Specs are available here : https://www.nxp.com/docs/en/application-note/AN264.pdf This is a simple model supporting the basic registers for led and GPIO mode. The device also supports two blinking rates but not the model yet. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20180530064049.27976-7-clg@kaod.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
167 lines
4.8 KiB
C
167 lines
4.8 KiB
C
/*
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* QTest testcase for the TMP105 temperature sensor
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*
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* Copyright (c) 2012 Andreas Färber
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "libqtest.h"
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#include "libqos/i2c.h"
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#include "qapi/qmp/qdict.h"
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#include "hw/misc/tmp105_regs.h"
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#define TMP105_TEST_ID "tmp105-test"
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#define TMP105_TEST_ADDR 0x49
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static I2CAdapter *i2c;
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static uint16_t tmp105_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
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{
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uint8_t resp[1];
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i2c_send(i2c, addr, ®, 1);
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i2c_recv(i2c, addr, resp, 1);
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return resp[0];
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}
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static uint16_t tmp105_get16(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
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{
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uint8_t resp[2];
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i2c_send(i2c, addr, ®, 1);
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i2c_recv(i2c, addr, resp, 2);
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return (resp[0] << 8) | resp[1];
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}
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static void tmp105_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
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uint8_t value)
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{
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uint8_t cmd[2];
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uint8_t resp[1];
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cmd[0] = reg;
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cmd[1] = value;
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i2c_send(i2c, addr, cmd, 2);
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i2c_recv(i2c, addr, resp, 1);
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g_assert_cmphex(resp[0], ==, cmd[1]);
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}
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static void tmp105_set16(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
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uint16_t value)
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{
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uint8_t cmd[3];
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uint8_t resp[2];
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cmd[0] = reg;
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cmd[1] = value >> 8;
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cmd[2] = value & 255;
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i2c_send(i2c, addr, cmd, 3);
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i2c_recv(i2c, addr, resp, 2);
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g_assert_cmphex(resp[0], ==, cmd[1]);
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g_assert_cmphex(resp[1], ==, cmd[2]);
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}
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static int qmp_tmp105_get_temperature(const char *id)
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{
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QDict *response;
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int ret;
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response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
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"'property': 'temperature' } }", id);
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g_assert(qdict_haskey(response, "return"));
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ret = qdict_get_int(response, "return");
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qobject_unref(response);
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return ret;
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}
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static void qmp_tmp105_set_temperature(const char *id, int value)
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{
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QDict *response;
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response = qmp("{ 'execute': 'qom-set', 'arguments': { 'path': %s, "
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"'property': 'temperature', 'value': %d } }", id, value);
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g_assert(qdict_haskey(response, "return"));
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qobject_unref(response);
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}
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#define TMP105_PRECISION (1000/16)
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static void send_and_receive(void)
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{
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uint16_t value;
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value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
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g_assert_cmpuint(value, ==, 0);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0);
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qmp_tmp105_set_temperature(TMP105_TEST_ID, 20000);
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value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
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g_assert_cmpuint(value, ==, 20000);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0x1400);
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qmp_tmp105_set_temperature(TMP105_TEST_ID, 20938); /* 20 + 15/16 */
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value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
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g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
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g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
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/* Set config */
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tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60);
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value = tmp105_get8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG);
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g_assert_cmphex(value, ==, 0x60);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0x14f0);
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/* Set precision to 9, 10, 11 bits. */
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tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x00);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0x1480);
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tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x20);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0x14c0);
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tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x40);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0x14e0);
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/* stored precision remains the same */
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value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
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g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
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g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
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tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60);
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value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
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g_assert_cmphex(value, ==, 0x14f0);
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tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_LOW, 0x1234);
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tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_HIGH, 0x4231);
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}
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int main(int argc, char **argv)
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{
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QTestState *s = NULL;
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int ret;
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g_test_init(&argc, &argv, NULL);
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s = qtest_start("-machine n800 "
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"-device tmp105,bus=i2c-bus.0,id=" TMP105_TEST_ID
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",address=0x49");
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i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
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qtest_add_func("/tmp105/tx-rx", send_and_receive);
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ret = g_test_run();
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qtest_quit(s);
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g_free(i2c);
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return ret;
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}
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