Analog Devices ADSP-BF506F Hardware Reference Manual page 1189

Listing 24-5. Changing PLL and Voltage Regulator in C Language
#include <ccblkfn.h>
#include <bfrom.h>
void init_DPM(ADI_BOOT_DATA* pBS)
{
ADI_SYSCTRL_VALUES init_DPM;
init_DPM.uwPllCtl = SET_MSEL(12);
init_DPM.uwPllDiv = (SET_SSEL(4) | CSEL_DIV1);
init_DPM.uwPllLockCnt = 0x0200;
bfrom_SysControl(SYSCTRL_EXTVOLTAGE | SYSCTRL_PLLCTL |
SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT | SYSCTRL_WRITE, &init_DPM,
NULL);
}
Listing 24-6. Changing PLL and Voltage Regulator in Assembly
#include <blackfin.h>
#include <bfrom.h>
.import "bfrom.h";
/* Load Immediate 32-bit value into data or address register */
#define IMM32(reg,val) reg##.H=hi(val); reg##.L=lo(val)
.SECTION L1_code;
init_DPM:
link sizeof(ADI_SYSCTRL_VALUES)+2;
[--SP] = (R7:0,P5:5);
SP += -12;
R0.L = SET_MSEL(12);
w[FP+-sizeof(ADI_SYSCTRL_VALUES)+offse-
tof(ADI_SYSCTRL_VALUES,uwPllCtl)] = R0;
R0.L = (SET_SSEL(4) | CSEL_DIV1);
w[FP+-sizeof(ADI_SYSCTRL_VALUES)+offse-
tof(ADI_SYSCTRL_VALUES,uwPllDiv)] = R0;
R0.L = 0x0200;
ADSP-BF50x Blackfin Processor Hardware Reference
System Reset and Booting
24-85