From 7bf718778b9710238d791cefc67ac9c8720985e2 Mon Sep 17 00:00:00 2001 From: Drew Barbier Date: Mon, 9 Jul 2018 21:19:05 -0700 Subject: remove non-vectored example --- software/clic_interrupts/Makefile | 8 -- software/clic_interrupts/clic.c | 231 -------------------------------------- 2 files changed, 239 deletions(-) delete mode 100644 software/clic_interrupts/Makefile delete mode 100644 software/clic_interrupts/clic.c (limited to 'software') diff --git a/software/clic_interrupts/Makefile b/software/clic_interrupts/Makefile deleted file mode 100644 index 502534d..0000000 --- a/software/clic_interrupts/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -TARGET = clic_interrupts -CFLAGS += -O2 -fno-builtin-printf -DUSE_CLIC -DUSE_LOCAL_ISR - -BSP_BASE = ../../bsp - -C_SRCS += clic.c - -include $(BSP_BASE)/env/common.mk diff --git a/software/clic_interrupts/clic.c b/software/clic_interrupts/clic.c deleted file mode 100644 index ccf98b2..0000000 --- a/software/clic_interrupts/clic.c +++ /dev/null @@ -1,231 +0,0 @@ -// See LICENSE for license details. - -#include -#include -#include "platform.h" -#include -#include "encoding.h" -#include -#include "sifive/devices/clic.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(); - -static void clic_enable(int offset) __attribute__((noinline)); -static void clic_enable(int offset) -{ - CLIC_REG8(CLIC_INTCFG + offset) = 0xff; - CLIC_REG8(CLIC_INTIE + offset) = 1; -} - -static void clic_disable(int offset) __attribute__((noinline)); -static void clic_disable(int offset) -{ - CLIC_REG8(CLIC_INTCFG + offset) = 0xff; - CLIC_REG8(CLIC_INTIE + offset) = 0; -} - -// 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(){ - clic_enable(IRQ_M_LOCAL + LOCAL_INT_SW_3); - clic_enable(IRQ_M_LOCAL + LOCAL_INT_BTN_0); - clic_enable(IRQ_M_LOCAL + LOCAL_INT_BTN_1); - clic_enable(IRQ_M_LOCAL + LOCAL_INT_BTN_2); - clic_enable(IRQ_M_LOCAL + LOCAL_INT_BTN_3); -} - -void disable_local_interrupts() { - clic_disable(IRQ_M_LOCAL + LOCAL_INT_SW_3); - clic_disable(IRQ_M_LOCAL + LOCAL_INT_BTN_0); - clic_disable(IRQ_M_LOCAL + LOCAL_INT_BTN_1); - clic_disable(IRQ_M_LOCAL + LOCAL_INT_BTN_2); - clic_disable(IRQ_M_LOCAL + LOCAL_INT_BTN_3); -} - -/*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 - CLIC_REG(CLIC_MSIP) = 0; -} - -/*Entry Point for Machine Timer Interrupt Handler*/ -void mti_isr(){ - const char mti_msg[] = " Timer interrupt, done debouncing.\n\n"; - write (STDOUT_FILENO, mti_msg, strlen(mti_msg)); - - // Disable the timer interrupt. The Debounce logic sets it. - clic_disable(IRQ_M_TIMER); - - // Enable all the local interrupts - enable_local_interrupts(); -} - -const char * instructions_msg = " \ -\n\ - SiFive, Inc\n\ - E21 Core IP Eval Kit 'clic_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 - clic_enable(IRQ_M_TIMER); -} - -// See bsp/env//init.c for how this -// interrupt vector is used. - -interrupt_function_ptr_t localISR[32]; - -static void unmapped_interrupt(void) { - printf("unmapped interrupt"); - asm volatile ("1: j 1b" ::: "memory"); -} - -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) - - // Unconfigure the CLIC before doing anything - for (int i = 0; i < 1024; ++i) - CLIC_REG8(CLIC_INTIE + i) = 0; - - // Write down the software interrupt pending bit, as we shouldn't start out - // by debouncing anything at all. - CLIC_REG(CLIC_MSIP) = 0; - - for (int isr = 0; isr < 32; isr++) - localISR[isr] = &unmapped_interrupt; - - 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; - - // Set up the CLIC interrupt mechanism - CLIC_REG(CLIC_CFG) = 4<<1; // nmBits=0; nlBits=4; nvBits=0 - - print_instructions(); - - enable_local_interrupts(); - - g_debouncing = 0; - - // Enable SW interrupts as well in this demo. - clic_enable(IRQ_M_SOFT); - - // Enable all global interrupts - set_csr(mstatus, MSTATUS_MIE); - - volatile int foo = 1; - while(foo){ - if (g_debouncing){ - //Trigger a SW interrupt - CLIC_REG(CLIC_MSIP) = 1; - g_debouncing = 0; - } - } - - return 0; - -} -- cgit v1.2.1-18-gbd029