K64F - DAC update - tested with test a8

	- internal reference set to VDDA
	- PinName DAC0_OUT

Author: 0xc0170

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/PinNames.h

@@ -227,6 +227,8 @@ typedef enum {
     A4 = PTB1,
     A5 = PTB0,
 
+    DAC0_OUT = 0xFEFE, /* DAC does not have Pin Name in RM */
+
     // Not connected
     NC = (int)0xFFFFFFFF
 } PinName;

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/analogout_api.c

@@ -22,8 +22,8 @@
 #define RANGE_12BIT     0xFFF
 
 const PinMap PinMap_DAC[] = {
-    {PTE23, DAC_0, 0},
-    {NC   , NC   , 0}
+    {DAC0_OUT, DAC_0, 0},
+    {NC      , NC   , 0}
 };
 
 void analogout_init(dac_t *obj, PinName pin) {
@@ -32,20 +32,16 @@ void analogout_init(dac_t *obj, PinName pin) {
         error("DAC pin mapping failed");
     }
 
-    SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK;
-
-    uint32_t port = (uint32_t)pin >> GPIO_PORT_SHIFT;
-    SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
+    SIM->SCGC2 |= SIM_SCGC2_DAC0_MASK;
 
     DAC0->DAT[obj->dac].DATH = 0;
     DAC0->DAT[obj->dac].DATL = 0;
 
-    DAC0->C1 = DAC_C1_DACBFMD_MASK;     // One-Time Scan Mode
-
-    DAC0->C0 = DAC_C0_DACEN_MASK        // Enable
-             | DAC_C0_DACSWTRG_MASK;    // Software Trigger
+    DAC0->C1 = DAC_C1_DACBFMD(2);     // One-Time Scan Mode
 
-    pinmap_pinout(pin, PinMap_DAC);
+    DAC0->C0 = DAC_C0_DACEN_MASK      // Enable
+             | DAC_C0_DACSWTRG_MASK   // Software Trigger
+             | DAC_C0_DACRFS_MASK;    // VDDA selected
 
     analogout_write_u16(obj, 0);
 }