board_nxp_xpresso_11u14.c

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/*
 * @brief NXP XPRESSO 11U14 board file
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * 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"

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

#define BUTTONS_BUTTON1_GPIO_PORT_NUM   0
#define BUTTONS_BUTTON1_GPIO_BIT_NUM   16

#define JOYSTICK_UP_GPIO_PORT_NUM    1
#define JOYSTICK_UP_GPIO_BIT_NUM    22
#define JOYSTICK_DOWN_GPIO_PORT_NUM    1
#define JOYSTICK_DOWN_GPIO_BIT_NUM    20
#define JOYSTICK_LEFT_GPIO_PORT_NUM    1
#define JOYSTICK_LEFT_GPIO_BIT_NUM    23
#define JOYSTICK_RIGHT_GPIO_PORT_NUM   1
#define JOYSTICK_RIGHT_GPIO_BIT_NUM    21
#define JOYSTICK_PRESS_GPIO_PORT_NUM   1
#define JOYSTICK_PRESS_GPIO_BIT_NUM    19

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

/* System Clock Frequency (Core Clock) */
uint32_t SystemCoreClock;

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

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

void Board_UART_Init(void)
{
 /* Pin Muxing has already been done during the system init */
}

/* Sends a character on the UART */
void Board_UARTPutChar(char ch)
{
#if defined(DEBUG_ENABLE)
 /* Wait for space in FIFO */
 while ((IP_UART_ReadLineStatus(DEBUG_UART) & UART_LSR_THRE) == 0);
 Chip_UART_SendByte(DEBUG_UART, (uint8_t) ch);
#endif
}

/* Gets a character from the UART, returns EOF if no character is ready */
int Board_UARTGetChar(void)
{
#if defined(DEBUG_ENABLE)
 if (Chip_UART_ReadLineStatus(DEBUG_UART) & UART_LSR_RDR) {
  return (int) Chip_UART_ReadByte(DEBUG_UART);
 }
#endif
 return EOF;
}

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

/* Initialize debug output via UART for board */
void Board_Debug_Init(void)
{
#if defined(DEBUG_ENABLE)
 Board_UART_Init();

 /* Setup UART for 115.2K8N1 */
 Chip_UART_Init(LPC_USART);
 Chip_UART_SetBaud(LPC_USART, 115200);
 Chip_UART_ConfigData(LPC_USART, (UART_LCR_WLEN8 | UART_LCR_SBS_1BIT));
 Chip_UART_SetupFIFOS(LPC_USART, (UART_FCR_FIFO_EN | UART_FCR_TRG_LEV2));
 Chip_UART_TXEnable(LPC_USART);
#endif
}

/* Initializes board LED(s) */
static void Board_LED_Init(void)
{
 /* Set the PIO_7 as output */
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, 0, 7, true);
}

/* Sets the state of a board LED to on or off */
void Board_LED_Set(uint8_t LEDNumber, bool On)
{
 if(LEDNumber == 0)
  Chip_GPIO_WritePortBit(LPC_GPIO_PORT, 0, 7, On);
}

/* Returns the current state of a board LED */
bool Board_LED_Test(uint8_t LEDNumber)
{
 return Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, 0, 7);
}

/* Update system core clock rate, should be called if the system has
   a clock rate change */
void SystemCoreClockUpdate(void)
{
 /* CPU core speed */
 SystemCoreClock = Chip_Clock_GetSystemClockRate();
}

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

 /* Updates SystemCoreClock global var with current clock speed */
 SystemCoreClockUpdate();

 /* Initialize GPIO */
 Chip_GPIO_Init(LPC_GPIO_PORT);

 /* Initialize LEDs */
 Board_LED_Init();
}

void Board_SSP_Init(void)
{
 /* Only SSP0 is supported */
 /* SSEL0 */
 Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 2, (IOCON_FUNC1 | IOCON_MODE_PULLUP));
 /* SCK0 */
 Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 6, (IOCON_FUNC2 | IOCON_MODE_PULLUP));
 /* MISO0 */
 Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 8, (IOCON_FUNC1 | IOCON_MODE_PULLUP));
 /* MOSI0 */
 Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 9, (IOCON_FUNC1 | IOCON_MODE_PULLUP));
}

/* Configure pin for ADC channel 0 */
void Board_ADC_Init()
{
 Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 11, 0x2);
}

void Board_Buttons_Init(void)
{
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, BUTTONS_BUTTON1_GPIO_PORT_NUM, BUTTONS_BUTTON1_GPIO_BIT_NUM, false);
}

uint32_t Buttons_GetStatus(void)
{
 uint8_t ret = NO_BUTTON_PRESSED;
 if (Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, BUTTONS_BUTTON1_GPIO_PORT_NUM, BUTTONS_BUTTON1_GPIO_BIT_NUM) == 0x00) {
  ret |= BUTTONS_BUTTON1;
 }
 return ret;
}

void Board_Joystick_Init(void)
{
 Chip_IOCON_PinMuxSet(LPC_IOCON, JOYSTICK_UP_GPIO_PORT_NUM, JOYSTICK_UP_GPIO_BIT_NUM, (IOCON_FUNC0 | IOCON_MODE_PULLUP));
 Chip_IOCON_PinMuxSet(LPC_IOCON, JOYSTICK_DOWN_GPIO_PORT_NUM, JOYSTICK_DOWN_GPIO_BIT_NUM, (IOCON_FUNC0 | IOCON_MODE_PULLUP));
 Chip_IOCON_PinMuxSet(LPC_IOCON, JOYSTICK_LEFT_GPIO_PORT_NUM, JOYSTICK_LEFT_GPIO_BIT_NUM, (IOCON_FUNC0 | IOCON_MODE_PULLUP));
 Chip_IOCON_PinMuxSet(LPC_IOCON, JOYSTICK_RIGHT_GPIO_PORT_NUM, JOYSTICK_RIGHT_GPIO_BIT_NUM, (IOCON_FUNC0 | IOCON_MODE_PULLUP));
 Chip_IOCON_PinMuxSet(LPC_IOCON, JOYSTICK_PRESS_GPIO_PORT_NUM, JOYSTICK_PRESS_GPIO_BIT_NUM, (IOCON_FUNC0 | IOCON_MODE_PULLUP));
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, JOYSTICK_UP_GPIO_PORT_NUM, JOYSTICK_UP_GPIO_BIT_NUM, false);  // input
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, JOYSTICK_DOWN_GPIO_PORT_NUM, JOYSTICK_DOWN_GPIO_BIT_NUM, false); // input
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, JOYSTICK_LEFT_GPIO_PORT_NUM, JOYSTICK_LEFT_GPIO_BIT_NUM, false); // input
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, JOYSTICK_RIGHT_GPIO_PORT_NUM, JOYSTICK_RIGHT_GPIO_BIT_NUM, false); // input
 Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, JOYSTICK_PRESS_GPIO_PORT_NUM, JOYSTICK_PRESS_GPIO_BIT_NUM, false); // input
}

uint8_t Joystick_GetStatus(void)
{
 uint8_t ret = NO_BUTTON_PRESSED;
 if ((Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, JOYSTICK_UP_GPIO_PORT_NUM, JOYSTICK_UP_GPIO_BIT_NUM)) == 0x00) {
  ret |= JOY_UP;
 }
 else if (Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, JOYSTICK_DOWN_GPIO_PORT_NUM, JOYSTICK_DOWN_GPIO_BIT_NUM) == 0x00) {
  ret |= JOY_DOWN;
 }
 else if ((Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, JOYSTICK_LEFT_GPIO_PORT_NUM, JOYSTICK_LEFT_GPIO_BIT_NUM)) == 0x00) {
  ret |= JOY_LEFT;
 }
 else if (Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, JOYSTICK_RIGHT_GPIO_PORT_NUM, JOYSTICK_RIGHT_GPIO_BIT_NUM) == 0x00) {
  ret |= JOY_RIGHT;
 }
 else if ((Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, JOYSTICK_PRESS_GPIO_PORT_NUM, JOYSTICK_PRESS_GPIO_BIT_NUM)) == 0x00) {
  ret |= JOY_PRESS;
 }
 return ret;
}