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6 years, 6 months ago.
Missing one of two channel I2C function on nRF51822
nRf51 I2C class can support 2 channels and works well both two line simultaneous at least mbed rev.114.
I changed to mbed-os then I'm facing a trouble.
It seems 2 channel I2C line can not work correctly.
I made a simple test program as flows(no connection I2C devices).
// mbed Rev.114 Feb.16th,2016 // mbed-os-5.6.3 Oct.24th,2017 #include "mbed.h" DigitalOut SensorPWR(P0_19,1); // my hardware config. I2C i2c0(P0_23, P0_21); I2C i2c1(P0_6, P0_2); int main(void){ char cmd[2]; while(true){ cmd[0] = 0xaa; i2c0.write(0x15, cmd, 1); wait(0.1f); i2c1.write(0x1a, cmd, 1); wait(0.1f); } }
On mbed Rev.114, good as below (Remarks: I2C line, both SDA & SCL are open).
Actually my own program can work with RTC, Pressure sensor, temperature sensor and so on.
On mbed-os-5.6.3, one channel is idle(hardware is same and only program was changed from mbed to mbed-os).
I would like to run same program on mbed-os.
Does someone can fix this trouble?