feat: add AXS15231B touch driver with coordinate parsing tests

1 files changed, 93 insertions, 0 deletions

diff --git a/tests/unit/test_touch.c b/tests/unit/test_touch.c
new file mode 100644
index 0000000..13f04b5
--- /dev/null
+++ b/tests/unit/test_touch.c
@@ -0,0 +1,93 @@
+#include "test_framework.h"
+#include "../../main/touch.h"
+#include <string.h>
+
+int main(void)
+{
+    touch_point_t pt;
+    uint8_t data[8];
+
+    printf("=== test_touch ===\n");
+
+    memset(data, 0, sizeof(data));
+    touch_parse_raw(data, &pt);
+    ASSERT(!pt.touched, "All-zero data = no touch");
+
+    data[0] = 1;
+    data[1] = 1;
+    data[2] = 0;
+    data[3] = 0;
+    touch_parse_raw(data, &pt);
+    ASSERT(!pt.touched, "data[0]=1 = no touch (gesture byte nonzero)");
+
+    data[0] = 0;
+    data[1] = 0;
+    touch_parse_raw(data, &pt);
+    ASSERT(!pt.touched, "data[1]=0 = no touch (touch count zero)");
+
+    data[0] = 0;
+    data[1] = 1;
+    data[2] = 0x00;
+    data[3] = 0x64;
+    data[4] = 0x00;
+    data[5] = 0xC8;
+    data[6] = 0;
+    data[7] = 0;
+    touch_parse_raw(data, &pt);
+    ASSERT(pt.touched, "Valid touch: touched=true");
+    ASSERT_EQ_INT(100, (int)pt.x, "Valid touch: x=100");
+    ASSERT_EQ_INT(200, (int)pt.y, "Valid touch: y=200");
+
+    data[0] = 0;
+    data[1] = 1;
+    data[2] = 0x0F;
+    data[3] = 0xFF;
+    data[4] = 0x0F;
+    data[5] = 0xFF;
+    touch_parse_raw(data, &pt);
+    ASSERT(pt.touched, "Max raw coords: touched=true");
+    ASSERT_EQ_INT(TOUCH_MAX_X, (int)pt.x, "Max raw coords clamped to 319");
+    ASSERT_EQ_INT(TOUCH_MAX_Y, (int)pt.y, "Max raw coords clamped to 479");
+
+    data[0] = 0;
+    data[1] = 1;
+    data[2] = 0x05;
+    data[3] = 0x00;
+    data[4] = 0x08;
+    data[5] = 0x00;
+    touch_parse_raw(data, &pt);
+    ASSERT(pt.touched, "12-bit coords: touched=true");
+    ASSERT_EQ_INT(TOUCH_MAX_X, (int)pt.x, "12-bit x: (0x05 << 8) | 0x00 = 1280, clamped to 319");
+
+    data[0] = 0;
+    data[1] = 2;
+    touch_parse_raw(data, &pt);
+    ASSERT(!pt.touched, "data[1]=2 = too many touches, reject");
+
+    touch_parse_raw(NULL, &pt);
+    ASSERT(!pt.touched, "NULL data = no touch");
+
+    data[0] = 0;
+    data[1] = 1;
+    data[2] = 0x00;
+    data[3] = 0x00;
+    data[4] = 0x00;
+    data[5] = 0x00;
+    touch_parse_raw(data, &pt);
+    ASSERT(pt.touched, "Origin (0,0): touched=true");
+    ASSERT_EQ_INT(0, (int)pt.x, "Origin: x=0");
+    ASSERT_EQ_INT(0, (int)pt.y, "Origin: y=0");
+
+    data[0] = 0;
+    data[1] = 1;
+    data[2] = 0x01;
+    data[3] = 0x3F;
+    data[4] = 0x01;
+    data[5] = 0xDF;
+    touch_parse_raw(data, &pt);
+    ASSERT(pt.touched, "Mid-screen: touched=true");
+    ASSERT_EQ_INT(319, (int)pt.x, "Mid-screen: x=0x13F=319");
+    ASSERT_EQ_INT(479, (int)pt.y, "Mid-screen: y=0x1DF=479");
+
+    TEST_SUMMARY();
+}