read_result = *((uint32_t *) map);
时间: 2023-10-31 09:06:51 浏览: 160
这段代码是将一个指向某个内存地址的指针 `map` 强制类型转换为 `uint32_t*` 类型的指针,然后取出该指针指向的地址中存储的值,并将其赋值给变量 `read_result`。这里使用了指针的解引用操作符 `*` 来获取指针指向的值。由于 `uint32_t` 类型的变量长度为 4 个字节,所以这里从内存中读取了 4 个字节的数据。需要注意的是,这种类型的强制类型转换可能会导致数据类型不匹配的问题,需要确保被转换的内存地址中存储的数据类型与目标类型兼容。
相关问题
根据以下api和数据结构写出一个将adc转换出来的数据通过GATT发给手机端的代码void ble_controller_init(uint8_t task_priority) int hci_driver_init(void) int bt_enable(bt_ready_cb_t cb)int bt_le_adv_start(const struct bt_le_adv_param *param,const struct bt_data *ad, size_t ad_len, const struct bt_data *sd, size_t sd_len)int bt_le_adv_update_data(const struct bt_data *ad, size_t ad_len,const struct bt_data *sd, size_t sd_len)int bt_le_adv_stop(void)int bt_le_scan_start(const struct bt_le_scan_param *param, bt_le_scan_cb_t cb)int bt_le_scan_stop(void)int bt_le_whitelist_add(const bt_addr_le_t *addr)int bt_le_whitelist_rem(const bt_addr_le_t *addr)int bt_le_whitelist_clear(void)int bt_le_set_chan_map(u8_t chan_map[5])int bt_unpair(u8_t id, const bt_addr_le_t *addr)int bt_conn_get_info(const struct bt_conn *conn, struct bt_conn_info *info)int bt_conn_get_remote_dev_info(struct bt_conn_info *info)int bt_conn_le_param_update(struct bt_conn *conn,const struct bt_le_conn_param *param)int bt_conn_disconnect(struct bt_conn *conn, u8_t reason)struct bt_conn *bt_conn_create_le(const bt_addr_le_t *peer,const struct bt_le_conn_param *param)int bt_conn_create_auto_le(const struct bt_le_conn_param *param)int bt_conn_create_auto_stop(void)int bt_le_set_auto_conn(const bt_addr_le_t *addr,const struct bt_le_conn_param *param)struct bt_conn *bt_conn_create_slave_le(const bt_addr_le_t *peer,const struct bt_le_adv_param *param)int bt_conn_set_security(struct bt_conn *conn, bt_security_t sec)bt_security_t bt_conn_get_security(struct bt_conn *conn)u8_t bt_conn_enc_key_size(struct bt_conn *conn)void bt_conn_cb_register(struct bt_conn_cb *cb)void bt_set_bondable(bool enable)int bt_conn_auth_cb_register(const struct bt_conn_auth_cb *cb)int bt_conn_auth_passkey_entry(struct bt_conn *conn, unsigned int passkey)int bt_conn_auth_cancel(struct bt_conn *conn)int bt_conn_auth_passkey_confirm(struct bt_conn *conn)int bt_conn_auth_pincode_entry(struct bt_conn *conn, const char *pin)int bt_le_read_rssi(u16_t handle,int8_t *rssi)int bt_get_local_address(bt_addr_le_t *adv_addr)int bt_set_tx_pwr(int8_t power)bt_le_adv_parambt_databt_le_scan_parambt_le_conn_parambt_conn,并加入已经写好的adc代码bflb_adc_init(adc, &cfg); bflb_adc_channel_config(adc, chan, TEST_ADC_CHANNEL); for (uint32_t i = 0; i < 10; i++) { bflb_adc_start_conversion(adc); struct bflb_adc_result_s result; uint32_t raw_data = bflb_adc_read_raw(adc); bflb_adc_parse_result(adc, &raw_data, &result, 1); printf("pos chan %d,%d mv \r\n", result.pos_chan, result.millivolt); // char data[20]; // sprintf(data,"ADC result:%d",result.millivolt); // if(conn){ // bt_gatt_notify(conn,&attrs[1],data,sizeof(data)); // } bflb_mtimer_delay_ms(250); }
这段代码需要补充一些信息才能完整地实现将adc转换出来的数据通过GATT发给手机端的功能。以下是可能需要补充的信息:
- GATT服务的UUID和特征的UUID
- GATT服务和特征的定义和初始化
- 连接的回调函数
- 连接对象的定义和初始化
假设以上信息已经准备好了,那么可以根据以下步骤完成代码的编写:
1. 在ble_controller_init函数中初始化GATT服务和特征,并注册连接的回调函数。
2. 在adc转换完成后,将结果存储到一个变量中。
3. 在连接回调函数中,当有连接建立时,获取连接对象,并在连接对象有效的情况下,通过bt_gatt_notify函数将adc结果发送出去。
以下是可能需要补充的代码:
```c
#define ADC_GATT_SERVICE_UUID BT_UUID_DECLARE_16(0x1234)
#define ADC_GATT_CHAR_UUID BT_UUID_DECLARE_16(0x5678)
static struct bt_conn *current_conn;
static struct bt_gatt_attr attrs[] = {
BT_GATT_PRIMARY_SERVICE(ADC_GATT_SERVICE_UUID),
BT_GATT_CHARACTERISTIC(ADC_GATT_CHAR_UUID,
BT_GATT_CHRC_NOTIFY,
BT_GATT_PERM_NONE,
NULL, NULL, NULL),
BT_GATT_CCC(NULL, BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
};
static void connected(struct bt_conn *conn, u8_t err)
{
if (err) {
return;
}
current_conn = bt_conn_ref(conn);
}
static void disconnected(struct bt_conn *conn, u8_t reason)
{
if (current_conn == conn) {
bt_conn_unref(current_conn);
current_conn = NULL;
}
}
static struct bt_conn_cb conn_callbacks = {
.connected = connected,
.disconnected = disconnected,
};
void ble_controller_init(uint8_t task_priority)
{
int err;
err = bt_gatt_service_register(attrs, ARRAY_SIZE(attrs));
if (err) {
return;
}
bt_conn_cb_register(&conn_callbacks);
bt_enable(NULL);
bt_le_adv_start(...);
}
void adc_to_gatt(void)
{
int adc = 0; // assume adc result is stored in this variable
char data[20];
sprintf(data, "ADC result: %d", adc);
if (current_conn) {
bt_gatt_notify(current_conn, &attrs[1], data, sizeof(data));
}
}
```
#include "bflb_adc.h" #include "bflb_mtimer.h" #include "board.h" struct bflb_device_s adc; #define TEST_ADC_CHANNELS 2 #define TEST_COUNT 10 struct bflb_adc_channel_s chan[] = { { .pos_chan = ADC_CHANNEL_2, .neg_chan = ADC_CHANNEL_GND }, { .pos_chan = ADC_CHANNEL_GND, .neg_chan = ADC_CHANNEL_3 }, }; int main(void) { board_init(); board_adc_gpio_init(); adc = bflb_device_get_by_name("adc"); / adc clock = XCLK / 2 / 32 */ struct bflb_adc_config_s cfg; cfg.clk_div = ADC_CLK_DIV_32; cfg.scan_conv_mode = true; cfg.continuous_conv_mode = false; cfg.differential_mode = true; cfg.resolution = ADC_RESOLUTION_16B; cfg.vref = ADC_VREF_3P2V; bflb_adc_init(adc, &cfg); bflb_adc_channel_config(adc, chan, TEST_ADC_CHANNELS); for (uint32_t i = 0; i < TEST_COUNT; i++) { bflb_adc_start_conversion(adc); while (bflb_adc_get_count(adc) < TEST_ADC_CHANNELS) { bflb_mtimer_delay_ms(1); } for (size_t j = 0; j < TEST_ADC_CHANNELS; j++) { struct bflb_adc_result_s result; uint32_t raw_data = bflb_adc_read_raw(adc); printf("raw data:%08x\r\n", raw_data); bflb_adc_parse_result(adc, &raw_data, &result, 1); printf("pos chan %d,neg chan %d,%d mv \r\n", result.pos_chan, result.neg_chan, result.millivolt); } bflb_adc_stop_conversion(adc); bflb_mtimer_delay_ms(100); } while (1) { } }根据以上代码对bl618程序的编写对以下stm32中代码#include "stm32f10x.h" #include "delay.h" #include "FSR.h" #include "usart.h" #include "adc.h" #define PRESS_MIN 20 #define PRESS_MAX 6000 #define VOLTAGE_MIN 150 #define VOLTAGE_MAX 3300 u8 state = 0; u16 val = 0; u16 value_AD = 0; long PRESS_AO = 0; int VOLTAGE_AO = 0; long map(long x, long in_min, long in_max, long out_min, long out_max); int main(void) { delay_init(); NVIC_Configuration(); uart_init(9600); Adc_Init(); delay_ms(1000); printf("Test start\r\n"); while(1) { value_AD = Get_Adc_Average(1,10); VOLTAGE_AO = map(value_AD, 0, 4095, 0, 3300); if(VOLTAGE_AO < VOLTAGE_MIN) { PRESS_AO = 0; } else if(VOLTAGE_AO > VOLTAGE_MAX) { PRESS_AO = PRESS_MAX; } else { PRESS_AO = map(VOLTAGE_AO, VOLTAGE_MIN, VOLTAGE_MAX, PRESS_MIN, PRESS_MAX); } printf("ADÖµ = %d,µçѹ = %d mv,ѹÁ¦ = %ld g\r\n",value_AD,VOLTAGE_AO,PRESS_AO); delay_ms(500); } } long map(long x, long in_min, long in_max, long out_min, long out_max) { return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; }移植到bl618进行改写
以下是将上述STM32代码移植到BL618进行改写后的代码:
```c
#include "bl602.h"
#include "bl_adc.h"
#include "bl_gpio.h"
#include "bl_mtimer.h"
#include "stdio.h"
#define PRESS_MIN 20
#define PRESS_MAX 6000
#define VOLTAGE_MIN 150
#define VOLTAGE_MAX 3300
#define ADC_CHANNEL 0
#define ADC_CLK_DIV 5
#define ADC_RESOLUTION ADC_RESOLUTION_12B
#define ADC_VREF ADC_VREF_3V3
long map(long x, long in_min, long in_max, long out_min, long out_max);
int main(void)
{
bl_mtimer_init();
bl_gpio_enable_output(PIN_11, 1);
bl_adc_init();
bl_adc_config_t cfg = {
.inputMode = ADC_INPUT_SINGLE_END_MODE,
.input = ADC_INPUT_CH0,
.clkDiv = ADC_CLK_DIV,
.resolution = ADC_RESOLUTION,
.refSel = ADC_VREF,
};
bl_adc_channel_config(ADC_CHANNEL, &cfg);
printf("Test start\r\n");
while (1)
{
bl_adc_start();
while (!bl_adc_fifo_data_count())
{
bl_mtimer_delay_us(100);
}
uint16_t value_AD = bl_adc_read_fifo_data();
int VOLTAGE_AO = map(value_AD, 0, 4095, 0, 3300);
long PRESS_AO = 0;
if (VOLTAGE_AO < VOLTAGE_MIN)
{
PRESS_AO = 0;
}
else if (VOLTAGE_AO > VOLTAGE_MAX)
{
PRESS_AO = PRESS_MAX;
}
else
{
PRESS_AO = map(VOLTAGE_AO, VOLTAGE_MIN, VOLTAGE_MAX, PRESS_MIN, PRESS_MAX);
}
printf("AD value = %d, voltage = %d mV, pressure = %ld g\r\n", value_AD, VOLTAGE_AO, PRESS_AO);
bl_mtimer_delay_us(500000);
}
}
long map(long x, long in_min, long in_max, long out_min, long out_max)
{
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
```
在BL618中,需要使用`bl_adc_init()`进行ADC模块的初始化,并通过`bl_adc_channel_config()`配置ADC通道。需要注意的是,BL618的ADC模块不支持差分模式,因此需要将原来的差分模式改为单端模式。在进行ADC转换时,可以使用`bl_adc_start()`触发转换,并通过`bl_adc_fifo_data_count()`和`bl_adc_read_fifo_data()`获取转换结果。此外,由于BL618中没有提供延时函数,需要使用`bl_mtimer_delay_us()`进行延时。
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