Fix volatile variable access in at91sam7s port example.

2015-01-30 20:54:48 +00:00
parent c2533b6ead
commit dd271af2ed
3 changed files with 13 additions and 3 deletions
@@ -337,9 +337,12 @@ void Timer_Silence_Reset(
 void TimerInit(
    void)
 {
+    unsigned int pcsr;
    /* enable the Timer0 peripheral clock */
    volatile AT91PS_PMC pPMC = AT91C_BASE_PMC;
-    pPMC->PMC_PCER = pPMC->PMC_PCSR | (1 << AT91C_ID_TC0);
+
+    pcsr = pPMC->PMC_PCSR;
+    pPMC->PMC_PCER = pcsr | (1 << AT91C_ID_TC0);
    /* Set up the AIC  registers for Timer 0 */
    volatile AT91PS_AIC pAIC = AT91C_BASE_AIC;
    /* Disable timer 0 interrupt */