Porting ble_app_uart into twi_master_with_slave

RE: Porting ble_app_uart into twi_master_with_slave

Susheel Nuguru — Wed, 20 Jan 2016 08:14:57 GMT

Thank you for updating this thread.

RE: Porting ble_app_uart into twi_master_with_slave

JudePinto — Wed, 20 Jan 2016 01:13:42 GMT

To anyone curious about a solution: devzone.nordicsemi.com/.../

That thread decribes the start position and size of RAM/ROM in the Options for Target ------> Target.

I ported code into the ble_app_uart that was originally a peripheral example, in order to utilize I2C/TWI functionality. For the peripheral examples, the RAM starts at 0x0, which is not compatible with the ble_app_uart, because the softdevice needs to be flashed first and takes up space from 0x0.

RAM settings for the application need to be changed so the device flashes starting at a larger value to leave space for the softdevice.

RE: Porting ble_app_uart into twi_master_with_slave

JudePinto — Wed, 20 Jan 2016 01:08:00 GMT

Please see my answer below

RE: Porting ble_app_uart into twi_master_with_slave

Susheel Nuguru — Tue, 19 Jan 2016 22:06:45 GMT

It would be perfect if you can update this thread once you get an answer from the portal..Good Luck

RE: Porting ble_app_uart into twi_master_with_slave

JudePinto — Tue, 19 Jan 2016 21:53:38 GMT

Aryan, I still need help with this request, so I submitted it through the support portal. I did not want to duplicate the work for the nordic support staff, so I deleted this thread. Is that okay?

RE: Porting ble_app_uart into twi_master_with_slave

Susheel Nuguru — Tue, 19 Jan 2016 21:31:07 GMT

Judepinto24, Please do not delete the thread with many comments. It will be useful for others to see your discussion. Did you mean to mark it as completed?

RE: Porting ble_app_uart into twi_master_with_slave

JudePinto — Tue, 19 Jan 2016 03:55:43 GMT

Okay, I took what you said and used a debugger. The code stops working at ble_stack_init(). It does not get to err_code. Also, sorry, here is the full code.

int main(void)
{
	uart_config(); 

	printf("\nTWI Sensor Example\r\n");
	//BT
	uint32_t err_code;
	bool erase_bonds;
	uint8_t buffer[BLE_NUS_MAX_DATA_LEN] = {0};
	twi_init(); //not BT
	printf("TWI");
	MC3610 MC; //not BT
	MC.start(); //not BT

	// Initialize.
	APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);
	buttons_leds_init(&erase_bonds);
	ble_stack_init();
	gap_params_init();
	services_init();
	advertising_init();
	conn_params_init();
	err_code = ble_advertising_start(BLE_ADV_MODE_FAST);
	APP_ERROR_CHECK(err_code);
	//BT end

	#ifdef TEST_MODE //TEST_MODE must be defined in the options for IDE
	jazz_unit_test_mcube();
	#endif

	while(1) {
		mc3610_acc_t rawData = MC.readRawAccel();
		printf("%*.4f,%*.4f,%*.4f\r\n",6,rawData.XAxis_g,6,rawData.YAxis_g,6,rawData.ZAxis_g); 
		sprintf((char*)buffer,"%.4f,%.4f,%.4f\r\n", rawData.XAxis_g, rawData.YAxis_g, rawData.ZAxis_g);
		
		if(m_conn_handle != BLE_CONN_HANDLE_INVALID)
		{
			err_code = ble_nus_string_send(&m_nus, buffer, sizeof(buffer));
			if (err_code != NRF_ERROR_INVALID_STATE)
			{
				APP_ERROR_CHECK(err_code);
			}
		}

		power_manage(); //puts it in sleep mode. can be woken with interrupt

		nrf_delay_ms(10);

	}
}

RE: Porting ble_app_uart into twi_master_with_slave

RK — Tue, 19 Jan 2016 02:07:31 GMT

well you should have something to stop main() just exiting. Currently you start advertising and if that's your real code, as soon as that's done, you're off the end of main and depending on what you're building with you could run into a loop, which would work, or a load of shutdown code, which wouldn't.

If you have an infinite loop elsewhere then either

You're in it already - ie does twi_init() start the infinite loop, in which case you're never going to get to the rest of the code or
Your infinite loop is triggered later by a timer or connection and you've already left main() before you get there.

just putting while(1) __wfe() at the end of main is a good idea.

If you have a debugger, use it. If you don't, then you're just going to have to start commenting things out piece by piece until you find out where you are. I never know why people debug with UART, too hard.

RE: Porting ble_app_uart into twi_master_with_slave

JudePinto — Tue, 19 Jan 2016 01:57:10 GMT

hello,

I do have a infinite while loop where I am taking data. I removed power manage, because I am not using interrupts to wake the device up every time I get a sample from the sensor. Is power manage absolutely necessary?

2/3. I have been debugging through UART. Since UART messages are not working, I cannot see the err_code value.

RE: Porting ble_app_uart into twi_master_with_slave

RK — Tue, 19 Jan 2016 01:01:38 GMT

well for a start - there's no infinite loop at the end of that main() routine. Usually you'd have

while( 1 )
    power_manage()

or _wfe() or similar

Secondly - are you even getting to ble_advertising_start(), use the debugger.

Thirdly- what is err_code at the end, is it zero or are you just going to the error handler.