Merge pull request #7673 from gamblor21/atmel-spi-tx-len-fix
Fix for long length SPI writes on ATMEL
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commit
4e169bb956
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@ -268,7 +268,14 @@ bool common_hal_busio_spi_write(busio_spi_obj_t *self,
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}
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int32_t status;
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if (len >= 16) {
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status = sercom_dma_write(self->spi_desc.dev.prvt, data, len);
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size_t bytes_remaining = len;
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// Maximum DMA transfer is 65535
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while (bytes_remaining > 0) {
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size_t to_send = (bytes_remaining > 65535) ? 65535 : bytes_remaining;
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status = sercom_dma_write(self->spi_desc.dev.prvt, data + (len - bytes_remaining), to_send);
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bytes_remaining -= to_send;
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}
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} else {
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struct io_descriptor *spi_io;
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spi_m_sync_get_io_descriptor(&self->spi_desc, &spi_io);
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