ESP-Ventilation/lpc_board_nxp_lpcxpresso_1549/src/board.c

/*
 * @brief LPCXPresso LPC1549 board file
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2014
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

#include "board.h"
#include "retarget.h"

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

/* System oscillator rate and RTC oscillator rate */
const uint32_t OscRateIn = 12000000;
const uint32_t RTCOscRateIn = 32768;

/*****************************************************************************
 * Private functions
 ****************************************************************************/

/*****************************************************************************
 * Public functions
 ****************************************************************************/

/* Sends a character on the UART */
void Board_UARTPutChar(char ch)
{
#if defined(DEBUG_UART)
	Chip_UART_SendBlocking(DEBUG_UART, &ch, 1);
#endif
}

/* Gets a character from the UART, returns EOF if no character is ready */
int Board_UARTGetChar(void)
{
#if defined(DEBUG_UART)
	uint8_t data;

	if (Chip_UART_Read(DEBUG_UART, &data, 1) == 1) {
		return (int) data;
	}
#endif
	return EOF;
}

/* Outputs a string on the debug UART */
void Board_UARTPutSTR(const char *str)
{
#if defined(DEBUG_UART)
	while (*str != '\0') {
		Board_UARTPutChar(*str++);
	}
#endif
}

/* Initialize debug output via UART for board */
void Board_Debug_Init(void)
{
#if defined(DEBUG_UART)
	/* Disables pullups/pulldowns and enable digitial mode */
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 13, (IOCON_MODE_INACT | IOCON_DIGMODE_EN));
	Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 18, (IOCON_MODE_INACT | IOCON_DIGMODE_EN));

	/* UART signal muxing via SWM */
	Chip_SWM_MovablePortPinAssign(SWM_UART0_RXD_I, 0, 13);
	Chip_SWM_MovablePortPinAssign(SWM_UART0_TXD_O, 0, 18);

	/* Use main clock rate as base for UART baud rate divider */
	Chip_Clock_SetUARTBaseClockRate(Chip_Clock_GetMainClockRate(), false);

	/* Setup UART */
	Chip_UART_Init(DEBUG_UART);
	Chip_UART_ConfigData(DEBUG_UART, UART_CFG_DATALEN_8 | UART_CFG_PARITY_NONE | UART_CFG_STOPLEN_1);
	Chip_UART_SetBaud(DEBUG_UART, 115200);
	Chip_UART_Enable(DEBUG_UART);
	Chip_UART_TXEnable(DEBUG_UART);
#endif
}

#define MAXLEDS 3
static const uint8_t ledpins[MAXLEDS] = {25, 3, 1};
static const uint8_t ledports[MAXLEDS] = {0, 0, 1};

/* Initializes board LED(s) */
static void Board_LED_Init(void)
{
	int idx;

	for (idx = 0; idx < MAXLEDS; idx++) {
		/* Set the GPIO as output with initial state off (high) */
		Chip_GPIO_SetPinDIROutput(LPC_GPIO, ledports[idx], ledpins[idx]);
		Chip_GPIO_SetPinState(LPC_GPIO, ledports[idx], ledpins[idx], true);
	}
}

/* Sets the state of a board LED to on or off */
void Board_LED_Set(uint8_t LEDNumber, bool On)
{
	if (LEDNumber < MAXLEDS) {
		/* Toggle state, low is on, high is off */
		Chip_GPIO_SetPinState(LPC_GPIO, ledports[LEDNumber], ledpins[LEDNumber], !On);
	}
}

/* Returns the current state of a board LED */
bool Board_LED_Test(uint8_t LEDNumber)
{
	bool state = false;

	if (LEDNumber < MAXLEDS) {
		state = !Chip_GPIO_GetPinState(LPC_GPIO, ledports[LEDNumber], ledpins[LEDNumber]);
	}

	return state;
}

/* Toggles the current state of a board LED */
void Board_LED_Toggle(uint8_t LEDNumber)
{
	Chip_GPIO_SetPinToggle(LPC_GPIO, ledports[LEDNumber], ledpins[LEDNumber]);
}

/* Set up and initialize all required blocks and functions related to the
   board hardware */
void Board_Init(void)
{
	/* Sets up DEBUG UART */
	DEBUGINIT();

	/* Initialize GPIO */
	Chip_GPIO_Init(LPC_GPIO);

	/* Initialize LEDs */
	Board_LED_Init();
}

/* Ordered up, down, left, right, press */
#define NUM_BUTTONS 5
static const uint8_t portButton[NUM_BUTTONS] = {1, 1, 1, 1, 1};
static const uint8_t pinButton[NUM_BUTTONS] = {4, 6, 8, 7, 5};
static const uint8_t stateButton[NUM_BUTTONS] = {JOY_UP, JOY_DOWN, JOY_LEFT,
												 JOY_RIGHT, JOY_PRESS};

/* Initialize Joystick */
void Board_Joystick_Init(void)
{
	int i;

	/* IOCON states already selected in SystemInit(), GPIO setup only. Pullups
	   are external, so IOCON with no states */
	for (i = 0; i < NUM_BUTTONS; i++) {
		Chip_GPIO_SetPinDIRInput(LPC_GPIO, portButton[i], pinButton[i]);
	}
}

/* Get Joystick status */
uint8_t Joystick_GetStatus(void)
{
	uint8_t i, ret = 0;

	for (i = 0; i < NUM_BUTTONS; i++) {
		if ((Chip_GPIO_GetPinState(LPC_GPIO, portButton[i], pinButton[i])) == 0x00) {
			ret |= stateButton[i];
		}
	}

	return ret;
}