diff options
Diffstat (limited to 'software/coreip-welcome/coreip-welcome.c')
| -rw-r--r-- | software/coreip-welcome/coreip-welcome.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/software/coreip-welcome/coreip-welcome.c b/software/coreip-welcome/coreip-welcome.c new file mode 100644 index 0000000..7147d83 --- /dev/null +++ b/software/coreip-welcome/coreip-welcome.c @@ -0,0 +1,156 @@ + +#include <stdio.h> +#include <metal/cpu.h> +#include <metal/led.h> +#include <metal/button.h> +#include <metal/switch.h> + +#define RTC_FREQ 32768 + +struct metal_cpu *cpu0; +struct metal_interrupt *cpu_intr, *tmr_intr; +int tmr_id; +volatile uint32_t timer_isr_flag; + +void display_banner (void) { + + printf("\n"); + printf("\n"); + printf(" SIFIVE, INC.\n"); + printf("\n"); + printf(" 5555555555555555555555555\n"); + printf(" 5555 5555\n"); + printf(" 5555 5555\n"); + printf(" 5555 5555\n"); + printf(" 5555 5555555555555555555555\n"); + printf(" 5555 555555555555555555555555\n"); + printf(" 5555 5555\n"); + printf(" 5555 5555\n"); + printf(" 5555 5555\n"); + printf(" 5555555555555555555555555555 55555\n"); + printf(" 55555 555555555 55555\n"); + printf(" 55555 55555 55555\n"); + printf(" 55555 5 55555\n"); + printf(" 55555 55555\n"); + printf(" 55555 55555\n"); + printf(" 55555 55555\n"); + printf(" 55555 55555\n"); + printf(" 55555 55555\n"); + printf(" 555555555\n"); + printf(" 55555\n"); + printf(" 5\n"); + printf("\n"); + + printf("\n"); + printf("Welcome to the E31/E51 Core IP FPGA Evaluation Kit!\n"); + +} + +void timer_isr (int id, void *data) { + + // Disable Timer interrupt + metal_interrupt_disable(tmr_intr, tmr_id); + + // Flag showing we hit timer isr + timer_isr_flag = 1; +} + +void wait_for_timer(struct metal_led *which_led) { + + // clear global timer isr flag + timer_isr_flag = 0; + + // Turn on desired LED + metal_led_on(which_led); + + // Set timer + metal_cpu_set_mtimecmp(cpu0, metal_cpu_get_mtime(cpu0) + RTC_FREQ); + + // Enable Timer interrupt + metal_interrupt_enable(tmr_intr, tmr_id); + + // wait till timer triggers and isr is hit + while (timer_isr_flag == 0){}; + + timer_isr_flag = 0; + + // All Off + metal_led_off(which_led); +} + +int main (void) +{ + int rc, up_cnt, dn_cnt; + struct metal_led *led0_red, *led0_green, *led0_blue; + + // This demo will toggle LEDs colors so we define them here + led0_red = metal_led_get_rgb("LD0", "red"); + led0_green = metal_led_get_rgb("LD0", "green"); + led0_blue = metal_led_get_rgb("LD0", "blue"); + if ((led0_red == NULL) || (led0_green == NULL) || (led0_blue == NULL)) { + printf("At least one of LEDs is null.\n"); + return 1; + } + + // Enable each LED + metal_led_enable(led0_red); + metal_led_enable(led0_green); + metal_led_enable(led0_blue); + + // All Off + metal_led_off(led0_red); + metal_led_off(led0_green); + metal_led_off(led0_blue); + + // Lets get the CPU and and its interrupt + cpu0 = metal_cpu_get(0); + if (cpu0 == NULL) { + printf("CPU null.\n"); + return 2; + } + cpu_intr = metal_cpu_interrupt_controller(cpu0); + if (cpu_intr == NULL) { + printf("CPU interrupt controller is null.\n"); + return 3; + } + metal_interrupt_init(cpu_intr); + + // display welcome banner + display_banner(); + + // Setup Timer and its interrupt so we can toggle LEDs on 1s cadence + tmr_intr = metal_cpu_timer_interrupt_controller(cpu0); + if (tmr_intr == NULL) { + printf("TIMER interrupt controller is null.\n"); + return 4; + } + metal_interrupt_init(tmr_intr); + tmr_id = metal_cpu_timer_get_interrupt_id(cpu0); + rc = metal_interrupt_register_handler(tmr_intr, tmr_id, timer_isr, cpu0); + if (rc < 0) { + printf("TIMER interrupt handler registration failed\n"); + return (rc * -1); + } + + // Lastly CPU interrupt + if (metal_interrupt_enable(cpu_intr, 0) == -1) { + printf("CPU interrupt enable failed\n"); + return 6; + } + + // Red -> Green -> Blue, repeat + while (1) { + + // Turn on RED + wait_for_timer(led0_red); + + // Turn on Green + wait_for_timer(led0_green); + + // Turn on Blue + wait_for_timer(led0_blue); + } + + // return + return 0; +} |