Robson Colantonio

Configure SCTimer with PWM Mode and Interrupt using Config Tools on LPC546xx

Discussion created by Robson Colantonio on Aug 26, 2019
Latest reply on Aug 27, 2019 by soledad
Configure SCTimer with PWM Mode and interrupt with pinout togle event using Config Tools 
on LPC546xx. The PWM signal is generated perfectly but the interruption does not occur
or the vector does not point to the routine. Note below the code generated after
compiling config tools.
/***********************************************************************************************************************
 * SCTimer_0 initialization code
 **********************************************************************************************************************/
/* clang-format off */
/* TEXT BELOW IS USED AS SETTING FOR TOOLS *************************************
instance:
- name: 'SCTimer_0'
- type: 'sctimer'
- mode: 'basic'
- type_id: 'sctimer_11116c58643bd290f0e74db0acbc9466'
- functional_group: 'BOARD_InitPeripherals'
- peripheral: 'SCT0'
- config_sets:
  - main:
    - config:
      - clockMode: 'kSCTIMER_System_ClockMode'
      - clockSource: 'SynchronousFunctionClock'
      - clockSourceFreq: 'GetFreq'
      - SCTInputClockSourceFreq: 'custom:0'
      - clockSelect: 'kSCTIMER_Clock_On_Rise_Input_0'
      - enableCounterUnify: 'true'
      - enableBidirection_l: 'true'
      - enableBidirection_h: 'false'
      - prescale_l: '1'
      - prescale_h: '1'
      - outInitState: 'SCTIMER_OUTPUT_7_MASK'
    - enableIRQ: 'true'
    - interrupt:
      - IRQn: 'SCT0_IRQn'
      - enable_priority: 'false'
      - enable_custom_name: 'false'
    - enableLTimer: 'true'
    - enableHTimer: 'false'
    - pwms:
      - 0:
        - output: 'kSCTIMER_Out_7'
        - level: 'kSCTIMER_HighTrue'
        - dutyCyclePercent: '75'
    - pwmMode: 'kSCTIMER_CenterAlignedPwm'
    - pwmFrequency: '20000'
    - events:
      - 0:
        - type: 'kSCTIMER_OutputRiseEvent'
        - output: 'kSCTIMER_Out_7'
        - actions: []
    - states:
      - 0:
        - pwms: 'pwm0'
        - events: 'event0'
 * BE CAREFUL MODIFYING THIS COMMENT - IT IS YAML SETTINGS FOR TOOLS **********/
/* clang-format on */
const sctimer_config_t SCTimer_0_initConfig = {
  .enableCounterUnify = true,
  .clockMode = kSCTIMER_System_ClockMode,
  .clockSelect = kSCTIMER_Clock_On_Rise_Input_0,
  .enableBidirection_l = true,
  .enableBidirection_h = false,
  .prescale_l = 0,
  .prescale_h = 0,
  .outInitState = SCTIMER_OUTPUT_7_MASK
};
const sctimer_pwm_signal_param_t SCTimer_0_pwmSignalsConfig[1] = {
  {
    .output = kSCTIMER_Out_7,
    .level = kSCTIMER_HighTrue,
    .dutyCyclePercent = 75
  }
};
uint32_t SCTimer_0_pwmEvent[1];
uint32_t SCTimer_0_event[1];

void SCTimer_0_init(void) {
  SCTIMER_Init(SCTIMER_0_PERIPHERAL, &SCTimer_0_initConfig);
  /* Initialization of state 0 */
  SCTIMER_SetupPwm(SCTIMER_0_PERIPHERAL, &SCTimer_0_pwmSignalsConfig[0], kSCTIMER_CenterAlignedPwm, 20000U, SCTIMER_0_CLOCK_FREQ, &SCTimer_0_pwmEvent[0]);
  SCTIMER_CreateAndScheduleEvent(SCTIMER_0_PERIPHERAL, kSCTIMER_OutputRiseEvent, 0, kSCTIMER_Out_7, kSCTIMER_Counter_L, &SCTimer_0_event[0]);
  /* Enable interrupt SCT0_IRQn request in the NVIC */
  EnableIRQ(SCTIMER_0_IRQN);
  SCTIMER_StartTimer(SCTIMER_0_PERIPHERAL, kSCTIMER_Counter_L);
}

... and ....

void EV_InterruptSCT0(void)
{  temp_timer++;    if(temp_timer & 0x0001) PIO_test_ON();  else PIO_test_OFF(); }

//
Oscilloscope has no signal at PIO_test, but the pwm 20KHz at PIO_7,
// duty 75% OK. The interruption does not happen


... and ....(main)

BOARD_InitPeripherals();
SCTIMER_SetCallback(SCT0,EV_InterruptSCT0,0);





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