Ingenic Semiconductor Jz4740
The Jz4740 is a MIPS XBurst CPU chip made by the Chinese company Ingenic Semiconductor that is a popular choice for MP4 players. Our client had used this chipset in a point of sale, touch screen device for the selection of fast foods. ICS became involved with this effort when our client asked us to debug failures generated by the quick selection of multiple options via the touch screen. We successfully isolated and eliminated the problem by rewriting the handling of serial I/O communication using the open source QextSerialPort class. Subsequently, we have expanded the functionality of this device to include field updates.