************************************************************/
-  PLIC_init(&g_plic,
-	    PLIC_CTRL_ADDR,
-	    PLIC_NUM_INTERRUPTS,
-	    PLIC_NUM_PRIORITIES);
-
-  reset_demo();
-
-  /**************************************************************************
-   * Demonstrate fast GPIO bit-banging.
-   * One can bang it faster than this if you know
-   * the entire OUTPUT_VAL that you want to write, but 
-   * Atomics give a quick way to control a single bit.
-   *************************************************************************/
-  // For Bit-banging with Atomics demo.
-  
-  while (1){
-    atomic_fetch_xor_explicit(&GPIO_REG(GPIO_OUTPUT_VAL), bitbang_mask, memory_order_relaxed);
-  }
-
-  return 0;
-
-}