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Recent content by angle9

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    LPC1225 UART0 Receive Problem

    Dear all... I am developing GPS system using LPC1225. Cause, this is new for me, before I used LPC2103, so I test this with simple UART send and receive. Here is the serial init function void SER_init (void) { LPC_IOCON->PIO0_1 = (2UL << 0); LPC_IOCON->PIO0_2 =...
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    SIM700 Battery Charge Problem

    Hi All I face problem with SIM700 battery charge. We use a Li Ion Battery 560 mAh. Charger circuit just follow the datasheet, please see the attachement. Base on datasheet, SIM300 charging system DDLO : Vbat <2.4V, 5 mA charge current UVLO : 2.4V<VBAT<3.2V. 25 mA charge current Fast Charge...
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    SIM700 AT Command Problem and USB Driver

    Hi ckshivaram Thanks for the reply... Sorry I will make clear the problem. All the setting actually is OK. We develop GSM application using this SIM700. During production, we found some SIM700 module CAN NOT POWER ON in our product. But if we check using SIM700 development board, it is OK, no...
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    SIM700 AT Command Problem and USB Driver

    Hi I am developing GPRS application with SIM700 module. I got problem some of module is miss-setting, so i don't know what is its serial setting (baud rate, data, stop bit, parity)? So every time I send AT command the module always reply 0xFF. Anybody can help me? Can we return to original...
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