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Diffstat (limited to 'tests/qtest/lsm303dlhc-mag-test.c')
| -rw-r--r-- | tests/qtest/lsm303dlhc-mag-test.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/tests/qtest/lsm303dlhc-mag-test.c b/tests/qtest/lsm303dlhc-mag-test.c new file mode 100644 index 0000000000..0f64e7fc67 --- /dev/null +++ b/tests/qtest/lsm303dlhc-mag-test.c @@ -0,0 +1,148 @@ +/* + * QTest testcase for the LSM303DLHC I2C magnetometer + * + * Copyright (C) 2021 Linaro Ltd. + * Written by Kevin Townsend <kevin.townsend@linaro.org> + * + * Based on: https://www.st.com/resource/en/datasheet/lsm303dlhc.pdf + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "libqtest-single.h" +#include "libqos/qgraph.h" +#include "libqos/i2c.h" +#include "qapi/qmp/qdict.h" + +#define LSM303DLHC_MAG_TEST_ID "lsm303dlhc_mag-test" +#define LSM303DLHC_MAG_REG_CRA 0x00 +#define LSM303DLHC_MAG_REG_CRB 0x01 +#define LSM303DLHC_MAG_REG_OUT_X_H 0x03 +#define LSM303DLHC_MAG_REG_OUT_Z_H 0x05 +#define LSM303DLHC_MAG_REG_OUT_Y_H 0x07 +#define LSM303DLHC_MAG_REG_IRC 0x0C +#define LSM303DLHC_MAG_REG_TEMP_OUT_H 0x31 + +static int qmp_lsm303dlhc_mag_get_property(const char *id, const char *prop) +{ + QDict *response; + int ret; + + response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, " + "'property': %s } }", id, prop); + g_assert(qdict_haskey(response, "return")); + ret = qdict_get_int(response, "return"); + qobject_unref(response); + return ret; +} + +static void qmp_lsm303dlhc_mag_set_property(const char *id, const char *prop, + int value) +{ + QDict *response; + + response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, " + "'property': %s, 'value': %d } }", id, prop, value); + g_assert(qdict_haskey(response, "return")); + qobject_unref(response); +} + +static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc) +{ + int64_t value; + QI2CDevice *i2cdev = (QI2CDevice *)obj; + + /* Check default value for CRB */ + g_assert_cmphex(i2c_get8(i2cdev, LSM303DLHC_MAG_REG_CRB), ==, 0x20); + + /* Set x to 1.0 gauss and verify the value */ + qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-x", 100000); + value = qmp_lsm303dlhc_mag_get_property( + LSM303DLHC_MAG_TEST_ID, "mag-x"); + g_assert_cmpint(value, ==, 100000); + + /* Set y to 1.5 gauss and verify the value */ + qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-y", 150000); + value = qmp_lsm303dlhc_mag_get_property( + LSM303DLHC_MAG_TEST_ID, "mag-y"); + g_assert_cmpint(value, ==, 150000); + + /* Set z to 0.5 gauss and verify the value */ + qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-z", 50000); + value = qmp_lsm303dlhc_mag_get_property( + LSM303DLHC_MAG_TEST_ID, "mag-z"); + g_assert_cmpint(value, ==, 50000); + + /* Set temperature to 23.6 C and verify the value */ + qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, + "temperature", 23600); + value = qmp_lsm303dlhc_mag_get_property( + LSM303DLHC_MAG_TEST_ID, "temperature"); + /* Should return 23.5 C due to 0.125°C steps. */ + g_assert_cmpint(value, ==, 23500); + + /* Read raw x axis registers (1 gauss = 1100 at +/-1.3 g gain) */ + value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_OUT_X_H); + g_assert_cmphex(value, ==, 1100); + + /* Read raw y axis registers (1.5 gauss = 1650 at +/- 1.3 g gain = ) */ + value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_OUT_Y_H); + g_assert_cmphex(value, ==, 1650); + + /* Read raw z axis registers (0.5 gauss = 490 at +/- 1.3 g gain = ) */ + value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_OUT_Z_H); + g_assert_cmphex(value, ==, 490); + + /* Read raw temperature registers with temp disabled (CRA = 0x10) */ + value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_TEMP_OUT_H); + g_assert_cmphex(value, ==, 0); + + /* Enable temperature reads (CRA = 0x90) */ + i2c_set8(i2cdev, LSM303DLHC_MAG_REG_CRA, 0x90); + + /* Read raw temp registers (23.5 C = 188 at 1 lsb = 0.125 C) */ + value = i2c_get16(i2cdev, LSM303DLHC_MAG_REG_TEMP_OUT_H); + g_assert_cmphex(value, ==, 188); +} + +static void reg_wraparound(void *obj, void *data, QGuestAllocator *alloc) +{ + uint8_t value[4]; + QI2CDevice *i2cdev = (QI2CDevice *)obj; + + /* Set x to 1.0 gauss, and y to 1.5 gauss for known test values */ + qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-x", 100000); + qmp_lsm303dlhc_mag_set_property(LSM303DLHC_MAG_TEST_ID, "mag-y", 150000); + + /* Check that requesting 4 bytes starting at Y_H wraps around to X_L */ + i2c_read_block(i2cdev, LSM303DLHC_MAG_REG_OUT_Y_H, value, 4); + /* 1.5 gauss = 1650 lsb = 0x672 */ + g_assert_cmphex(value[0], ==, 0x06); + g_assert_cmphex(value[1], ==, 0x72); + /* 1.0 gauss = 1100 lsb = 0x44C */ + g_assert_cmphex(value[2], ==, 0x04); + g_assert_cmphex(value[3], ==, 0x4C); + + /* Check that requesting LSM303DLHC_MAG_REG_IRC wraps around to CRA */ + i2c_read_block(i2cdev, LSM303DLHC_MAG_REG_IRC, value, 2); + /* Default value for IRC = 0x33 */ + g_assert_cmphex(value[0], ==, 0x33); + /* Default value for CRA = 0x10 */ + g_assert_cmphex(value[1], ==, 0x10); +} + +static void lsm303dlhc_mag_register_nodes(void) +{ + QOSGraphEdgeOptions opts = { + .extra_device_opts = "id=" LSM303DLHC_MAG_TEST_ID ",address=0x1e" + }; + add_qi2c_address(&opts, &(QI2CAddress) { 0x1E }); + + qos_node_create_driver("lsm303dlhc_mag", i2c_device_create); + qos_node_consumes("lsm303dlhc_mag", "i2c-bus", &opts); + + qos_add_test("tx-rx", "lsm303dlhc_mag", send_and_receive, NULL); + qos_add_test("regwrap", "lsm303dlhc_mag", reg_wraparound, NULL); +} +libqos_init(lsm303dlhc_mag_register_nodes); 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