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nrf/modules/machine/uart: Allow changing the UART baud rate w/o reset.

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This commit fixes a bug in the existing driver, that the UART baud rate
could not be changed without reset or power cycle.  It adds as well
functionality to UART.deinit().

Signed-off-by: robert-hh <robert@hammelrath.com>
This commit is contained in:
robert-hh
2024-08-21 17:35:25 +02:00
committed by Damien George
parent a04a14163b
commit 4da5de94bb
1 changed files with 9 additions and 1 deletions
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10
ports/nrf/modules/machine/uart.c
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@@ -62,6 +62,7 @@ typedef struct _machine_uart_buf_t {
#define nrfx_uart_tx nrfx_uarte_tx #define nrfx_uart_tx nrfx_uarte_tx
#define nrfx_uart_tx_in_progress nrfx_uarte_tx_in_progress #define nrfx_uart_tx_in_progress nrfx_uarte_tx_in_progress
#define nrfx_uart_init nrfx_uarte_init #define nrfx_uart_init nrfx_uarte_init
#define nrfx_uart_uninit nrfx_uarte_uninit
#define nrfx_uart_event_t nrfx_uarte_event_t #define nrfx_uart_event_t nrfx_uarte_event_t
#define NRFX_UART_INSTANCE NRFX_UARTE_INSTANCE #define NRFX_UART_INSTANCE NRFX_UARTE_INSTANCE
@@ -255,7 +256,11 @@ static mp_obj_t mp_machine_uart_make_new(const mp_obj_type_t *type, size_t n_arg
self->buf.rx_ringbuf.iput = 0; self->buf.rx_ringbuf.iput = 0;
// Enable event callback and start asynchronous receive // Enable event callback and start asynchronous receive
if (self->initialized) {
nrfx_uart_uninit(self->p_uart);
}
nrfx_uart_init(self->p_uart, &config, uart_event_handler); nrfx_uart_init(self->p_uart, &config, uart_event_handler);
self->initialized = true;
nrfx_uart_rx(self->p_uart, &self->buf.rx_buf[0], 1); nrfx_uart_rx(self->p_uart, &self->buf.rx_buf[0], 1);
#if NRFX_UART_ENABLED #if NRFX_UART_ENABLED
@@ -266,7 +271,10 @@ static mp_obj_t mp_machine_uart_make_new(const mp_obj_type_t *type, size_t n_arg
} }
static void mp_machine_uart_deinit(machine_uart_obj_t *self) { static void mp_machine_uart_deinit(machine_uart_obj_t *self) {
(void)self; if (self->initialized) {
nrfx_uart_uninit(self->p_uart);
}
self->initialized = false;
} }
// Write a single character on the bus. `data` is an integer to write. // Write a single character on the bus. `data` is an integer to write.