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/*
* Copyright 2021 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "arch.h"
#include "driver/gpio.h"
#include "driver/stdout.h"
#include "driver/uptime.h"
#include "driver/adc.h"
#include "driver/spi.h"
#define CFG_eu868 1
#define CFG_sx1276_radio 1
#include "radio.h"
#include "oslmic.h"
unsigned char txbuf[4];
unsigned char rxbuf[4];
// DIYMall BSFrance LoRa32u4 II v1.3
// See also: arduino packages/adafruit/hardware/avr/1.4.13/variants/feather32u4/pins_arduino.h
// PB0 -> Charger enable and Vbat/2 measurement voltage divider enable
// PB0 is also the !SS pin, so it must be configured as output in order to use SPI.
// PB5 "D9" <- Vbat/2 via voltage divider. Appears to also have a connection to the user LED
// PC7 "D13" -> User LED
const GPIO::Pin rstpin = GPIO::pd4; // "D4" -> RST
const GPIO::Pin cspin = GPIO::pb4; // "D8" -> NSS
const GPIO::Pin dio0pin = GPIO::pe6; // "D7" <- DIO0 / IRQ
const GPIO::Pin dio1pin = GPIO::pc6; // "D5" <- DIO1
static void writeReg (u1_t addr, u1_t data) {
txbuf[0] = addr | 0x80;
txbuf[1] = data;
gpio.write(cspin, 0);
spi.xmit(2, txbuf, 0, rxbuf);
gpio.write(cspin, 1);
}
static u1_t readReg (u1_t addr) {
txbuf[0] = addr & 0x7f;
gpio.write(cspin, 0);
spi.xmit(1, txbuf, 2, rxbuf);
gpio.write(cspin, 1);
return rxbuf[1];
}
/*
static void writeBuf (u1_t addr, xref2u1_t buf, u1_t len) {
txbuf[0] = addr | 0x80;
for (uint8_t i = 0; i < len; i++) {
txbuf[i+1] = buf[i];
}
spi.xmit(len+1, txbuf, 0, rxbuf);
}
static void readBuf (u1_t addr, xref2u1_t buf, u1_t len) {
txbuf[0] = addr & 0x7f;
spi.xmit(1, txbuf, len, buf);
}
*/
static void writeOpmode(u1_t mode) {
u1_t const maskedMode = mode & OPMODE_MASK;
writeReg(RegOpMode, mode);
}
static void opmode (u1_t mode) {
writeOpmode((readReg(RegOpMode) & ~OPMODE_MASK) | mode);
}
bool radio_init()
{
// requestModuleActive(1); not required for sx yadayada
gpio.output(cspin, 1);
#ifdef CFG_sx1276_radio
gpio.output(rstpin, 0);
#else
gpio.output(rstpin, 1);
#endif
arch.delay_ms(1);
gpio.input(rstpin);
gpio.write(rstpin, 0); // disable pull-up
arch.delay_ms(5);
opmode(OPMODE_SLEEP);
u1_t v = readReg(RegVersion);
#ifdef CFG_sx1276_radio
if(v != 0x12 ) {
kout << "Radio version mismatch: expected " << hex << 0x12 << ", got " << v << endl;
return false;
}
#elif CFG_sx1272_radio
if(v != 0x22) {
kout << "Radio version mismatch: expected " << hex << 0x22 << ", got " << v << endl;
return false;
}
#else
#error Missing CFG_sx1272_radio/CFG_sx1276_radio
#endif
return true;
}
void loop(void)
{
//gpio.led_toggle(1);
#ifdef TIMER_S
kout << dec << uptime.get_s() << endl;
#else
kout << "beep boop" << endl;
#endif
kout << "VCC = " << adc.getVCC_mV() << " mV" << endl;
kout << "Vbat = " << adc.getVBat_mV(false) << " mV" << endl;
gpio.led_toggle(0);
}
int main(void)
{
arch.setup();
gpio.setup();
kout.setup();
spi.setup();
gpio.input(GPIO::pb5);
radio_init();
kout << "Hello, World!" << endl;
kout << "Test, World!" << endl;
arch.idle_loop();
return 0;
}
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