【LPC8N04 Review】2. Development board function introduction and usage

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【LPC8N04 Review】2. Development board function introduction and usage [Copy link]

1. The use of LPC8N04 Development Board is different from others in the power supply part. In addition to USB port power supply, there are 2 battery power supplies and a battery-free power supply method. This design provides more options and increases complexity. 2. The development board is as shown in the figure, The corresponding jumpers and switches are as follows, The more important jumpers are P1 when using an external debugger to connect P2 when connected to enter the automatic firmware upgrade function P7-P9 corresponds to the PIO selection line, as shown in the figure below 3. After powering on, you can use the onboard example 3.1. You need to put S1 in the ON position to power on the NFC tag. At the same time, correctly select the position of P7-P9 to ensure that the PIO is connected to the LED array. 3.2 Download "NXP LPC8N04 NFC Demo." on Google Play 3.3 Power on the development board, and the middle row of LEDs will enter a flashing waiting state. After 100 seconds, it will enter a dormant state and need to be reset with the reset key S3. 3.4 Use a mobile phone with "NXP LPC8N04 NFC Demo." started to approach the NFC tag. The phone will vibrate and display text content, and this text will be displayed in a loop on the LED array of the development board. Select the write button, and the input content will be updated simultaneously on the LED array of the development board. 3.5 When P9 is selected as the onboard speaker, press the user key S2 to start playing 3 built-in songs according to the selected music. The sample program also has the function of energy collection, which can ensure the operation of the NFC tag without external power supply. Considering the comprehensive power supply, the following figure shows the status of the three power sources. 3.6 The pinout of the LED array is in a 5x7 arrangement, so 12 pins are required. 4 This development board is streamlined and easy to develop. It can be used directly as a prototype. Corresponding to LPC8N04, the excellent performance enables NFC to be applied to the following scenarios. NFC tags, NFC read and write, and NFC peer-to-peer transmission functions. As more mobile phones have NFC functions, this development board prompts passively powered proximity tags, which can make IoT designs more promising.