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#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include "usbd_core.h"
#include "cdc_class.h"
#include "cdc_desc.h"
#include "usbd_int.h"
void clkout_config(void)
{
gpio_init_type gpio_init_struct;
/* enable gpio port clock */
crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
/* set default parameter */
gpio_default_para_init(&gpio_init_struct);
/* clkout gpio init */
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
gpio_init_struct.gpio_pins = GPIO_PINS_8;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init(GPIOA, &gpio_init_struct);
/* config clkout division */
crm_clkout_div_set(CRM_CLKOUT_DIV_1);
/* config clkout clock */
crm_clock_out_set(CRM_CLKOUT_USB);
}
int main(void)
{
uint16_t data_len;
uint32_t timeout;
uint8_t send_zero_packet = 0;
/* config nvic priority group */
nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);
/* sclk = 240mhz from hick */
system_clock_config_for_acc();
at32_board_init();
usb_clock48m_select(USB_CLK_HICK);
crm_periph_clock_enable(CRM_USB_PERIPH_CLOCK, TRUE);
nvic_irq_enable(USBFS_L_CAN1_RX0_IRQn, 1, 0);
usbd_core_init(&usb_core_dev, USB, &cdc_class_handler, &cdc_desc_handler, 0);
usbd_connect(&usb_core_dev);
/* acc config */
crm_periph_clock_enable(CRM_ACC_PERIPH_CLOCK, TRUE);
/* enable the acc calibration ready interrupt */
acc_interrupt_enable(ACC_CALRDYIEN_INT, TRUE);
/* enable the acc reference signal lost interrupt */
acc_interrupt_enable(ACC_EIEN_INT, TRUE);
/* config nvic for acc int */
nvic_irq_enable(ACC_IRQn, 2, 0);
/* update the c1\c2\c3 value */
acc_c2_value = 8000;
#ifdef ACC_CAL
acc_write_c1(acc_c2_value - 20);
acc_write_c2(acc_c2_value);
acc_write_c3(acc_c2_value + 20);
#else
acc_write_c1(acc_c2_value - 10);
acc_write_c2(acc_c2_value);
acc_write_c3(acc_c2_value + 10);
#endif
/* open acc calibration */
#if defined(ACC_CAL)
acc_calibration_mode_enable(ACC_CAL_HICKCAL, TRUE);
#elif defined(ACC_TRIM)
acc_calibration_mode_enable(ACC_CAL_HICKTRIM, TRUE);
#endif
while(1)
{
/* get usb vcp receive data */
data_len = usb_vcp_get_rxdata(&usb_core_dev, usb_buffer);
if(data_len > 0 || send_zero_packet == 1)
{
/* bulk transfer is complete when the endpoint does one of the following
1 has transferred exactly the amount of data expected
2 transfers a packet with a payload size less than wMaxPacketSize or transfers a zero-length packet
*/
if(data_len > 0)
send_zero_packet = 1;
if(data_len == 0)
send_zero_packet = 0;
timeout = 5000000;
do
{
/* send data to host */
if(usb_vcp_send_data(&usb_core_dev, usb_buffer, data_len) == SUCCESS)
{
break;
}
}while(timeout --);
}
}
}
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