201 lines
3.5 KiB
C
201 lines
3.5 KiB
C
#include "clock_init.h"
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#include "delay.h"
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#include "uart.h"
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//22.11MHz的IRC参数寄存器 0xFB
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//24MHz的IRC参数寄存器 0xFB
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#define IRC_22M (*((uint8 idata*)0xFA))
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#define IRC_24M (*((uint8 idata*)0xFB))
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//内核频率
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int32 sys_clk = FOSC;
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//-------------------------------------------------------------------------------------------------------------------
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// @brief STC32G设置系统频率
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// @param NULL 空值
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// @return void 系统频率
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// Sample usage:
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//-------------------------------------------------------------------------------------------------------------------
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uint32 set_clk(void)
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{
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P_SW2 |= 0x80;
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if(sys_clk == 22118400)
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{
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//选择 22.1184MHz
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CLKDIV = 0x04;
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IRTRIM = T22M_ADDR;
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VRTRIM = VRT27M_ADDR;
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IRCBAND = 0x02;
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CLKDIV = 0x00;
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}
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else if(sys_clk == 24000000)
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{
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//选择 24MHz
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CLKDIV = 0x04;
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IRTRIM = T24M_ADDR;
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VRTRIM = VRT27M_ADDR;
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IRCBAND = 0x02;
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CLKDIV = 0x00;
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}
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else if(sys_clk == 27000000)
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{
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//选择 27MHz
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CLKDIV = 0x04;
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IRTRIM = T27M_ADDR;
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VRTRIM = VRT27M_ADDR;
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IRCBAND = 0x02;
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CLKDIV = 0x00;
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}
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else if(sys_clk == 30000000)
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{
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//选择 30MHz
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CLKDIV = 0x04;
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IRTRIM = T30M_ADDR;
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VRTRIM = VRT27M_ADDR;
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IRCBAND = 0x02;
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CLKDIV = 0x00;
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}
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else if(sys_clk == 33177600)
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{
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//选择 33.1776MHz
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CLKDIV = 0x04;
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IRTRIM = T33M_ADDR;
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VRTRIM = VRT27M_ADDR;
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IRCBAND = 0x02;
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CLKDIV = 0x00;
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}
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else if(sys_clk == 35000000)
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{
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//选择 35MHz
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CLKDIV = 0x04;
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IRTRIM = T35M_ADDR;
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VRTRIM = VRT44M_ADDR;
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IRCBAND = 0x03;
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CLKDIV = 0x00;
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}
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else
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{
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sys_clk = 30000000;
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//选择 30MHz
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CLKDIV = 0x04;
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IRTRIM = T30M_ADDR;
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VRTRIM = VRT27M_ADDR;
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IRCBAND = 0x02;
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CLKDIV = 0x00;
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}
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return sys_clk;
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}
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void board_init(void)
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{
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EAXFR = 1; // 使能访问XFR
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CKCON = 0x00; // 设置外部数据总线为最快
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WTST = 0; // 设置程序代码等待参数，赋值为0可将CPU执行程序的速度设置为最快
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SET_P54_RESRT; // 使P54为复位引脚
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P_SW2 = 0x80; // 开启特殊地址访问
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#if (1 == EXTERNAL_CRYSTA_ENABLE)
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XOSCCR = 0xc0; //启动外部晶振
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while (!(XOSCCR & 1)); //等待时钟稳定
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CLKDIV = 0x00; //时钟不分频
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CLKSEL = 0x01; //选择外部晶振
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#else
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//自动设置系统频率
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#if (0 == FOSC)
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sys_clk = set_clk();
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#else
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sys_clk = FOSC;
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#endif
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#endif
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delay_init(); //延时函数初始化
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WTST = 0;
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P_SW2 |= 0x80;
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CLKDIV = 0; //24MHz主频，分频设置
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P0M0 = 0x00;
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P0M1 = 0x00;
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P1M0 = 0x00;
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P1M1 = 0x00;
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P2M0 = 0x00;
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P2M1 = 0x00;
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P3M0 = 0x00;
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P3M1 = 0x00;
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P4M0 = 0x00;
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P4M1 = 0x00;
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P5M0 = 0x00;
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P5M1 = 0x00;
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P6M0 = 0x00;
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P6M1 = 0x00;
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P7M0 = 0x00;
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P7M1 = 0x00;
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ADCCFG = 0;
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AUXR = 0;
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SCON = 0;
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S2CON = 0;
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S3CON = 0;
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S4CON = 0;
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P_SW1 = 0;
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IE2 = 0;
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TMOD = 0;
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P_SW2 |= 0x80;
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#if (1 == USE_USB_CDC)
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P3M0 &= ~0x03;
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P3M1 |= 0x03;
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IRC48MCR = 0x80;
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while (!(IRC48MCR & 0x01));
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USBCLK = 0x00;
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USBCON = 0x90;
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usb_init();
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IE2 |= 0x80;
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EA = 1;
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while (DeviceState != DEVSTATE_CONFIGURED); //等待USB完成配置
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#else
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uart_init(DEBUG_UART, DEBUG_UART_RX_PIN, DEBUG_UART_TX_PIN, DEBUG_UART_BAUD, DEBUG_UART_TIM);
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#endif
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EnableGlobalIRQ();
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}
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#if (1 == PRINTF_ENABLE)
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#if (1==USE_USB_CDC)
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#else
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//重定义printf 数字 只能输出uint16
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char putchar(char c)
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{
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uart_putchar(DEBUG_UART, c);//把自己实现的串口打印一字节数据的函数替换到这里
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return c;
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}
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#endif
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#endif
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void DisableGlobalIRQ(void)
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{
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EA = 0;
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}
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void EnableGlobalIRQ(void)
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{
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EA = 1;
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}
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