Cover single-ended voltage conversion across all channels, voltage and temperature boundary and clamping cases, and scaling against an external voltage reference.
Signed-off-by: Emmanuel Blot <[email protected]> --- tests/qtest/adc128d818-test.c | 189 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 189 insertions(+) diff --git a/tests/qtest/adc128d818-test.c b/tests/qtest/adc128d818-test.c index 9a8811256f..891189f0bd 100644 --- a/tests/qtest/adc128d818-test.c +++ b/tests/qtest/adc128d818-test.c @@ -150,6 +150,186 @@ static void test_ain_property(void *obj, void *data, QGuestAllocator *alloc) g_assert_cmpint(value, ==, 37500); } +/* Voltage conversion */ +static void test_voltage_conversion(void *obj, void *data, + QGuestAllocator *alloc) +{ + QI2CDevice *dev = (QI2CDevice *)obj; + uint16_t reading; + + qmp_adc128d818_set("ain0", 1280); + g_test_message("Injected ain0 = 1280 mV"); + i2c_set8(dev, REG_CONFIG, CONFIG_START); + + reading = i2c_get16(dev, REG_CH_READING_BASE); + g_test_message("Read ch0: raw 0x%04x -> %u mV", reading, + (reading >> 4u) * INTERNAL_VREF_MV / 4096u); + g_assert_cmphex(reading, ==, 0x8000); + + qmp_adc128d818_set("ain1", 2560); + g_test_message("Injected ain1 = 2560 mV"); + reading = i2c_get16(dev, REG_CH_READING_BASE + 1u); + g_test_message("Read ch1: raw 0x%04x -> %u mV", reading, + (reading >> 4u) * INTERNAL_VREF_MV / 4096u); + g_assert_cmphex(reading, ==, 0xFFF0); + + qmp_adc128d818_set("ain2", 0); + g_test_message("Injected ain2 = 0 mV"); + reading = i2c_get16(dev, REG_CH_READING_BASE + 2u); + g_test_message("Read ch2: raw 0x%04x -> %u mV", reading, + (reading >> 4u) * INTERNAL_VREF_MV / 4096u); + g_assert_cmphex(reading, ==, 0x0000); +} + +/* Temperature conversion (mode 0, channel 7 = temperature) */ +static void +test_temperature_conversion(void *obj, void *data, QGuestAllocator *alloc) +{ + QI2CDevice *dev = (QI2CDevice *)obj; + uint16_t reading; + + qmp_adc128d818_set("temperature", 25000); + g_test_message("Injected temperature = 25000 mC (25.0 deg C)"); + i2c_set8(dev, REG_CONFIG, CONFIG_START); + + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("Read ch7: raw 0x%04x -> %d mC", reading, + (int16_t)(reading & 0xFF80u) * 500 / 128); + g_assert_cmphex(reading, ==, 0x1900); +} + +/* Channels with distinct voltages */ +static void test_all_channels(void *obj, void *data, QGuestAllocator *alloc) +{ + QI2CDevice *dev = (QI2CDevice *)obj; + static const uint16_t ain_mv[NUM_CHANNELS] = { + 0, 320, 640, 960, 1280, 1920, 2240, 2560 + }; + static const uint16_t expect[NUM_CHANNELS] = { + 0x0000, 0x2000, 0x4000, 0x6000, 0x8000, 0xC000, 0xE000, 0xFFF0 + }; + uint16_t reading; + unsigned ch; + + i2c_set8(dev, REG_CONFIG, CONFIG_INITIALIZATION); + i2c_set8(dev, REG_ADV_CONFIG, ADV_CONFIG_MODE_1); + + for (ch = 0u; ch < NUM_CHANNELS; ch++) { + char name[8]; + snprintf(name, sizeof(name), "ain%u", ch); + qmp_adc128d818_set(name, ain_mv[ch]); + } + + i2c_set8(dev, REG_CONFIG, CONFIG_START); + + for (ch = 0u; ch < NUM_CHANNELS; ch++) { + reading = i2c_get16(dev, REG_CH_READING_BASE + ch); + g_test_message("ch%u: ain %u mV -> raw 0x%04x (expect 0x%04x)", + ch, ain_mv[ch], reading, expect[ch]); + g_assert_cmphex(reading, ==, expect[ch]); + } +} + +/* Voltage conversion edge cases */ +static void test_voltage_edges(void *obj, void *data, QGuestAllocator *alloc) +{ + QI2CDevice *dev = (QI2CDevice *)obj; + uint16_t reading; + + i2c_set8(dev, REG_CONFIG, CONFIG_INITIALIZATION); + i2c_set8(dev, REG_ADV_CONFIG, ADV_CONFIG_MODE_1); + + qmp_adc128d818_set("ain0", 3000); + i2c_set8(dev, REG_CONFIG, CONFIG_START); + + reading = i2c_get16(dev, REG_CH_READING_BASE); + g_test_message("Over-range 3000 mV: raw 0x%04x (expect 0xFFF0)", reading); + g_assert_cmphex(reading, ==, 0xFFF0); + + qmp_adc128d818_set("ain1", 1); + reading = i2c_get16(dev, REG_CH_READING_BASE + 1u); + g_test_message("1 mV: raw 0x%04x (expect 0x0010)", reading); + g_assert_cmphex(reading, ==, 0x0010); + + qmp_adc128d818_set("ain2", 640); + reading = i2c_get16(dev, REG_CH_READING_BASE + 2u); + g_test_message("640 mV (quarter): raw 0x%04x (expect 0x4000)", reading); + g_assert_cmphex(reading, ==, 0x4000); + + qmp_adc128d818_set("ain3", 1920); + reading = i2c_get16(dev, REG_CH_READING_BASE + 3u); + g_test_message("1920 mV (3/4): raw 0x%04x (expect 0xC000)", reading); + g_assert_cmphex(reading, ==, 0xC000); +} + +/* Temperature conversion edge cases */ +static void test_temperature_edges(void *obj, void *data, + QGuestAllocator *alloc) +{ + QI2CDevice *dev = (QI2CDevice *)obj; + uint16_t reading; + + i2c_set8(dev, REG_CONFIG, CONFIG_INITIALIZATION); + + qmp_adc128d818_set("temperature", 0); + i2c_set8(dev, REG_CONFIG, CONFIG_START); + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("0 C: raw 0x%04x (expect 0x0000)", reading); + g_assert_cmphex(reading, ==, 0x0000); + + qmp_adc128d818_set("temperature", -25000); + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("-25 C: raw 0x%04x (expect 0xE700)", reading); + g_assert_cmphex(reading, ==, 0xE700); + + qmp_adc128d818_set("temperature", 127500); + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("+127.5 C: raw 0x%04x (expect 0x7F80)", reading); + g_assert_cmphex(reading, ==, 0x7F80); + + qmp_adc128d818_set("temperature", -128000); + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("-128 C: raw 0x%04x (expect 0x8000)", reading); + g_assert_cmphex(reading, ==, 0x8000); + + qmp_adc128d818_set("temperature", 200000); + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("200 C (clamped): raw 0x%04x (expect 0x7F80)", reading); + g_assert_cmphex(reading, ==, 0x7F80); + + qmp_adc128d818_set("temperature", -200000); + reading = i2c_get16(dev, REG_CH_READING_BASE + 7u); + g_test_message("-200 C (clamped): raw 0x%04x (expect 0x8000)", reading); + g_assert_cmphex(reading, ==, 0x8000); +} + +/* External voltage reference */ +static void test_ext_vref(void *obj, void *data, QGuestAllocator *alloc) +{ + QI2CDevice *dev = (QI2CDevice *)obj; + uint16_t reading; + + i2c_set8(dev, REG_CONFIG, CONFIG_INITIALIZATION); + i2c_set8(dev, REG_ADV_CONFIG, ADV_CONFIG_MODE_1); + + qmp_adc128d818_set("ext-vref-mv", 4096); + i2c_set8(dev, REG_ADV_CONFIG, ADV_CONFIG_EXT_REF_EN | ADV_CONFIG_MODE_1); + + qmp_adc128d818_set("ain0", 1000); + i2c_set8(dev, REG_CONFIG, CONFIG_START); + + reading = i2c_get16(dev, REG_CH_READING_BASE); + g_test_message("1000 mV / 4096 mV VREF: raw 0x%04x (expect 0x3E80)", + reading); + g_assert_cmphex(reading, ==, 0x3E80); + + qmp_adc128d818_set("ain1", 2048); + reading = i2c_get16(dev, REG_CH_READING_BASE + 1u); + g_test_message("2048 mV / 4096 mV VREF: raw 0x%04x (expect 0x8000)", + reading); + g_assert_cmphex(reading, ==, 0x8000); +} + static void adc128d818_register_nodes(void) { QOSGraphEdgeOptions opts = { @@ -165,5 +345,14 @@ static void adc128d818_register_nodes(void) qos_add_test("defaults", "adc128d818", test_defaults, NULL); qos_add_test("soft-reset", "adc128d818", test_soft_reset, NULL); qos_add_test("ain-property", "adc128d818", test_ain_property, NULL); + qos_add_test("voltage-conversion", "adc128d818", test_voltage_conversion, + NULL); + qos_add_test("temperature-conversion", "adc128d818", + test_temperature_conversion, NULL); + qos_add_test("all-channels", "adc128d818", test_all_channels, NULL); + qos_add_test("voltage-edges", "adc128d818", test_voltage_edges, NULL); + qos_add_test("temperature-edges", "adc128d818", test_temperature_edges, + NULL); + qos_add_test("ext-vref", "adc128d818", test_ext_vref, NULL); } libqos_init(adc128d818_register_nodes); -- 2.50.1
