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#include "gd32f30x.h"
#include <stdio.h>
#include "gd32f307c_eval.h"
void gpio_config(void);
void timer_config(void);
/*!
\brief configure the GPIO ports
\param[in] none
\param[out] none
\retval none
*/
void gpio_config(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);
/*configure PA6(TIMER2 CH0) as alternate function*/
gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_6);
/*configure PA2(TIMER1 CH2) as alternate function*/
gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_2);
/*configure PA8(TIMER0 CH0) as alternate function*/
gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_8);
}
void timer_config(void)
{
/* timers synchronisation in cascade mode ----------------------------
1/TIMER1 is configured as master timer:
- PWM mode is used
- The TIMER1 update event is used as trigger output
2/TIMER2 is slave for TIMER1 and master for TIMER0,
- PWM mode is used
- The ITR1(TIMER1) is used as input trigger
- external clock mode is used,the counter counts on the rising edges of
the selected trigger.
- the TIMER2 update event is used as trigger output.
3/TIMER0 is slave for TIMER2,
- PWM mode is used
- The ITR2(TIMER2) is used as input trigger
- external clock mode is used,the counter counts on the rising edges of
the selected trigger.
-------------------------------------------------------------------- */
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;
rcu_periph_clock_enable(RCU_TIMER0);
rcu_periph_clock_enable(RCU_TIMER1);
rcu_periph_clock_enable(RCU_TIMER2);
/* TIMER1 configuration */
timer_deinit(TIMER1);
timer_initpara.prescaler = 5999;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 3999;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER1,&timer_initpara);
/* CH1 configuration in PWM0 mode */
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
timer_channel_output_config(TIMER1,TIMER_CH_2,&timer_ocintpara);
timer_channel_output_pulse_value_config(TIMER1,TIMER_CH_2,1999);
timer_channel_output_mode_config(TIMER1,TIMER_CH_2,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER1,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER1);
/* select the master slave mode */
timer_master_slave_mode_config(TIMER1,TIMER_MASTER_SLAVE_MODE_ENABLE);
/* TIMER1 update event is used as trigger output */
timer_master_output_trigger_source_select(TIMER1,TIMER_TRI_OUT_SRC_UPDATE);
/* TIMER2 configuration */
timer_deinit(TIMER2);
timer_initpara.prescaler = 0;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 1;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER2,&timer_initpara);
/* CH0 configuration in PWM0 mode */
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
timer_channel_output_config(TIMER2,TIMER_CH_0,&timer_ocintpara);
timer_channel_output_pulse_value_config(TIMER2,TIMER_CH_0,1);
timer_channel_output_mode_config(TIMER2,TIMER_CH_0,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER2,TIMER_CH_0,TIMER_OC_SHADOW_DISABLE);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER2);
/* slave mode selection: TIMER2 */
timer_slave_mode_select(TIMER2,TIMER_SLAVE_MODE_EXTERNAL0);
timer_input_trigger_source_select(TIMER2,TIMER_SMCFG_TRGSEL_ITI1);
/* select the master slave mode */
timer_master_slave_mode_config(TIMER2,TIMER_MASTER_SLAVE_MODE_ENABLE);
/* TIMER2 update event is used as trigger output */
timer_master_output_trigger_source_select(TIMER2,TIMER_TRI_OUT_SRC_UPDATE);
/* TIMER0 configuration */
timer_deinit(TIMER0);
timer_initpara.prescaler = 0;
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = 1;
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER0,&timer_initpara);
/* CH0 configuration in PWM0 mode */
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;
timer_channel_output_config(TIMER0,TIMER_CH_0,&timer_ocintpara);
timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_0,1);
timer_channel_output_mode_config(TIMER0,TIMER_CH_0,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER0,TIMER_CH_0,TIMER_OC_SHADOW_DISABLE);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER0);
/* TIMER0 output enable */
timer_primary_output_config(TIMER0,ENABLE);
/* slave mode selection: TIMER0 */
timer_slave_mode_select(TIMER0,TIMER_SLAVE_MODE_EXTERNAL0);
timer_input_trigger_source_select(TIMER0,TIMER_SMCFG_TRGSEL_ITI2);
/* TIMER counter enable */
timer_enable(TIMER1);
timer_enable(TIMER2);
timer_enable(TIMER0);
}
int main(void)
{
gpio_config();
timer_config();
while (1);
}
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