Posted on October 18, 2016 at 05:46Hi,
I'm trying to use the HRTIM for a high resolution simple PWM signal, using HAL. If I set the pulse length in the HRTIM initialise routine, then call SimplePWMStart() then I get the correct PWM output. However, the __HAL_HRTIM_SETCOMPARE macro does not change the output period. Is there some trick to using this macro?
I'm using the STM32F334R8Tx Nucleo board.
<code>
int main(void)
{
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_HRTIM1_Init();
HAL_HRTIM_SimplePWMStart(&hhrtim1,HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA1); // this does start the PWM running
__HAL_HRTIM_SETCOMPARE(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, HRTIM_COMPAREUNIT_1, 0x1000); // DOES NOTHING!!!
/* HRTIM1 init function */
void MX_HRTIM1_Init(void)
{
HRTIM_TimeBaseCfgTypeDef pTimeBaseCfg;
HRTIM_SimplePWMChannelCfgTypeDef pSimplePWMChannelCfg;
hhrtim1.Instance = HRTIM1;
hhrtim1.Init.HRTIMInterruptResquests = HRTIM_IT_NONE;
hhrtim1.Init.SyncOptions = HRTIM_SYNCOPTION_NONE;
if (HAL_HRTIM_Init(&hhrtim1) != HAL_OK)
{
Error_Handler();
}
if (HAL_HRTIM_DLLCalibrationStart(&hhrtim1, HRTIM_CALIBRATIONRATE_14) != HAL_OK)
{
Error_Handler();
}
if (HAL_HRTIM_PollForDLLCalibration(&hhrtim1, 10) != HAL_OK)
{
Error_Handler();
}
pTimeBaseCfg.Period = 0xFFF7;
pTimeBaseCfg.RepetitionCounter = 0x00;
pTimeBaseCfg.PrescalerRatio = HRTIM_PRESCALERRATIO_MUL8;
pTimeBaseCfg.Mode = HRTIM_MODE_CONTINUOUS;
if (HAL_HRTIM_TimeBaseConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, &pTimeBaseCfg) != HAL_OK)
{
Error_Handler();
}
pSimplePWMChannelCfg.Pulse = 0xFFDF;
pSimplePWMChannelCfg.Polarity = HRTIM_OUTPUTPOLARITY_HIGH;
pSimplePWMChannelCfg.IdleLevel = HRTIM_OUTPUTIDLELEVEL_INACTIVE;
if (HAL_HRTIM_SimplePWMChannelConfig(&hhrtim1, HRTIM_TIMERINDEX_TIMER_A, HRTIM_OUTPUT_TA1, &pSimplePWMChannelCfg) != HAL_OK)
{
Error_Handler();
}
HAL_HRTIM_MspPostInit(&hhrtim1);
}
#hrtim
