SPI - MicroControllersTech

Sep 7 2026

STM32 SPI Winbond W25Q Flash Chip Read/Write

Flash, GPIO, SPI, USART / By johng / September 7, 2026 / 50 minutes of reading

Interface Winbond W25Q QSPI flash chips (Adafruit 5632/5633/5634) with an STM32 in standard SPI mode — read, write, and erase, step by step.

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Jun 9 2026

STM32 SX1262 Encrypted LoRa (Part 6) QA Pass/Fail Suite

Encryption, Interrupt, LoRa, Point-to-Point Communication, SPI, USART / By johng / June 9, 2026 / 16 minutes of reading

Rework the STM32 SX1262 encrypted LoRa QA harness into a pass/fail test suite with per-test verdicts, frame correlation, and a final report.

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Jun 2 2026

STM32 SX1262 Encrypted LoRa (Part 5) Hostile-Frame QA

Encryption, Interrupt, LoRa, Point-to-Point Communication, SPI, USART / By johng / June 2, 2026 / 11 minutes of reading

Complete the STM32 SX1262 encrypted LoRa QA harness with three hostile-frame builders: truncated, length-mismatch, and corrupted-CMAC test frames.

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May 25 2026

STM32 SX1262 Encrypted LoRa (Part 4) Derives Keys with CMAC

Encryption, Interrupt, LoRa, Point-to-Point Communication, SPI, USART / By johng / May 25, 2026 / 12 minutes of reading

Complete the STM32 SX1262 encrypted LoRa security design with a NIST SP 800-108 key derivation function built on AES-CMAC.

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May 18 2026

STM32 SX1262 Encrypted LoRa (Part 3) Verifies with QA Tests

Encryption, Interrupt, LoRa, Point-to-Point Communication, SPI, USART / By johng / May 18, 2026 / 19 minutes of reading

Verify an STM32 SX1262 encrypted LoRa link with a QA harness that injects hostile, malformed, and replayed frames against the real RX path.

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May 13 2026

STM32 SX1262 Encrypted LoRa (Part 2) Authenticates with CMAC

Encryption, Interrupt, LoRa, Point-to-Point Communication, SPI, USART / By johng / May 13, 2026 / 35 minutes of reading

Add AES-CTR encryption, AES-CMAC authentication, and FRAM replay protection to an STM32 SX1262 encrypted LoRa link using the Wire v3 frame format.

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May 7 2026

STM32 SX1262 Encrypted LoRa (Part 1) Secures with AES

Encryption, Interrupt, LoRa, Point-to-Point Communication, SPI, USART / By johng / May 7, 2026 / 19 minutes of reading

Build a secure STM32 SX1262 Encrypted LoRa link using two Nucleo-F439ZI boards using the SX1262 modem and AES. Covers architecture, hardware, and framing.

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RA8875 Driver Board for 40-pin TFT Touch Displays - 800x480 Max

Feb 6 2025

STM32 RA8875 TFT LCD 7 Inch Display Interface

Displays, GPIO, SPI / By johng / February 6, 2025 / 29 minutes of reading

Learn how to interface an STM32 RA8875 TFT LCD 7 inch display over SPI. Covers hardware acceleration, Adafruit library port, and full code examples.

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Jan 3 2025

STM32 SPI Flash W25Q16JV W25Q64JV External Storage Interface

Flash, GPIO, SPI, USART / By johng / January 3, 2025 / 35 minutes of reading

Learn how to use STM32 SPI Flash W25Q16JV and W25Q64JV for external storage. Covers SPI interface, page writes, littleFS, FAT, and full code examples.

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