/**************************************************************************//**
* @file system_LPC17xx.c
* @brief CMSIS Cortex-M3 Device Peripheral Access Layer Source File
* for the NXP LPC17xx Device Series
* @version V1.08
* @date 12. May 2010
*
* @note
* Copyright (C) 2009 ARM Limited. All rights reserved.
*
* @par
* ARM Limited (ARM) is supplying this software for use with Cortex-M
* processor based microcontrollers. This file can be freely distributed
* within development tools that are supporting such ARM based processors.
*
* @par
* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
* ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
* CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
*
******************************************************************************/
/*
//-------- <<< Use Configuration Wizard in Context Menu >>> ------------------
*/
/*--------------------- Clock Configuration ----------------------------------
//
// Clock Configuration
// System Controls and Status Register (SCS)
// OSCRANGE: Main Oscillator Range Select
// <0=> 1 MHz to 20 MHz
// <1=> 15 MHz to 24 MHz
// OSCEN: Main Oscillator Enable
//
//
//
// Clock Source Select Register (CLKSRCSEL)
// CLKSRC: PLL Clock Source Selection
// <0=> Internal RC oscillator
// <1=> Main oscillator
// <2=> RTC oscillator
//
//
// PLL0 Configuration (Main PLL)
// PLL0 Configuration Register (PLL0CFG)
// F_cco0 = (2 * M * F_in) / N
// F_in must be in the range of 32 kHz to 50 MHz
// F_cco0 must be in the range of 275 MHz to 550 MHz
// MSEL: PLL Multiplier Selection
// <6-32768><#-1>
// M Value
// NSEL: PLL Divider Selection
// <1-256><#-1>
// N Value
//
//
//
// PLL1 Configuration (USB PLL)
// PLL1 Configuration Register (PLL1CFG)
// F_usb = M * F_osc or F_usb = F_cco1 / (2 * P)
// F_cco1 = F_osc * M * 2 * P
// F_cco1 must be in the range of 156 MHz to 320 MHz
// MSEL: PLL Multiplier Selection
// <1-32><#-1>
// M Value (for USB maximum value is 4)
// PSEL: PLL Divider Selection
// <0=> 1
// <1=> 2
// <2=> 4
// <3=> 8
// P Value
//
//
//
// CPU Clock Configuration Register (CCLKCFG)
// CCLKSEL: Divide Value for CPU Clock from PLL0
// <1-256><#-1>
//
//
// USB Clock Configuration Register (USBCLKCFG)
// USBSEL: Divide Value for USB Clock from PLL0
// <0-15>
// Divide is USBSEL + 1
//
//
// Peripheral Clock Selection Register 0 (PCLKSEL0)
// PCLK_WDT: Peripheral Clock Selection for WDT
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_TIMER0: Peripheral Clock Selection for TIMER0
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_TIMER1: Peripheral Clock Selection for TIMER1
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_UART0: Peripheral Clock Selection for UART0
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_UART1: Peripheral Clock Selection for UART1
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_PWM1: Peripheral Clock Selection for PWM1
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_I2C0: Peripheral Clock Selection for I2C0
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_SPI: Peripheral Clock Selection for SPI
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_SSP1: Peripheral Clock Selection for SSP1
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_DAC: Peripheral Clock Selection for DAC
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_ADC: Peripheral Clock Selection for ADC
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_CAN1: Peripheral Clock Selection for CAN1
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 6
// PCLK_CAN2: Peripheral Clock Selection for CAN2
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 6
// PCLK_ACF: Peripheral Clock Selection for ACF
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 6
//
//
// Peripheral Clock Selection Register 1 (PCLKSEL1)
// PCLK_QEI: Peripheral Clock Selection for the Quadrature Encoder Interface
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_GPIO: Peripheral Clock Selection for GPIOs
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_PCB: Peripheral Clock Selection for the Pin Connect Block
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_I2C1: Peripheral Clock Selection for I2C1
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_SSP0: Peripheral Clock Selection for SSP0
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_TIMER2: Peripheral Clock Selection for TIMER2
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_TIMER3: Peripheral Clock Selection for TIMER3
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_UART2: Peripheral Clock Selection for UART2
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_UART3: Peripheral Clock Selection for UART3
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_I2C2: Peripheral Clock Selection for I2C2
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_I2S: Peripheral Clock Selection for I2S
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_RIT: Peripheral Clock Selection for the Repetitive Interrupt Timer
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_SYSCON: Peripheral Clock Selection for the System Control Block
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
// PCLK_MC: Peripheral Clock Selection for the Motor Control PWM
// <0=> Pclk = Cclk / 4
// <1=> Pclk = Cclk
// <2=> Pclk = Cclk / 2
// <3=> Pclk = Hclk / 8
//
//
// Power Control for Peripherals Register (PCONP)
// PCTIM0: Timer/Counter 0 power/clock enable
// PCTIM1: Timer/Counter 1 power/clock enable
// PCUART0: UART 0 power/clock enable
// PCUART1: UART 1 power/clock enable
// PCPWM1: PWM 1 power/clock enable
// PCI2C0: I2C interface 0 power/clock enable
// PCSPI: SPI interface power/clock enable
// PCRTC: RTC power/clock enable
// PCSSP1: SSP interface 1 power/clock enable
// PCAD: A/D converter power/clock enable
// PCCAN1: CAN controller 1 power/clock enable
// PCCAN2: CAN controller 2 power/clock enable
// PCGPIO: GPIOs power/clock enable
// PCRIT: Repetitive interrupt timer power/clock enable
// PCMC: Motor control PWM power/clock enable
// PCQEI: Quadrature encoder interface power/clock enable
// PCI2C1: I2C interface 1 power/clock enable
// PCSSP0: SSP interface 0 power/clock enable
// PCTIM2: Timer 2 power/clock enable
// PCTIM3: Timer 3 power/clock enable
// PCUART2: UART 2 power/clock enable
// PCUART3: UART 3 power/clock enable
// PCI2C2: I2C interface 2 power/clock enable
// PCI2S: I2S interface power/clock enable
// PCGPDMA: GP DMA function power/clock enable
// PCENET: Ethernet block power/clock enable
// PCUSB: USB interface power/clock enable
//
//
// Clock Output Configuration Register (CLKOUTCFG)
// CLKOUTSEL: Selects clock source for CLKOUT
// <0=> CPU clock
// <1=> Main oscillator
// <2=> Internal RC oscillator
// <3=> USB clock
// <4=> RTC oscillator
// CLKOUTDIV: Selects clock divider for CLKOUT
// <1-16><#-1>
// CLKOUT_EN: CLKOUT enable control
//
//
//
*/
#include "init_clk.h"
#include
#include
#include "config_LPC1769.h"
#define CLOCK_SETUP 1
#define SCS_Val 0x00000020
#define CLKSRCSEL_Val 0x00000001
#define PLL0_SETUP 1
#define PLL0CFG_Val 0x00050063
#define PLL1_SETUP 1
#define PLL1CFG_Val 0x00000023
#define CCLKCFG_Val 0x00000003
#define USBCLKCFG_Val 0x00000000
#define PCLKSEL0_Val (0b01 << 16) // SPI CLK = CCK
#define PCLKSEL1_Val 0x00000000
#define PCONP_Val 0x042887DE
#define CLKOUTCFG_Val 0x00000000
/*--------------------- Flash Accelerator Configuration ----------------------
//
// Flash Accelerator Configuration
// FLASHTIM: Flash Access Time
// <0=> 1 CPU clock (for CPU clock up to 20 MHz)
// <1=> 2 CPU clocks (for CPU clock up to 40 MHz)
// <2=> 3 CPU clocks (for CPU clock up to 60 MHz)
// <3=> 4 CPU clocks (for CPU clock up to 80 MHz)
// <4=> 5 CPU clocks (for CPU clock up to 100 MHz)
// <5=> 6 CPU clocks (for any CPU clock)
//
*/
#define FLASH_SETUP 1
#define FLASHCFG_Val 0x00004000
/*
//-------- <<< end of configuration section >>> ------------------------------
*/
/*----------------------------------------------------------------------------
Check the register settings
*----------------------------------------------------------------------------*/
#define CHECK_RANGE(val, min, max) ((val < min) || (val > max))
#define CHECK_RSVD(val, mask) (val & mask)
/* Clock Configuration -------------------------------------------------------*/
#if (CHECK_RSVD((SCS_Val), ~0x00000030))
#error "SCS: Invalid values of reserved bits!"
#endif
#if (CHECK_RANGE((CLKSRCSEL_Val), 0, 2))
#error "CLKSRCSEL: Value out of range!"
#endif
#if (CHECK_RSVD((PLL0CFG_Val), ~0x00FF7FFF))
#error "PLL0CFG: Invalid values of reserved bits!"
#endif
#if (CHECK_RSVD((PLL1CFG_Val), ~0x0000007F))
#error "PLL1CFG: Invalid values of reserved bits!"
#endif
#if (PLL0_SETUP) /* if PLL0 is used */
#if (CCLKCFG_Val < 2) /* CCLKSEL must be greater then 1 */
#error "CCLKCFG: CCLKSEL must be greater then 1 if PLL0 is used!"
#endif
#endif
#if (CHECK_RANGE((CCLKCFG_Val), 2, 255))
#error "CCLKCFG: Value out of range!"
#endif
#if (CHECK_RSVD((USBCLKCFG_Val), ~0x0000000F))
#error "USBCLKCFG: Invalid values of reserved bits!"
#endif
#if (CHECK_RSVD((PCLKSEL0_Val), 0x000C0C00))
#error "PCLKSEL0: Invalid values of reserved bits!"
#endif
#if (CHECK_RSVD((PCLKSEL1_Val), 0x03000300))
#error "PCLKSEL1: Invalid values of reserved bits!"
#endif
#if (CHECK_RSVD((PCONP_Val), 0x10100821))
#error "PCONP: Invalid values of reserved bits!"
#endif
#if (CHECK_RSVD((CLKOUTCFG_Val), ~0x000001FF))
#error "CLKOUTCFG: Invalid values of reserved bits!"
#endif
/* Flash Accelerator Configuration -------------------------------------------*/
#if (CHECK_RSVD((FLASHCFG_Val), ~0x0000F000))
#error "FLASHCFG: Invalid values of reserved bits!"
#endif
/*----------------------------------------------------------------------------
DEFINES
*----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
Define clocks
*----------------------------------------------------------------------------*/
#define XTAL (12000000UL) /* Oscillator frequency */
#define OSC_CLK ( XTAL) /* Main oscillator frequency */
#define RTC_CLK ( 32000UL) /* RTC oscillator frequency */
#define IRC_OSC ( 4000000UL) /* Internal RC oscillator frequency */
/* F_cco0 = (2 * M * F_in) / N */
#define __M (((PLL0CFG_Val ) & 0x7FFF) + 1)
#define __N (((PLL0CFG_Val >> 16) & 0x00FF) + 1)
#define __FCCO(__F_IN) ((2ULL * __M * __F_IN) / __N)
#define __CCLK_DIV (((CCLKCFG_Val ) & 0x00FF) + 1)
/* Determine core clock frequency according to settings */
#if (PLL0_SETUP)
#if ((CLKSRCSEL_Val & 0x03) == 1)
#define __CORE_CLK (__FCCO(OSC_CLK) / __CCLK_DIV)
#elif ((CLKSRCSEL_Val & 0x03) == 2)
#define __CORE_CLK (__FCCO(RTC_CLK) / __CCLK_DIV)
#else
#define __CORE_CLK (__FCCO(IRC_OSC) / __CCLK_DIV)
#endif
#else
#if ((CLKSRCSEL_Val & 0x03) == 1)
#define __CORE_CLK (OSC_CLK / __CCLK_DIV)
#elif ((CLKSRCSEL_Val & 0x03) == 2)
#define __CORE_CLK (RTC_CLK / __CCLK_DIV)
#else
#define __CORE_CLK (IRC_OSC / __CCLK_DIV)
#endif
#endif
/*----------------------------------------------------------------------------
Clock Variable definitions
*----------------------------------------------------------------------------*/
uint32_t SystemCoreClock = __CORE_CLK;/*!< System Clock Frequency (Core Clock)*/
/*----------------------------------------------------------------------------
Clock functions
*----------------------------------------------------------------------------*/
void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */
{
/* Determine clock frequency according to clock register values */
if (((PLL0STAT >> 24) & 3) == 3) { /* If PLL0 enabled and connected */
switch (CLKSRCSEL & 0x03) {
case 0: /* Int. RC oscillator => PLL0 */
case 3: /* Reserved, default to Int. RC */
SystemCoreClock = (IRC_OSC *
((2ULL * ((PLL0STAT & 0x7FFF) + 1))) /
(((PLL0STAT >> 16) & 0xFF) + 1) /
((CCLKCFG & 0xFF)+ 1));
break;
case 1: /* Main oscillator => PLL0 */
SystemCoreClock = (OSC_CLK *
((2ULL * ((PLL0STAT & 0x7FFF) + 1))) /
(((PLL0STAT >> 16) & 0xFF) + 1) /
((CCLKCFG & 0xFF)+ 1));
break;
case 2: /* RTC oscillator => PLL0 */
SystemCoreClock = (RTC_CLK *
((2ULL * ((PLL0STAT & 0x7FFF) + 1))) /
(((PLL0STAT >> 16) & 0xFF) + 1) /
((CCLKCFG & 0xFF)+ 1));
break;
}
} else {
switch (CLKSRCSEL & 0x03) {
case 0: /* Int. RC oscillator => PLL0 */
case 3: /* Reserved, default to Int. RC */
SystemCoreClock = IRC_OSC / ((CCLKCFG & 0xFF)+ 1);
break;
case 1: /* Main oscillator => PLL0 */
SystemCoreClock = OSC_CLK / ((CCLKCFG & 0xFF)+ 1);
break;
case 2: /* RTC oscillator => PLL0 */
SystemCoreClock = RTC_CLK / ((CCLKCFG & 0xFF)+ 1);
break;
}
}
}
/**
* Initialize the system
*
* @param none
* @return none
*
* @brief Setup the microcontroller system.
* Initialize the System.
*/
void SystemInit (void)
{
#if (CLOCK_SETUP) /* Clock Setup */
SCS = SCS_Val;
if (SCS_Val & (1 << 5)) { /* If Main Oscillator is enabled */
while ((SCS & (1<<6)) == 0);/* Wait for Oscillator to be ready */
}
CCLKCFG = CCLKCFG_Val; /* Setup Clock Divider */
PCLKSEL0 = PCLKSEL0_Val; /* Peripheral Clock Selection */
PCLKSEL1 = PCLKSEL1_Val;
CLKSRCSEL = CLKSRCSEL_Val; /* Select Clock Source for PLL0 */
#if (PLL0_SETUP)
PLL0CFG = PLL0CFG_Val; /* configure PLL0 */
PLL0FEED = 0xAA;
PLL0FEED = 0x55;
PLL0CON = 0x01; /* PLL0 Enable */
PLL0FEED = 0xAA;
PLL0FEED = 0x55;
while (!(PLL0STAT & (1<<26)));/* Wait for PLOCK0 */
PLL0CON = 0x03; /* PLL0 Enable & Connect */
PLL0FEED = 0xAA;
PLL0FEED = 0x55;
while (!(PLL0STAT & ((1<<25) | (1<<24))));/* Wait for PLLC0_STAT & PLLE0_STAT */
#endif
#if (PLL1_SETUP)
PLL1CFG = PLL1CFG_Val;
PLL1FEED = 0xAA;
PLL1FEED = 0x55;
PLL1CON = 0x01; /* PLL1 Enable */
PLL1FEED = 0xAA;
PLL1FEED = 0x55;
while (!(PLL1STAT & (1<<10)));/* Wait for PLOCK1 */
PLL1CON = 0x03; /* PLL1 Enable & Connect */
PLL1FEED = 0xAA;
PLL1FEED = 0x55;
while (!(PLL1STAT & ((1<< 9) | (1<< 8))));/* Wait for PLLC1_STAT & PLLE1_STAT */
#else
USBCLKCFG = USBCLKCFG_Val; /* Setup USB Clock Divider */
#endif
PCONP = PCONP_Val; /* Power Control for Peripherals */
CLKOUTCFG = CLKOUTCFG_Val; /* Clock Output Configuration */
#endif
#if (FLASH_SETUP == 1) /* Flash Accelerator Setup */
FLASHCFG = (FLASHCFG & ~0x0000F000) | FLASHCFG_Val;
#endif
}