米家蓝牙温湿度计2-拆解报告，固件重定制

#include <stdint.h>
#include "tl_common.h"
#include "drivers.h"
#include "stack/ble/ble.h"
#include "vendor/common/user_config.h"
#include "i2c.h"
extern void user_init_normal();
extern void user_init_deepRetn();
extern void main_loop (void);
_attribute_ram_code_ void irq_handler(void)
{
	irq_blt_sdk_handler();
}

_attribute_ram_code_ int main (void)    //must run in ramcode
{
	blc_pm_select_internal_32k_crystal();
	cpu_wakeup_init();
	int deepRetWakeUp = pm_is_MCU_deepRetentionWakeup();  //MCU deep retention wakeUp
	rf_drv_init(RF_MODE_BLE_1M);
	gpio_init( !deepRetWakeUp );  //analog resistance will keep available in deepSleep mode, so no need initialize again
#if (CLOCK_SYS_CLOCK_HZ == 16000000)
	clock_init(SYS_CLK_16M_Crystal);
#elif (CLOCK_SYS_CLOCK_HZ == 24000000)
	clock_init(SYS_CLK_24M_Crystal);
#endif
	blc_app_loadCustomizedParameters();
	
	init_i2c();
	if( deepRetWakeUp ){
		user_init_deepRetn ();
	}
	else{
		user_init_normal ();
	}	
    irq_enable();
	while (1) {
		main_loop ();
	}
}

read_sensor(&temp,&humi,true);		
		temp += temp_offset;
		humi += humi_offset;	
		if(temp_C_or_F){
			show_temp_symbol(2);
			show_big_number(((((temp*10)/5)*9)+3200)/10,1);//convert C to F
		}else{
			show_temp_symbol(1);
			show_big_number(temp,1);
		}
        
		if(!show_batt_enabled)show_batt_or_humi = true;
		if(show_batt_or_humi){//Change between Humidity displaying and battery level
			show_small_number(humi,1);	
			show_battery_symbol(0);
		}else{
			show_small_number((battery_level==100)?99:battery_level,1);
			show_battery_symbol(1);
		}
·······
		
		if(comfort_smiley) {
			if(is_comfort(temp * 10, humi * 100)){
				show_smiley(1);
			} else {
				show_smiley(2);
			}
		}

		if(blinking_smiley){//If Smiley should blink do it
		last_smiley=!last_smiley;
		show_smiley(last_smiley);
		}
		update_lcd();
	}

const uint8_t sens_wakeup[] = {0x35,0x17};
const uint8_t sens_sleep[] = {0xB0,0x98};
const uint8_t sens_reset[] = {0x80,0x5D};
void read_sensor(int16_t *temp, uint16_t *humi){
	send_i2c(0xE0,sens_wakeup, sizeof(sens_wakeup));	
	sleep_us(240);
	uint8_t read_buff[5];
	i2c_set_id(0xE0);
	i2c_read_series(0x7CA2, 2, (uint8_t*)read_buff,  5);
	send_i2c(0xE0,sens_sleep, sizeof(sens_sleep));
	
    *temp = ((1750*(read_buff[0]<<8 | read_buff[1]))>>16)-450;
    *humi =  (100 *(read_buff[3] << 8 | read_buff[4]))>>16;
}

_attribute_ram_code_ uint16_t get_battery_mv()
{
	uint16_t temp;
	int i,j;
	if(!adc_hw_initialized){
		adc_hw_initialized = 1;
		adc_bat_init();
	}
	adc_reset_adc_module();
	u32 t0 = clock_time();

	uint16_t adc_sample[8] = {0};
	u32 adc_result;
	for(i=0;i<8;i++){
		adc_dat_buf[i] = 0;
	}
	while(!clock_time_exceed(t0, 25));
	adc_config_misc_channel_buf((uint16_t *)adc_dat_buf, 8<<2);
	dfifo_enable_dfifo2();
	
	for(i=0;i<8;i++){
		while(!adc_dat_buf[i]);
		if(adc_dat_buf[i] & BIT(13)){
			adc_sample[i] = 0;
		}
		else{
			adc_sample[i] = ((uint16_t)adc_dat_buf[i] & 0x1FFF);
		}
		if(i){
			if(adc_sample[i] < adc_sample[i-1]){
				temp = adc_sample[i];
				adc_sample[i] = adc_sample[i-1];
				for(j=i-1;j>=0 && adc_sample[j] > temp;j--){
					adc_sample[j+1] = adc_sample[j];
				}
				adc_sample[j+1] = temp;
			}
		}
	}
	dfifo_disable_dfifo2();
	u32 adc_average = (adc_sample[2] + adc_sample[3] + adc_sample[4] + adc_sample[5])/4;
	adc_result = adc_average;
	batt_vol_mv  = (adc_result * adc_vref_cfg.adc_vref)>>10;
	
	
return batt_vol_mv;
}

对TLSR8251编程，增加“温度超过30°C时闪烁LED报警”功能。保持原有显示、数据上传功能不变。

http://shyboy.oss-cn-shenzhen.aliyuncs.com/readonly/tc32_win.rar

#include "tl_common.h"
#include "drivers.h"
#include "vendor/common/user_config.h"
#include "app_config.h"

#include "drivers/8258/gpio_8258.h"

gpio_set_func(GPIO_PD7, AS_GPIO);

gpio_set_output_en(GPIO_PD7, 1);

	gpio_write(GPIO_PD7, 1);
	sleep_ms(100);
	gpio_write(GPIO_PD7, 0);
	sleep_ms(100);

		if (last_temp>30)
		{
			gpio_write(GPIO_PD7, 1);
			sleep_ms(10);
			gpio_write(GPIO_PD7, 0);
		}