Delay FMC startup to not upset the Novena at boot.

For some unknown reason, Novenas seems to not boot unless the
initialization of the FMC interface is delayed for a little while.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/fmc-test/src/main.c b/src/fmc-test/src/main.c
index 872c182..69c5bb0 100644
--- a/src/fmc-test/src/main.c
+++ b/src/fmc-test/src/main.c
@@ -58,6 +58,7 @@ int test_fpga_address_bus(void);
 int main(void)
 //------------------------------------------------------------------------------
 {
+  int i;
 		// initialize hal
   HAL_Init();
 
@@ -67,6 +68,13 @@ int main(void)
 		// initialize gpio
 	MX_GPIO_Init();
 
+		// Blink blue LED for six seconds to not upset the Novena at boot.
+	led_on(GPIO_PIN_LED_BLUE);
+	for (i = 0; i < 12; i++) {
+		HAL_Delay(500);
+		led_toggle(GPIO_PIN_LED_BLUE);
+	}
+
 		// initialize rng
 	MX_RNG_Init();