Commit 7ec543e4 authored by Steffen Görtz's avatar Steffen Görtz Committed by Peter Maydell
Browse files

tests/microbit-test: Add Tests for nRF51 Timer 



Basic tests for nRF51 Timer Peripheral.

Signed-off-by: default avatarSteffen Görtz <contrib@steffen-goertz.de>
Reviewed-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190103091119.9367-11-stefanha@redhat.com
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent 60facd90

tests/microbit-test.c

+95 −0
Original line number Diff line number Diff line
@@ -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();