Add console implementation on LPC2478 porting.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@11 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
bernard.xiong
parent
53919ba500
commit
1df36ebf2f
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@ -18,7 +18,7 @@
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#include <LPC24xx.h>
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#include "board.h"
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/* #define BOARD_DEBUG */
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/* #define RT_BOARD_DEBUG */
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#define DATA_COUNT 14400000/RT_TICK_PER_SECOND /* T0MR0 = delayInMs * (Fpclk / 1000); */
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@ -38,14 +38,60 @@ void rt_timer_handler(int vector)
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VICVectAddr = 0; /* Acknowledge Interrupt */
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}
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/**
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* This function is used to display a string on console, normally, it's
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* invoked by rt_kprintf
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*
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* @param str the displayed string
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*/
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void rt_hw_console_output(const char* str)
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{
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while (*str)
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{
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if (*str=='\n')
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{
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while (!(U0LSR & 0x20));
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U0THR = '\r';
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}
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while (!(U0LSR & 0x20));
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U0THR = *str;
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str ++;
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}
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}
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#define BAUD_RATE 115200
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#define U0PINS 0x50
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void rt_hw_console_init()
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{
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rt_uint32_t fdiv;
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/* Enable RxD and TxD pins */
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PINSEL0 = U0PINS;
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/* 8 bits, no Parity, 1 Stop bit */
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U0LCR = 0x83;
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/* Setup Baudrate */
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fdiv = ( PCLK / 16 ) / BAUD_RATE ; /*baud rate */
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U0DLM = fdiv / 256;
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U0DLL = fdiv % 256;
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U0FCR = 0x00; /* Enable and reset TX and RX FIFO. */
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U0LCR = 0x03; /* DLAB = 0 */
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/* DLAB = 0 */
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U0LCR = 0x03;
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}
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/**
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* This function will init LPC2478 board
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*/
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void rt_hw_board_init()
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{
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extern void rt_serial_init(void);
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/* init hardware serial */
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rt_serial_init();
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/* init console for rt_kprintf function */
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rt_hw_console_init();
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T0IR = 0xff;
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T0TC = 0;
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@ -58,148 +104,4 @@ void rt_hw_board_init()
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T0TCR = 0x01; //enable timer0 counter
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}
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/******************************************************************************
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** Function name: TargetInit
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**
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** Descriptions: Initialize the target board; it is called in a necessary
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** place, change it as needed
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void TargetInit(void)
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{
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/* Add your codes here */
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return;
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}
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/******************************************************************************
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** Function name: GPIOResetInit
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**
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** Descriptions: Initialize the target board before running the main()
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** function; User may change it as needed, but may not
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** deleted it.
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void GPIOResetInit( void )
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{
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return;
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}
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/******************************************************************************
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** Function name: ConfigurePLL
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**
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** Descriptions: Configure PLL switching to main OSC instead of IRC
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** at power up and wake up from power down.
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** This routine is used in TargetResetInit() and those
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** examples using power down and wake up such as
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** USB suspend to resume, ethernet WOL, and power management
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** example
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void ConfigurePLL ( void )
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{
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unsigned long MValue, NValue;
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if ( PLLSTAT & (1 << 25) )
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{
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PLLCON = 1; /* Enable PLL, disconnected */
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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}
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PLLCON = 0; /* Disable PLL, disconnected */
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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SCS |= 0x20; /* Enable main OSC */
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while( !(SCS & 0x40) ); /* Wait until main OSC is usable */
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CLKSRCSEL = 0x1; /* select main OSC, 12MHz, as the PLL clock source */
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PLLCFG = PLL_MValue | (PLL_NValue << 16);
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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PLLCON = 1; /* Enable PLL, disconnected */
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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CCLKCFG = CCLKDivValue; /* Set clock divider */
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#if USE_USB
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USBCLKCFG = USBCLKDivValue; /* usbclk = 288 MHz/6 = 48 MHz */
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#endif
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while ( ((PLLSTAT & (1 << 26)) == 0) ); /* Check lock bit status */
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MValue = PLLSTAT & 0x00007FFF;
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NValue = (PLLSTAT & 0x00FF0000) >> 16;
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while ((MValue != PLL_MValue) && ( NValue != PLL_NValue) );
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PLLCON = 3; /* enable and connect */
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PLLFEED = 0xaa;
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PLLFEED = 0x55;
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while ( ((PLLSTAT & (1 << 25)) == 0) ); /* Check connect bit status */
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return;
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}
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/******************************************************************************
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** Function name: TargetResetInit
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**
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** Descriptions: Initialize the target board before running the main()
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** function; User may change it as needed, but may not
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** deleted it.
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**
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void TargetResetInit(void)
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{
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MEMMAP = 0x1; /* remap to internal flash */
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#if USE_USB
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PCONP |= 0x80000000; /* Turn On USB PCLK */
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#endif
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/* Configure PLL, switch from IRC to Main OSC */
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ConfigurePLL();
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/* Set system timers for each component */
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#if (Fpclk / (Fcclk / 4)) == 1
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PCLKSEL0 = 0x00000000; /* PCLK is 1/4 CCLK */
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PCLKSEL1 = 0x00000000;
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#endif
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#if (Fpclk / (Fcclk / 4)) == 2
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PCLKSEL0 = 0xAAAAAAAA; /* PCLK is 1/2 CCLK */
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PCLKSEL1 = 0xAAAAAAAA;
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#endif
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#if (Fpclk / (Fcclk / 4)) == 4
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PCLKSEL0 = 0x55555555; /* PCLK is the same as CCLK */
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PCLKSEL1 = 0x55555555;
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#endif
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/* Set memory accelerater module*/
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MAMCR = 0;
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#if Fcclk < 20000000
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MAMTIM = 1;
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#else
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#if Fcclk < 40000000
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MAMTIM = 2;
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#else
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MAMTIM = 3;
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#endif
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#endif
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MAMCR = 2;
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GPIOResetInit();
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return;
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}
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/*@}*/
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@ -5,15 +5,20 @@
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2008-12-11 xuxinming first version
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include <rtthread.h>
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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extern void finsh_system_init(void);
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#endif
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#include <LPC24xx.h>
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#include <board.h>
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@ -23,46 +28,36 @@
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*/
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/*@{*/
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extern int rt_application_init(void);
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#ifdef RT_USING_DEVICE
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extern rt_err_t rt_hw_serial_init(void);
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#endif
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#ifdef __CC_ARM
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extern int Image$$RW_IRAM1$$ZI$$Limit;
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#else
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extern char __rodata_start[];
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extern char __rodata_end[];
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extern char __data_start[];
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extern char __bss_start[];
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extern char __data_end[];
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extern char __bss_end[];
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extern char __Heap_start[];
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extern char __Heap_end[];
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extern int __bss_end;
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#endif
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#ifdef RT_USING_FINSH
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extern void finsh_system_init(void);
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#endif
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extern int rt_application_init(void);
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/**
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* This function will startup RT-Thread RTOS.
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*/
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void rtthread_startup(void)
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{
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/* init hardware Target */
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// TargetResetInit();
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/* init hardware interrupt */
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rt_hw_interrupt_init();
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/* init board */
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rt_hw_board_init();
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rt_show_version();
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/* init tick */
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rt_system_tick_init();
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/* init kernel object */
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rt_system_object_init();
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rt_show_version();
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/* init timer system */
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rt_system_timer_init();
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@ -71,22 +66,27 @@ void rtthread_startup(void)
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#ifdef __CC_ARM
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rt_system_heap_init((void*)&Image$$RW_IRAM1$$ZI$$Limit, (void*)0x40010000);
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#else
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rt_system_heap_init((void*)__Heap_start, 0x40010000);
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rt_system_heap_init((void*)&__bss_end, (void*)0x40010000);
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#endif
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#endif
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/* init scheduler system */
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rt_system_scheduler_init();
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#ifdef RT_USING_DEVICE
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/* init hardware serial device */
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rt_hw_serial_init();
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/*init all registed devices*/
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rt_device_init_all();
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#endif
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/* init application */
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rt_application_init();
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#ifdef RT_USING_FINSH
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/* init the finsh input */
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rt_hw_finsh_init();
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/* init finsh */
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finsh_system_init();
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finsh_set_device("uart1");
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#endif
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/* init idle thread */
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@ -102,6 +102,7 @@ void rtthread_startup(void)
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#ifdef __CC_ARM
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int main(void)
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{
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/* invoke rtthread_startup */
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rtthread_startup();
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return 0;
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