DAC.rar_AduC7026

/******************************************************************** Author : ADI - Apps www.analog.com/MicroConverter Date : Sept. 2005 File : DACsine.c Hardware : Applicable to ADuC702x rev H or I silicon Currently targetting ADuC7026. Description : DAC outputs a sine wave on pin 10 (DAC1). S1.8 must be off DAC is updated with core clock frequency 45MHz. ********************************************************************/ #include<ADuC7026.h> void sys_clk_init(void) { PLLKEY1=0xAA; PLLCON=0x11; //PLL配置 PLLKEY2=0x55; POWKEY1=0x01; POWCON=0x00; //CPU时钟配置为41.78MHz POWKEY2=0xF4; // while(!(PLLSTA & 0x01)); } int main (void) { // Table is placed in Flash/EE const static unsigned short TableS[64] = { 0x07FF, 0x08C8, 0x098E, 0x0A51, 0x0B0F, 0x0BC4, 0x0C71, 0x0D12, 0x0DA7, 0x0E2E, 0x0EA5, 0x0F0D, 0x0F63, 0x0FA6, 0x0FD7, 0x0FF5, 0x0FFF, 0x0FF5, 0x0FD7, 0x0FA6, 0x0F63, 0x0F0D, 0x0EA5, 0x0E2E, 0x0DA7, 0x0D12, 0x0C71, 0x0BC4, 0x0B0F, 0x0A51, 0x098E, 0x08C8, 0x07FF, 0x0736, 0x0670, 0x05AD, 0x04EF, 0x043A, 0x038D, 0x02EC, 0x0257, 0x01D0, 0x0159, 0x00F1, 0x009B, 0x0058, 0x0027, 0x0009, 0x0000, 0x0009, 0x0027, 0x0058, 0x009B, 0x00F1, 0x0159, 0x01D0, 0x0257, 0x02EC, 0x038D, 0x043A, 0x04EF, 0x05AD, 0x0670, 0x0736 }; int i = 0; sys_clk_init(); // DAC configuration DAC1CON = 0x13; // DAC configuration // range AVdd/AGND // DAC1 is updated with falling edge of core clock DAC1DAT = 0x08000000; // start from midscale while(1){ DAC1DAT = (TableS[i] << 16); i++; i &= 0x03f; } return (0); }