From 79d19fafff8d25297bbe8d8c4856ca088afbe7fd Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 6 Oct 2022 22:43:54 +0200
Subject: make *-led example a little bit more explicit

---
 serial-led/CMakeLists.txt |  2 +-
 serial-led/serial-led.c   |  8 +++++---
 usb-led/CMakeLists.txt    |  6 +-----
 usb-led/usb-led.c         | 16 ++++++++++------
 4 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/serial-led/CMakeLists.txt b/serial-led/CMakeLists.txt
index 8ebe9a7..db5b776 100644
--- a/serial-led/CMakeLists.txt
+++ b/serial-led/CMakeLists.txt
@@ -33,5 +33,5 @@ add_executable(serial-led
         serial-led.c
         )
 
-target_link_libraries(serial-led pico_stdlib)
+target_link_libraries(serial-led pico_stdlib pico_stdio_uart)
 pico_add_extra_outputs(serial-led)
diff --git a/serial-led/serial-led.c b/serial-led/serial-led.c
index 8f10f9c..1ade02e 100644
--- a/serial-led/serial-led.c
+++ b/serial-led/serial-led.c
@@ -30,16 +30,18 @@ void handle_cmd(uint8_t cmd)
   switch(cmd) {
   case '0': gpio_put(LED_PIN, 0); break;
   case '1': gpio_put(LED_PIN, 1); break;
-  default: printf("error\r\n"); return;
+  case 't': gpio_xor_mask(1<<LED_PIN); break;
+  default: printf("error\n"); return;
   }
-  printf("ok\r\n");
+  printf("ok\n");
 }
 
 int main()
 {
   gpio_init(LED_PIN);
   gpio_set_dir(LED_PIN, GPIO_OUT);
-  stdio_init_all();
+  stdio_uart_init_full(uart0, 9600, PICO_DEFAULT_UART_TX_PIN, PICO_DEFAULT_UART_RX_PIN);
+  stdio_set_translate_crlf(&stdio_uart, true);
 
   for(;;) {
     int cmd = getchar_timeout_us(100000);
diff --git a/usb-led/CMakeLists.txt b/usb-led/CMakeLists.txt
index 51a197b..e1d36ac 100644
--- a/usb-led/CMakeLists.txt
+++ b/usb-led/CMakeLists.txt
@@ -33,9 +33,5 @@ add_executable(usb-led
         usb-led.c
         )
 
-target_link_libraries(usb-led pico_stdlib)
-
-pico_enable_stdio_usb(usb-led 1)
-pico_enable_stdio_uart(usb-led 0)
-
+target_link_libraries(usb-led pico_stdlib pico_stdio_usb)
 pico_add_extra_outputs(usb-led)
diff --git a/usb-led/usb-led.c b/usb-led/usb-led.c
index 8f10f9c..faa3d1b 100644
--- a/usb-led/usb-led.c
+++ b/usb-led/usb-led.c
@@ -30,21 +30,25 @@ void handle_cmd(uint8_t cmd)
   switch(cmd) {
   case '0': gpio_put(LED_PIN, 0); break;
   case '1': gpio_put(LED_PIN, 1); break;
-  default: printf("error\r\n"); return;
+  case 't': gpio_xor_mask(1<<LED_PIN); break;
+  default: printf("error\n"); return;
   }
-  printf("ok\r\n");
+  printf("ok\n");
 }
 
 int main()
 {
   gpio_init(LED_PIN);
   gpio_set_dir(LED_PIN, GPIO_OUT);
-  stdio_init_all();
+  stdio_usb_init();
+  stdio_set_translate_crlf(&stdio_usb, true);
 
   for(;;) {
-    int cmd = getchar_timeout_us(100000);
-    if(cmd != PICO_ERROR_TIMEOUT) {
-      handle_cmd(cmd);
+    if(stdio_usb_connected()) {
+      int cmd = getchar_timeout_us(100000);
+      if(cmd != PICO_ERROR_TIMEOUT) {
+        handle_cmd(cmd);
+      }
     }
   }
 }
-- 
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