AN68272 - PSoC® 3, PSoC 4, PSoC 5LP, and PSoC Analog Coprocessor UART Bootloader | Cypress Semiconductor
AN68272 - PSoC® 3, PSoC 4, PSoC 5LP, and PSoC Analog Coprocessor UART Bootloader
AN68272 describes a UART-based bootloader for PSoC® 3, PSoC 4, PSoC 5LP, and PSoC Analog Coprocessor. In this application note, you will learn how to use PSoC Creator™ to quickly and easily build a UART-based bootloader project and bootloadable projects. It also shows how to build a UART-based embedded bootloader host program.
Bootloaders are a common part of an MCU system design. A bootloader makes it possible for a product's firmware to be updated in the field. At the factory, the firmware is initially programmed into a product typically through the MCU's Joint Test Action Group (JTAG) or the ARM serial wire debug (SWD) interface. However, these interfaces are usually not accessible in the field.
This is where bootloading comes in. Bootloading is a process that allows you to upgrade your system firmware over a standard communication interface such as USB, I2C, UART, or SPI. A bootloader communicates with a host to get new application code or data and writes it into the device's flash memory.