M051 SysCtl Peripheral Driver. More...

Collaboration diagram for M051 SysCtl:

Modules
	SysCtl_Peripheral_ID
	Values that can be passed to the xSysCtlPeripheralPresent(), xSysCtlPeripheralEnable(), xSysCtlPeripheralDisable(), and xSysCtlPeripheralReset() APIs as the ulPeripheral parameter.
	M051 SysCtl Peripheral clock source
	The following are values that can be passed to the SysCtlPeripheralClockSourceSet() API as the ulPeripheralsrc parameter.
	M051 SysCtl Hclk source
	The following are values that can be passed to the SysCtlHClockSourceSet()\ SysCtlHClockSet API as the ulhclkSrcSel parameter.
	M051 SysCtl Stick Source
	The following are values that can be passed to the SysCtlSysTickSourceSet() API as the ulstclkSrcSel parameter.
	M051 SysCtl Reset source
	The following are values that can be returned in the bit mask by the SysCtlResetSrcGet() API.
	M051 SysCtl Bod level
	The following are values that can be passed to the SysCtlSelectBODVolt() API as the ulVoltage parameter.
	M051 SysCtl Peripheral clock
	The following are values that can be passed to the SysCtlIPClockDividerSet() API as the ulConfig parameter.
	M051 SysCtl Clock configure
	The following are values that can be passed to the SysCtlClockSet() API as the ulConfig parameter.
	M051 SysCtl Exported APIS
	The whole SysCtl Exported APIS.

Detailed Description

M051 SysCtl Peripheral Driver.

The CoX Peripheral Library also provide APIs for function full functions of Nuvoton M051 SysCtl.This module supports the whole M051 Series.

The perpheral can be individual enable,disable and reset by software
The clock controller generates the clocks for the whole chip, including system clocks and all peripheral clocks.The clock generator consists of 5 clock sources which are listed below:One external 4~24 MHz high speed crystal;One programmable,PLL FOUT One internal 22.1184 MHz high speed oscillator ;One internal 10 kHz low speed oscillator.
When chip enters into power down mode, system clocks, some clock sources, and some peripheral clocks will be disabled. Some clock sources,peripherals clock are still active in power down mode.

2. API Groups

The SysCtl API is broken into three groups of functions:

those that deal with Clock control,
those that deal with Peripheral control,
those that deal with Power control.

2.1 SysCtl clock control APIs

The SysCtl clock control are dealed with :

2.2 SysCtl Peripharal Control APIs

The SysCtl clock control are dealed with :

2.3 SysCtl power control

The SysCtl power control are dealed with :

M051_SysCtl_Usage

The following example shows how to use the SysCtl API to configure the system clock,enable the relative peripheral,put the processor into sleep mode,and then wake up by Extern Interrupt 0;

 #include "xhw_types.h"
 #include "xhw_memmap.h"
 #include "xcore.h"
 #include "xhw_sysctl.h"
 #include "xsysctl.h"
 #include "xhw_ints.h"
 #include "xgpio.h"
 #include "xhw_nvic.h"
 #include "xhw_gpio.h"

 //*****************************************************************************
 //
 // Enter Sleep Mode function.
 // This function will force the processor enter sleep mode.
 //
 //*****************************************************************************
 void PWRCtl_Standby(void)
 {
     //
     // Enter Puts the processor into deep-sleep mode.
     //
     SysCtlDeepSleep();
    
 }
 //*****************************************************************************
 //
 // brief Init uart to print.
 //
 // details uart config as (115200, 8 data bit, 1 stop bit , no partiy)
 //
 //*****************************************************************************
 
 void TestIOInit(void)
 {
     //
     // Set system clock
     //
     xSysCtlClockSet(50000000, xSYSCTL_OSC_MAIN | xSYSCTL_XTAL_12MHZ);

     xSPinTypeUART(UART0RX,PD0);
     xSPinTypeUART(UART0TX,PD1);

     xSysCtlPeripheralReset(xSYSCTL_PERIPH_UART0);
     xSysCtlPeripheralEnable(xSYSCTL_PERIPH_UART0);
     xSysCtlPeripheralClockSourceSet(xSYSCTL_PERIPH_UART_S_EXT12M,1);


     xUARTConfigSet(UART0_BASE,115200,xUART_CONFIG_WLEN_8 | xUART_CONFIG_STOP_1
                                                          | xUART_CONFIG_PAR_NONE));
     xSysCtlDelay(10000);
 }
 //*****************************************************************************
 //
 // brief print a char.
 //
 // param A char
 //
 // return None.
 //
 //*****************************************************************************
 void TestIOPut(char ch)
 {
     uint8_t c;
     c = ch;
     while((xHWREG(UART_BASE + UART_FSR) & (0x400000))!=0x400000);
     //
     // Write this character to the transmit FIFO.
     //
     xHWREG(UART_BASE + UART_THR) = c;
 }
 
 //*****************************************************************************
 //
 // Wake up mcu from sleep mode function using extern interrupt.
 //
 // This function use extern interrupt to wake up mcu from sleep mode 
 //
 // return None
 //*****************************************************************************
 void PWR_WKUP_Init(void)
 {       
     xIntEnable(INT_EINT1);
     xIntPrioritySet(INT_EINT1, 1);
     GPIODirModeSet(GPIO_PORTB_BASE, GPIO_PIN_15,GPIO_DIR_MODE_IN);
     GPIOPinIntEnable(GPIO_PORTB_BASE, GPIO_PIN_15,GPIO_FALLING_EDGE);
 }
 //*****************************************************************************
 //
 // The main function of the PWR_WKUP 
 //
 //*****************************************************************************
 int main(void)
 {
     //
     //UART initialize
     //          
     TestIOInit();
     PWR_WKUP_Init();

     while(1)
     {
        PWRCtl_Standby();
        TestIOPut('O');
        TestIOPut('K'); 
     }  
 }

Note:

Modules

Detailed Description

Contents

1. SysCtl Physical Block

2. Functional Description

2. API Groups

2.1 SysCtl clock control APIs

2.2 SysCtl Peripharal Control APIs

2.3 SysCtl power control

M051_SysCtl_Usage