Somy LPC1114 Eval Board PWM Blinky function tested OK

// ***********************************************************************
// Program     - PWM Blinky
// Description - Blink Somy Board LED PIO0_8 using PWM 
// Build       - 2013.08.10.05
// Date        - 2013aug10hkt1532
// Author      - TL Fong
// Reference   - MIT 6.01SC Intro EE&CS1, <http://ocw.mit.edu/6-01SCS11>
// License     - Creative Commons BY-NC-SA <http://ocw.mit.edu/terms/>
// Hardware    - NXP ARM Cortex M0 LPC1114FBD48/302 (Somy Eval Board)  
// IDE         - MDK-Lite/uVision 4.71, CoLinkEx 1.1, Flash Magic v7.51 
// Manuals     - 
// 1. UM10398 LPC111x/LPC11Cxx User manual R12 2012sep24 Chapter 18
// 2. LPC11xx.h CMSIS Cortex-M0 Core Peripheral Access Layer Header File
//    for NXP LPC11xx/LPC11Cxx V1.10 2010nov24
// Notes       -
// 1. PWM pin configuration 
//      PIO0_8/MISO0/CT16B0_MAT0 = Somy LPC1114 Eval Board P4 Pin 3 
// ***********************************************************************

void testXiaBoardPwmBlinky05()
{
  // Enable System AHB clock for CT16B0 timer (Table 21 bit 7 CT16B0)
  LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 7); // CT16B0 = 1 enables CT16B0

  // Enable System AHB clock for IOCON block (Table 21 bit 16 IOCON)
  LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 16); // IOCON = 1 enable clk for IOCON

  // Set function of PIO0_8 pin (UM10398 Table 79 bits 2:0 FUNC) 
  LPC_IOCON->PIO0_8 &= ~0x7; // FUNC = 0x2 selects function of
  LPC_IOCON->PIO0_8 |=  0x2; //   CT16B0_MAT0 
                
  // Set PWM mode for CT16B0_MAT0,3 (Table 293 bit 0 PWMEN0, bit3 PWMEN3)
  LPC_TMR16B0->PWMC |= 0x9; // PWMENO & PWMEN3 = 1 enable MR0, MR3

  // Set External Match Register (Tables 290, 291) // not sure about this
  LPC_TMR16B0->EMR = (0x3 | 0x1); // bits 4, 5 = 11 toggle, bit 0 = 1 
  
  // Resets timer counter on MR3 match (Table 286 bit 10 MR3R)
  LPC_TMR16B0->MCR |= 0x400; // MR3R = 1 resets counter on MR3 match

  // Set prescale 12000 count of AHB clock  = 240 uS (Table 279 TMR16B0PR)
  LPC_TMR16B0->PR = 12000; // (1/(50,000,000/2) x 12000 = 240 uS

  // Set cycle length (Table 279 TMR16B0MR3, Figure 68)
  LPC_TMR16B0->MR3 = 4000; // 240uS x 4000 = 0.96 == 1 second

  // Set duty cycle (Table 279 TMR16B0MR0, Figure 68)
  LPC_TMR16B0->MR0 = 2000; // 240uS x 2000 == 0.5 second (50% duty cycle)

  // Start timer (Table 279 TMR16B0CTCR bit0 CEn)
  LPC_TMR16B0->TCR |= 0x1; // CEn = 1 enables timer 

  while (1)
  {
// loop forever
  }
}

void testXiaBoardDelayBlinky02()
{
testXiaBoardBlinky01(Led1, OneTime); // Port 1, Pin 8
testXiaBoardBlinky01(Led2, OneTime); // Port 2, Pin 7  
testXiaBoardBlinky01(Led3, OneTime); // Port 2, Pin 8  
testXiaBoardBlinky01(Led4, OneTime); // Port 2, Pin 5
testXiaBoardBlinky01(Led5, OneTime); // Port 0, Pin 8
}

void testXiaBoardPwmBlinky04()
{
initializeXiaBoard01();
testXiaBoardDelayBlinky02(); // delay blink
testXiaBoardPwmBlinky05();   // pwm blink
}

// ***********************************************************************
// Main Function
// ***********************************************************************

int main()
{  
testXiaBoardPwmBlinky04(); // blinks Led 1 to 5 once, then 5 non stop
}

// ***********************************************************************
// End of Program
// ***********************************************************************

// .END