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authorNathaniel Graff <nathaniel.graff@sifive.com>2019-03-07 21:32:52 +0000
committerGitHub <noreply@github.com>2019-03-07 21:32:52 +0000
commit7b036c07e40a6f3d3cf1ddfc5d88d3a36beb4e46 (patch)
treec1459952c20e4534d33016d4fc2cf6729228c0e6 /software/local_interrupts
parent84781219c87c0b9148e318f3e358ef7de03e251c (diff)
parentdef12d50a686774196c613a819e6afb744ee290e (diff)
Merge pull request #195 from sifive/remove-legacy
Remove legacy BSPs and Software
Diffstat (limited to 'software/local_interrupts')
-rw-r--r--software/local_interrupts/.unsupported-boards2
-rw-r--r--software/local_interrupts/Makefile8
-rw-r--r--software/local_interrupts/local_interrupts.c216
3 files changed, 0 insertions, 226 deletions
diff --git a/software/local_interrupts/.unsupported-boards b/software/local_interrupts/.unsupported-boards
deleted file mode 100644
index 33cea3a..0000000
--- a/software/local_interrupts/.unsupported-boards
+++ /dev/null
@@ -1,2 +0,0 @@
-freedom-e300-arty
-freedom-e300-hifive1
diff --git a/software/local_interrupts/Makefile b/software/local_interrupts/Makefile
deleted file mode 100644
index 4605ee9..0000000
--- a/software/local_interrupts/Makefile
+++ /dev/null
@@ -1,8 +0,0 @@
-TARGET = local_interrupts
-CFLAGS += -O2 -fno-builtin-printf -DUSE_LOCAL_ISR
-
-BSP_BASE = ../../bsp
-
-C_SRCS += local_interrupts.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/local_interrupts/local_interrupts.c b/software/local_interrupts/local_interrupts.c
deleted file mode 100644
index cc9bfe7..0000000
--- a/software/local_interrupts/local_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 "encoding.h"
-#include <unistd.h>
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'local_interrupts' demo only supported for Coreplex IP Eval Kits
-#endif
-
-// Global Variable used to show
-// software interrupts.
-volatile uint32_t g_debouncing;
-
-void debounce();
-
-// Structures for registering different interrupt handlers
-// for different parts of the application.
-typedef void (*interrupt_function_ptr_t) (void);
-
-// This function enables some of the local interrupts sources
-// used in this demo -- just those for the buttons and
-// Switch 3.
-
-void enable_local_interrupts(){
-
- // lowest priority
- set_csr(mie, MIP_MLIP(LOCAL_INT_SW_3 ));
- set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_0));
- set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
- set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_2));
- set_csr(mie, MIP_MLIP(LOCAL_INT_BTN_3));
- // highest priority
-
-}
-
-void disable_local_interrupts() {
-
- // lowest priority
- clear_csr(mie, MIP_MLIP(LOCAL_INT_SW_3 ));
- clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_0));
- clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_1));
- clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_2));
- clear_csr(mie, MIP_MLIP(LOCAL_INT_BTN_3));
- // highest priority
-
-}
-
-/*Entry Point for Machine Software Interrupt Handler*/
-void msi_isr() {
-
- const char msi_msg[] = " Debouncing: (this message due to Software Interrupt))\n\n";
- write (STDOUT_FILENO, msi_msg, strlen(msi_msg));
-
- //clear the SW interrupt
- CLINT_REG(CLINT_MSIP) = 0;
-
-}
-
-/*Entry Point for Machine Timer Interrupt Handler*/
-void mti_isr(){
-
- // Disable the timer interrupt. The Debounce logic sets it.
- clear_csr(mie, MIP_MTIP);
-
- // Enable all the local interrupts
- enable_local_interrupts();
-}
-
-
-const char * instructions_msg = " \
-\n\
- SiFive, Inc\n\
- E31/E51 Coreplex IP Eval Kit 'local_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));
-
-}
-
-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);
- debounce();
-};
-
-void button_1_isr(void) {
-
- // Toggle Green LED
- const char button_1_msg[] = "Button 1 was pressed. Toggle Green.\n";
- write (STDOUT_FILENO, button_1_msg, strlen(button_1_msg));
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << GREEN_LED_OFFSET);
- debounce();
-};
-
-
-void button_2_isr(void) {
-
- // Toggle Blue LED
- const char button_2_msg[] = "Button 2 was pressed. Toggle Blue.\n";
- write (STDOUT_FILENO, button_2_msg, strlen(button_2_msg));
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << BLUE_LED_OFFSET);
- debounce();
-
-};
-
-void button_3_isr(void) {
- const char button_3_msg[] = "Button 3 was pressed! (No LEDs change).\n";
- write (STDOUT_FILENO, button_3_msg, strlen(button_3_msg));
- debounce();
-}
-
-void switch_3_isr(void) {
- const char sw_3_msg[] = "Switch 3 is on! But buttons have higher priority.\n";
- write (STDOUT_FILENO, sw_3_msg, strlen(sw_3_msg));
- debounce();
-}
-
-void debounce(int local_interrupt_num) {
-
- // Disable the most recent interrupt.
- // Don't enable it again until the timer goes off,
- // in .5 second.
-
- // Set the machine timer to go off in .5 seconds.
- // If the timer was already set to go off, this "cancels"
- // the current one.
-
- 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 + .5*RTC_FREQ;
- *mtimecmp = then;
-
- disable_local_interrupts();
- g_debouncing = 1;
-
- // Enable the Machine-Timer bit in MIE
- set_csr(mie, MIP_MTIP);
-
-}
-
-// See bsp/env/<BOARD>/init.c for how this
-// interrupt vector is used.
-
-interrupt_function_ptr_t localISR[32];
-
-int main(int argc, char **argv)
-{
-
- // 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 << BLUE_LED_OFFSET) ;
- GPIO_REG(GPIO_OUTPUT_VAL) &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)) ;
-
- // The Buttons and Switches which are used as local interrupt sources
- // do not go through the GPIO peripheral, so they do not need to
- // be configured as inputs.
-
- // Disable the timer & local interrupts until setup is done (they're
- // not reset by default)
-
- // Disable all interrupts. MIE is not reset.
- write_csr(mie, 0);
-
- for (int isr = 0; isr < 32; isr++){
- localISR[isr] = 0;
- }
-
- localISR[IRQ_M_SOFT] = msi_isr;
- localISR[IRQ_M_TIMER] = mti_isr;
- localISR[IRQ_M_LOCAL + LOCAL_INT_SW_3] = switch_3_isr;
- localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_0] = button_0_isr;
- localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_1] = button_1_isr;
- localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_2] = button_2_isr;
- localISR[IRQ_M_LOCAL + LOCAL_INT_BTN_3] = button_3_isr;
-
- print_instructions();
-
- enable_local_interrupts();
-
- g_debouncing = 0;
-
- // Enable SW interrupts as well in this demo.
- set_csr(mie, MIP_MSIP);
-
- // Enable all global interrupts
- set_csr(mstatus, MSTATUS_MIE);
-
- volatile int foo = 1;
- while(foo){
- if (g_debouncing){
- //Trigger a SW interrupt
- CLINT_REG(CLINT_MSIP) = 1;
- g_debouncing = 0;
- }
- }
-
- return 0;
-
-}