From e7baf2e96f1cec2071cb2e1e6a4735c36611bc26 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Thu, 2 Oct 2025 17:13:22 -0400
Subject: dac fw module

---
 fw/tests/system/dac_systest.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 fw/tests/system/dac_systest.c

(limited to 'fw/tests/system/dac_systest.c')

diff --git a/fw/tests/system/dac_systest.c b/fw/tests/system/dac_systest.c
new file mode 100644
index 0000000..8653f96
--- /dev/null
+++ b/fw/tests/system/dac_systest.c
@@ -0,0 +1,37 @@
+#include <xc.h>
+
+#include <stdint.h>
+
+#include "system.h"
+#include "types.h"
+#include "spi.h"
+#include "dac.h"
+
+void
+main(void) {
+	sysInit();
+	spiInit();
+	dacInit();
+
+	dacSet1a((U16){0u, 252u}); // 1.23V
+
+	for (;;) {
+
+	}
+}
+
+void
+__interrupt() isr(void) {
+	static U8 ctr = 0u;
+	static U16 level = {0, 0};
+
+	if (TMR1IF) {
+		ctr++;
+		if (ctr == 23u) { // 1s period
+			ctr = 0u;
+			dacSet1a(level);
+			addU16(&level, 50u);
+		}
+		TMR1IF = 0;
+	}
+}
-- 
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