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#include "gd32f30x.h"
#include <stdio.h>
#include "gd32f307c_eval.h"
#define CAN_BAUDRATE 1000
void nvic_config(void);
void led_config(void);
void can_gpio_config(void);
void can_config(void);
/*!
\brief main function
\param[in] none
\param[out] none
\retval none
*/
int main(void)
{
uint8_t i = 0;
uint32_t timeout = 0xFFFF;
uint8_t transmit_mailbox = 0;
can0_receive_flag = RESET;
can1_receive_flag = RESET;
can0_error_flag = RESET;
can1_error_flag = RESET;
/* configure GPIO */
can_gpio_config();
/* configure NVIC */
nvic_config();
/* configure USART */
gd_eval_com_init(EVAL_COM0);
/* configure Wakeup key or Tamper key */
gd_eval_key_init(KEY_WAKEUP, KEY_MODE_GPIO);
gd_eval_key_init(KEY_TAMPER, KEY_MODE_GPIO);
printf("\r\nGD32F30x dual CAN test, please press Wakeup key or Tamper key to start communication!\r\n");
/* configure leds */
led_config();
gd_eval_led_off(LED2);
gd_eval_led_off(LED3);
gd_eval_led_off(LED4);
gd_eval_led_off(LED5);
/* initialize CAN and filter */
can_config();
/* enable can receive FIFO0 not empty interrupt */
can_interrupt_enable(CAN0, CAN_INT_RFNE0);
can_interrupt_enable(CAN1, CAN_INT_RFNE0);
/* initialize transmit message */
transmit_message.tx_sfid = 0x7ab;
transmit_message.tx_efid = 0x00;
transmit_message.tx_ft = CAN_FT_DATA;
transmit_message.tx_ff = CAN_FF_STANDARD;
transmit_message.tx_dlen = 8;
transmit_message.tx_data[0] = 0x00;
transmit_message.tx_data[1] = 0xA1;
transmit_message.tx_data[2] = 0xA2;
transmit_message.tx_data[3] = 0xA3;
transmit_message.tx_data[4] = 0xA4;
transmit_message.tx_data[5] = 0xA5;
transmit_message.tx_data[6] = 0xA6;
transmit_message.tx_data[7] = 0xA7;
while(1){
/* test whether the Tamper key is pressed */
if(0 == gd_eval_key_state_get(KEY_TAMPER)){
transmit_message.tx_data[0] = 0x55;
transmit_message.tx_data[1] = 0xAA;
printf("\r\n can0 transmit data:");
for(i = 0; i < transmit_message.tx_dlen; i++){
printf(" %02x", transmit_message.tx_data[i]);
}
/* transmit message */
transmit_mailbox = can_message_transmit(CAN0, &transmit_message);
/* waiting for transmit completed */
timeout = 0xFFFF;
while((CAN_TRANSMIT_OK != can_transmit_states(CAN0, transmit_mailbox)) && (0 != timeout)){
timeout--;
}
/* waiting for the Tamper key up */
while(0 == gd_eval_key_state_get(KEY_TAMPER));
}
#ifdef GD32F30X_CL
/* test whether the Wakeup key is pressed */
if(0 == gd_eval_key_state_get(KEY_WAKEUP)){
transmit_message.tx_data[0] = 0xAA;
transmit_message.tx_data[1] = 0x55;
printf("\r\n can1 transmit data:");
for(i = 0; i < transmit_message.tx_dlen; i++){
printf(" %02x", transmit_message.tx_data[i]);
}
/* transmit message */
transmit_mailbox = can_message_transmit(CAN1, &transmit_message);
/* waiting for transmit completed */
timeout = 0xFFFF;
while((CAN_TRANSMIT_OK != can_transmit_states(CAN1, transmit_mailbox)) && (0 != timeout)){
timeout--;
}
/* waiting for the Wakeup key up */
while(0 == gd_eval_key_state_get(KEY_WAKEUP));
}
#endif /* GD32F30X_CL */
/* CAN0 receive data correctly, the received data is printed */
if(SET == can0_receive_flag){
can0_receive_flag = RESET;
printf("\r\n can0 receive data:");
for(i = 0; i < receive_message.rx_dlen; i++){
printf(" %02x", receive_message.rx_data[i]);
}
gd_eval_led_toggle(LED4);
}
#ifdef GD32F30X_CL
/* CAN1 receive data correctly, the received data is printed */
if(SET == can1_receive_flag){
can1_receive_flag = RESET;
gd_eval_led_toggle(LED5);
printf("\r\n can1 receive data:");
for(i = 0; i < receive_message.rx_dlen; i++){
printf(" %02x", receive_message.rx_data[i]);
}
}
#endif /* GD32F30X_CL */
/* CAN0 error */
if(SET == can0_error_flag){
can0_error_flag = RESET;
printf("\r\n can0 communication error");
}
#ifdef GD32F30X_CL
/* CAN1 error */
if(SET == can1_error_flag){
can1_error_flag = RESET;
printf("\r\n can1 communication error");
}
#endif /* GD32F30X_CL */
}
}
void can_config()
{
can_parameter_struct can_parameter;
can_filter_parameter_struct can_filter;
can_struct_para_init(CAN_INIT_STRUCT, &can_parameter);
can_struct_para_init(CAN_FILTER_STRUCT, &can_filter);
/* initialize CAN register */
can_deinit(CAN0);
#ifdef GD32F30X_CL
can_deinit(CAN1);
#endif /* GD32F30X_CL */
/* initialize CAN parameters */
can_parameter.time_triggered = DISABLE;
can_parameter.auto_bus_off_recovery = ENABLE;
can_parameter.auto_wake_up = DISABLE;
can_parameter.auto_retrans = ENABLE;
can_parameter.rec_fifo_overwrite = DISABLE;
can_parameter.trans_fifo_order = DISABLE;
can_parameter.working_mode = CAN_NORMAL_MODE;
can_parameter.resync_jump_width = CAN_BT_SJW_1TQ;
can_parameter.time_segment_1 = CAN_BT_BS1_7TQ;
can_parameter.time_segment_2 = CAN_BT_BS2_2TQ;
/* 1MBps */
#if CAN_BAUDRATE == 1000
can_parameter.prescaler = 6;
/* 500KBps */
#elif CAN_BAUDRATE == 500
can_parameter.prescaler = 12;
/* 250KBps */
#elif CAN_BAUDRATE == 250
can_parameter.prescaler = 24;
/* 125KBps */
#elif CAN_BAUDRATE == 125
can_parameter.prescaler = 48;
/* 100KBps */
#elif CAN_BAUDRATE == 100
can_parameter.prescaler = 60;
/* 50KBps */
#elif CAN_BAUDRATE == 50
can_parameter.prescaler = 120;
/* 20KBps */
#elif CAN_BAUDRATE == 20
can_parameter.prescaler = 300;
#else
#error "please select list can baudrate in private defines in main.c "
#endif
/* initialize CAN */
can_init(CAN0, &can_parameter);
#ifdef GD32F30X_CL
can_init(CAN1, &can_parameter);
#endif /* GD32F30X_CL */
/* initialize filter */
can_filter.filter_number=0;
can_filter.filter_mode = CAN_FILTERMODE_MASK;
can_filter.filter_bits = CAN_FILTERBITS_32BIT;
can_filter.filter_list_high = 0x0000;
can_filter.filter_list_low = 0x0000;
can_filter.filter_mask_high = 0x0000;
can_filter.filter_mask_low = 0x0000;
can_filter.filter_fifo_number = CAN_FIFO0;
can_filter.filter_enable = ENABLE;
can_filter_init(&can_filter);
/* CAN1 filter number */
can_filter.filter_number = 15;
can_filter_init(&can_filter);
}
void nvic_config(void)
{
#ifdef GD32F30X_CL
/* configure CAN0 NVIC */
nvic_irq_enable(CAN0_RX0_IRQn,0,0);
/* configure CAN1 NVIC */
nvic_irq_enable(CAN1_RX0_IRQn,1,1);
#else
nvic_irq_enable(USBD_LP_CAN0_RX0_IRQn,0,0);
#endif /* GD32F30X_CL */
}
void led_config(void)
{
gd_eval_led_init(LED2);
gd_eval_led_init(LED3);
gd_eval_led_init(LED4);
gd_eval_led_init(LED5);
}
void can_gpio_config(void)
{
/* enable CAN clock */
rcu_periph_clock_enable(RCU_CAN0);
#ifdef GD32F30X_CL
rcu_periph_clock_enable(RCU_CAN1);
#endif /* GD32F30X_CL */
rcu_periph_clock_enable(RCU_GPIOB);
rcu_periph_clock_enable(RCU_GPIOD);
rcu_periph_clock_enable(RCU_AF);
/* configure CAN0 GPIO */
gpio_init(GPIOD,GPIO_MODE_IPU,GPIO_OSPEED_50MHZ,GPIO_PIN_0);
gpio_init(GPIOD,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_1);
#ifdef GD32F30X_CL
gpio_pin_remap_config(GPIO_CAN0_FULL_REMAP,ENABLE);
#else
gpio_pin_remap_config(GPIO_CAN_FULL_REMAP,ENABLE);
#endif /* GD32F30X_CL */
#ifdef GD32F30X_CL
/* configure CAN1 GPIO */
gpio_init(GPIOB,GPIO_MODE_IPU,GPIO_OSPEED_50MHZ,GPIO_PIN_5);
gpio_init(GPIOB,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_6);
gpio_pin_remap_config(GPIO_CAN1_REMAP,ENABLE);
#endif /* GD32F30X_CL */
}
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