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Diffstat (limited to 'software/clic_vectored/clic_vectored.c')
| -rw-r--r-- | software/clic_vectored/clic_vectored.c | 197 |
1 files changed, 0 insertions, 197 deletions
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; - -} |