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updated setting for GPIO voltage, added code to handle special frequencies

This commit is contained in:
morgan 2015-09-18 18:04:03 -07:00
parent c679bec886
commit a196501f15
1 changed files with 43 additions and 19 deletions
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62
HamShield.cpp
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@ -152,6 +152,10 @@ void HamShield::initialize() {
//set up clock to ues 12-14MHz
setClkMode(1);
// set up GPIO voltage (want 3.3V)
tx_data = 0x03AC; // default is 0x32C
I2Cdev::writeWord(devAddr, 0x09, tx_data);
tx_data = 0x0031;
I2Cdev::writeWord(devAddr, 0x31, tx_data); // included as per AU supplied register table
@ -162,11 +166,14 @@ void HamShield::initialize() {
tx_data = 0x2B87;
I2Cdev::writeWord(devAddr, 0x34, tx_data); // Rx digital gain - included as per AU supplied register table
// bits 6:0 are for digital voice gain
tx_data = 0x470F;
I2Cdev::writeWord(devAddr, 0x41, tx_data); // digital gain for Tx - included as per AU supplied register table
I2Cdev::writeWord(devAddr, 0x41, tx_data);
// bits 11:8 are for voice digital gain after tx ADC downsample
// bits 7:0 are for rx volume control
tx_data = 0x0DFF;
I2Cdev::writeWord(devAddr, A1846S_RX_VOLUME_REG, tx_data);
I2Cdev::writeWord(devAddr, 0x44, tx_data); // addx was A1846S_RX_VOLUME_REG
tx_data = 0x7FFF;
I2Cdev::writeWord(devAddr, 0x47, tx_data);// soft mute
@ -210,7 +217,7 @@ void HamShield::initialize() {
tx_data = 0x1100;
I2Cdev::writeWord(devAddr, 0x15, tx_data); // tuning bit
tx_data = 0x4495;
tx_data = 0x1495; // 4495
I2Cdev::writeWord(devAddr, 0x32, tx_data); // agc target power
tx_data = 0x40C3;
@ -228,7 +235,7 @@ void HamShield::initialize() {
tx_data = 0x0A50;
I2Cdev::writeWord(devAddr, 0x59, tx_data); // Tx FM Deviation
tx_data = 0x1425; //0x0A10;
tx_data = 0x0A10; //use 0x1425 if there's an LNA in line
I2Cdev::writeWord(devAddr, 0x62, tx_data); // Modu_det_thresh (sq setting)
tx_data = 0x2494;
@ -332,6 +339,34 @@ void HamShield::setFrequency(uint32_t freq_khz) {
radio_frequency = freq_khz;
uint32_t freq_raw = freq_khz << 4; // shift by 4 to multiply by 16 (was shift by 3 in old 1846 chip)
// if we're using a 12MHz crystal and the frequency is
// 136.5M,409.5M and 455M, then we have to do special stuff
if (radio_frequency == 136500 ||
radio_frequency == 490500 ||
radio_frequency == 455000) {
// close TX or RX
I2Cdev::readWord(devAddr, 0x00, radio_i2c_buf);
I2Cdev::writeWord(devAddr, 0x30, 0x06);
// set up AU1846 for funky freq
I2Cdev::writeWord(devAddr, 0x05, 0x86D3);
// open TX or RX
I2Cdev::writeWord(devAddr, 0x30, radio_i2c_buf[0]);
} else {
// just undo it regardless of what the last frequency was
// close TX or RX
I2Cdev::readWord(devAddr, 0x00, radio_i2c_buf);
I2Cdev::writeWord(devAddr, 0x30, 0x06);
// set up AU1846 for normal freq
I2Cdev::writeWord(devAddr, 0x05, 0x8763);
// open TX or RX
I2Cdev::writeWord(devAddr, 0x30, radio_i2c_buf[0]);
}
// send top 16 bits to A1846S_FREQ_HI_REG
uint16_t freq_half = (uint16_t) (0x3FFF & (freq_raw >> 16));
I2Cdev::writeWord(devAddr, A1846S_FREQ_HI_REG, freq_half);
@ -460,15 +495,10 @@ void HamShield::setTX(bool on_noff){
if (on_noff) {
setRX(false);
// For RF6886:
// first turn on power
// set RX output off
setGpioHi(4); // remember that RX and TX are active low
// set TX output on
setGpioLow(5); // remember that RX and TX are active low
// then turn on VREG (PWM output)
// then apply RF signal
setRfPower(9); // figure out a good default number (TODO: or don't set a default)
}
I2Cdev::writeBitW(devAddr, A1846S_CTL_REG, A1846S_TX_MODE_BIT, on_noff);
@ -484,7 +514,7 @@ void HamShield::setRX(bool on_noff){
setTX(false);
// set TX output off
setGpioHiZ(5); // remember that RX and TX are active low
setGpioHi(5); // remember that RX and TX are active low
// set RX output on
setGpioLow(4); // remember that RX and TX are active low
}
@ -1023,12 +1053,7 @@ uint16_t HamShield::readDTMFCode(){
void HamShield::setRfPower(uint8_t pwr) {
// using loop reference voltage input to op-amp
// (see RF6886 datasheet)
// 30 is 0.5V, which is ~min loop reference voltage
// 127 is 2.5V, which is ~max loop ref voltage
int max_pwr = 15; //167; // 167 is 3.3*255/5 - 1;
int max_pwr = 15;
if (pwr > max_pwr) {
pwr = max_pwr;
}
@ -1039,8 +1064,7 @@ void HamShield::setRfPower(uint8_t pwr) {
bool HamShield::frequency(uint32_t freq_khz) {
//TODO: there are several "special" frequencies that require extra setup of the AU1846
if((freq_khz >= 137000) && (freq_khz <= 174000)) {
if((freq_khz >= 134000) && (freq_khz <= 174000)) {
setVHF();
//setBand(3); // 0b11 is 134-174MHz
setFrequency(freq_khz);