No TWI connection with s100, Dev Kit and BLE

RE: No TWI connection with s100, Dev Kit and BLE

Susheel Nuguru — Tue, 28 Jul 2015 07:56:28 GMT

Pim, can you please update us with your status? Did you manage to fix your issue?

RE: No TWI connection with s100, Dev Kit and BLE

Alex — Fri, 12 Jun 2015 07:35:15 GMT

It looks like the I2C address you used is wrong. You have to shift it one bit left

// LSM330D I2C address
// Accelerometer = 001100xb
#define LSM330D_A_ADDR0     0x30  // SA0=0(GND)
#define LSM330D_A_ADDR1     0x32  // SA0=1(VDD)

RE: No TWI connection with s100, Dev Kit and BLE

i_am_trying — Thu, 11 Jun 2015 16:08:10 GMT

I'm hoping you wouldn't mind...you're a spot farther with TWI than i am. i am having trouble adding twi to an (example) app. i try both twi_master.h as well as nrf_drv_twi.h..but the build environment (I am using Keil MDK) can't find the files. I add them which adds a slew more of files not found.

Are you using Keil? Could you please share your setup? thank you.

RE: No TWI connection with s100, Dev Kit and BLE

Pim — Thu, 11 Jun 2015 13:59:27 GMT

Alex, I think I did. Default pins according to twi_master_config.h are 24U for Clock Pin and 25U for Data pin. However, on the development board pin 24 is used for the LED so I changed twi_master_config.h to make sure that Clock pin is now 25U and Data pin is 28U. These pins are connected to the LSM. Do I need to change / declare these pins anywhere else?

RE: No TWI connection with s100, Dev Kit and BLE

Alex — Thu, 11 Jun 2015 13:50:01 GMT

Are you sure you defined the same pins for TWI communication as LSM connected on PCB?