/* * T1_T2_T3_2023_1.c * * 创建: 2023/5/30 22:49:53 * 作者 : XY */ #include <avr/io.h> #include <avr/interrupt.h> #include <avr/sleep.h> void device_init(void) { DDRD |= 0xf0;端口 &= 0x0f;DDRB |= (_BV(PB4)|_BV(PB6));DD RE |= _BV(PE7);} void timer1_init(void) { TCCR1B = 0x00; //stop OCR1AH = 0x3D; //TOP of T1 OCR1AL = 0x08;OCR1BH = 0x3D;OCR1BL = 0x08;TCCR1A = 0x10;TCCR1C = 0x00;TCCR1B = 0x0B;启动计时器 } void timer2_init(void) { TCCR2B = 0x00; //stop ASSR = 0x20; //设置异步模式 OCR2A = 0x80;TCCR2A = 0x42;TCCR2B = 0x06;start } void timer3_init(void) { TCCR3B = 0x00; //stop OCR3AH = 0x3D;OCR3AL = 0x08;TCCR3A = 0x00;TCCR3C = 0x00;TCCR3B = 0x0B;start Timer } ISR(TIMER3_COMPA_vect) { PORTE ^= _BV(PE7); } int main(void) { device_init(); timer1_init(); timer2_init(); timer3_init();TIMSK3 = 0x02;SEI();而 (1) { SMCR |= (0x00<<SM0); sleep_mode(); } }在SMCR |= (0x00<<SM0),SMCR |= (0x03<<SM0),SMCR |= (0x02<<SM0)三种情况下的运行结果
时间: 2024-03-19 13:40:18 浏览: 100
这是一段 AVR 微控制器的代码,主要是对定时器进行初始化和配置。其中,timer1_init() 初始化了 Timer 1,timer2_init() 初始化了 Timer 2,timer3_init() 初始化了 Timer 3。在 main() 函数中,通过调用 device_init() 函数对设备(端口)进行初始化,并通过调用 sleep_mode() 函数将微控制器设置为睡眠模式,以降低功耗。
在 SMCR |= (0x00<<SM0)的情况下,微控制器进入睡眠模式,但不会自动唤醒,需要外部中断或者复位才能唤醒。
在 SMCR |= (0x03<<SM0)的情况下,微控制器进入 Power-down 模式,此时除了引脚外的所有模块都被关闭,可以通过外部中断或者复位唤醒。
在 SMCR |= (0x02<<SM0)的情况下,微控制器进入 Idle 模式,此时只有 CPU 被关闭,其他模块继续运行,可以通过外部中断或者硬件定时器唤醒。
需要注意的是,该代码的运行结果和具体硬件平台相关,不能一概而论。
相关问题
/* * T1_T2_T3_2023_1.c * * Created: 2023/5/30 22:49:53 * Author : XY */ #include <avr/io.h> #include <avr/interrupt.h> #include <avr/sleep.h> void device_init(void) { DDRD |= 0xf0; PORTD &= 0x0f; DDRB |= (_BV(PB4)|_BV(PB6)); DDRE |= _BV(PE7); } void timer1_init(void) { TCCR1B = 0x00; //stop OCR1AH = 0x3D; //TOP of T1 OCR1AL = 0x08; OCR1BH = 0x3D; OCR1BL = 0x08; TCCR1A = 0x10; TCCR1C = 0x00; TCCR1B = 0x0B; //start Timer } void timer2_init(void) { TCCR2B = 0x00; //stop ASSR = 0x20; //set async mode OCR2A = 0x80; TCCR2A = 0x42; TCCR2B = 0x06; //start } void timer3_init(void) { TCCR3B = 0x00; //stop OCR3AH = 0x3D; OCR3AL = 0x08; TCCR3A = 0x00; TCCR3C = 0x00; TCCR3B = 0x0B; //start Timer } ISR(TIMER3_COMPA_vect) { PORTE ^= _BV(PE7); } int main(void) { device_init(); timer1_init(); timer2_init(); timer3_init(); TIMSK3 = 0x02; sei(); while (1) { SMCR |= (0x00<<SM0); sleep_mode(); } }在SMCR |= (0x00<<SM0),SMCR |= (0x00<<SM0),SMCR |= (0x02<<SM0)三种情况下的运行结果
在 SMCR |= (0x00<<SM0)的情况下,MCU 进入 Power-save 模式,此时所有定时器正常工作,LED 灯的亮灭由程序控制。由于程序中没有设定 LED 灯的状态,因此 LED 灯可能会一直亮着或熄灭,具体状态不确定。
在 SMCR |= (0x00<<SM0)的情况下,MCU 仍然进入 Power-save 模式,定时器 T1 和 T3 仍然正常工作,LED 灯的亮灭由定时器控制。定时器 T2 停止工作,LED 灯将保持上一次的状态。由于程序中没有设定 LED 灯的初始状态,因此 LED 灯可能会一直亮着或熄灭,具体状态不确定。
在 SMCR |= (0x02<<SM0)的情况下,MCU 进入 Idle 模式,定时器 T1 和 T3 仍然正常工作,LED 灯的亮灭由定时器控制。定时器 T2 停止工作,LED 灯将保持上一次的状态。由于 MCU 进入 Idle 模式,处理器将停止工作,直到下一个中断出现。因此程序中的 while(1) 循环将不再执行,程序将停留在 sleep_mode() 语句处,直到下一个中断出现。在该模式下,MCU 的功耗比 Power-save 模式低,但是定时器 T2 停止工作,可能会影响系统的实时性能。
insert overwrite table discountdw.dwd_sd_adds_order_bill_inc partition(dt = '2023-06-06') select t1.order_bill_id, t1.counterfoil_no, t1.acceptor, date_format(to_utc_timestamp(cast(t1.expiry_date as bigint) ,'GMT-8'),'YYYY-MM-dd'), t2.company_id, t1.cert_no, t1.company_name, t1.third_order_id, t1.counterfoil_amt/10000, t1.transaction_amt/10000, t1.rate, '3bp' as service_tariffing, ((DATEDIFF(to_utc_timestamp(t1.expiry_date ,'GMT-8'),to_utc_timestamp(t1.transaction_date ,'GMT-8') ) + adjust_days)* 0.0003 *(counterfoil_amt))/ 360 as service_fee, 360 as total_days, DATEDIFF(to_utc_timestamp(t1.expiry_date ,'GMT-8'),to_utc_timestamp(t1.transaction_date ,'GMT-8') ) + adjust_days as modulation_date, t3.channel_type, t3.bank_name, date_format(to_utc_timestamp(cast(t1.transaction_date as bigint) ,'GMT-8'),'YYYY-MM-dd'), t1.order_status_code, t1.order_status_msg, t4.fee_amt, t4.status, t1.tenant_id, t5.revenue, to_utc_timestamp(cast(t1.create_date as bigint) ,'GMT-8'), to_utc_timestamp(cast(t1.update_date as bigint) ,'GMT-8') from (select * from discountdw.ods_adds_order_bill_inc where dt ='2023-06-06' and channel_id=101110004 )t1 left join (select * from mecdw.ods_company_full where platform_id='sdpjw')t2 on t1.cert_no=t2.cert_no and t1.tenant_id=t2.tenant_id left join discountdw.dim_adds_product_full t3 on t1.partner_id=t3.partner_id and t1.product_id=t3.product_id left join (select * from mecdw.dwd_sc_fee_record_full where dt='2023-06-06' and biz_type=2 ) t4 on t1.order_bill_id=t4.third_id left join (select * from discountdw.ods_sd_order_ext_inc where dt='2023-06-06') t5 on t1.order_bill_id=t5.order_bill_id left join sdpjwdw.dim_holiday_info_full t6 on date_format(to_utc_timestamp(t1.expiry_date ,'GMT-8'),'YYYY-MM-dd') = t6.civic_holiday ;
这是一条 SQL 语句,看起来比较长。以下是一些可以考虑优化的建议:
1. 将表名、字段名等缩短,以减少字符数和提高可读性。
2. 将复杂的表连接操作拆分成多个子查询,以降低查询复杂度。
3. 对于一些计算操作,可以考虑使用内置函数或自定义函数,以简化代码并提高可维护性。
4. 对于一些重复的操作,可以将其提取成变量或常量,以减少重复代码。
综上所述,优化后的 SQL 可能类似于以下代码(仅供参考):
```
-- 定义常量
SET adjust_days = 1;
-- 查询订单表
WITH order_data AS (
SELECT
o.order_bill_id,
o.counterfoil_no,
o.acceptor,
DATE_FORMAT(TO_UTC_TIMESTAMP(CAST(o.expiry_date AS BIGINT), 'GMT-8'), 'YYYY-MM-dd') AS expiry_date,
o.cert_no,
o.company_name,
o.third_order_id,
o.counterfoil_amt / 10000 AS counterfoil_amt,
o.transaction_amt / 10000 AS transaction_amt,
o.rate,
'3bp' AS service_tariffing,
((DATEDIFF(TO_UTC_TIMESTAMP(o.expiry_date, 'GMT-8'), TO_UTC_TIMESTAMP(o.transaction_date, 'GMT-8')) + adjust_days) * 0.0003 * (o.counterfoil_amt)) / 360 AS service_fee,
360 AS total_days,
DATEDIFF(TO_UTC_TIMESTAMP(o.expiry_date, 'GMT-8'), TO_UTC_TIMESTAMP(o.transaction_date, 'GMT-8')) + adjust_days AS modulation_date,
o.order_status_code,
o.order_status_msg,
o.tenant_id,
TO_UTC_TIMESTAMP(CAST(o.create_date AS BIGINT), 'GMT-8') AS create_date,
TO_UTC_TIMESTAMP(CAST(o.update_date AS BIGINT), 'GMT-8') AS update_date
FROM discountdw.ods_adds_order_bill_inc o
WHERE o.dt = '2023-06-06' AND o.channel_id = 101110004
),
-- 查询公司表
company_data AS (
SELECT
c.company_id,
c.cert_no,
c.tenant_id
FROM mecdw.ods_company_full c
WHERE c.platform_id = 'sdpjw'
),
-- 查询产品表
product_data AS (
SELECT
p.partner_id,
p.product_id,
p.channel_type,
p.bank_name
FROM discountdw.dim_adds_product_full p
),
-- 查询费用记录表
fee_data AS (
SELECT
f.third_id,
f.fee_amt,
f.status
FROM mecdw.dwd_sc_fee_record_full f
WHERE f.dt = '2023-06-06' AND f.biz_type = 2
),
-- 查询订单扩展信息表
order_ext_data AS (
SELECT
e.order_bill_id,
e.revenue
FROM discountdw.ods_sd_order_ext_inc e
WHERE e.dt = '2023-06-06'
),
-- 查询节假日表
holiday_data AS (
SELECT
h.civic_holiday
FROM sdpjwdw.dim_holiday_info_full h
)
-- 合并数据
INSERT OVERWRITE TABLE discountdw.dwd_sd_adds_order_bill_inc PARTITION(dt = '2023-06-06')
SELECT
o.order_bill_id,
o.counterfoil_no,
o.acceptor,
o.expiry_date,
c.company_id,
o.cert_no,
o.company_name,
o.third_order_id,
o.counterfoil_amt,
o.transaction_amt,
o.rate,
o.service_tariffing,
o.service_fee,
o.total_days,
o.modulation_date,
p.channel_type,
p.bank_name,
DATE_FORMAT(TO_UTC_TIMESTAMP(CAST(o.transaction_date AS BIGINT), 'GMT-8'), 'YYYY-MM-dd'),
o.order_status_code,
o.order_status_msg,
f.fee_amt,
f.status,
o.tenant_id,
e.revenue,
o.create_date,
o.update_date
FROM order_data o
LEFT JOIN company_data c ON o.cert_no = c.cert_no AND o.tenant_id = c.tenant_id
LEFT JOIN product_data p ON o.partner_id = p.partner_id AND o.product_id = p.product_id
LEFT JOIN fee_data f ON o.order_bill_id = f.third_id
LEFT JOIN order_ext_data e ON o.order_bill_id = e.order_bill_id
LEFT JOIN holiday_data h ON o.expiry_date = DATE_FORMAT(TO_UTC_TIMESTAMP(h.civic_holiday, 'GMT-8'), 'YYYY-MM-dd');
```
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