stm: Make pendsv_nlr_jump work when debugging is enabled.

Stack layout is different when -g used, so need to handle the pendsv
jump differently.  Addresses Issue #315.

1 files changed, 2 insertions, 2 deletions

diff --git a/stm/led.c b/stm/led.c
index 683e82bc6..0e02715f4 100644
--- a/stm/led.c
+++ b/stm/led.c
@@ -103,8 +103,8 @@ void led_toggle(pyb_led_t led) {
             return;
     }
 
-    // XXX this assumes LED is driven by a low MCU output (true for PYBv3, false for PYBv4)
-    if (!(port->ODR & pin)) {
+    // XXX this assumes LED is driven by a high MCU output (false for PYBv3, true for PYBv4)
+    if (port->ODR & pin) {
         // turn LED off
         PYB_LED_OFF(port, pin);
     } else {