开发板：SEED-DVS8168
仿真器：SEED-XDS560v2
CCS：Version: 6.1.0.00104
53 /* Main PLL */ 54 #define MAIN_N 56 55 #define MAIN_P 0x1 56 57 /* DSP -> 1000 MHz*/ 58 #define MAIN_INTFREQ1 0xC 59 #define MAIN_FRACFREQ1 0x189374 60 #define MAIN_MDIV1 0x1 61 62 /* ARM -> 987 MHz*/ 63 #ifdef ARM_PLL_987 64 #define MAIN_INTFREQ2 0xC 65 #define MAIN_FRACFREQ2 0x400000 66 #endif 67 #ifdef ARM_PLL_1200 68 #define MAIN_INTFREQ2 0xA 69 #define MAIN_FRACFREQ2 0x147AE1 70 #endi
根据上面的宏定义在evm816x.gel中修改如下：
/* ------------------------------------------------------------------------ *
* *
* Setup_MainPLL() *
* *
* ------------------------------------------------------------------------ */
Setup_MainPLL()
{
GEL_TextOut("\tMain PLL Init is in Progress, Please wait ..... \n","Output",1,1,1);
/* mainPLL( MAIN_N, MAIN_P, MAIN_INTFREQ1, MAIN_FRACFREQ1, MAIN_MDIV1,
MAIN_INTFREQ2, MAIN_FRACFREQ2, MAIN_MDIV2,
MAIN_INTFREQ3, MAIN_FRACFREQ3, MAIN_MDIV3,
MAIN_INTFREQ4, MAIN_FRACFREQ4, MAIN_MDIV4,
MAIN_INTFREQ5, MAIN_FRACFREQ5, MAIN_MDIV5,
MAIN_MDIV6, MAIN_MDIV7)*/
/* mainPLL(64, 0x1, 0x8, 0x800000, 0x2, */ // 800 MHz GEM
mainPLL(64, 0x1, 0xC, 0x189374, 0x1, // 1000 MHz GEM
0xE, 0x0, 0x1, // 987 MHz A8, SGX derives from this
0x8, 0xAAAAB0, 0x3, // 530 MHz IVA
0x9, 0x55554F, 0x3, // 493 MHz L3
0x9, 0x374BC6, 0xC, // 125 MHz CPGMAC
0x48, 0x4); // 24 MHz USB, 432 MHz for Audio PLL
GEL_TextOut("\tMain PLL Init is Done ..... \n","Output",1,1,1);
}
GEL文件做上述修改，由800 MHz GEM到1000 MHz GEM。
使用下面代码测试发现：
#include <xdc/std.h>
#include <xdc/runtime/System.h>
#include <xdc/runtime/Timestamp.h>
#include <xdc/runtime/Types.h>
/* ======== main ======== */
Int main(Int argc, String argv[]){
Types_FreqHz freq;
Timestamp_getFreq(&freq);
System_printf("freq = {0x%x : 0x%x}\n", freq.hi, freq.lo);
System_printf("time = 0x%x\n", Timestamp_get32());
System_printf("time = 0x%x\n", Timestamp_get32());
return (0);
}
freq = {0x0 : 0x2faf0800}
0x2faf0800换算成十进制：800000000
DSP主频修改为1000 MHz失败。
请问，是否还有其它地方需要设置？我是在DM8168的DSP端单独开发。
