watch library: implement UART

watch-library/simulator/watch/watch_uart.c

@@ -22,37 +22,30 @@
  * SOFTWARE.
  */
 
- /*
- * UART methods are Copyright (c) 2014-2017, Alex Taradov <alex@taradov.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
 #include "watch_uart.h"
 #include "peripheral_clk_config.h"
 
+static bool tx_enable = false;
+static bool rx_enable = false;
+
+void watch_enable_uart(const uint8_t tx_pin, const uint8_t rx_pin, uint32_t baud) {
+    tx_enable = !!tx_pin;
+    rx_enable = !!rx_pin;
+}
+
+void watch_uart_puts(char *s) {
+	if (tx_enable) {
+        // TODO: hook up to UI
+    }
+}
+
+char watch_uart_getc(void) {
+	if (rx_enable) {
+        // TODO: hook up to UI
+    }
+    return 0;
+}
+
 void watch_enable_debug_uart(uint32_t baud) {}
 
 void watch_debug_putc(char c) {}