The Kinentis 12-bit DAC in devices such as KL25Z or K64F has the data registers defined as two 8-bit registers. The byte ordering is the same as the ARM core little endian. I modified the code to write to the DATL:DATH as a singular 16-bit register and it works just fine. Is there a reason to treat them as two 8-bit registers?
int main(void) {
void DAC0_init(void);
int i;
short* dac0dat = (short*)&(DAC0->DAT[0].DATL);
DAC0_init();
while (1) {
for (i = 0; i < 0x1000; i++) {
// DAC0->DAT[0].DATL = i & 0xff;
// DAC0->DAT[0].DATH = (i >> 8) & 0x0f;
*dac0dat = i;
}
}
}
