Monthly Archives: July 2015

STM32F411RE Nucleo 40MHz SPI with Cypress FM25CL64B FRAM

Previously, I tested a Cypress FRAM memory chip with the Arduino. A feature of FRAM memory is the speed at which it can be accessed. Cypress claims the FM25xxx chips can operate at 40MHz, however the maximum speed for SPI … Continue reading

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LPC81x ARM Cortex-M0 Basics

ARM Cortex-M0+ Architecture Basics Based upon Harvard Architecture, the LPC812 uses an ARM Cortex-M0+ processor. This means it has separate instruction (flash) and data (SRAM) memory. The basic architecture includes the core components and peripherals. The core consists of: Processor … Continue reading

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Arduino Mode0 SPI Bit Bang and Bare Metal Hardware SPI

Here are two additional versions of the SPI program from my previous post. The first of these programs use a “bare-metal” version of hardware SPI. The second is a bit-bang version using different pins. How does the speed compare between … Continue reading

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