Posted on October 19, 2014 at 13:38 Hi, I am trying to output two PWM signals through channels 1 & 3 of TIM3.
I'm using the Nucleo F401RE board, so my MCU is STM32F401RE. I checked the example code included with the HAL and also the code generated by STM32CubeMX. This is my current code:
#include ''stm32f4xx.h''
#include ''stm32f4xx_hal.h''
#include ''stm32f4xx_hal_rcc.h''
#include ''stm32f4xx_hal_gpio.h''
#include ''stm32f4xx_hal_tim.h''
#include ''stm32f4xx_hal_tim_ex.h''
#include ''uart.h''
#include ''xprintf.h''
TIM_HandleTypeDef htim3;
int
main(
void
)
{
UART_init(19200);
xfunc_in = UART_getc;
xfunc_out = UART_putc;
xprintf(
''Initializing GPIO and Timer\n''
);
GPIO_InitTypeDef GPIO_InitStruct;
xprintf(
''1\n''
);
/* Peripheral clock enable */
__GPIOC_CLK_ENABLE();
__TIM3_CLK_ENABLE();
xprintf(
''2\n''
);
/**TIM3 GPIO Configuration
PC6 ------> TIM3_CH1
PC8 ------> TIM3_CH3
*/
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
xprintf(
''3\n''
);
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_OC_InitTypeDef sConfigOC;
TIM_MasterConfigTypeDef sMasterConfig;
htim3.Instance = TIM3;
htim3.Init.Prescaler = 35;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 100;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_Base_Init(&htim3);
xprintf(
''4\n''
);
HAL_TIM_PWM_Init(&htim3);
xprintf(
''6\n''
);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 25;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1);
HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_3);
xprintf(
''7\n''
);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
xprintf(
''8\n''
);
int
i = 0;
while
(1)
{
__HAL_TIM_SetCompare(&htim3, TIM_CHANNEL_1, i++);
if
(i > 1700) i = 0;
HAL_Delay(100);
}
return
0;
}
When I launch the code it stops at the serial checkpoint number 6, so it seems to fail while configuring the PWM channel. When I pause the debug I notice that the
HardFault_Handler(
void
);
function is called.
But if I remove the following line:
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
it happens that the program reaches the checkpoint number 8 and enters the while loop, which makes no sense to me.
Can someone help me? Thanks
