96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
#include "app_config.h"
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#include "system/includes.h"
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#include "device/device.h"
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#include "asm/spi.h"
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#include "device/gpio.h"
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#define SPI_CS IO_PORTA_00
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//定义中断回调函数,发送完成和接收完成会回调该函数
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void spi_irq_cb(void *priv, u8 **data, u32 *len)
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{
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putchar('@');
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}
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void spi_cs(char val)
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{
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gpio_direction_output(SPI_CS, val);
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}
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static void spi_test_task(void *p)
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{
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char *buf = NULL;
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void *spi_hdl = NULL;
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int ret;
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//1.打开spi设备
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spi_hdl = dev_open("spi1", NULL);
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if (!spi_hdl) {
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printf("spi open err \n");
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goto exit;
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}
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//2.注册回调函数
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struct spi_cb cb;
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cb.cb_func = spi_irq_cb;//回调函数
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cb.cb_priv = NULL;//回调函数的第一个私有参数
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dev_ioctl(spi_hdl, IOCTL_SPI_SET_CB, (u32)&cb);
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dev_ioctl(spi_hdl, IOCTL_SPI_SET_USE_SEM, 0);//等待数据时，用信号量等待，不用则为抢占查询硬件中断标记，建议应信号量等待
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//3.发送一个字节，有发送字节的board.c需配置为双向莫模式（使用DO和DI数据线）
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u8 data = 0x12;
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spi_cs(0);
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dev_ioctl(spi_hdl, IOCTL_SPI_SEND_BYTE, data);//发送一个字节
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spi_cs(1);
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os_time_dly(100);
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//4.读取一个字节
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spi_cs(0);
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dev_ioctl(spi_hdl, IOCTL_SPI_READ_BYTE, &data);//读取一个字节
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spi_cs(1);
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os_time_dly(100);
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buf = malloc(1024);
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if (!buf) {
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printf("err spi no buf \n");
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goto exit;
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}
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//4.发送1024字节
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spi_cs(0);
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ret = dev_write(spi_hdl, buf, 1024);
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spi_cs(1);
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os_time_dly(100);
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while (1) {
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spi_cs(0);
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ret = dev_read(spi_hdl, buf, 1024);
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spi_cs(1);
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if (ret == 0) {//返回值=0则已经读取到数据
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//6. 数据存在buf，长度为1024
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//todo
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put_buf(buf, 1024);//打印数据
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}
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os_time_dly(100);
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}
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exit:
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if (buf) { //释放内存
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free(buf);
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}
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if (spi_hdl) { //关闭spi设备
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dev_close(spi_hdl);
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}
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while (1) { //等待其他任务杀此任务
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os_time_dly(100);
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}
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}
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static int c_main(void)
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{
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os_task_create(spi_test_task, NULL, 22, 1000, 0, "spi_test_task");
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return 0;
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}
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late_initcall(c_main);
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