Hello all: I have interfaced a CC1101 radio and a serial GPS module to a MSP430F2611 microcontroller (custom design). The radio is connected to Port B0 (SPI with ENABLE_SPI0_DMA set) and the GPS to Port A0 (UART, 4800 baud). Everything works fine until I increase the number of nodes in a multi-hop network. Then, nodes will start to lock up, usually after a topology change. I believe the lockup is caused due to the way interrupts from the radio and GPS are being handled (after a topology change, network traffic increases causing an increasing number of radio interrupts; the problem also disappears if I disable UART interrupts).
Unfortunately, this issue is beyond my understanding of TinyOS. Can anyone shed some light on what might be happening? Thanks for any help, Anand
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