topic How to control UART0 with no printf or semiHosting in MCUXpresso General

How to control UART0 with no printf or semiHosting

claeskjellstrom — Tue, 08 Jan 2019 16:57:06 GMT

Regarding UART0 and how to control it in MCUXpresso IDE

Using MKE04, and both UART0 and UART1, UART1 is working but can't control UART0.

Preprocessor:

__REDLIB__
SDK_OS_BAREMETAL
FSL_RTOS_BM
SDK_DEBUGCONSOLE=0
CR_INTEGER_PRINTF
PRINTF_FLOAT_ENABLE=0
CPU_MKE04Z64VLD4
CPU_MKE04Z64VLD4_cm0plus
__MCUXPRESSO
__USE_CMSIS
DEBUG

I have attached a screendump from the project.

Any sugesstions ?

/Claes

Re: How to control UART0 with no printf or semiHosting

danielchen — Thu, 10 Jan 2019 08:05:53 GMT

Hi claes

If you do not need printf or semihosting, please change the SDK debug console from semihost console to UART console.

Quick settings -> SDK Debug Console -> UART console

Have a great day,
Daniel

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Re: How to control UART0 with no printf or semiHosting

claeskjellstrom — Mon, 14 Jan 2019 17:31:07 GMT

Hi Daniel,

From what I can see now the situation is like this:

using redlib(none), initiating UART0 and UART1, I can control UART1 , regarding

UART0 I can read a char from UART0->D, but I can't send anything on Tx, I have checked that Tx and Rx are active.

/* UART0&1 init */
SIM->SCGC |= SIM_SCGC_UART0_MASK;
SIM->SCGC |= SIM_SCGC_UART1_MASK;

uart_config_t uart_config;
uart_config.baudRate_Bps = 19200U;
uart_config.parityMode = kUART_ParityDisabled;
uart_config.stopBitCount = kUART_OneStopBit;
uart_config.enableRx = true;
uart_config.enableTx = true;

UART_Init(UART0, &uart_config, 20000000U);
UART_Init(UART1, &uart_config, 20000000U);

When compiling for release I use None (-O0) and debug level(none) etc.......

When I simply changed through "quick setting" and UART Consol, the code size just increased but still same problem with UART0

From the pin_mux.c you can see

/* pin 23,24 is configured as UART0_TX, UART0_RX */
PORT_SetPinSelect(kPORT_UART0, kPORT_UART0_RXPTB0_TXPTB1);
/* pin 36,37 is configured as UART1_TX, UART1_RX */
PORT_SetPinSelect(kPORT_UART1, kPORT_UART1_RXPTC7_TXPTC6);
/* pin 43 is configured as RESET_b */
PORT_SetPinSelect(kPORT_RESET, kPORT_RST_RSTPE);
/* pin 44,42 is configured as SWD_DIO, SWD_CLK */
PORT_SetPinSelect(kPORT_SWDE, kPORT_SWDE_SWDE);

SIM->SOPT0 = ((SIM->SOPT0 &
/* Mask bits to zero which are setting */
(~(SIM_SOPT0_RXDFE_MASK | SIM_SOPT0_CLKOE_MASK)))

/* UART0 RxD Filter Select: 0x00u. */
| SIM_SOPT0_RXDFE(0x00u)

/* Bus Clock Output Enable: 0x00u. */
| SIM_SOPT0_CLKOE(0x00u));

Any other Ideas ??

Regards

Claes

Re: How to control UART0 with no printf or semiHosting

danielchen — Thu, 28 Feb 2019 06:47:00 GMT

HI Claes

I would suggest you refer to below link for information about printing with semihosting and printing with UART terminal

https://community.nxp.com/docs/DOC-334074

Regards

Daniel