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#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
int main(void)
{
system_clock_config();
at32_board_init();
/* get system clock */
crm_clocks_freq_get(&crm_clocks_freq_struct);
/* turn led2/led3/led4 on */
at32_led_on(LED2);
at32_led_on(LED3);
at32_led_on(LED4);
/* enable tmr1/gpioa clock */
crm_periph_clock_enable(CRM_TMR1_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
/* timer1 output pin configuration */
gpio_init_struct.gpio_pins = GPIO_PINS_8;
gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_init(GPIOA, &gpio_init_struct);
gpio_init_struct.gpio_pins = GPIO_PINS_9;
gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_init(GPIOA, &gpio_init_struct);
/* hang mode test
1/tmr1 is configured as master timer:
- toggle mode is used
2/tmr1 is configured as slave timer for an external trigger connected
to tmr1 ti2 pin (tmr1 ch2 configured as input pin):
- the tmr1 ti2fp2 is used as trigger input
- rising edge is used to start and stop the tmr1: hang mode.
* the timxclk is fixed to 240 mhz, the prescaler is equal to 2 so the tmrx clock
counter is equal to 80 mhz.
the three timers are running at:
tmrx frequency = tmrx clock counter/ 2*(timx_period + 1) = 500 khz.
*/
/* tmr2 and tmr3 counter mode configuration */
tmr_base_init(TMR1, 79, 2);
tmr_cnt_dir_set(TMR1, TMR_COUNT_UP);
/* tmr1 output mode configuration */
tmr_output_default_para_init(&tmr_output_struct);
tmr_output_struct.oc_mode = TMR_OUTPUT_CONTROL_SWITCH;
tmr_output_struct.oc_output_state = TRUE;
tmr_output_struct.oc_polarity = TMR_OUTPUT_ACTIVE_HIGH;
tmr_output_struct.oc_idle_state = TRUE;
tmr_output_struct.occ_output_state = FALSE;
tmr_output_struct.occ_polarity = TMR_OUTPUT_ACTIVE_HIGH;
tmr_output_struct.occ_idle_state = FALSE;
/* tmr1 channel 1 */
tmr_output_channel_config(TMR1, TMR_SELECT_CHANNEL_1, &tmr_output_struct);
tmr_channel_value_set(TMR1, TMR_SELECT_CHANNEL_1, 40);
/* configure tmr1 channel2 to get hang signal */
tmr_input_default_para_init(&tmr_input_config_struct);
tmr_input_config_struct.input_channel_select = TMR_SELECT_CHANNEL_2;
tmr_input_config_struct.input_mapped_select = TMR_CC_CHANNEL_MAPPED_DIRECT;
tmr_input_config_struct.input_polarity_select = TMR_INPUT_RISING_EDGE;
tmr_input_channel_init(TMR1, &tmr_input_config_struct, TMR_CHANNEL_INPUT_DIV_1);
/* select the tmr1 input trigger: C2IF2 */
tmr_trigger_input_select(TMR1, TMR_SUB_INPUT_SEL_C2DF2);
/* select the slave mode: hang mode */
tmr_sub_mode_select(TMR1, TMR_SUB_HANG_MODE);
/* output enable */
tmr_output_enable(TMR1, TRUE);
/* enable tmr1 */
tmr_counter_enable(TMR1, TRUE);
while(1)
{
}
}
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