diff options
| -rw-r--r-- | ports/nrf/common-hal/busio/SPI.c | 58 |
1 files changed, 49 insertions, 9 deletions
diff --git a/ports/nrf/common-hal/busio/SPI.c b/ports/nrf/common-hal/busio/SPI.c index d826bc026..10974c4c5 100644 --- a/ports/nrf/common-hal/busio/SPI.c +++ b/ports/nrf/common-hal/busio/SPI.c @@ -33,6 +33,8 @@ #define INST_NO 2 #endif +#define MAX_XFER_SIZE ((1U << NRFX_CONCAT_3(SPIM, INST_NO, _EASYDMA_MAXCNT_SIZE)) - 1) + // Convert frequency to clock-speed-dependent value static nrf_spim_frequency_t baudrate_to_spim_frequency(const uint32_t baudrate) { if (baudrate <= 125000) @@ -152,30 +154,68 @@ bool common_hal_busio_spi_write(busio_spi_obj_t *self, const uint8_t *data, size if (len == 0) return true; - const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_XFER_TX(data, len); - const nrfx_err_t err = nrfx_spim_xfer(&self->spim, &xfer, 0); + const uint32_t parts = len / MAX_XFER_SIZE; + const uint32_t remainder = len % MAX_XFER_SIZE; + + for (uint32_t i = 0; i < parts; ++i) { + const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_XFER_TX(data + i * MAX_XFER_SIZE, MAX_XFER_SIZE); + if (nrfx_spim_xfer(&self->spim, &xfer, 0) != NRFX_SUCCESS) + return false; + } - return (err == NRFX_SUCCESS); + if (remainder > 0) { + const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_XFER_TX(data + parts * MAX_XFER_SIZE, remainder); + if (nrfx_spim_xfer(&self->spim, &xfer, 0) != NRFX_SUCCESS) + return false; + } + + return true; } bool common_hal_busio_spi_read(busio_spi_obj_t *self, uint8_t *data, size_t len, uint8_t write_value) { if (len == 0) return true; - const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_XFER_RX(data, len); - const nrfx_err_t err = nrfx_spim_xfer(&self->spim, &xfer, 0); + const uint32_t parts = len / MAX_XFER_SIZE; + const uint32_t remainder = len % MAX_XFER_SIZE; + + for (uint32_t i = 0; i < parts; ++i) { + const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_XFER_RX(data + i * MAX_XFER_SIZE, MAX_XFER_SIZE); + if (nrfx_spim_xfer(&self->spim, &xfer, 0) != NRFX_SUCCESS) + return false; + } - return (err == NRFX_SUCCESS); + if (remainder > 0) { + const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_XFER_RX(data + parts * MAX_XFER_SIZE, remainder); + if (nrfx_spim_xfer(&self->spim, &xfer, 0) != NRFX_SUCCESS) + return false; + } + + return true; } bool common_hal_busio_spi_transfer(busio_spi_obj_t *self, uint8_t *data_out, uint8_t *data_in, size_t len) { if (len == 0) return true; - const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_SINGLE_XFER(data_out, len, data_in, len); - const nrfx_err_t err = nrfx_spim_xfer(&self->spim, &xfer, 0); + const uint32_t parts = len / MAX_XFER_SIZE; + const uint32_t remainder = len % MAX_XFER_SIZE; + + for (uint32_t i = 0; i < parts; ++i) { + const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_SINGLE_XFER(data_out + i * MAX_XFER_SIZE, MAX_XFER_SIZE, + data_in + i * MAX_XFER_SIZE, MAX_XFER_SIZE); + if (nrfx_spim_xfer(&self->spim, &xfer, 0) != NRFX_SUCCESS) + return false; + } + + if (remainder > 0) { + const nrfx_spim_xfer_desc_t xfer = NRFX_SPIM_SINGLE_XFER(data_out + parts * MAX_XFER_SIZE, remainder, + data_in + parts * MAX_XFER_SIZE, remainder); + if (nrfx_spim_xfer(&self->spim, &xfer, 0) != NRFX_SUCCESS) + return false; + } - return (err == NRFX_SUCCESS); + return true; } uint32_t common_hal_busio_spi_get_frequency(busio_spi_obj_t* self) { |