小弟是PSoC5的初学者，现在准备用Counter做一个信号发生器的频率控制，在其计数周期满了之后，让波形表中数据输出一个，DA输出，不断循环，然后完成波形的输出，但是这样做出来结果不行，波形一半正弦波 一半杂波，并且频率最高只有1.5k的样子，怎么想都不知道问题在哪儿，故想向各位大侠求解，在此谢过了
下面是我的程序段：
#include <device.h>
const uint8 voltageSineWave[400] =
{
64,65,66,67,68,70,71,72,73,74,75,76,77,78,79,81,82,83,84,85,
86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,103,104,105,
106,107,108,108,109,110,111,112,112,113,114,114,115,116,116,117,118,118,119,119,120,
121,121,122,122,122,123,123,124,124,125,125,125,126,126,126,126,127,127,127,127,127,
128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,127,127,127,127,127,126,
126,126,126,125,125,125,124,124,123,123,122,122,122,121,121,120,119,119,118,118,117,
116,116,115,114,114,113,112,112,111,110,109,108,108,107,106,105,104,103,103,102,101,
100,99,98,97,96,95,94,93,92,91,90,89,88,87,86,85,84,83,82,81,79,78,
77,76,75,74,73,72,71,70,68,67,66,65,64,63,62,61,60,58,57,56,55,
54,53,52,51,50,49,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,
32,31,30,29,28,27,26,25,25,24,23,22,21,20,20,19,18,17,16,16,15,
14,14,13,12,12,11,10,10,9,9,8,7,7,6,6,6,5,5,4,4,3,
3,3,2,2,2,2,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,1,1,1,1,1,2,2,2,2,3,3,3,4,4,5,5,
6,6,6,7,7,8,9,9,10,10,11,12,12,13,14,14,15,16,16,17,18,19,
20,20,21,22,23,24,25,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,
40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,58,60,61,62,63
};
uint16 f = 10000;
uint16 i=0;
void main()
{
CYGlobalIntDisable;
VDAC8_1_Start(); /* Initializes VDAC8 with default values */
Opamp_1_Start(); /* Enables Opamp and sets power level */
isr_1_Start();
CYGlobalIntEnable;
uint16 Period = 3000000/(122*f);/*3000000为时钟频率，122为所取波形表点数*/
Counter_1_Start();
Counter_1_WritePeriod(Period);
while(1);
}
中断程序：
extern uint16 voltageSineWave[400];
extern uint16 i;
void isr_1_Interrupt(void)
{
/* Place your Interrupt code here. */
/* `#START isr_1_Interrupt` */
Counter_1_Stop();
isr_1_Disable();
Counter_1_ReadStatusRegister();
VDAC8_1_SetValue(voltageSineWave[i]); /* transport to AD */
i=i+3;
if(i>=360)
{
i=0;
}
isr_1_Enable();
Counter_1_Start();
/* `#END` */
} |
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