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Reset UART on deinit, reduces power consumption

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This commit is contained in:
Phil Underwood 2023-06-17 22:42:12 +01:00
parent 1f20328068
commit ec1e7a03b3
1 changed files with 7 additions and 0 deletions
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7
ports/nrf/common-hal/busio/UART.c
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@ -266,8 +266,15 @@ bool common_hal_busio_uart_deinited(busio_uart_obj_t *self) {
} }
void common_hal_busio_uart_deinit(busio_uart_obj_t *self) { void common_hal_busio_uart_deinit(busio_uart_obj_t *self) {
volatile uint32_t *power_cycle = (void*)(self->uarte->p_reg) + 0xFFC;
if (!common_hal_busio_uart_deinited(self)) { if (!common_hal_busio_uart_deinited(self)) {
nrfx_uarte_rx_abort(self->uarte);
nrfx_uarte_tx_abort(self->uarte);
nrfx_uarte_uninit(self->uarte); nrfx_uarte_uninit(self->uarte);
// power cycle the peripheral as per https://devzone.nordicsemi.com/f/nordic-q-a/26030/how-to-reach-nrf52840-uarte-current-supply-specification/102605#102605
*power_cycle = 0;
*power_cycle;
*power_cycle = 1;
reset_pin_number(self->tx_pin_number); reset_pin_number(self->tx_pin_number);
reset_pin_number(self->rx_pin_number); reset_pin_number(self->rx_pin_number);
reset_pin_number(self->rts_pin_number); reset_pin_number(self->rts_pin_number);