config AX12
Fork of configure_ax12_test_bras_module by
mbed/SPISlave.h
- Committer:
- clementlignie
- Date:
- 2017-02-01
- Revision:
- 2:91b6646ea994
- Parent:
- 0:c03cffe402df
File content as of revision 2:91b6646ea994:
/* mbed Microcontroller Library - SPISlave * Copyright (c) 2010-2011 ARM Limited. All rights reserved. */ #ifndef MBED_SPISLAVE_H #define MBED_SPISLAVE_H #include "device.h" #if DEVICE_SPISLAVE #include "platform.h" #include "PinNames.h" #include "PeripheralNames.h" #include "Base.h" namespace mbed { /* Class: SPISlave * A SPI slave, used for communicating with a SPI Master device * * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz * * Example: * > // Reply to a SPI master as slave * > * > #include "mbed.h" * > * > SPISlave device(p5, p6, p7, p8); // mosi, miso, sclk, ssel * > * > int main() { * > device.reply(0x00); // Prime SPI with first reply * > while(1) { * > if(device.receive()) { * > int v = device.read(); // Read byte from master * > v = (v + 1) % 0x100; // Add one to it, modulo 256 * > device.reply(v); // Make this the next reply * > } * > } * > } */ class SPISlave : public Base { public: /* Constructor: SPI * Create a SPI slave connected to the specified pins * * Variables: * mosi - SPI Master Out, Slave In pin * miso - SPI Master In, Slave Out pin * sclk - SPI Clock pin * ssel - SPI chip select pin * name - (optional) A string to identify the object * * Pin Options: * (5, 6, 7i, 8) or (11, 12, 13, 14) * * mosi or miso can be specfied as NC if not used */ SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel, const char *name = NULL); /* Function: format * Configure the data transmission format * * Variables: * bits - Number of bits per SPI frame (4 - 16) * mode - Clock polarity and phase mode (0 - 3) * * > mode | POL PHA * > -----+-------- * > 0 | 0 0 * > 1 | 0 1 * > 2 | 1 0 * > 3 | 1 1 */ void format(int bits, int mode = 0); /* Function: frequency * Set the spi bus clock frequency * * Variables: * hz - SCLK frequency in hz (default = 1MHz) */ void frequency(int hz = 1000000); /* Function: receive * Polls the SPI to see if data has been received * * Variables: * returns - zero if no data, 1 otherwise */ int receive(void); /* Function: read * Retrieve data from receive buffer as slave * * Variables: * returns - the data in the receive buffer */ int read(void); /* Function: reply * Fill the transmission buffer with the value to be written out * as slave on the next received message from the master. * * Variables: * value - the data to be transmitted next */ void reply(int value); protected: SPIName _spi; int _bits; int _mode; int _hz; }; } // namespace mbed #endif #endif