esp-idf 4.3.5,ESP32-C3,spi 作为master,控制ch623刷卡芯片,给个参考程序
时间: 2024-02-24 12:58:31 浏览: 33
好的,以下是一个基本的参考程序,用于实现ESP32-C3作为SPI Master控制ch623刷卡芯片:
```c
#include "driver/spi_master.h"
#include "esp_err.h"
// SPI总线配置参数
#define SPI_BUS HSPI_HOST
#define SPI_FREQ 1000000
#define SPI_MODE 0
#define SPI_MSBFIRST 1
// ch623芯片控制命令
#define CMD_RESET 0x01
#define CMD_READ 0x02
// ch623芯片寄存器地址
#define REG_STATUS 0x00
#define REG_DATA 0x01
// ch623芯片状态位定义
#define STATUS_READY 0x01
#define STATUS_ERROR 0x02
#define STATUS_EMPTY 0x04
#define STATUS_FULL 0x08
// SPI总线句柄
spi_device_handle_t spi_dev;
// 初始化SPI总线
void spi_master_init(void)
{
esp_err_t ret;
spi_bus_config_t buscfg = {
.miso_io_num = 19,
.mosi_io_num = 23,
.sclk_io_num = 18,
.quadwp_io_num = -1,
.quadhd_io_num = -1,
.max_transfer_sz = 0,
};
spi_device_interface_config_t devcfg = {
.command_bits = 8,
.address_bits = 8,
.dummy_bits = 0,
.mode = SPI_MODE,
.duty_cycle_pos = 128,
.cs_ena_posttrans = 3,
.cs_ena_pretrans = 0,
.clock_speed_hz = SPI_FREQ,
.input_delay_ns = 0,
.spics_io_num = 5,
.flags = 0,
.queue_size = 1,
.pre_cb = NULL,
.post_cb = NULL,
.tx_buffer = NULL,
.rx_buffer = NULL,
};
ret = spi_bus_initialize(SPI_BUS, &buscfg, 1);
ESP_ERROR_CHECK(ret);
ret = spi_bus_add_device(SPI_BUS, &devcfg, &spi_dev);
ESP_ERROR_CHECK(ret);
}
// ch623芯片复位
void ch623_reset(void)
{
esp_err_t ret;
uint8_t cmd[2] = {CMD_RESET, 0};
spi_transaction_t t = {
.length = 16,
.tx_data = cmd,
};
ret = spi_device_transmit(spi_dev, &t);
ESP_ERROR_CHECK(ret);
}
// ch623芯片读取数据
void ch623_read(uint8_t *buf, uint32_t len)
{
esp_err_t ret;
uint8_t cmd[2] = {CMD_READ, REG_DATA};
spi_transaction_t t = {
.length = len * 8,
.tx_data = cmd,
.rx_data = buf,
};
ret = spi_device_transmit(spi_dev, &t);
ESP_ERROR_CHECK(ret);
}
// 等待ch623芯片空闲
void ch623_wait_ready(void)
{
uint8_t status = 0;
do {
ch623_read(&status, 1);
} while ((status & STATUS_READY) == 0);
}
void app_main(void)
{
uint8_t buf[16];
spi_master_init();
ch623_reset();
ch623_wait_ready();
ch623_read(buf, 16);
// 处理读取的数据
}
```
以上代码中,`spi_master_init()`函数用于初始化SPI总线,并创建一个SPI设备句柄;`ch623_reset()`函数用于向ch623芯片发送复位命令;`ch623_read()`函数用于从ch623芯片读取数据;`ch623_wait_ready()`函数用于等待ch623芯片空闲,以便进行读写操作。你可以根据具体的应用场景,修改这些函数的参数和实现细节,以满足自己的需求。