gd_eval_led_init(LED2); gd_eval_led_init(LED3); gd_eval_led_on(LED2); /* configure the tamper key */ gd_eval_key_init(KEY_TAMPER, KEY_MODE_EXTI);
时间: 2023-08-28 08:05:28 浏览: 75
这段代码的作用是初始化和配置开发板上的LED灯和按键。其中gd_eval_led_init(LED2)和gd_eval_led_init(LED3)分别用于初始化LED2和LED3灯,gd_eval_led_on(LED2)则是将LED2灯点亮。gd_eval_key_init(KEY_TAMPER, KEY_MODE_EXTI)则是用于配置板载的按键,KEY_TAMPER表示选择的按键是板载的Tamper按键,KEY_MODE_EXTI表示使用外部中断模式。这些代码通常用于嵌入式系统中对开发板上的外设进行初始化和配置。
相关问题
void led_djsiao(void) { gd_eval_led_init[LED2]; gd_eval_key_init[KEY_TAMPER,KEY_MODE_GPIO]; }
这段代码存在语法错误,应该是以下的形式:
```
void led_djsiao(void) {
gd_eval_led_init(LED2);
gd_eval_key_init(KEY_TAMPER, KEY_MODE_GPIO);
}
```
假设 `gd_eval_led_init` 和 `gd_eval_key_init` 是函数,需要使用括号 `()` 调用函数。同时, `gd_eval_led_init` 的参数 `LED2` 应该放在括号内。另外,`,` 应该用作参数分隔符,不能用作连接符。
int main(void) { / configure systick / systick_config(); / configure board / bsp_board_config(); / configure GPIO / can_gpio_config(); / initialize CAN and filter */ can_config(); printf("\r\ncommunication test CAN0, please press WAKEUP key to start! \r\n"); can_struct_para_init(CAN_MDSC_STRUCT, &transmit_message); can_struct_para_init(CAN_MDSC_STRUCT, &receive_message); /* initialize transmit message */ transmit_message.rtr = 0; transmit_message.ide = 0; transmit_message.code = CAN_MB_TX_STATUS_DATA; transmit_message.brs = 0; transmit_message.fdf = 0; transmit_message.prio = 0; transmit_message.data_bytes = 8; /* tx message content */ transmit_message.data = (uint32_t *)(tx_data); transmit_message.id = 0xAA; receive_message.rtr = 0; receive_message.ide = 0; receive_message.code = CAN_MB_RX_STATUS_EMPTY; /* rx mailbox */ receive_message.id = 0x55; receive_message.data = (uint32_t *)(rx_data); can_mailbox_config(CAN0, 0, &receive_message); while(1) { /* test whether the WAKEUP key is pressed */ if(0 == gd_eval_key_state_get(KEY_WAKEUP)) { delay_1ms(100); if(0 == gd_eval_key_state_get(KEY_WAKEUP)) { /* transmit message */ can_mailbox_config(CAN1, 1, &transmit_message); printf("\r\nCAN1 transmit data: \r\n"); for(i = 0; i < 8; i++) { printf("%02x\r\n", tx_data[i]); } /* waiting for the WAKEUP key up */ while(0 == gd_eval_key_state_get(KEY_WAKEUP)); } } communication_check(); } }怎么在接收到数据以后再发送接收到的数据
在接收到数据后,您可以在接收循环中添加发送数据的代码。可以像下面这样修改您的代码:
```c
while (1) {
/* test whether the WAKEUP key is pressed */
if (0 == gd_eval_key_state_get(KEY_WAKEUP)) {
delay_1ms(100);
if (0 == gd_eval_key_state_get(KEY_WAKEUP)) {
/* transmit message */
can_mailbox_config(CAN1, 1, &transmit_message);
printf("\r\nCAN1 transmit data: \r\n");
for (i = 0; i < 8; i++) {
printf("%02x\r\n", tx_data[i]);
}
/* waiting for the WAKEUP key up */
while (0 == gd_eval_key_state_get(KEY_WAKEUP));
}
}
// Check if CAN message received
if (can_receive_flag) {
can_receive_flag = 0;
// Process received data here
// Copy received data to transmit message
memcpy(tx_data, rx_data, 8);
/* transmit message */
can_mailbox_config(CAN1, 1, &transmit_message);
printf("\r\nCAN1 transmit data received: \r\n");
for (i = 0; i < 8; i++) {
printf("%02x\r\n", tx_data[i]);
}
}
communication_check();
}
```
以上代码在接收到数据后,将接收到的数据复制到发送数据的数组中,并再次发送给CAN总线。请确保在适当的位置设置`can_receive_flag`,以便在接收到数据时设置该标志。同时,请根据您的具体需求进行相应的数据处理。
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