kopia lustrzana https://github.com/bertrik/picoballoon
Make it compile with platformio.
Bertrik Sikken
rodzic
84b09eef2c
commit
8ad88e2440
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//RFM22 Lib - edited by James Coxon jacoxon@googlemail.com 2011
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#include "RFM22.h"
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uint8_t rfm22::read(uint8_t addr) const {
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//write ss low to start
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digitalWrite(pin, LOW);
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// make sure the msb is 0 so we do a read, not a write
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addr &= 0x7F;
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SPI.transfer(addr);
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uint8_t val = SPI.transfer(0x00);
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//write ss high to end
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digitalWrite(pin, HIGH);
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return val;
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}
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void rfm22::write(uint8_t addr, uint8_t data) const {
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//write ss low to start
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digitalWrite(pin, LOW);
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// make sure the msb is 1 so we do a write
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addr |= 0x80;
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SPI.transfer(addr);
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SPI.transfer(data);
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//write ss high to end
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digitalWrite(pin, HIGH);
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}
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void rfm22::read(uint8_t start_addr, uint8_t buf[], uint8_t len) {
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//write ss low to start
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digitalWrite(pin, LOW);
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// make sure the msb is 0 so we do a read, not a write
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start_addr &= 0x7F;
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SPI.transfer(start_addr);
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for (int i = 0; i < len; i++) {
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buf[i] = SPI.transfer(0x00);
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}
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//write ss high to end
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digitalWrite(pin, HIGH);
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}
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void rfm22::write(uint8_t start_addr, uint8_t data[], uint8_t len) {
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//write ss low to start
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digitalWrite(pin, LOW);
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// make sure the msb is 1 so we do a write
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start_addr |= 0x80;
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SPI.transfer(start_addr);
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for (int i = 0; i < len; i++) {
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SPI.transfer(data[i]);
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}
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//write ss high to end
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digitalWrite(pin, HIGH);
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}
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void rfm22::resetFIFO() {
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write(0x08, 0x03);
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write(0x08, 0x00);
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}
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// Returns true if centre + (fhch * fhs) is within limits
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// Caution, different versions of the RF22 suport different max freq
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// so YMMV
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boolean rfm22::setFrequency(float centre)
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{
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uint8_t fbsel = 0x40;
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if (centre < 240.0 || centre > 960.0) // 930.0 for early silicon
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return false;
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if (centre >= 480.0)
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{
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centre /= 2;
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fbsel |= 0x20;
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}
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centre /= 10.0;
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float integerPart = floor(centre);
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float fractionalPart = centre - integerPart;
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uint8_t fb = (uint8_t)integerPart - 24; // Range 0 to 23
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fbsel |= fb;
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uint16_t fc = fractionalPart * 64000;
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write(0x73, 0); // REVISIT
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write(0x74, 0);
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write(0x75, fbsel);
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write(0x76, fc >> 8);
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write(0x77, fc & 0xff);
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}
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void rfm22::init() {
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// disable all interrupts
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write(0x06, 0x00);
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// move to ready mode
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write(0x07, 0x01);
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// set crystal oscillator cap to 12.5pf (but I don't know what this means)
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write(0x09, 0x7f);
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// GPIO setup - not using any, like the example from sfi
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// Set GPIO clock output to 2MHz - this is probably not needed, since I am ignoring GPIO...
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write(0x0A, 0x05);//default is 1MHz
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// GPIO 0-2 are ignored, leaving them at default
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write(0x0B, 0x00);
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write(0x0C, 0x00);
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write(0x0D, 0x00);
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// no reading/writing to GPIO
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write(0x0E, 0x00);
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// ADC and temp are off
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write(0x0F, 0x70);
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write(0x10, 0x00);
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write(0x12, 0x00);
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write(0x13, 0x00);
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// no whiting, no manchester encoding, data rate will be under 30kbps
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// subject to change - don't I want these features turned on?
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write(0x70, 0x20);
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// RX Modem settings (not, apparently, IF Filter?)
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// filset= 0b0100 or 0b1101
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// fuck it, going with 3e-club.ru's settings
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write(0x1C, 0x04);
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write(0x1D, 0x40);//"battery voltage" my ass
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write(0x1E, 0x08);//apparently my device's default
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// Clock recovery - straight from 3e-club.ru with no understanding
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write(0x20, 0x41);
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write(0x21, 0x60);
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write(0x22, 0x27);
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write(0x23, 0x52);
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// Clock recovery timing
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write(0x24, 0x00);
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write(0x25, 0x06);
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// Tx power to max
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write(0x6D, 0x04);//or is it 0x03?
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// Tx data rate (1, 0) - these are the same in both examples
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write(0x6E, 0x27);
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write(0x6F, 0x52);
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// "Data Access Control"
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// Enable CRC
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// Enable "Packet TX Handling" (wrap up data in packets for bigger chunks, but more reliable delivery)
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// Enable "Packet RX Handling"
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write(0x30, 0x8C);
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// "Header Control" - appears to be a sort of 'Who did i mean this message for'
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// we are opting for broadcast
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write(0x32, 0xFF);
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// "Header 3, 2, 1, 0 used for head length, fixed packet length, synchronize word length 3, 2,"
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// Fixed packet length is off, meaning packet length is part of the data stream
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write(0x33, 0x42);
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// "64 nibble = 32 byte preamble" - write this many sets of 1010 before starting real data. NOTE THE LACK OF '0x'
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write(0x34, 64);
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// "0x35 need to detect 20bit preamble" - not sure why, but this needs to match the preceeding register
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write(0x35, 0x20);
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// synchronize word - apparently we only set this once?
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write(0x36, 0x2D);
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write(0x37, 0xD4);
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write(0x38, 0x00);
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write(0x39, 0x00);
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// 4 bytes in header to send (note that these appear to go out backward?)
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write(0x3A, 's');
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write(0x3B, 'o');
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write(0x3C, 'n');
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write(0x3D, 'g');
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// Packets will have 1 bytes of real data
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write(0x3E, 1);
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// 4 bytes in header to recieve and check
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write(0x3F, 's');
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write(0x40, 'o');
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write(0x41, 'n');
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write(0x42, 'g');
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// Check all bits of all 4 bytes of the check header
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write(0x43, 0xFF);
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write(0x44, 0xFF);
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write(0x45, 0xFF);
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write(0x46, 0xFF);
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//No channel hopping enabled
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write(0x79, 0x00);
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write(0x7A, 0x00);
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// FSK, fd[8]=0, no invert for TX/RX data, FIFO mode, no clock
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write(0x71, 0x22);
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// "Frequency deviation setting to 45K=72*625"
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write(0x72, 0x48);
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// "No Frequency Offet" - channels?
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write(0x73, 0x00);
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write(0x74, 0x00);
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// "frequency set to 434MHz" board default
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write(0x75, 0x53);
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write(0x76, 0x64);
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write(0x77, 0x00);
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resetFIFO();
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}
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void rfm22::initSPI() {
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SPI.begin();
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// RFM22 seems to speak spi mode 0
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SPI.setDataMode(SPI_MODE0);
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// Setting clock speed to 8mhz, as 10 is the max for the rfm22
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SPI.setClockDivider(SPI_CLOCK_DIV2);
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// MSB first
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//SPI.setBitOrder(MSBFIRST);
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}
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@ -0,0 +1,47 @@
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#ifndef rfm22_h
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#define rfm22_h
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#include <SPI.h>
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#define RFM_INT_FFERR (1 << 16)
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#define RFM_INT_TXFFAFULL (1 << 14)
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#define RFM_INT_XTFFAEM (1 << 13)
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#define RFM_INT_RXFFAFULL (1 << 12)
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#define RFM_INT_EXT (1 << 11)
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#define RFM_INT_PKSENT (1 << 10)
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#define RFM_INT_PKVALID (1 << 9)
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#define RFM_INT_CRERROR (1 << 8)
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#define RFM_INT_SWDET (1 << 7)
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#define RFM_INT_PREAVAL (1 << 6)
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#define RFM_INT_PREAINVAL (1 << 5)
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#define RFM_INT_RSSI (1 << 4)
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#define RFM_INT_WUT (1 << 3)
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#define RFM_INT_LBD (1 << 2)
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#define RFM_INT_CHIPRDY (1 << 1)
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#define RFM_INT_POR (1)
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class rfm22
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{
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int pin;
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public:
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rfm22(uint8_t pin) : pin(pin)
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{
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pinMode(pin, OUTPUT);
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digitalWrite(pin, HIGH);
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}
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uint8_t read(uint8_t addr) const;
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void write(uint8_t addr, uint8_t data) const;
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void read(uint8_t start_addr, uint8_t buf[], uint8_t len);
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void write(uint8_t start_addr, uint8_t data[], uint8_t len);
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void resetFIFO();
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boolean setFrequency(float centre);
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void init();
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static void initSPI();
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};
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#endif
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@ -0,0 +1,21 @@
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; PlatformIO Project Configuration File
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;
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; Build options: build flags, source filter
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; Upload options: custom upload port, speed and extra flags
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; Library options: dependencies, extra library storages
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; Advanced options: extra scripting
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;
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; Please visit documentation for the other options and examples
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; http://docs.platformio.org/page/projectconf.html
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[platformio]
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src_dir = .
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[env:default]
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platform = atmelavr
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board = pro8MHzatmega328
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framework = arduino
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monitor_speed = 9600
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lib_deps =
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TinyGPS
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