coreplexip-welcome example updated using freedom metal

3 files changed, 162 insertions, 0 deletions

diff --git a/software/coreplexip-welcome/Makefile b/software/coreplexip-welcome/Makefile
new file mode 100644
index 0000000..f9c9ead
--- /dev/null
+++ b/software/coreplexip-welcome/Makefile
@@ -0,0 +1,4 @@
+coreplexip-welcome: coreplexip-welcome.c
+
+clean:
+	rm -f coreplexip-welcome coreplexip-welcome.hex
diff --git a/software/coreplexip-welcome/README.md b/software/coreplexip-welcome/README.md
new file mode 100644
index 0000000..5ea36ef
--- /dev/null
+++ b/software/coreplexip-welcome/README.md
@@ -0,0 +1,2 @@
+# coreplexip-welcome
+A simple "CoreplexIP Welcome" example which prints SiFive banner and uses board LEDs.
diff --git a/software/coreplexip-welcome/coreplexip-welcome.c b/software/coreplexip-welcome/coreplexip-welcome.c
new file mode 100644
index 0000000..a975b1c
--- /dev/null
+++ b/software/coreplexip-welcome/coreplexip-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 Coreplex 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;
+}