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nrf52: reset UARTE peripheral in serial_free #11790

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Merged
merged 1 commit into from
Nov 14, 2019
Merged

nrf52: reset UARTE peripheral in serial_free #11790

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15 changes: 15 additions & 0 deletions targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/serial_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1009,6 +1009,21 @@ void serial_free(serial_t *obj)
if (nordic_nrf5_uart_state[instance].usage_counter == 0) {

nrf_uarte_disable(nordic_nrf5_uart_register[instance]);

/* Turn NRF_UARTE0_BASE or NRF_UARTE1_BASE power off and on to reset peripheral. */
if (instance == 0) {
*(volatile uint32_t *)0x40002FFC = 0;
*(volatile uint32_t *)0x40002FFC;
*(volatile uint32_t *)0x40002FFC = 1;
}
#if UART1_ENABLED
else {
*(volatile uint32_t *)0x40028FFC = 0;
*(volatile uint32_t *)0x40028FFC;
*(volatile uint32_t *)0x40028FFC = 1;
}
#endif

}
}
}
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