rt-thread/bsp/lpc824/Libraries/common/board/board_lpc.c

285 lines
8.3 KiB
C

/*
* @brief NXP LPCXpresso LPC824 board file
*
* @note
* Copyright(C) NXP Semiconductors, 2013
* 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.
*/
// Must define _BOARD_C_ before ANY include
#define _BOARD_C_
#include "board_lpc.h"
#include "string.h"
#include <stdint.h>
/*****************************************************************************
* Private types/enumerations/variables
****************************************************************************/
#define BOARD_LED_CNT 8
/*****************************************************************************
* Public types/enumerations/variables
****************************************************************************/
/* System oscillator rate and clock rate on the CLKIN pin */
const uint32_t OscRateIn = MAIN_OSC_XTAL_FREQ_HZ;
const uint32_t ExtRateIn = EXT_CLOCK_IN_FREQ_HZ;
/*****************************************************************************
* Private functions
****************************************************************************/
static void Board_Key_Init(void)
{
int i;
LPC_IOCON_T *pIOCON = LPC_IOCON;
for (i = 0; i < BOARD_KEY_CNT; i++) {
Chip_GPIO_PinSetDIR(LPC_GPIO_PORT, 0, cs_keyBits[i], 0);
pIOCON->PIO0[cs_keyIoConNdce[i]] = 0x80; // weak pUp
}
}
/* Initialize the LEDs on the NXP LPC824 LPCXpresso Board */
static void Board_LED_Init(void)
{
int i;
for (i = 0; i < BOARD_LED_CNT; i++) {
Chip_GPIO_PinSetDIR(LPC_GPIO_PORT, 0, ledBits[i], 1);
Chip_GPIO_PinSetState(LPC_GPIO_PORT, 0, ledBits[i], true);
}
}
uint32_t Board_Key_GetKeyDown(uint32_t keyNdx)
{
LPC_GPIO_T *pGP = LPC_GPIO_PORT;
return pGP->W[0][cs_keyBits[keyNdx]] == 0 ? 1 : 0;
}
/* Board Debug UART Initialisation function */
STATIC void Board_UART_Init(void)
{
/* Enable the clock to the Switch Matrix */
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
/* Connect the TXD_O and RXD_I signals to port pins(P0.4, P0.0) */
//Chip_SWM_DisableFixedPin(SWM_FIXED_XTALIN);
//Chip_SWM_DisableFixedPin(SWM_FIXED_XTALOUT);
Chip_SWM_DisableFixedPin(SWM_FIXED_ACMP_I1);
Chip_SWM_DisableFixedPin(SWM_FIXED_ADC11);
/* Enable UART Divider clock, divided by 1 */
Chip_Clock_SetUARTClockDiv(1);
/* Divided by 1 */
if (DEBUG_UART == LPC_USART0) {
Chip_SWM_MovablePinAssign(SWM_U0_TXD_O, 4);
Chip_SWM_MovablePinAssign(SWM_U0_RXD_I, 0);
} else if (DEBUG_UART == LPC_USART1) {
Chip_SWM_MovablePinAssign(SWM_U1_TXD_O, 4);
Chip_SWM_MovablePinAssign(SWM_U1_RXD_I, 0);
} else {
Chip_SWM_MovablePinAssign(SWM_U2_TXD_O, 4);
Chip_SWM_MovablePinAssign(SWM_U2_RXD_I, 0);
}
/* Disable the clock to the Switch Matrix to save power */
Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
}
/* Initializes pin muxing for SPI1 interface - note that SystemInit() may
already setup your pin muxing at system startup */
static void Init_SPI_PinMux(void)
{
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
Chip_SWM_MovablePinAssign(SWM_SPI1_SSEL0_IO, 15);
Chip_SWM_MovablePinAssign(SWM_SPI1_SCK_IO, 24);
Chip_SWM_MovablePinAssign(SWM_SPI1_MISO_IO, 25);
Chip_SWM_MovablePinAssign(SWM_SPI1_MOSI_IO, 26);
Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
}
/* Initializes pin muxing for I2C interface */
static void Init_I2C_PinMux(void)
{
/* Enable the clock to the Switch Matrix */
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_SWM);
Chip_SWM_EnableFixedPin(SWM_FIXED_I2C0_SDA);
Chip_SWM_EnableFixedPin(SWM_FIXED_I2C0_SCL);
/* Enable Fast Mode Plus for I2C pins */
Chip_IOCON_PinSetI2CMode(LPC_IOCON, IOCON_PIO10, PIN_I2CMODE_FASTPLUS);
Chip_IOCON_PinSetI2CMode(LPC_IOCON, IOCON_PIO11, PIN_I2CMODE_FASTPLUS);
/* Disable the clock to the Switch Matrix to save power */
Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
}
/*****************************************************************************
* Public functions
****************************************************************************/
/* Set the LED to the state of "On" */
void Board_LED_Set(uint8_t LEDNumber, bool On)
{
if (LEDNumber < BOARD_LED_CNT) {
Chip_GPIO_PinSetState(LPC_GPIO_PORT, 0, ledBits[LEDNumber], (bool) !On);
}
}
/* Return the state of LEDNumber */
bool Board_LED_Test(uint8_t LEDNumber)
{
bool state = false;
if (LEDNumber < BOARD_LED_CNT) {
state = (bool) !Chip_GPIO_PinGetState(LPC_GPIO_PORT, 0, ledBits[LEDNumber]);
}
return state;
}
/* Toggles the current state of a board LED */
void Board_LED_Toggle(uint8_t LEDNumber)
{
if (LEDNumber < BOARD_LED_CNT) {
Chip_GPIO_PinToggleState(LPC_GPIO_PORT, 0, ledBits[LEDNumber]);
}
}
/* Classic implementation of itoa -- integer to ASCII */
char *Board_itoa(int value, char *result, int base)
{
char* ptr = result, *ptr1 = result, tmp_char;
int tmp_value;
if (base < 2 || base > 36) { *result = '\0'; return result; }
do {
tmp_value = value;
value /= base;
*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * base)];
} while ( value );
if (tmp_value < 0) *ptr++ = '-';
*ptr-- = '\0';
while (ptr1 < ptr) {
tmp_char = *ptr;
*ptr--= *ptr1;
*ptr1++ = tmp_char;
}
return result;
}
/* Sends a character on the UART */
void Board_UARTPutChar(char ch)
{
#if defined(DEBUG_UART)
Chip_UART_SendBlocking(DEBUG_UART, &ch, 1);
#endif
}
void Board_UARTPutTextChar(char ch)
{
#if defined(DEBUG_UART)
static char prevChar = 0;
if (ch == '\n' && prevChar != '\r')
{
prevChar = '\r';
Chip_UART_SendBlocking(DEBUG_UART, &prevChar, 1);
Chip_UART_SendBlocking(DEBUG_UART, &ch, 1);
} else {
Chip_UART_SendBlocking(DEBUG_UART, &ch, 1);
prevChar = ch;
}
#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_ReadBlocking(DEBUG_UART, &data, 1) == 1) {
Board_UARTPutChar(data); // echo back the char
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_UARTPutTextChar(*str++);
}
#endif
}
/* Initialize debug output via UART for board */
void Board_Debug_Init(void)
{
#if defined(DEBUG_UART)
Board_UART_Init();
Chip_UART_Init(DEBUG_UART);
Chip_UART_ConfigData(DEBUG_UART, UART_CFG_DATALEN_8 | UART_CFG_PARITY_NONE | UART_CFG_STOPLEN_1);
Chip_Clock_SetUSARTNBaseClockRate((115200 * 6 * 16), true);
Chip_UART_SetBaud(DEBUG_UART, 115200);
Chip_UART_Enable(DEBUG_UART);
Chip_UART_TXEnable(DEBUG_UART);
#endif
}
/* Set up and initialize all required blocks and functions related to the
board hardware */
void Board_Init(void)
{
LPC_SWM_T *pSWM = LPC_SWM;
/* Sets up DEBUG UART */
#if defined(DEBUG_ENABLE)
DEBUGINIT();
//pSWM->PINENABLE0 |= ~(1UL<<SWM_FIXED_SWCLK | 1UL<<SWM_FIXED_SWDIO | 1UL<<SWM_FIXED_RST);
#ifdef USE_IRC_AS_ROOT_CLOCK
pSWM->PINENABLE0 |= 1UL<<SWM_FIXED_XTALIN | 1UL<<SWM_FIXED_XTALOUT;
#endif
#endif
/* Initialize GPIO */
Chip_GPIO_Init(LPC_GPIO_PORT);
/* Initialize the LEDs */
Board_LED_Init();
//Board_Key_Init();
Init_SPI_PinMux();
Init_I2C_PinMux();
}