From 8a492acf7b856f0ab13a531a77ba9e64097ba007 Mon Sep 17 00:00:00 2001
From: Fredrik Thulin <fredrik@thulin.net>
Date: Thu, 12 May 2016 19:46:38 +0200
Subject: Test both UARTs, and also test receiving data.

---
 projects/board-test/uart-test.c | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

(limited to 'projects')

diff --git a/projects/board-test/uart-test.c b/projects/board-test/uart-test.c
index f32fde7..6f022f4 100644
--- a/projects/board-test/uart-test.c
+++ b/projects/board-test/uart-test.c
@@ -1,8 +1,9 @@
 /*
  * Test code that just sends the letters 'a' to 'z' over and
- * over again using USART2.
+ * over again to both the USER and MGMT UARTs. If a CR is received,
+ * it will toggle upper/lower case of the letters being sent.
  *
- * Toggles the BLUE LED slowly and the RED LED for every
+ * Toggles the BLUE LED slowly and the GREEN LED for every
  * character sent.
  */
 #include "stm32f4xx_hal.h"
@@ -15,20 +16,36 @@
 int
 main()
 {
-  uint8_t c = 'a';
+  uint8_t tx = 'A';
+  uint8_t rx = 0;
+  uint8_t upper = 0;
 
   stm_init();
 
   while (1)
   {
-    HAL_GPIO_TogglePin(LED_PORT, LED_GREEN);
+    led_toggle(LED_GREEN);
 
-    uart_send_char(c);
+    uart_send_char2(STM_UART_USER, tx + upper);
+    uart_send_char2(STM_UART_MGMT, tx + upper);
     DELAY();
 
-    if (c++ == 'z') {
-      c = 'a';
-      HAL_GPIO_TogglePin(LED_PORT, LED_BLUE);
+    if (uart_recv_char2(STM_UART_USER, &rx, 0) == HAL_OK ||
+	uart_recv_char2(STM_UART_MGMT, &rx, 0) == HAL_OK) {
+        led_toggle(LED_YELLOW);
+        if (rx == '\r') {
+	  upper = upper == 0 ? ('a' - 'A'):0;
+	}
+    }
+
+    if (tx++ == 'Z') {
+      /* linefeed after each alphabet */
+      uart_send_char2(STM_UART_USER, '\r');
+      uart_send_char2(STM_UART_USER, '\n');
+      uart_send_char2(STM_UART_MGMT, '\r');
+      uart_send_char2(STM_UART_MGMT, '\n');
+      tx = 'A';
+      led_toggle(LED_BLUE);
     }
   }
 }
-- 
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