Difference between revisions of "MansOS Radio"
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// Received Signal Strength Indicator (RSSI) of the last received packet
Revision as of 08:34, 31 December 2011
MansOS provides API for Radio communication in physical layer. Platforms without radio modules are also supported, with NULL-radio implementation.
Currently, only one default radio module is supported. When using multiple radio chips on one platform, other radios should be interfaced directly, using chip drivers.
Usage and configuration
Radio support is turned ON by default. It can be disabled by adding the following line to the application config file:
USE_RADIO = n
There are no dependencies for using Radio. However, when using remote reprogramming depends on radio, therefore radio usage is turned on, if remote reprogramming is used.
All platform-independent radio functions are described in mos/hil/radio.h . Implementation can be found under mos/hal/platforms/<platform-name>/radio_hal.h
// Initialize radio, called by the kernel on startup void radioInit() // Turn the radio listening on. Note that listening is not required if radio is used only to send data void radioOn() // Turn the radio listening off (and save energy) void radioOff() // Transmit <len> bytes long data buffer over radio. Radio must be turned on before calling this function! // Returns 0 on success, error code as negative value on failure (see mos/hil/errors.h) int8_t radioSend(const void *data, uint16_t len) // Transmit one byte over radio. Radio must be turned on before calling this function! // Returns 0 on success, error code as negative value on failure (see mos/hil/errors.h) int8_t radioSendByte(uint8_t data) // Write received data into the buffer. It should be called after the radio driver has signaled // data availability. Non-blocking function (does not wait for data to arrive) // Returns received data length on success, error code as negative value on failure (see mos/hil/errors.h) int16_t radioRecv(void *buffer, uint16_t bufferLength) // Similar to radioRecv(), but does not keep the result, just clear radio chip data buffers void radioDiscard() // Set a new radio callback function. // The callback function is called when a packet becomes available. // In general, the callback function should call radioRecv() to read the packet. // Returns: old callback function or NULL RadioRecvFunction radioSetReceiveHandle(RadioRecvFunction functionHandle); // Measure current Received Signal Strength Indicator (RSSI) int radioGetRSSI() // Get Received Signal Strength Indicator (RSSI) of the last received packet int8_t radioGetLastRSSI() // Get Link Quality Indicator (LQI) of the last received packet int8_t radioGetLastLQI()