embox

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/**
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 * @file
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 * @brief
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 *
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 * @author  Anton Kozlov
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 * @date    25.03.2014
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 */
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/***************************************************************************//**
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 * @file
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 * @brief Provide BSP (board support package) configuration parameters.
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 * @author Energy Micro AS
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 * @version 3.20.3
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 *******************************************************************************
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 * @section License
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 * <b>(C) Copyright 2013 Energy Micro AS, http://www.energymicro.com</b>
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 *******************************************************************************
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 *
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 * Permission is granted to anyone to use this software for any purpose,
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 * including commercial applications, and to alter it and redistribute it
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 * freely, subject to the following restrictions:
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 *
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 * 1. The origin of this software must not be misrepresented; you must not
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 *    claim that you wrote the original software.
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 * 2. Altered source versions must be plainly marked as such, and must not be
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 *    misrepresented as being the original software.
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 * 3. This notice may not be removed or altered from any source distribution.
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 * 4. The source and compiled code may only be used on Energy Micro "EFM32"
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 *    microcontrollers and "EFR4" radios.
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 *
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 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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 * obligation to support this Software. Energy Micro AS is providing the
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 * Software "AS IS", with no express or implied warranties of any kind,
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 * including, but not limited to, any implied warranties of merchantability
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 * or fitness for any particular purpose or warranties against infringement
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 * of any proprietary rights of a third party.
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 *
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 * Energy Micro AS will not be liable for any consequential, incidental, or
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 * special damages, or any other relief, or for any claim by any third party,
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 * arising from your use of this Software.
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 *
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 *****************************************************************************/
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#include <stdint.h>
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/*#include <drivers/gpio.h>*/
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#include <hal/reg.h>
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#include <hal/system.h>
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#include <drivers/diag.h>
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#include <drivers/serial/diag_serial.h>
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#include <embox/unit.h>
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#include <drivers/serial/uart_dev.h>
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#include <em_leuart.h>
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#include <em_cmu.h>
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#include <em_gpio.h>
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#define BSP_BCC_LEUART        LEUART0
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#define BSP_BCC_CLK           cmuClock_LEUART0
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#define BSP_BCC_LOCATION      LEUART_ROUTE_LOCATION_LOC0
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#define BSP_BCC_TXPORT        gpioPortD
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#define BSP_BCC_TXPIN         4
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#define BSP_BCC_RXPORT        gpioPortD
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#define BSP_BCC_RXPIN         5
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#define BSP_BCC_ENABLE_PORT   gpioPortA
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#define BSP_BCC_ENABLE_PIN    9
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static int efm32_uart_putc(struct uart *dev, int ch) {
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	LEUART_Tx((void *) dev->base_addr, ch);
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	return 0;
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}
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static int efm32_uart_hasrx(struct uart *dev) {
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#if 1
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static unsigned int neg_cnt;
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	while (1)
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		if (!GPIO_PinInGet(BSP_BCC_RXPORT, BSP_BCC_RXPIN)) {
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			LEUART_Tx((void *) dev->base_addr, '0');
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			neg_cnt++;
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		}
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#endif
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	return 1;
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}
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static int efm32_uart_getc(struct uart *dev) {
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	return LEUART_Rx((void *) dev->base_addr);
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}
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static int efm32_uart_setup(struct uart *dev, const struct uart_params *params) {
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	LEUART_TypeDef      *leuart = (void *) dev->base_addr;
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	LEUART_Init_TypeDef init    = LEUART_INIT_DEFAULT;
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	/* Enable CORE LE clock in order to access LE modules */
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	CMU_ClockEnable(cmuClock_HFPER, true);
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	/* Enable CORE LE clock in order to access LE modules */
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	CMU_ClockEnable(cmuClock_GPIO, true);
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	/* Enable CORE LE clock in order to access LE modules */
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	CMU_ClockEnable(cmuClock_CORELE, true);
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	/* Select LFXO for LEUARTs (and wait for it to stabilize) */
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	CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
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	CMU_ClockEnable(cmuClock_LEUART0, true);
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	/* Do not prescale clock */
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	CMU_ClockDivSet(cmuClock_LEUART0, cmuClkDiv_1);
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	/* Configure GPIO pin for UART TX */
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	/* To avoid false start, configure output as high. */
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	GPIO_PinModeSet( BSP_BCC_TXPORT, BSP_BCC_TXPIN, gpioModePushPull, 1 );
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	/* Configure GPIO pin for UART RX */
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	GPIO_PinModeSet( BSP_BCC_RXPORT, BSP_BCC_RXPIN, gpioModeInput, 1 );
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	/* Configure LEUART */
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	init.enable = leuartDisable;
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	init.baudrate = 9600;
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	LEUART_Init(leuart, &init);
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	/* Enable the switch that enables UART communication. */
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	GPIO_PinModeSet( BSP_BCC_ENABLE_PORT, BSP_BCC_ENABLE_PIN, gpioModePushPull, 1 );
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	BSP_BCC_LEUART->ROUTE |= LEUART_ROUTE_RXPEN | LEUART_ROUTE_TXPEN | BSP_BCC_LOCATION;
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	/* Finally enable it */
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	LEUART_Enable(leuart, leuartEnable);
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	return 0;
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}
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static const struct uart_ops efm32_uart_ops = {
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		.uart_getc = efm32_uart_getc,
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		.uart_putc = efm32_uart_putc,
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		.uart_hasrx = efm32_uart_hasrx,
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		.uart_setup = efm32_uart_setup,
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};
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static struct uart efm32_uart0 = {
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		.uart_ops = &efm32_uart_ops,
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		.irq_num = 0,
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		.base_addr = (unsigned long) LEUART0,
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};
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static const struct uart_params uart_defparams = {
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		.baud_rate = 115200,
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		.uart_param_flags = UART_PARAM_FLAGS_8BIT_WORD,
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};
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DIAG_SERIAL_DEF(&efm32_uart0, &uart_defparams);
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