Use ROM_ function to get approximately correct timing

example_standalone_driverlib/main.c

@@ -11,11 +11,13 @@
  *
  */
 
+#define TARGET_IS_TM4C129_RA2
 #include <stdbool.h> /*driverlib header requires stdbool.h to be included a first header file before any driverlib header*/
 #include <stdint.h>
 #include <driverlib/gpio.h>
 #include <driverlib/pin_map.h>/*supplies GPIO_PIN_x*/
 #include <driverlib/sysctl.h>
+#include <driverlib/rom.h>
 #include <inc/hw_memmap.h>/*supplies GPIO_PORTx_BASE*/
 
 /*Controller is initially clocked with 16MHz*/
@@ -44,15 +46,6 @@ void main (void) {
         /*write value of val to pin 1 of port n*/
         GPIOPinWrite (GPIO_PORTN_BASE, GPIO_PIN_1, ui8val);
         // for(ui32Loop = 0; ui32Loop < 400000; ui32Loop++){}
-        SysCtlDelay(F_CPU/6);  //approx 0,5 s
-
+        ROM_SysCtlDelay(F_CPU/2/3);  //approx 0,5 s
     }
-
-
 }
-
-
-
-
-
-

[Matthias Wenzl]

Warum hast du die ROM_ Funktion eingeführt? Die Idee der ROM Vermeidung war ja gerade zu zeigen das Delayfunktionen kein präzises Timing ermöglichen.