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

robsongordo2017 — Mon, 26 Aug 2019 08:30:09 GMT

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);

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

soledad — Tue, 27 Aug 2019 18:21:03 GMT

Please check the updates in the following thread:

https://community.nxp.com/thread/511273

Regards

Soledad

topic Re: Configure SCTimer with PWM Mode and Interrupt using Config Tools on LPC546xx in LPC Microcontrollers

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

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