summaryrefslogtreecommitdiff
path: root/software/clic_vectored
diff options
context:
space:
mode:
Diffstat (limited to 'software/clic_vectored')
-rw-r--r--software/clic_vectored/Makefile10
-rw-r--r--software/clic_vectored/clic_vectored.c197
2 files changed, 0 insertions, 207 deletions
diff --git a/software/clic_vectored/Makefile b/software/clic_vectored/Makefile
deleted file mode 100644
index d6e2342..0000000
--- a/software/clic_vectored/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-TARGET = clic_vectored
-CFLAGS += -Og -fno-builtin-printf
-
-BSP_BASE = ../../bsp
-
-C_SRCS += clic_vectored.c
-
-C_SRCS += $(BSP_BASE)/drivers/clic/clic_driver.c
-
-include $(BSP_BASE)/env/common.mk
diff --git a/software/clic_vectored/clic_vectored.c b/software/clic_vectored/clic_vectored.c
deleted file mode 100644
index 37ea723..0000000
--- a/software/clic_vectored/clic_vectored.c
+++ /dev/null
@@ -1,197 +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>
-#include "sifive/devices/clic.h"
-#include "clic/clic_driver.h"
-#include "sifive/devices/clint.h"
-
-#ifndef _SIFIVE_COREPLEXIP_ARTY_H
-#error 'local_interrupts' demo only supported for Core IP Eval Kits
-#endif
-
-// Global Variable used to show
-// software interrupts.
-volatile uint32_t g_debouncing;
-
-// vector table defined in init.c
-typedef void (*interrupt_function_ptr_t) (void);
-extern interrupt_function_ptr_t localISR[CLIC_NUM_INTERRUPTS];
-extern void default_handler(void);
-
-//clic data structure
-clic_instance_t clic;
-
-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\
-E2 Core IP Eval Kit 'clic_vectored' demo.\n\
-This demo uses buttons 0, 1, and 2 on the\n\
-Arty board to trigger vectored clic interrupts.\n\
-The higher the button number, the higher the\n\
-interupt priority. Button 0's handler runs for\n\
-10 seconds, button 1's for 5, and button 2's for 1.\n\
-Preemption is enabled so that higher priority\n\
-interrupts can be triggered while in low priority\n\
-handlers. The demo also uses the CLIC's software\n\
-interrupt to pend a lower priority interrupt from\n\
-button 2's handler.\n\
-\n\
-Note the buttons are wired directly into the local\n\
-interrupts, so a given interrupt will stay asserted\n\
-as long as the button is being pushed.\n\
-\n\
-This demo works for both the E20 and E21 FPGA\n\
-as long as CLIC_CONFIG_BITS matches the desired\n\
-core.\n\
-\n";
-
-void print_instructions() {
- write (STDERR_FILENO, instructions_msg, strlen(instructions_msg));
-}
-
-
-//busy wait for the specified time
-void wait_ms(uint64_t ms) {
- static const uint64_t ms_tick = RTC_FREQ/1000;
- volatile uint64_t * mtime = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME);
- uint64_t then = (ms_tick * ms) + *mtime;
- while(*mtime<then);
-}
-
-void button_0_isr(void) __attribute__((interrupt("SiFive-CLIC-preemptible")));
-void button_0_isr(void) {
- // Toggle Red LED
- uint8_t level = clic_get_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
- printf("Button 0 was pressed, interrupt level %d. Toggle Red.\n", level);
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << RED_LED_OFFSET);
- wait_ms(10000);
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << RED_LED_OFFSET);
-}
-
-void button_0_setup(void) {
- clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0), button_0_isr);
- clic_set_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0), 1);
- clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_0));
-}
-
-void button_1_isr(void) __attribute__((interrupt("SiFive-CLIC-preemptible")));
-void button_1_isr(void) {
- // Toggle Red LED
- uint8_t level = clic_get_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1));
- printf("Button 1 was pressed, interrupt level %d. Toggle Blue.\n", level);
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << BLUE_LED_OFFSET);
- wait_ms(5000);
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << BLUE_LED_OFFSET);
-}
-
-void button_1_setup(void) {
- clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1), button_1_isr);
- clic_set_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1), 2);
- clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_1));
-}
-
-void button_2_isr(void) __attribute__((interrupt("SiFive-CLIC-preemptible")));
-void button_2_isr(void) {
- // Toggle Red LED
- uint8_t level = clic_get_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2));
- printf("Button 2 was pressed, interrupt level %d. Pending CSIPID and toggle Green.\n", level);
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << GREEN_LED_OFFSET);
- //pend a software interrupt
- clic_set_pending(&clic, CSIPID);
- wait_ms(1000);
- GPIO_REG(GPIO_OUTPUT_VAL) = GPIO_REG(GPIO_OUTPUT_VAL) ^ (0x1 << GREEN_LED_OFFSET);
-}
-
-void button_2_setup(void) {
- clic_install_handler(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2), button_2_isr);
- clic_set_int_level(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2), 3);
- clic_enable_interrupt(&clic, (LOCALINTIDBASE + LOCAL_INT_BTN_2));
-}
-
-/*Entry Point for Machine Software Interrupt Handler*/
-uint32_t COUNT;
-void csip_isr()__attribute((interrupt));
-void csip_isr() {
- //clear the SW interrupt
- CLIC0_REG8(CLIC_INTIP + CSIPID) = 0;
- COUNT++;
-}
-
-void csip_setup(void) {
- clic_install_handler(&clic, CSIPID, csip_isr);
- clic_set_int_level(&clic, CSIPID, 1);
- clic_enable_interrupt(&clic, CSIPID);
-}
-
-void config_gpio() {
- // 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<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)| (0x1 << BLUE_LED_OFFSET)) ;
-}
-
-int main(int argc, char **argv)
-{
- clear_csr(mstatus, MSTATUS_MIE);
- clear_csr(mie, IRQ_M_SOFT);
- clear_csr(mie, IRQ_M_TIMER);
-
- //initialize clic registers and vector table
- clic_init(&clic, CLIC_HART0_ADDR,
- (interrupt_function_ptr_t*)localISR,
- default_handler,
- CLIC_NUM_INTERRUPTS,
- CLIC_CONFIG_BITS);
-
- //use all 4 config bits for levels, no shv
- clic_set_cliccfg(&clic, (CLIC_CONFIG_BITS<<1));
-
- //initialize gpio and buttons.
- //each button registers an interrupt handler
- config_gpio();
- button_0_setup();
- button_1_setup();
- button_2_setup();
- csip_setup();
-
- // Enable all global interrupts
- set_csr(mstatus, MSTATUS_MIE);
- print_instructions();
-
- while(1) {
- wait_ms(10000);
- printf("Count=%d\n", COUNT);
- //Trigger a SW interrupt
- clic_set_pending(&clic, CSIPID);
- }
-
- return 0;
-
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 11:16:27 +0000