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42 lines
884 B
C
42 lines
884 B
C
#include <hw/common.h>
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#include "dds.h"
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#define DDS_FTW0 0x0a
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#define DDS_FTW1 0x0b
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#define DDS_FTW2 0x0c
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#define DDS_FTW3 0x0d
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#define DDS_FUD 0x40
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#define DDS_GPIO 0x41
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#define DDS_READ(addr) \
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MMPTR(0xb0000000 + (addr)*4)
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#define DDS_WRITE(addr, data) \
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MMPTR(0xb0000000 + (addr)*4) = data
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void dds_init(void)
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{
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int i;
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for(i=0;i<8;i++) {
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DDS_WRITE(DDS_GPIO, i | (1 << 7));
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DDS_WRITE(DDS_GPIO, i);
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DDS_WRITE(0x00, 0x78);
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DDS_WRITE(0x01, 0x00);
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DDS_WRITE(0x02, 0x00);
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DDS_WRITE(0x03, 0x00);
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DDS_WRITE(DDS_FUD, 0);
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}
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}
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void dds_program(int channel, int ftw)
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{
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DDS_WRITE(DDS_GPIO, channel);
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DDS_WRITE(DDS_FTW0, ftw & 0xff);
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DDS_WRITE(DDS_FTW1, (ftw >> 8) & 0xff);
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DDS_WRITE(DDS_FTW2, (ftw >> 16) & 0xff);
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DDS_WRITE(DDS_FTW3, (ftw >> 24) & 0xff);
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DDS_WRITE(DDS_FUD, 0);
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}
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