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5141d4158c
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>
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
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* QTest testcase for the PCA9552 LED blinker
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*
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* Copyright (c) 2017-2018, IBM Corporation.
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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 "hw/misc/pca9552_regs.h"
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#define PCA9552_TEST_ID "pca9552-test"
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#define PCA9552_TEST_ADDR 0x60
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static I2CAdapter *i2c;
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static uint8_t pca9552_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 void pca9552_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 receive_autoinc(void)
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{
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uint8_t resp;
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uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
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i2c_send(i2c, PCA9552_TEST_ADDR, ®, 1);
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/* PCA9552_LS0 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x54);
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/* PCA9552_LS1 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x55);
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/* PCA9552_LS2 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x55);
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/* PCA9552_LS3 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x54);
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}
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static void send_and_receive(void)
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{
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uint8_t value;
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
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g_assert_cmphex(value, ==, 0x55);
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
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g_assert_cmphex(value, ==, 0x0);
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/* Switch on LED 0 */
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pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0, 0x54);
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
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g_assert_cmphex(value, ==, 0x54);
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
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g_assert_cmphex(value, ==, 0x01);
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/* Switch on LED 12 */
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pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3, 0x54);
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3);
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g_assert_cmphex(value, ==, 0x54);
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT1);
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g_assert_cmphex(value, ==, 0x10);
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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 pca9552,bus=i2c-bus.0,id=" PCA9552_TEST_ID
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",address=0x60");
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i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
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qtest_add_func("/pca9552/tx-rx", send_and_receive);
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qtest_add_func("/pca9552/rx-autoinc", receive_autoinc);
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ret = g_test_run();
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if (s) {
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qtest_quit(s);
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}
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g_free(i2c);
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return ret;
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}
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