diff options
| -rw-r--r-- | tests/microbit-test.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/tests/microbit-test.c b/tests/microbit-test.c index 0c12553..dcdc0cd 100644 --- a/tests/microbit-test.c +++ b/tests/microbit-test.c @@ -21,6 +21,49 @@ #include "hw/arm/nrf51.h" #include "hw/gpio/nrf51_gpio.h" #include "hw/timer/nrf51_timer.h" +#include "hw/i2c/microbit_i2c.h" + +/* Read a byte from I2C device at @addr from register @reg */ +static uint32_t i2c_read_byte(uint32_t addr, uint32_t reg) +{ + uint32_t val; + + writel(NRF51_TWI_BASE + NRF51_TWI_REG_ADDRESS, addr); + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STARTTX, 1); + writel(NRF51_TWI_BASE + NRF51_TWI_REG_TXD, reg); + val = readl(NRF51_TWI_BASE + NRF51_TWI_EVENT_TXDSENT); + g_assert_cmpuint(val, ==, 1); + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STOP, 1); + + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STARTRX, 1); + val = readl(NRF51_TWI_BASE + NRF51_TWI_EVENT_RXDREADY); + g_assert_cmpuint(val, ==, 1); + val = readl(NRF51_TWI_BASE + NRF51_TWI_REG_RXD); + writel(NRF51_TWI_BASE + NRF51_TWI_TASK_STOP, 1); + + return val; +} + +static void test_microbit_i2c(void) +{ + uint32_t val; + + /* We don't program pins/irqs but at least enable the device */ + writel(NRF51_TWI_BASE + NRF51_TWI_REG_ENABLE, 5); + + /* MMA8653 magnetometer detection */ + val = i2c_read_byte(0x3A, 0x0D); + g_assert_cmpuint(val, ==, 0x5A); + + val = i2c_read_byte(0x3A, 0x0D); + g_assert_cmpuint(val, ==, 0x5A); + + /* LSM303 accelerometer detection */ + val = i2c_read_byte(0x3C, 0x4F); + g_assert_cmpuint(val, ==, 0x40); + + writel(NRF51_TWI_BASE + NRF51_TWI_REG_ENABLE, 0); +} static void test_nrf51_gpio(void) { @@ -247,6 +290,7 @@ int main(int argc, char **argv) qtest_add_func("/microbit/nrf51/gpio", test_nrf51_gpio); qtest_add_func("/microbit/nrf51/timer", test_nrf51_timer); + qtest_add_func("/microbit/microbit/i2c", test_microbit_i2c); ret = g_test_run(); |