1 files changed, 32 insertions, 0 deletions
diff --git a/src/uart-test/main.c b/src/uart-test/main.c
new file mode 100644
index 0000000..77c17f4
--- /dev/null
+++ b/src/uart-test/main.c
@@ -0,0 +1,32 @@
+/*
+ * Test code that just sends the letters 'a' to 'z' over and
+ * over again using USART1.
+ *
+ * Toggles the BLUE LED slowly and the YELLOW LED for every
+ * character sent.
+ */
+#include "stm_init.h"
+
+#define DELAY() HAL_Delay(250)
+
+int
+main()
+{
+  uint8_t c = 'a';
+  uint32_t i = 0;
+
+  stm_init();
+
+  while (1)
+  {
+    HAL_GPIO_TogglePin(LED_PORT, LED_YELLOW);
+
+    HAL_UART_Transmit(&huart1, (uint8_t *) &c, 1, 0xff);
+    DELAY();
+
+    if (c++ == 'z') {
+      c = 'a';
+      HAL_GPIO_TogglePin(LED_PORT, LED_BLUE);
+    }
+  }
+}