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Merge pull request #16223 from chrysn-pull-requests/dac-dds-int-range

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tests/dac_dds: Fix sine wave to fit in PCM range
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benpicco 2021-04-13 14:57:58 +02:00 committed by GitHub
commit 0ede891755
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1 changed files with 2 additions and 0 deletions
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tests/driver_dac_dds/main.c
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@ -127,6 +127,7 @@ static void _fill_sine_samples_8(uint8_t *buf, size_t len, uint16_t period)
for (uint16_t i = 0; i < period; ++i) { for (uint16_t i = 0; i < period; ++i) {
x += step; x += step;
buf[i] = isin(x) >> 5; buf[i] = isin(x) >> 5;
buf[i] += INT8_MAX + 1;
} }
for (uint16_t i = period; i < len; i += period) { for (uint16_t i = period; i < len; i += period) {
@ -145,6 +146,7 @@ static void _fill_sine_samples_16(uint8_t *buf, size_t len, uint16_t period)
x += step; x += step;
uint16_t y = isin(x); uint16_t y = isin(x);
y += INT16_MAX + 1;
buf[i] = y; buf[i] = y;
buf[++i] = y >> 8; buf[++i] = y >> 8;
} }