📄 bsp.c
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/*
*********************************************************************************************************
* Philips LPC214x
* LPC2148 Kick Start Card Board Support Package
*
* (c) Copyright 2006, Micrium, Weston, FL
* All Rights Reserved
*
*
* File : BSP.C
* By : Jean J. Labrosse
*********************************************************************************************************
*/
#define BSP_GLOBALS
#include <includes.h>
#define BSP_DEBUG 1
/*
*********************************************************************************************************
* CONSTANTS
*********************************************************************************************************
*/
#define LED_1_BIT (CPU_INT32U)(1 << 25)
#define LCD_BIT_RW (CPU_INT32U)(1 << 29)
#define LCD_BIT_E (CPU_INT32U)(1 << 28)
#define LCD_BIT_RS (CPU_INT32U)(1 << 22)
#define LCD_BIT_DATA3 (CPU_INT32U)(1 << 13)
#define LCD_BIT_DATA2 (CPU_INT32U)(1 << 12)
#define LCD_BIT_DATA1 (CPU_INT32U)(1 << 11)
#define LCD_BIT_DATA0 (CPU_INT32U)(1 << 10)
/*
*********************************************************************************************************
* DATA TYPES
*********************************************************************************************************
*/
typedef void (*PFNCT)(void);
/*
*********************************************************************************************************
* VARIABLES
*********************************************************************************************************
*/
CPU_INT32U Tmr_ReloadCnts;
CPU_INT32U VIC_SpuriousInt;
/*
*********************************************************************************************************
* PROTOTYPES
*********************************************************************************************************
*/
static void BSP_PLL_Init (void);
static void BSP_IO_Init(void);
static void BSP_MAM_Init(void);
#ifdef DISP_MODULE_PRESENT
static void DispE_High(void);
static void DispE_Low(void);
static void DispRW_High(void);
static void DispRW_Low (void);
#endif
static void Tmr_TickInit(void);
static void VIC_Init(void);
static void VIC_Dummy(void);
static void VIC_DummyWDT(void);
static void VIC_DummyTIMER0(void);
static void VIC_DummyTIMER1(void);
static void VIC_DummyUART0(void);
static void VIC_DummyUART1(void);
static void VIC_DummyPWM0(void);
static void VIC_DummyI2C(void);
static void VIC_DummySPI(void);
static void VIC_DummyRTC(void);
static void VIC_DummyEINT0(void);
static void VIC_DummyEINT1(void);
static void VIC_DummyEINT2(void);
/*
*********************************************************************************************************
* Set up the PLL
*
* Description: This function sets up and activates the PLL
*********************************************************************************************************
*/
static void BSP_PLL_Init (void)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr = 0;
#endif
INT16U loop_ctr;
/* Configure PLL0, which determines the CPU clock */
PLLCFG = 0x00000023; /* Use PLL values of M = 4 and P = 2 */
PLLCON_bit.PLLE = 1; /* Set the PLL Enable bit */
OS_ENTER_CRITICAL();
PLLFEED = 0xAA; /* Write to the PLL Feed register */
PLLFEED = 0x55;
OS_EXIT_CRITICAL();
loop_ctr = 10000; /* Wait for the PLL to lock into the new frequency */
while (((PLLSTAT_bit.PLOCK) == 0) && (loop_ctr > 0)) {
loop_ctr--;
}
PLLCON_bit.PLLC = 1; /* Connect the PLL */
OS_ENTER_CRITICAL();
PLLFEED = 0xAA; /* Write to the PLL Feed register */
PLLFEED = 0x55;
OS_EXIT_CRITICAL();
VPBDIV = 0x00000002; /* Set the VPB frequency to one-half of the CPU clock */
}
/*
*********************************************************************************************************
* Get the CPU Clock Frequency
*
* Description: This function reads CPU registers to determine the CPU clock frequency of the chip.
*********************************************************************************************************
*/
CPU_INT32U BSP_CPU_ClkFreq (void)
{
CPU_INT32U msel;
CPU_INT32U cpu_clk_freq;
msel = (CPU_INT32U)(PLLCFG & 0x1F);
cpu_clk_freq = CPU_OSC_FREQ * (msel + 1);
return (cpu_clk_freq);
}
/*
*********************************************************************************************************
* Get the Peripheral Clock Frequency
*
* Description: This function reads CPU registers to determine the peripheral clock frequency of the chip.
*********************************************************************************************************
*/
CPU_INT32U BSP_CPU_ClkFreqPeripheral (void)
{
CPU_INT32U msel;
CPU_INT32U vpbdiv;
CPU_INT32U cpu_clk_freq;
CPU_INT32U cpu_peripheral_clk_freq;
msel = (CPU_INT32U)(PLLCFG & 0x1F);
cpu_clk_freq = CPU_OSC_FREQ * (msel + 1);
vpbdiv = (CPU_INT32U)(VPBDIV & 0x03);
switch (vpbdiv) {
case 0:
cpu_peripheral_clk_freq = cpu_clk_freq / 4;
break;
case 1:
cpu_peripheral_clk_freq = cpu_clk_freq;
break;
case 2:
cpu_peripheral_clk_freq = cpu_clk_freq / 2;
break;
default:
cpu_peripheral_clk_freq = cpu_clk_freq / 4;
break;
}
return (cpu_peripheral_clk_freq);
}
/*
*********************************************************************************************************
* BSP INITIALIZATION
*
* Description : This function should be called by your application code before you make use of any of the
* functions found in this module.
*
* Arguments : none
*********************************************************************************************************
*/
void BSP_Init (void)
{
MEMMAP = 2; /* Remap 64 bytes of int. RAM to 0x00 */
OS_CPU_InitExceptVect();
BSP_PLL_Init(); /* Initialize PLL0 and the VPB Divider Register */
BSP_MAM_Init(); /* Initialize the Memory Acceleration Module */
BSP_IO_Init(); /* Initialize the board's I/Os */
VIC_Init(); /* Initialize the Vectored Interrupt Controller */
LED_Init(); /* Initialize the I/Os for the LED controls */
Tmr_TickInit(); /* Initialize the uC/OS-II tick interrupt */
#ifdef DISP_MODULE_PRESENT
Tmr1_Init();
#endif
}
/*
*********************************************************************************************************
* DISABLE ALL INTERRUPTS
*
* Description : This function disables all interrupts from the interrupt controller.
*
* Arguments : none
*********************************************************************************************************
*/
void BSP_IntDisAll (void)
{
VICIntEnClear = 0xFFFFFFFFL; /* Disable ALL interrupts */
}
/*
*********************************************************************************************************
* INITIALIZE I/Os
*
* Description : This function initializes the GPIO pins. All the I/O pins are initialized in this function
* so you don't have to look at multiple places for I/O initialization.
*
* Arguments : none
*********************************************************************************************************
*/
static void BSP_IO_Init (void)
{
CPU_INT32U value;
SCS = 0x00000001; /* Fast GPIO registers will be used */
#if OS_VIEW_MODULE == 0
PINSEL0 = 0x00000000;
#endif
#if (OS_VIEW_MODULE > 0) && (OS_VIEW_COMM_SEL == OS_VIEW_UART_0)
PINSEL0 = 0x00000005; /* Enable UART0 I/Os */
#endif
#if (OS_VIEW_MODULE > 0) && (OS_VIEW_COMM_SEL == OS_VIEW_UART_1)
PINSEL0 = 0x00050000; /* Enable UART1 I/Os */
#endif
value = (1 << 16) | (1 << 15); /* Push buttons B2 and B1 */
FIO0DIR &= ~value;
/* LCD control lines */
value = ~((3 << 20) | (3 << 22) | (3 << 24) | (3 << 26));
PINSEL0 &= value;
/* LCD data lines */
value = ~((3 << 12) | (3 << 24) | (3 << 26));
PINSEL1 &= value;
value = LCD_BIT_DATA3 | LCD_BIT_DATA2 | LCD_BIT_DATA1 | LCD_BIT_DATA0 | LCD_BIT_E | LCD_BIT_RS | LCD_BIT_RW | LED_1_BIT;
FIO0DIR |= value;
#ifdef DISP_MODULE_PRESENT
DispRW_High();
#endif
PINSEL2 = 0x00000004;
}
/*$PAGE*/
/*
*********************************************************************************************************
* WRITE DATA TO DISPLAY DEVICE
*
* Description : This function sends a single BYTE to the display device.
* Arguments : 'data' is the BYTE to send to the display device
* Returns : none
* Notes : 1) The LPC2148 evaluation board uses a 4 bit interface.
* If an 8 bit interface is used. BSP_IO_Init() and DispDataWr() will need
* to be modified to reflect the new databus. In 8 bit mode, DispDataWrOneNibble()
* is not necessary.
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
void DispDataWr (CPU_INT08U data)
{
INT32U value;
DispRW_Low(); /* Set R/W write LOW to write to the LCD module */
DispE_High(); /* Write the UPPER nibble to the LCD module */
value = ((data >> 4) & 0x0F) << 10;
FIO0SET = value;
value = (~(data >> 4) & 0x0F) << 10;
FIO0CLR = value;
DispDly_uS(100);
DispE_Low();
DispDly_uS(100); /* Write the LOWER nibble to the LCD module */
DispE_High();
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