diff --git a/Source/error.c b/Source/error.c
new file mode 100644
--- /dev/null
+++ b/Source/error.c
@@ -0,0 +1,80 @@
+//
+// Error: Provides a simple interface for asserting and checking errors
+//
+
+#include "error.h"
+#include "stm32f0xx_hal.h"
+
+#include <stdio.h>
+
+
+volatile uint32_t err_reg;
+volatile uint8_t num_errors_asserted = 0;
+
+// Moderately detailed messages corresponding to each error enum
+char *  error_message[] =
+{
+		"RS485 parse fail",
+};
+
+// Set the passed error flag
+void error_assert(uint8_t errno)
+{
+	// Errno invalid: exceeds bit length of error register
+	if(errno >= 32)
+		return;
+
+	// Set error flag
+	err_reg |= (1<<errno);
+
+	// Count how many errors have occurred
+	num_errors_asserted++;
+
+	// Dispatch error message over IRdA and/or debug port
+#ifdef DEBUG_ERROUT_ENABLE
+	char outbuf[256];
+	snprintf(outbuf, 256, "Error: %s (no details)\r\n", error_message[errno]);
+	usb_send(outbuf);
+	ir_efs_send(outbuf);
+#endif
+}
+
+// Set the passed error flag with details about the error
+void error_assert_info(uint8_t errno, char* details)
+{
+	// Errno invalid: exceeds bit length of error register
+	if(errno >= 32)
+		return;
+
+	// Set error flag
+	err_reg |= (1<<errno);
+
+	// Count how many errors have occurred
+	num_errors_asserted++;
+
+	// Dispatch error message over IRdA and/or debug port
+#ifdef DEBUG_ERROUT_ENABLE
+	char outbuf[256];
+	snprintf(outbuf, 256, "Error: %s (%s)\r\n", error_message[errno], details);
+	usb_send(outbuf);
+	ir_efs_send(outbuf);
+#endif
+}
+
+// Check if the passed error flag has been asserted
+uint8_t error_check(uint8_t errno)
+{
+	return (err_reg & (1<<errno)) > 0;
+}
+
+// Return 1 if any error has occurred
+uint8_t error_occurred(void)
+{
+	return err_reg > 0;
+}
+
+// Return the number of errors that have occurred
+uint8_t error_count(void)
+{
+	return num_errors_asserted;
+}