to first give you broad idea what I'm going for, my plan is to do the following:
- link one TCA9548A to each of the two i2c ports of the maple mini (pins PB6/7 and PB11/10 according to the pinout)
- add 8 VL53L0X linear lidars to the first one
- add 4 US42-V2 sonars to the second one
- read them all sequentially and send the results via serial
Code: Select all
import smbus
import time
i2cbus = smbus.SMBus(1)
address = 0x70
i2cbus.write_byte(address, 0x51)
time.sleep(0.12)
val = i2cbus.read_word_data(address, 0xe1)
print (val >> 8) & 0xff | (val & 0xff), 'cm'Code: Select all
#include<Wire.h>
#define US42 0x70
void write_byte(int dev_addr, byte addr){
Wire.beginTransmission(dev_addr);
Wire.write(addr);
Wire.endTransmission();
}
int read_word_data(int dev_addr, byte number){
Wire.requestFrom(dev_addr, number);
while(Wire.available() == 0);
return Wire.read();
}
void setup() {
I2C1->sda_pin = PB7;
I2C1->scl_pin = PB6;
Wire.begin();
}
void loop() {
write_byte(US42, 0x51);
delay(120);
int val = read_word_data(US42,2);
val = (val >> 8) & 0xff | (val & 0xff);
Serial.write(val);
}So my question is, how to properly set up both of the i2c busses for usage at the same time (why do we have two of them otherwise eh?), and before that - how to even get one working properly in the first place.
Thanks!
