AD9832 DDS Sinewave (Based on MLabo's AD9834 DDS Sinewave)
Diff: main.cpp
- Revision:
- 0:df9eb1db9177
- Child:
- 1:323280ad1468
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon May 28 00:21:06 2012 +0000 @@ -0,0 +1,88 @@ +/*AD9834 DDS Test 2011/07/14 MLabo*/ +/*AD9832 DDS Test based on 2011/07/14 MLabo, by Sakura,Fuyuno */ +#include "mbed.h" +#include "TextLCD.h" + +#define XTAL_FREQ ((double)16160000.0) + +DigitalOut FSYNC(p8); +DigitalOut SCLK(p7); +DigitalOut SDATA(p5); +Serial pc(USBTX,USBRX); + +void serial_out(uint16_t data) { + FSYNC = 0; + data & 0x8000? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x4000? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x2000? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x1000? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0800? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0400? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0200? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0100? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0080? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0040? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0020? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0010? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0008? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0004? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0002? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + data & 0x0001? SDATA = 1 : SDATA = 0; SCLK = 0; SCLK = 1; + FSYNC = 1; +} + +typedef union { + uint32_t UI; + uint8_t B[4]; +} FREQDATA ; + +void AD9832_Init(void) { + FREQDATA FreqReg ; + FreqReg.UI = 0 ; + serial_out(0xF800); + serial_out(0x3300 + FreqReg.B[3]); + serial_out(0x2200 + FreqReg.B[2]); + serial_out(0x3100 + FreqReg.B[1]); + serial_out(0x2000 + FreqReg.B[0]); + serial_out(0xC000); +} + +void AD9832_SetFreq(double freq) { + FREQDATA FreqReg ; + FreqReg.UI = (uint32_t)(freq * (double)(0x100000000UL) / (XTAL_FREQ) + 0.5); + serial_out(0x3300 + FreqReg.B[3]); + serial_out(0x2200 + FreqReg.B[2]); + serial_out(0x3100 + FreqReg.B[1]); + serial_out(0x2000 + FreqReg.B[0]); +} + +int main() { + double freq ; + char buf[256] ; + int i,ptr ; + + pc.baud(38400); + SCLK = 1; + SDATA = 0; + FSYNC = 1; + AD9832_Init(); + AD9832_SetFreq(60.0) ; + while(1) { + pc.printf("\r\nAD9832>"); + ptr = 0; + while(1) { + if (pc.readable()) { + i = pc.getc() ; + if (i == 0x0D) { + buf[ptr] = '\0' ; + break ; + } + pc.putc(i) ; + buf[ptr++] = i ; + } + } + freq = atof(buf) ; + pc.printf("\r\nFreq SET:%g",freq); + AD9832_SetFreq(freq) ; + } +}