dev/ad9910: implement ad9910_frequency_to_ftw()

94dc30f4 · Tomasz Wlostowski · 996c13fc · 94dc30f4 · 94dc30f4
Commit 94dc30f4 authored Apr 23, 2020 by Tomasz Wlostowski
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ad9910.c dev/ad9910.c +7 -0

ad9910.h include/dev/ad9910.h +1 -0

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--- a/dev/ad9910.c
+++ b/dev/ad9910.c
@@ -82,6 +82,11 @@ int ad9910_probe( struct ad9910_device *dev, struct spi_bus *bus, void (*trigger
    return (id == AD9910_DEFAULT_CFR1) ? 0 : -1;
 }

+uint64_t ad9910_frequency_to_ftw( struct ad9910_device *dev, uint64_t freq_hz )
+{
+    return  (1ULL << 32) * freq_hz / AD9910_REF_FREQ;
+}
+

 int ad9910_program( struct ad9910_device *dev, uint64_t ftw_n, int phase, int fs_current )
 {
@@ -92,6 +97,8 @@ int ad9910_program( struct ad9910_device *dev, uint64_t ftw_n, int phase, int fs
    uint64_t ftw = ftw_n;
    uint64_t prof0_cr = ftw | (0x8b5ULL << 48); 

+    dev_dbg("ad9910 FTW = %d\n", (uint32_t) ftw);
+
 //    dev_dbg("ad9910_program [%08x%08x] asf %d!\n", (uint32_t)(prof0_cr >> 32), (uint32_t)prof0_cr, asf );

    for(i = 0; ad9910_default_config[i].addr >= 0; i++)

--- a/include/dev/ad9910.h
+++ b/include/dev/ad9910.h
@@ -46,5 +46,6 @@ void ad9910_write(struct ad9910_device *dev, uint32_t reg, uint64_t value, int n
 int ad9910_probe( struct ad9910_device *dev, struct spi_bus *bus, void (*trigger_io_update)(struct ad9910_device *dev) );
 void ad9910_trigger_update(struct ad9910_device *dev);
 void ad9910_configure_sync( struct ad9910_device *dev, int enable, int fine_delay_taps );
+uint64_t ad9910_frequency_to_ftw( struct ad9910_device *dev, uint64_t freq_hz );

 #endif