https://github.com/mrcodetastic/esp32s3_spi_dma_tx_seg_loop

Example of SPI Master DMA driven segmented transfers on the ESP32S3
https://github.com/mrcodetastic/esp32s3_spi_dma_tx_seg_loop

esp32-s3 esp32s3 octal-spi segmented-transfer spi

Last synced: 4 months ago
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Example of SPI Master DMA driven segmented transfers on the ESP32S3

• Host: GitHub
• URL: https://github.com/mrcodetastic/esp32s3_spi_dma_tx_seg_loop
• Owner: mrcodetastic
• Created: 2024-07-02T01:08:45.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2024-07-07T08:40:27.000Z (about 1 year ago)
• Last Synced: 2025-02-10T03:32:12.133Z (5 months ago)
• Topics: esp32-s3, esp32s3, octal-spi, segmented-transfer, spi
• Language: C
• Homepage:
• Size: 13.2 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## Overview

This code uses the ESP32S3's SPI (GPSPI2) device to start a half-duplex octal (8 bits in parallel) transmission, sending a 25kByte segment continuously until interrupted.

The transmission can be restarted.

## Logic flow

![image](https://github.com/mrcodetastic/esp32s3_spi_dma_tx_seg_loop/assets/12006953/7ee6f797-2124-484c-b6ed-f23f678bd1c5)

## As seen in Pulseview

The gap between stopping a transmission, waiting for completion (via interrupt) and then restarting is only a few milliseconds.

![image](https://github.com/mrcodetastic/esp32s3_spi_dma_tx_seg_loop/assets/12006953/f69701cb-33b3-4cfb-963a-f1483dc93b91)