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89 lines
2.6 KiB
89 lines
2.6 KiB
4 months ago
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# Radxa Rock Pi 4 C+
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Enige werkende build: https://wiki.radxa.com/Rockpi4/downloads Debian 10 desktop link waar zowel X als audio in werkt... zie https://wiki.radxa.com/Rockpi4/Debian
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Login: rock/rock. SSH @ 22 enabled. Wifi zelf te doen met `nmcli r wifi on`
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GPIO interface: https://wiki.radxa.com/Rock4/hardware/gpio
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CPU/GPU temp check: `cat /sys/class/thermal/thermal_zone[0/1]/temp` (0 = CPU, 1 = GPU) => gaat al snel naar 73+ bij Chromium streaming!!
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## Audio
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Audio jack out no sound probleem: https://github.com/MichaIng/DietPi/issues/5941 via alsamixer:
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1. `F6` (change sound card), select Rockchip RK809 codec
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2. Playback path: op `HP` zetten ipv `SPK` of `RCV`
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Werkt niet voor Chromium-based geluid? => open Volume Control, selecteer "Built-in Audio Stereo" (2de optie! labels verkeerdelijk hetzelfde in officiële Debian build?)
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## FM Transmitter
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Met Official Pi: https://learn.adafruit.com/adafruit-si4713-fm-radio-transmitter-with-rds-rdbs-support/python-circuitpython
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Doorgemeten: pin 3v0 probleem? (ongebruikt). Oscilloscope: OK, 7 bits komen door?
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### I2c detectie?
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https://stackoverflow.com/questions/72720629/adafruit-with-rockpi-4
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`mraa-i2c detect 0` (i2c7: pin 03/05; zie `mraa-gpio list`) (geeft geen output?)
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https://wiki.radxa.com/Rockpi4/dev/libmraa => ook nog aan zetten in `/boot/hw_initfc.conf`!!
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Testen met `sudo mraa-i2c set 0 0x50 0x10 0x55` (bus 0, adres `0x50`, reg `0x10`, value `0x55`) - zelfde als iets wegschrijven naar `/dev/i2c-0`? Zie Go impl https://github.com/d2r2/go-i2c/blob/master/i2c.go
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**Detectie** met `detect 0` (bus 0) werkt soms (return `0x63`), soms niet? Waarom?
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- Slecht gesoldeerd?
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- Rock 3399 I2C chip niet stabiel?
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- Kernel driver niet tegoei?
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### CircuitPython probleem
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- "Board not supported ROCK_PI_4C_" in site-packages/board.py toegevoegd
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- Microcontroller not supported: "RK3399 T" in site-packages/microcontroller/pin.py
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### Transmitter reset
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fm transmitter adafruit: eerst reset high/low/high op pin zetten??? https://forums.adafruit.com/viewtopic.php?t=160242
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```
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#define RSTPIN 12
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const int8_t RESETPIN = 12;
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const uint16_t FMSTATION = 10300;
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const uint8_t FMPOWER = 115;
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const uint8_t I2CADDRESS = 0x63; // if cs=0 address is 0x11
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Adafruit_Si4713 radio;
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boolean radioFound;
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int capacitor;
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uint8_t power;
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void setup() {
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pinMode(RSTPIN, OUTPUT);
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digitalWrite(RSTPIN, HIGH);
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Wire.begin();
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delay(20);
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reset_tx();
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delay(20);
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start_tx();
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delay(20);
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}
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void loop(){
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void reset_tx(){
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digitalWrite(RSTPIN, HIGH);
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delay(50);
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digitalWrite(RSTPIN, LOW);
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delay(50);
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digitalWrite(RSTPIN, HIGH);
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delay(50);
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```
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Dit heeft het probleem opgelost!
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