How to make an RTT CLI Work ?

Question

Hi

I need a CLI over RTT on an existing project. I believe that I have extracted all the required bits from the CLI example. I dont need history, UART, USB or anything else, I dont need built in commands, at the moment I have just one single custom command. I don't need NRF log. I want the simplest solution here. Before I pull all my hair out, I was hoping someone could take a look at my code and tell me what is going on!

static void test(nrf_cli_t const * p_cli, size_t argc, char **argv)
{
	
		SEGGER_RTT_WriteString(0, "test\n");
}

NRF_CLI_CMD_REGISTER(test, NULL, "TestCmd", test);
NRF_CLI_RTT_DEF(m_cli_rtt_transport);
NRF_CLI_DEF(m_cli_rtt, "rtt_cli:~$ ", &m_cli_rtt_transport.transport, '\n', 4);

void main(void)
{
    ret_code_t err_code;
    err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);
    
    err_code = nrf_cli_init(&m_cli_rtt, NULL, true, true, NRF_LOG_SEVERITY_INFO);
    APP_ERROR_CHECK(err_code);
    ret_code_t ret = nrf_cli_start(&m_cli_rtt);
    APP_ERROR_CHECK(ret);
    
    SEGGER_RTT_WriteString(0, "App Started\n");
    
    while(1)
    {
        nrf_cli_process(&m_cli_rtt);
    }
}


}

You'll note my very simple project. In the PUTTY RTT window, I can see the text 'App Started', but there is no prompt, and if I type 'test' nothing happens.

Any ideas??

Thanks, Nigel

My sdkconfig.h has a load of copy/paste thus:

#ifndef NRF_CLI_ENABLED
#define NRF_CLI_ENABLED 1
#endif

#ifndef NRF_CLI_ECHO_STATUS
#define NRF_CLI_ECHO_STATUS 1
#endif

// <o> NRF_CLI_PRINTF_BUFF_SIZE - Maximum print buffer size. 
#ifndef NRF_CLI_PRINTF_BUFF_SIZE
#define NRF_CLI_PRINTF_BUFF_SIZE 23
#endif

// <e> NRFX_CLOCK_ENABLED - nrfx_clock - CLOCK peripheral driver
//==========================================================
#ifndef NRFX_CLOCK_ENABLED
#define NRFX_CLOCK_ENABLED 1
#endif
// <o> NRFX_CLOCK_CONFIG_LF_SRC - LF Clock Source

// <0=> RC 
// <1=> XTAL 
// <2=> Synth 
// <131073=> External Low Swing 
// <196609=> External Full Swing

#ifndef NRFX_CLOCK_CONFIG_LF_SRC
#define NRFX_CLOCK_CONFIG_LF_SRC 1
#endif

// <o> NRFX_CLOCK_CONFIG_IRQ_PRIORITY - Interrupt priority

// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 
// <4=> 4 
// <5=> 5 
// <6=> 6 
// <7=> 7

#ifndef NRFX_CLOCK_CONFIG_IRQ_PRIORITY
#define NRFX_CLOCK_CONFIG_IRQ_PRIORITY 6
#endif

// <o> NRF_CLI_CMD_BUFF_SIZE - Maximum buffer size for a single command. 
#ifndef NRF_CLI_CMD_BUFF_SIZE
#define NRF_CLI_CMD_BUFF_SIZE 128
#endif

// <o> NRF_CLI_ARGC_MAX - Maximum number of parameters passed to the command handler. 
#ifndef NRF_CLI_ARGC_MAX
#define NRF_CLI_ARGC_MAX 12
#endif

#define NRF_CLI_RTT_ENABLED 1

#define NRF_CLOCK_ENABLED 1

#define NRF_CLI_HISTORY_ENABLED 1

// <o> NRF_CLI_HISTORY_ELEMENT_SIZE - Size of one memory object reserved for CLI history. 
#ifndef NRF_CLI_HISTORY_ELEMENT_SIZE
#define NRF_CLI_HISTORY_ELEMENT_SIZE 32
#endif

// <o> NRF_CLI_HISTORY_ELEMENT_COUNT - Number of history memory objects. 
#ifndef NRF_CLI_HISTORY_ELEMENT_COUNT
#define NRF_CLI_HISTORY_ELEMENT_COUNT 8
#endif

#define NRF_CLI_RTT_TERMINAL_ID 0

#define NRF_CLI_RTT_TX_RETRY_CNT 1

#define NRF_CLI_RTT_TX_RETRY_DELAY_MS 1

#define NRF_LOG_BACKEND_SERIAL_USES_RTT 1


// <o> NRFX_CLOCK_CONFIG_IRQ_PRIORITY - Interrupt priority

// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 
// <4=> 4 
// <5=> 5 
// <6=> 6 
// <7=> 7

#ifndef NRFX_CLOCK_CONFIG_IRQ_PRIORITY
#define NRFX_CLOCK_CONFIG_IRQ_PRIORITY 6
#endif