哈哈,C8051F340超频到96MHz,真是爽呀 (amobbs.com 阿莫电子技术论坛) -

ibmx311 发表于 2012-3-7 17:16:57

哈哈,C8051F340超频到96MHz,真是爽呀

24MHz外部晶振进去后用时钟乘法器倍到96MHz
明天做一下高低温试验,如成功再汇报.

//-----------------------------------------------------------------------------
// F34x_PCA0_Software_Timer_Blinky.c
//-----------------------------------------------------------------------------
// In this example, PCA Module 0 is used to generate the interrupt, and the
// port pin driving the LED is configured for push-pull mode.
//
// Pinout:
//
// P2.2 - LED (push-pull)
//
// all other port pins unused
//

//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------

#include <C8051F340.h>             // SFR declarations

//-----------------------------------------------------------------------------
// Global Constants
//-----------------------------------------------------------------------------

#define SYSCLK    96000000       // Internal oscillator frequency in Hz

#define LED_FREQUENCY 100000             // Frequency to blink LED at in Hz
#define T0_CLOCKS 240                // Use 120 clocks per T0 Overflow

// SYSCLK cycles per interrupt
#define PCA_TIMEOUT ((SYSCLK/T0_CLOCKS)/LED_FREQUENCY/2)

sfr16 PCA0CP0 = 0xFB;                // PCA0 Compare Register Definition

sbit LED = P2^2;                   // LED='1' means ON

//-----------------------------------------------------------------------------
// Function Prototypes
//-----------------------------------------------------------------------------

void Oscillator_Init (void);
void Port_Init (void);
void PCA0_Init (void);

//-----------------------------------------------------------------------------
// Global Variables
//-----------------------------------------------------------------------------

unsigned int NEXT_COMPARE_VALUE;    // Next edge to be sent out in HSO mode

//-----------------------------------------------------------------------------
// main() Routine
//-----------------------------------------------------------------------------

void main (void) {

// Disable watchdog timer
PCA0MD = 0x00;

Port_Init ();                   // Initialize crossbar and GPIO
Oscillator_Init ();             // Initialize oscillator
PCA0_Init ();                   // Initialize PCA0

EA = 1;                         // Globally enable interrupts

while (1);                      // Spin here to wait for ISR
}

//-----------------------------------------------------------------------------
// Initialization Subroutines
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// Oscillator_Init
void Oscillator_Init (void)
{
//OSCICN = 0x83;                   // Set internal oscillator to run
                                    // at its maximum frequency

//CLKSEL = 0x00;                   // Select the internal osc. as
                                    // the SYSCLK source

int i = 0;
OSCXCN = 0x20;
FLSCL = 0x90;
CLKMUL = 0x81;
for (i = 0; i < 20; i++); // Wait 5us for initialization
CLKMUL |= 0xC0;
while ((CLKMUL & 0x20) == 0);
CLKSEL = 0x23;
OSCICN = 0x03;
}

//-----------------------------------------------------------------------------
// Port_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters : None
//
// This function configures the crossbar and GPIO ports.
//
// No crossbar peripherals are used for this example.
//
// P2.2 is set to Push-Pull mode.
//
//-----------------------------------------------------------------------------
void Port_Init (void)
{
// XBR0 = 0x00;
//XBR1 = 0x40;                      // No peripherals routed to pins
                                    // Enable crossbar and weak pull-ups

//P2MDOUT |= 0x04;                // Set LED (P2.2) to push-pull
   // P0.0-Unassigned,Open-Drain, Digital
// P0.1-Unassigned,Open-Drain, Digital
// P0.2-Unassigned,Open-Drain, Digital
// P0.3-Unassigned,Open-Drain, Digital
// P0.4-Unassigned,Open-Drain, Digital
// P0.5-Unassigned,Open-Drain, Digital
// P0.6-Unassigned,Open-Drain, Digital
// P0.7-Skipped, Open-Drain, Digital

// P1.0-Unassigned,Open-Drain, Digital
// P1.1-Unassigned,Open-Drain, Digital
// P1.2-Unassigned,Open-Drain, Digital
// P1.3-Unassigned,Open-Drain, Digital
// P1.4-Unassigned,Open-Drain, Digital
// P1.5-Unassigned,Open-Drain, Digital
// P1.6-Unassigned,Open-Drain, Digital
// P1.7-Unassigned,Open-Drain, Digital

// P2.0-Unassigned,Open-Drain, Digital
// P2.1-Unassigned,Open-Drain, Digital
// P2.2-Unassigned,Push-Pull,Digital
// P2.3-Unassigned,Open-Drain, Digital
// P2.4-Unassigned,Open-Drain, Digital
// P2.5-Unassigned,Open-Drain, Digital
// P2.6-Unassigned,Open-Drain, Digital
// P2.7-Unassigned,Open-Drain, Digital

// P3.0-Unassigned,Open-Drain, Digital
// P3.1-Unassigned,Open-Drain, Digital
// P3.2-Unassigned,Open-Drain, Digital
// P3.3-Unassigned,Open-Drain, Digital
// P3.4-Unassigned,Open-Drain, Digital
// P3.5-Unassigned,Open-Drain, Digital
// P3.6-Unassigned,Open-Drain, Digital
// P3.7-Unassigned,Open-Drain, Digital

P2MDOUT = 0x04;
P0SKIP = 0x80;
XBR1    = 0x40;
}

//-----------------------------------------------------------------------------
// PCA0_Init
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters : None
//
// This function configures the PCA time base to use T0 Overflows as a clock
// source.Timer0 is also configured by this routine for 8-bit auto-reload
// mode, where T0_CLOCKS is the number of System clocks per T0 Overflow.
// The code then sets up Software Timer mode for Module 0 (CEX0 pin).
//
// On every interrupt from Module 0, software toggles the port I/O pin for the
// LED. The frequency of the LED toggling is determined by the parameter
// CEX0_FREQUENCY.
//

// Using different PCA clock sources, different T0 reload values, or a
// different processor clock will result in a different frequency for the LED
// square wave, and different maximum and minimum options.
//
// -------------------------------------------------------------------------
// How "Software Timer Mode" Works:
//
//    The PCA's Software Timer Mode works by generating an interrupt for the
// associated module every time the PCA0 register increments and the new
// 16-bit PCA0 counter value matches the module's capture/compare
// register (PCA0CPn).
//
// By loading the PCA0CPn register with the next match value every time a
// match happens, arbitrarily timed interrupts can be generated.
// -------------------------------------------------------------------------
//
// When setting the capture/compare register for the next match value, the low
// byte of the PCA0CPn register (PCA0CPLn) should be written first, followed
// by the high byte (PCA0CPHn).Writing the low byte clears the ECOMn bit,
// and writing the high byte will restore it.This ensures that a match does
// not occur until the full 16-bit value has been written to the compare
// register.Writing the high byte first will result in the ECOMn bit being
// set to '0' after the 16-bit write, and the next match will not occur at
// the correct time.
//
// It is best to update the capture/compare register as soon after a match
// occurs as possible so that the PCA counter will not have incremented past
// the next desired edge value. This code implements the compare register
// update in the PCA ISR upon a match interrupt.
//
//-----------------------------------------------------------------------------
void PCA0_Init (void)
{

// Configure Timer 0 for 8-bit auto-reload mode, using SYSCLK as time base
TMOD &= 0xF0;                   // Clear all T0 control bits
TMOD |= 0x02;                   // 8-bit auto-reload timer
CKCON |= 0x04;                   // T0 uses SYSCLK
TH0 = -T0_CLOCKS;                // Set up reload value
TL0 = -T0_CLOCKS;                // Set up initial value

// Configure PCA time base; overflow interrupt disabled
PCA0CN = 0x00;                   // Stop counter; clear all flags
PCA0MD = 0x04;                   // Use Timer 0 as time base

PCA0CPM0 = 0x49;                // Module 0 = Software Timer Mode,
                                    // Enable Module 0 Interrupt flag,
                                    // Enable ECOM bit

PCA0L = 0x00;                   // Reset PCA Counter Value to 0x0000
PCA0H = 0x00;

PCA0CPL0 = PCA_TIMEOUT & 0x00FF; // Set up first match
PCA0CPH0 = (PCA_TIMEOUT & 0xFF00) >> 8;

// Set up the variable for the following match
NEXT_COMPARE_VALUE = PCA0CP0 + PCA_TIMEOUT;

EIE1 |= 0x10;                   // Enable PCA interrupts

CR = 1;                         // Start PCA
TR0 = 1;                         // Start Timer 0

}

//-----------------------------------------------------------------------------
// Interrupt Service Routines
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
// PCA0_ISR
//-----------------------------------------------------------------------------
//
// Return Value : None
// Parameters : None
//
// This is the ISR for the PCA.It handles the case when a match occurs on
// channel 0, and updates the PCA0CPn compare register with the value held in
// the global variable "NEXT_COMPARE_VALUE".
//
//-----------------------------------------------------------------------------
void PCA0_ISR (void) interrupt 11
{
if (CCF0)                         // If Module 0 caused the interrupt
{
   CCF0 = 0;                      // Clear module 0 interrupt flag.

   PCA0CPL0 = (NEXT_COMPARE_VALUE & 0x00FF);
   PCA0CPH0 = (NEXT_COMPARE_VALUE & 0xFF00)>>8;

   LED = ~LED;                   // Invert the LED pin

   // Set up the variable for the following edge
   NEXT_COMPARE_VALUE = PCA0CP0 + PCA_TIMEOUT;
}
else                            // Interrupt was caused by other bits.
{
   PCA0CN &= ~0x86;             // Clear other interrupt flags for PCA
}
}

//-----------------------------------------------------------------------------
// End Of File
//-----------------------------------------------------------------------------

lovelywwei 发表于 2012-3-7 17:44:57

这个嘛，个人玩玩还不错，但要用到产品中，我不知道几个人敢哪，产品可靠性怎么保证。

Excellence 发表于 2012-3-7 19:01:14

为什么要超频？

fythsg 发表于 2012-3-8 23:01:31

似乎最高可到120MHz吧

http://cache.amobbs.com/bbs_upload782111/files_53/ourdev_725054NEOSRL.JPG
(原文件名:120m.JPG)

Sullivan 发表于 2012-3-8 23:14:17

疯狂的51

ibmx311 发表于 2012-3-9 00:13:09

哈哈,真相来了,步进电机瞬间加速到1800转/分钟(每转2000脉冲),加减速时间都控制在120ms,快赶上伺服了.
放在桌上不抖动,很平稳.
如果MCU没速度的话,复杂的加减速不可能实现

今天视频传不上来,明天择机上传.

点击此处下载 ourdev_725083WKYI2P.rar(文件大小:1.66M) (原文件名:dianji.rar)

semonpic 发表于 2012-3-9 09:01:27

你要是敢在产品中这么干，你真牛逼。我都是将加减速做到CPLD/FPGA中.

Excellence 发表于 2012-3-9 09:27:47

关心楼主步进电机加减速的实现原理。呵呵呵。

jyzhiyu 发表于 2012-3-9 10:37:34

mark

ibmx311 发表于 2012-3-9 11:26:34

回复【6楼】semonpic
你要是敢在产品中这么干，你真牛逼。我都是将加减速做到cpld/fpga中.
-----------------------------------------------------------------------

我就是用在产品里的,不过是超到60MHz(指标是48MHz).96MHz的超频是做极限试验,这很有必要.
cpld那点资源只能给编码器反馈提供支持,还有键盘,显示,其他扩展io,电子齿轮比.别的就没法干了,所以还要MCU强一点好用.
我是绝对不会用fpga的,这不是明摆着做完叫人家随便抄吗.

omega999 发表于 2012-3-9 12:34:03

记号，silicon lab c8051f over clock

feeson 发表于 2012-3-9 12:48:54

醉酒狂飙。

jetli 发表于 2012-4-2 17:10:05

超频mcu也有飚车的感觉么？

暖烟发表于 2012-4-2 17:15:10

这个、、、下次看、、、先做个记号、、、呵呵、、

qinglong 发表于 2012-4-2 17:21:52

不错，如果稳定，我也试试。

davidd 发表于 2012-4-2 20:23:02

有点意思，overclock影响器件寿命吗

wubingqp 发表于 2012-4-2 20:32:36

做到产品上面似乎有点疯狂吧

wkgwz 发表于 2012-4-2 20:34:06

超频mcu有点意思
估计爽快的感觉不会太长久

huayuliang 发表于 2012-4-2 20:34:37

不考虑产品寿命？

lryxr2507 发表于 2012-4-3 18:44:39

ibmx311 发表于 2012-3-9 00:13 static/image/common/back.gif
哈哈,真相来了,步进电机瞬间加速到1800转/分钟(每转2000脉冲),加减速时间都控制在120ms,快赶上伺服了.
放在 ...

下来学习步进电机的加减算法,谢谢分享!

xiaobenyi 发表于 2012-4-9 12:46:33

这个要顶,MCU超频一倍的事情你都敢做,厉害!
不过如果能用F320超频,就更爽了
F340跑48M,在读Flash的时候都用了缓存技术,F320是直接读Flash的
F320能超了,就更爽了

guolh_bj 发表于 2012-4-9 13:00:50

牛～～～～～～

JACKGUO 发表于 2012-4-9 13:48:53

这个还是不要的好吧，选个性能更好的MCU

jetli 发表于 2012-4-9 23:59:18

xiaobenyi 发表于 2012-4-9 12:46 static/image/common/back.gif
这个要顶,MCU超频一倍的事情你都敢做,厉害!
不过如果能用F320超频,就更爽了
F340跑48M,在读Flash的时候都用 ...

你有F320试过没有？

俺木有，只能羡慕下了，{:loveliness:}

xiaobenyi 发表于 2012-4-10 08:42:14

jetli 发表于 2012-4-9 23:59 static/image/common/back.gif
你有F320试过没有？

俺木有，只能羡慕下了，

没想过,呵呵,从没实施过MCU超频的事情,除了AVR做的USB,8M超到12M,大家做的都很稳定

阿莫单片机 发表于 2012-5-3 21:47:51

哈哈，听起来很诱人啊，我在proteus里面把AT89S51的晶振改到了36MHZ也可以用，不过没在实际中搞过！期待，楼主的新发现！

lxa0 发表于 2012-5-4 00:04:58

这个也能超频啊
楼主厉害
做产品我都是降频使用的

智慧星 发表于 2014-1-4 16:07:41

{:lol:}年人这也能超！

hhhhhchch1 发表于 2014-2-26 10:13:55

mark~~~~~~~~

imfv 发表于 2014-2-27 00:25:52

直接上酷睿，何必超频？{:titter:}

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amobbs.com 阿莫电子技术论坛's Archiver

哈哈,C8051F340超频到96MHz,真是爽呀