//******************************************************************************************
//   Project      :  STM8S105C6T6 Sample Program (STM8S-Discovery)
//   Program Name :
//   Programer    :
//   Create date  :  Version 1.0    H24.10.09
//   History      :
//   Laungage     :  STM8Cosmic C Launguage 
//******************************************************************************************
//   Description
//       CCO :  PE0
//
//******************************************************************************************
#include "iostm8s.h"
//#include "iostm8s105.h"

void Init_CCO(unsigned char);

#define  PI_CCO_fHSIDIV     0b00000000
#define  PI_CCO_fLSI        0b00000010
#define  PI_CCO_fHSE        0b00000100
#define  PI_CCO_fCPU        0b00001000
#define  PI_CCO_fCPU2       0b00001010
#define  PI_CCO_fCPU4       0b00001100
#define  PI_CCO_fCPU8       0b00001110
#define  PI_CCO_fCPU16      0b00010000
#define  PI_CCO_fCPU32      0b00010010
#define  PI_CCO_fCPU64      0b00010100
#define  PI_CCO_fHSI        0b00010110
#define  PI_CCO_fMASTER     0b00011000

int main(void) {

// ********************
//  1.Initialized
// ********************
//  (1)Define GPIO (CCO:PE0)
//    For Alternate Function input, you should select floating or pull-up input configuration in the DDR and CR1 registers. 
//    Alternate function outputs provide a direct path from a peripheral to an output or to an I/O pad, 
//    taking precedence over the port bit in the data output latch register (Px_ODR) and forcing the Px_DDR corresponding bit to 1.
//    An alternate function output can be push-pull or pseudo-open drain depending on the peripheral and 
//    Control register 1 (Px_CR1) and slope can be controlled depending on the Control register 2 (Px_CR2) values.
    PE_DDR = 0b00000001;   
    PE_CR1 = 0b00000001;
//  PE_CR2 = 0b00000001;
 
//  (2)Initialized CCO 
    Init_CCO(PI_CCO_fCPU);

// ********************
//  2.Main
// ********************
    while(1);
}

//******************************************************************************************
//   Function Name : Init_CCO
//   Title         : Initialized CCO 
//   Input         :
//   Output        :
//   Description   :
//******************************************************************************************
void Init_CCO(unsigned char cco_sel)
{
// ***************************************
//  CLK_CCOR(Configurable clock output register)
// ***************************************
//    CLK_CCOR[7] Reserved, must be kept cleared.
//    CLK_CCOR[6] CCOBSY: Configurable clock output busy
//         This bit is set and cleared by hardware. 
//         It indicates that the selected CCO clock source is being switched-on and stabilized. 
//         While CCOBSY is set, the CCOSEL bits are write-protected. 
//         CCOBSY remains set until the CCO clock is enabled.
//            0: CCO clock not busy
//            1: CCO clock busy
//    CLK_CCOR[5] CCORDY: Configurable clock output ready
//         This bit is set and cleared by hardware. It indicates that the CCO clock is being output.
//            0: CCO clock not available
//            1: CCO clock available
//    CLK_CCOR[4:1] CCOSEL[3:0]: Configurable clock output selection.
//         These bits are written by software to select the source of the output clock available on the CLK_CCO pin. 
//         They are write-protected when CCOBSY is set.
//            0000: fHSIDIV,    0001: fLSI,    0010: fHSE,    0011: Reserved,    0100: fCPU,    0101: fCPU/2,
//            0110: fCPU/4,     0111: fCPU/8,  1000: fCPU/16, 1001: fCPU/32,     1010: fCPU/64,  1011: fHSI,
//            1100: fMASTER,    1101: fCPU,    1110: fCPU,    1111: fCPU
//    CLK_CCOR[0] CCOEN: Configurable clock output enable
//         This bit is set and cleared by software.
//            0: CCO clock output disabled
//            1: CCO clock output enabled

    CLK_CCOR  = cco_sel;
    CLK_CCOR |= 0b00000001;
}