Monthly Archives: July 2015

STM32F411RE Nucleo 40MHz SPI with Cypress FM25CL64B FRAM

Posted on July 27, 2015 by Jim Eli

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

Posted on July 2, 2015 by Jim Eli

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

Posted on July 1, 2015 by Jim Eli

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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