/*RX DEV init*/ for(i=0;i< RX_DEV_NUM;i++){ rx_dev[i] = (radiodev *) malloc(sizeof(radiodev)); if(rx_dev[i] == NULL) { printf("rx_dev[%d] malloc failed !\r\n",i); free(rx_dev[i]); }else{ printf("rx_dev[%d] malloc successfully !\r\n",i); } rx_dev[i]->uartfd = open(rx_uart_dev[i], O_RDWR); if (rx_dev[i]->uartfd == -1){ printf("open UART[%s] failed !\r\n",rx_uart_dev[i]); //exit(1); }else{ printf("open UART[%s] successfully !\r\n",rx_uart_dev[i]); } uart_init_ret = UART_Set(rx_dev[i]->uartfd,115200,0,8,1,'N'); if (uart_init_ret == 1) { printf("uart [%s] init OK \r\n",rx_uart_dev[i]); } else { printf("uart [%s] init FAIL \r\n",rx_uart_dev[i]); } }
时间: 2024-03-29 19:38:42 浏览: 125
这段代码进行了以下操作:
- 通过 for 循环,对 RX_DEV_NUM 个射频设备进行初始化。
- 使用 malloc 函数分配空间,为 rx_dev 数组中的每个元素分配一个 radiodev 结构体大小的空间。如果分配成功,则在控制台输出 "rx_dev[i] malloc successfully !",否则输出 "rx_dev[i] malloc failed !"。
- 调用 open 函数打开对应的串口设备,将返回的文件描述符保存在 rx_dev[i]->uartfd 中。如果打开失败,则在控制台输出 "open UART[%s] failed !",否则输出 "open UART[%s] successfully !"。
- 调用 UART_Set 函数初始化串口设备的波特率、数据位、停止位、校验位等参数。如果初始化成功,则在控制台输出 "uart [%s] init OK",否则输出 "uart [%s] init FAIL"。
需要注意的是,这段代码只是对射频设备进行了初始化,后续需要调用其他函数进行具体的操作,例如发送和接收数据等。
相关问题
ESP32-C3, esp-idf 4.3.5,如果想启用SPI2_HOST的dma功能控制ch623应该怎么配置
要启用ESP32-C3的SPI2_HOST DMA功能并控制CH623,您需要进行以下配置:
1. 首先,您需要使用`esp_spi_flash_init`函数初始化SPI外设。此函数将初始化SPI总线并分配DMA通道。
2. 然后,您需要使用`spi_bus_add_device_dma`函数将SPI设备添加到SPI总线上,并启用DMA传输。在此函数中,您需要指定SPI总线的编号、SPI设备的配置(如时钟速度、数据位数等)以及DMA通道的编号。请注意,DMA通道编号必须与DMA控制器支持的通道数量相匹配。
3. 接下来,您需要配置CH623的寄存器。 CH623的寄存器可以使用SPI总线进行访问。首先,您需要设置CS引脚,然后发送两个字节的命令字和数据字节到CH623。您可以使用`spi_device_transmit`函数发送此命令。
4. 最后,您可以使用`spi_device_queue_trans_dma`函数启动DMA传输。在此函数中,您需要指定要传输的数据缓冲区、数据长度以及DMA传输完成后要调用的回调函数。请注意,在DMA模式下,数据缓冲区必须位于DMA可访问的内存区域中。
以下是一个实现SPI2_HOST DMA传输并控制CH623的示例代码片段:
```c
#include "driver/spi_master.h"
#include "esp_spi_flash.h"
#define CH623_CS_GPIO 16
void app_main()
{
// 初始化SPI外设
esp_err_t ret = esp_spi_flash_init();
assert(ret == ESP_OK);
// 添加SPI设备并启用DMA传输
spi_device_handle_t spi;
spi_bus_config_t bus_cfg = {
.miso_io_num = -1,
.mosi_io_num = 18,
.sclk_io_num = 19,
.quadwp_io_num = -1,
.quadhd_io_num = -1,
.max_transfer_sz = 4096,
.flags = SPICOMMON_BUSFLAG_MASTER,
.intr_flags = 0,
};
spi_device_interface_config_t dev_cfg = {
.clock_speed_hz = 1 * 1000 * 1000,
.mode = 0,
.spics_io_num = CH623_CS_GPIO,
.queue_size = 1,
.flags = SPI_DEVICE_HALFDUPLEX,
.command_bits = 0,
.address_bits = 0,
.dummy_bits = 0,
.cs_ena_pretrans = 0,
.cs_ena_posttrans = 0,
.pre_cb = NULL,
.post_cb = NULL,
.input_delay_ns = 0,
.output_delay_ns = 0,
};
ret = spi_bus_add_device_dma(SPI2_HOST, &bus_cfg, &dev_cfg, 1, &spi);
assert(ret == ESP_OK);
// 配置CH623寄存器
uint8_t cmd_data[] = {0x06, 0x02}; // 命令字0x06表示写寄存器,寄存器地址0x02表示输出控制寄存器
spi_transaction_t trans = {
.tx_buffer = cmd_data,
.rx_buffer = NULL,
.length = 8 * sizeof(cmd_data),
.user = (void*)0,
};
gpio_set_direction(CH623_CS_GPIO, GPIO_MODE_OUTPUT);
gpio_set_level(CH623_CS_GPIO, 0);
ret = spi_device_transmit(spi, &trans);
assert(ret == ESP_OK);
gpio_set_level(CH623_CS_GPIO, 1);
// 启动DMA传输
uint8_t tx_data[256] = {0xA5};
uint8_t rx_data[256] = {0};
spi_transaction_t trans = {
.tx_buffer = tx_data,
.rx_buffer = rx_data,
.length = 8 * sizeof(tx_data),
.user = (void*)0,
};
ret = spi_device_queue_trans_dma(spi, &trans, portMAX_DELAY);
assert(ret == ESP_OK);
}
```
请注意,此示例代码仅用于说明如何使用ESP32-C3的SPI2_HOST DMA功能并控制CH623。您需要根据自己的应用场景进行适当的修改和优化。
用dpdk写一个网口收包的示例程序。
以下是一个简单的DPDK示例程序,用于网口收包:
```c
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <stdbool.h>
#include <rte_eal.h>
#include <rte_ethdev.h>
#include <rte_mbuf.h>
#define RX_RING_SIZE 128
#define NUM_MBUFS 8191
#define MBUF_CACHE_SIZE 250
#define BURST_SIZE 32
static const struct rte_eth_conf port_conf_default = {
.rxmode = {
.max_rx_pkt_len = ETHER_MAX_LEN,
},
};
int main(int argc, char *argv[]) {
int ret;
uint16_t nb_ports;
uint16_t portid;
struct rte_mempool *mbuf_pool;
struct rte_eth_conf port_conf = port_conf_default;
struct rte_eth_dev_info dev_info;
struct rte_eth_rxconf rxq_conf;
struct rte_eth_dev_tx_buffer *tx_buffer;
/* Initialize the Environment Abstraction Layer (EAL). */
ret = rte_eal_init(argc, argv);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Error with EAL initialization\n");
argc -= ret;
argv += ret;
/* Check that there is at least one port available. */
nb_ports = rte_eth_dev_count_avail();
if (nb_ports < 1)
rte_exit(EXIT_FAILURE, "Error: no ports available\n");
/* Configure the first Ethernet device. */
portid = 0;
ret = rte_eth_dev_configure(portid, 1, 1, &port_conf);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Error configuring the Ethernet device\n");
/* Get the device information. */
rte_eth_dev_info_get(portid, &dev_info);
/* Allocate a mbuf pool. */
mbuf_pool = rte_pktmbuf_pool_create("MBUF_POOL", NUM_MBUFS,
MBUF_CACHE_SIZE, 0, RTE_MBUF_DEFAULT_BUF_SIZE, rte_socket_id());
if (mbuf_pool == NULL)
rte_exit(EXIT_FAILURE, "Cannot create mbuf pool\n");
/* Configure the Ethernet device RX queue. */
rxq_conf = dev_info.default_rxconf;
rxq_conf.rx_drop_en = 1;
ret = rte_eth_rx_queue_setup(portid, 0, RX_RING_SIZE,
rte_eth_dev_socket_id(portid), &rxq_conf, mbuf_pool);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Cannot configure RX queue\n");
/* Start the Ethernet device. */
ret = rte_eth_dev_start(portid);
if (ret < 0)
rte_exit(EXIT_FAILURE, "Cannot start Ethernet device\n");
/* Enable RX in promiscuous mode for the Ethernet device. */
rte_eth_promiscuous_enable(portid);
/* Initialize the transmit buffer. */
tx_buffer = rte_zmalloc_socket("tx_buffer", RTE_ETH_TX_BUFFER_SIZE(BURST_SIZE), 0,
rte_eth_dev_socket_id(portid));
if (tx_buffer == NULL)
rte_exit(EXIT_FAILURE, "Cannot allocate transmit buffer\n");
rte_eth_tx_buffer_init(tx_buffer, BURST_SIZE);
/* Receive and transmit packets. */
struct rte_mbuf *bufs[BURST_SIZE];
while (true) {
const uint16_t nb_rx = rte_eth_rx_burst(portid, 0, bufs, BURST_SIZE);
if (nb_rx == 0)
continue;
for (uint16_t i = 0; i < nb_rx; i++) {
struct rte_mbuf *buf = bufs[i];
/* Process the packet here. */
rte_pktmbuf_free(buf);
}
}
return 0;
}
```
此示例程序初始化EAL、配置和启动第一个以太网设备、创建mbuf池、配置RX队列、启用混杂模式并接收和处理包。可以使用以下命令编译此程序:
```
$ gcc -o example example.c -I /usr/include/dpdk -L /usr/lib -ldpdk
```
该程序需要在root权限下运行。
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