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nrf/modules/machine/spi: Print SPI baudrate, polarity and phase.

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On most ports, printing an instance of machine.SPI gives something like:

    >>> machine.SPI(1)
    SPI(1, baudrate=328125, polarity=0, phase=0, bits=8)

This commit makes the nrf port do the same.

The reason for this change is:
- make nrf consistent with other ports
- allow the `tests/extmod/machine_spi_rate.py` to run on the nrf port (this
  tests parses the output of str(spi) to get the actual baudrate)

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2025-08-10 22:35:31 +10:00
parent 72867bce1d
commit 03b4c60fc1
1 changed files with 23 additions and 1 deletions
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24
ports/nrf/modules/machine/spi.c
View File

@@ -187,11 +187,33 @@ enum {
ARG_INIT_firstbit
};
static inline uint32_t machine_hard_spi_get_baudrate(const machine_hard_spi_obj_t *self) {
MP_STATIC_ASSERT(NRF_SPI_FREQ_125K == (2 << 24));
MP_STATIC_ASSERT(NRF_SPI_FREQ_250K == (4 << 24));
MP_STATIC_ASSERT(NRF_SPI_FREQ_500K == (8 << 24));
MP_STATIC_ASSERT(NRF_SPI_FREQ_1M == (16 << 24));
MP_STATIC_ASSERT(NRF_SPI_FREQ_2M == (32 << 24));
MP_STATIC_ASSERT(NRF_SPI_FREQ_4M == (64 << 24));
MP_STATIC_ASSERT(NRF_SPI_FREQ_8M == (128 << 24));
#if defined(NRF52840_XXAA) && NRFX_SPIM_ENABLED
if (self->p_config->frequency == NRF_SPIM_FREQ_16M) {
return 16000000;
}
if (self->p_config->frequency == NRF_SPIM_FREQ_32M) {
return 32000000;
}
#endif
return 125000 * (self->p_config->frequency >> 25);
}
static void machine_hard_spi_init_helper(const machine_hard_spi_obj_t *self, mp_arg_val_t *args);
static void machine_hard_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
machine_hard_spi_obj_t *self = self_in;
mp_printf(print, "SPI(%u)", self->p_spi->drv_inst_idx);
unsigned int polarity = self->p_config->mode == NRF_SPI_MODE_0 || self->p_config->mode == NRF_SPI_MODE_1 ? 0 : 1;
unsigned int phase = self->p_config->mode == NRF_SPI_MODE_0 || self->p_config->mode == NRF_SPI_MODE_2 ? 0 : 1;
mp_printf(print, "SPI(%u, baudrate=%u, polarity=%u, phase=%u)",
self->p_spi->drv_inst_idx, machine_hard_spi_get_baudrate(self), polarity, phase);
}
static mp_obj_t machine_hard_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {