I use PlatformIO as development platform. I can upload firmware, tried with a Blink-sketch. Developed own firmware for a TTN-Tracker which works fine including the GNSS part. I tried to connect a OLED to the I2C bus on PB7 and PB6 using Wire-Library but no signal on the two pins. Studied your sketches and found that you use Wire-Lib too.
Wrote a test-sketch which use digitalWrite to PB6 and PB7 to see if I can generate some clock like signals and this works perfekt. So the port is not damaged.
But there are no I2C CLK or I2C SDA signals when I use Wire.begin(I2C_SDA,I2C_SCL) and Wire.beginTransmission(adr). Measured with an analyser.
I feel like hw pins are not mapped correct for the AS76G ASIC. Is there any trick to get I2C working?
lyusupov
commented
2 years ago
Hardware
Firmware version
own test firmware
Describe the bug
I use PlatformIO as development platform. I can upload firmware, tried with a Blink-sketch. Developed own firmware for a TTN-Tracker which works fine including the GNSS part. I tried to connect a OLED to the I2C bus on PB7 and PB6 using Wire-Library but no signal on the two pins. Studied your sketches and found that you use Wire-Lib too.
Wrote a test-sketch which use digitalWrite to PB6 and PB7 to see if I can generate some clock like signals and this works perfekt. So the port is not damaged.
But there are no I2C CLK or I2C SDA signals when I use Wire.begin(I2C_SDA,I2C_SCL) and Wire.beginTransmission(adr). Measured with an analyser.
I feel like hw pins are not mapped correct for the AS76G ASIC. Is there any trick to get I2C working?
Thanks!