Hi Nordic,
I have written a device driver following the guide as Devicetree HOWTOs, and try to call the driver api in main(), but got unexpected output as below.
I have no idea how this happen.
the main() as below:
#include <zephyr.h>
#include <sys/printk.h>
#include <drivers/sensor.h>
/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS 1000
void main(void)
{
struct sensor_value value;
const struct device *dev = DEVICE_DT_GET_ANY(ads129xr);
if (!device_is_ready(dev)) {
printk("Device %s is not ready\n", dev->name);
return;
}
printk("Hello World! %s\n", CONFIG_BOARD);
while (1) {
printk("Hello World! %s\n", CONFIG_BOARD);
k_msleep(SLEEP_TIME_MS);
sensor_channel_get(dev, SENSOR_CHAN_ALL, &value);
printk("ADS1298XR volt %d.%d\r\n", value.val1, value.val2);
}
}
the driver written as below:
/* ads129xr.c - ADS1294R ADS1296R ADS1298R ECG acqusition spi device */ /* * Copyright (c) 2021 [email protected] * * SPDX-License-Identifier: Apache-2.0 */ #include <kernel.h> #include <device.h> #include <drivers/gpio.h> #include <drivers/sensor.h> #include <sys/printk.h> #include "ads129xr.h" // Compatible with "ti,ads129xr" #define DT_DRV_COMPAT ti_ads129xr struct ads129xr_config { const uint8_t start_pin; //开始AD转换，高电平有效 const uint8_t ready_pin; //AD转换数据准备好，低电平有效 const uint8_t reset_pin; //寄存器重置，低电平有效 const uint8_t pwd_pin; //关闭电源，低电平有效 }; struct ads129xr_data { uint32_t freq; /* initial clock frequency in Hz */ }; int ads129xr_init(const struct device *dev) { // GPIO的配置 // GPIO中断安装 // 旋转编码器GPIO初始化状态读取 // 驱动初始化状态设置 // 驱动线程创建 // 使能中断 return 0; }; static int ads129xr_channel_get(const struct device *dev, enum sensor_channel chan, struct sensor_value *val) { // struct ads129xr_data *drv_data = dev->data; // const struct ads129xr_config *drv_cfg = dev->config; // int32_t acc; printk("Hello World in ADS129XR Driver !!! %s\n", CONFIG_BOARD); if (chan != SENSOR_CHAN_ALL) { return -ENOTSUP; } // acc = drv_data->pulses; // val->val1 = acc * FULL_ANGLE / (drv_cfg->ppr * drv_cfg->spp); // val->val2 = acc * FULL_ANGLE - val->val1 * (drv_cfg->ppr * drv_cfg->spp); // if (val->val2) { // val->val2 *= 1000000; // val->val2 /= (drv_cfg->ppr * drv_cfg->spp); // } val->val1 = 1; val->val2 = 2; return 0; }; static const struct sensor_driver_api ads129xr_driver_api = { // .trigger_set = ads129xr_trigger_set, .channel_get = ads129xr_channel_get, }; //创建管理数据和配置数据的宏 #define ADS129XR_INST(inst) \ static struct ads129xr_data ads129xr_data_##inst = { \ /* initialize RAM values as needed, e.g.: */ \ .freq = DT_INST_PROP(inst, spi_max_frequency), \ }; \ const struct ads129xr_config ads129xr_cfg_##inst = { \ /* initialize ROM values as needed. */ \ .start_pin = DT_INST_GPIO_PIN(inst, start_gpios), \ .ready_pin = DT_INST_GPIO_PIN(inst, drdy_gpios), \ .reset_pin = DT_INST_GPIO_PIN(inst, drdy_gpios), \ .pwd_pin = DT_INST_GPIO_PIN(inst, drdy_gpios), \ }; \ DEVICE_DT_INST_DEFINE(inst, \ ads129xr_init, \ NULL, \ &ads129xr_data_##inst, \ &ads129xr_cfg_##inst, \ POST_KERNEL, \ CONFIG_SENSOR_INIT_PRIORITY, \ &ads129xr_driver_api); /* Call the device creation macro for each instance: */ DT_INST_FOREACH_STATUS_OKAY(ADS129XR_INST);
the full source code can be accessed from https://github.com/anti996sz/ecg-zephyr
