diff options
| -rw-r--r-- | ports/stm32/machine_i2s.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/ports/stm32/machine_i2s.c b/ports/stm32/machine_i2s.c index 0bb0f3e8f..2120554c3 100644 --- a/ports/stm32/machine_i2s.c +++ b/ports/stm32/machine_i2s.c @@ -887,24 +887,26 @@ STATIC mp_obj_t machine_i2s_init(size_t n_pos_args, const mp_obj_t *pos_args, mp STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_i2s_init_obj, 1, machine_i2s_init); STATIC mp_obj_t machine_i2s_deinit(mp_obj_t self_in) { - machine_i2s_obj_t *self = MP_OBJ_TO_PTR(self_in); - dma_deinit(self->dma_descr_tx); - dma_deinit(self->dma_descr_rx); - HAL_I2S_DeInit(&self->hi2s); - - if (self->hi2s.Instance == I2S1) { - __SPI1_FORCE_RESET(); - __SPI1_RELEASE_RESET(); - __SPI1_CLK_DISABLE(); - } else if (self->hi2s.Instance == I2S2) { - __SPI2_FORCE_RESET(); - __SPI2_RELEASE_RESET(); - __SPI2_CLK_DISABLE(); - } + if (self->ring_buffer_storage != NULL) { + dma_deinit(self->dma_descr_tx); + dma_deinit(self->dma_descr_rx); + HAL_I2S_DeInit(&self->hi2s); + + if (self->hi2s.Instance == I2S1) { + __SPI1_FORCE_RESET(); + __SPI1_RELEASE_RESET(); + __SPI1_CLK_DISABLE(); + } else if (self->hi2s.Instance == I2S2) { + __SPI2_FORCE_RESET(); + __SPI2_RELEASE_RESET(); + __SPI2_CLK_DISABLE(); + } - m_free(self->ring_buffer_storage); + m_free(self->ring_buffer_storage); + self->ring_buffer_storage = NULL; + } return mp_const_none; } |