App note: I/O emulated UART baud rate calibration

Software/bitbang method of baud rate calibration for micro without built-in UART, App note from Holtek. Link here (PDF) Not every HOLTEK MCU contains a Universal Asynchronous Receiver/Transmitter function, otherwise known as a UART. If this function is required, it can be emulated using software. However, the software accuracy will change according to the system frequency […]

Serial EEPROM bitbang Launchpad interface

Rob from the 43oh blog has posted his method to interface a 24LC32A serial EEPROM interface to the Launchpad. The 24LC32A is a 32Kb PROM with a 2 wire serial interface or I2C compatible, and since it can be clocked @400kHz @3.6V bit banging seemed like it would be easy. External pull up should be […]

Bus Pirate: Binary bitbang mode

See the latest version in the documentation wiki. There’s two new binary I/O libraries in the v2.3 Bus Pirate firmware. Raw bitbang mode provides direct control over the Bus Pirate pins and hardware using a simple single-byte protocol. We discussed the new raw SPI mode yesterday. Hopefully the raw access modes inspire some interesting new […]