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tests/microbit-test: Add Tests for nRF51 Timer

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Basic tests for nRF51 Timer Peripheral.

Signed-off-by: Steffen Görtz <contrib@steffen-goertz.de>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190103091119.9367-11-stefanha@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Steffen Görtz 2019-01-07 15:23:47 +00:00 committed by Peter Maydell
parent 60facd906b
commit 7ec543e4b9
1 changed files with 95 additions and 0 deletions
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95
tests/microbit-test.c
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@ -20,6 +20,7 @@
#include "hw/arm/nrf51.h"
#include "hw/gpio/nrf51_gpio.h"
#include "hw/timer/nrf51_timer.h"
static void test_nrf51_gpio(void)
{
@ -143,6 +144,99 @@ static void test_nrf51_gpio(void)
qtest_set_irq_in(global_qtest, "/machine/nrf51", "unnamed-gpio-in", 0, 0);
}
static void timer_task(hwaddr task)
{
writel(NRF51_TIMER_BASE + task, NRF51_TRIGGER_TASK);
}
static void timer_clear_event(hwaddr event)
{
writel(NRF51_TIMER_BASE + event, NRF51_EVENT_CLEAR);
}
static void timer_set_bitmode(uint8_t mode)
{
writel(NRF51_TIMER_BASE + NRF51_TIMER_REG_BITMODE, mode);
}
static void timer_set_prescaler(uint8_t prescaler)
{
writel(NRF51_TIMER_BASE + NRF51_TIMER_REG_PRESCALER, prescaler);
}
static void timer_set_cc(size_t idx, uint32_t value)
{
writel(NRF51_TIMER_BASE + NRF51_TIMER_REG_CC0 + idx * 4, value);
}
static void timer_assert_events(uint32_t ev0, uint32_t ev1, uint32_t ev2,
uint32_t ev3)
{
g_assert(readl(NRF51_TIMER_BASE + NRF51_TIMER_EVENT_COMPARE_0) == ev0);
g_assert(readl(NRF51_TIMER_BASE + NRF51_TIMER_EVENT_COMPARE_1) == ev1);
g_assert(readl(NRF51_TIMER_BASE + NRF51_TIMER_EVENT_COMPARE_2) == ev2);
g_assert(readl(NRF51_TIMER_BASE + NRF51_TIMER_EVENT_COMPARE_3) == ev3);
}
static void test_nrf51_timer(void)
{
uint32_t steps_to_overflow = 408;
/* Compare Match */
timer_task(NRF51_TIMER_TASK_STOP);
timer_task(NRF51_TIMER_TASK_CLEAR);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_0);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_1);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_2);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_3);
timer_set_bitmode(NRF51_TIMER_WIDTH_16); /* 16 MHz Timer */
timer_set_prescaler(0);
/* Swept over in first step */
timer_set_cc(0, 2);
/* Barely miss on first step */
timer_set_cc(1, 162);
/* Spot on on third step */
timer_set_cc(2, 480);
timer_assert_events(0, 0, 0, 0);
timer_task(NRF51_TIMER_TASK_START);
clock_step(10000);
timer_assert_events(1, 0, 0, 0);
/* Swept over on first overflow */
timer_set_cc(3, 114);
clock_step(10000);
timer_assert_events(1, 1, 0, 0);
clock_step(10000);
timer_assert_events(1, 1, 1, 0);
/* Wrap time until internal counter overflows */
while (steps_to_overflow--) {
timer_assert_events(1, 1, 1, 0);
clock_step(10000);
}
timer_assert_events(1, 1, 1, 1);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_0);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_1);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_2);
timer_clear_event(NRF51_TIMER_EVENT_COMPARE_3);
timer_assert_events(0, 0, 0, 0);
timer_task(NRF51_TIMER_TASK_STOP);
/* Test Proposal: Stop/Shutdown */
/* Test Proposal: Shortcut Compare -> Clear */
/* Test Proposal: Shortcut Compare -> Stop */
/* Test Proposal: Counter Mode */
}
int main(int argc, char **argv)
{
int ret;
@ -152,6 +246,7 @@ int main(int argc, char **argv)
global_qtest = qtest_initf("-machine microbit");
qtest_add_func("/microbit/nrf51/gpio", test_nrf51_gpio);
qtest_add_func("/microbit/nrf51/timer", test_nrf51_timer);
ret = g_test_run();