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SIMCOM-SIM300-AT-COMMAND
SIMCOM公司的SIM300的AT指令中文翻译(SIMCOM SIM 300 AT COMMAND chinese manual)
- 2013-10-09 11:33:23下载
- 积分：1
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使用STM32控制无源蜂鸣器发声播放音乐
利用GPIO控制无源蜂鸣器发声，播放音乐。使用SysTick延时，使用位带操作寻址IO口引脚。(GPIO is used to control the voice of passive buzzer and play music. Use SysTick delay, use bit band operation to address IO pins.)
- 2020-06-17 10:20:02下载
- 积分：1
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ZStack-CC2530-2.5.1a-BMP180
基于zigbee技术CC2530 开发采集大气压(Development and Collection of Atmospheric Pressure Based on Zigbee Technology CC2530)
- 2020-06-22 22:00:01下载
- 积分：1
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PWM-controlling-algorithm
空调压缩机变频控制算法，与直流无刷永磁电机相关，与节能相关。(PWM control algorithm of air-conditioner s condenser )
- 2015-02-02 13:03:50下载
- 积分：1
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【19】DMA PWM WS2812 GPIO输出16组
STM32作为主控芯片，72Mhz，利用DMA+PWM实现驱动WS2812，创建16个并行800kBit / s数据流的想法如下：
使用定时器每1.25us创建一个800kHz的时基和一个DMA请求。
使用2个比较模块在低位时间（350ns）和高位时间（700ns）下创建DMA请求
1.25us DMA请求将GPIO端口的所有位设置为高电平
350ns DMA请求将数据从帧缓冲区传输到GPIO端口。如果该位为0，GPIO引脚将变为低电平，否则将保持高电平。
700ns DMA请求将所有GPIO引脚设置为低电平。
重复步骤1到3，直到发送所有位。
这产生脉冲周期为1.25us，脉冲宽度为350ns或700ns的脉冲流，具体取决于脉冲表示的位值，通过DMA将数据传输到GPIO端口意味着每16个LED每位需要一个字（两个字节）。每个LED 24位，每16个LED 24个字（48个字节）。(The idea to create 16 parallel 800kBit/s data streams is the following:
Use a Timer to create an 800kHz time base and a DMA request every 1.25us.
Use 2 compare modules to create DMA requests at the low bit time (350ns) and the high bit time (700ns)
The 1.25us DMA request sets all bits of the GPIO port high
The 350ns DMA request transfers the data from the frame buffer to the GPIO port. If the bit is a 0, the GPIO pin will go low, otherwise it will stay high.
The 700ns DMA request sets all GPIO pins low.
Repeat steps 1 to 3 until all bits have been transmitted.
This creates a stream of pulses with a pulse period of 1.25us and a pulse width of either 350ns or 700ns depending on the bit value the pulse represents.
Transferring the data via DMA to the GPIO port means that per 16 LEDs one half word (two bytes) is needed per bit. At 24 bits per LED that makes 24 half words (48 bytes) per 16 LEDs.)
- 2020-12-15 10:49:13下载
- 积分：1
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simple-keybord
简易的电子琴，实现小字组、小字一组以及小字二组的乐音，可读取txt文档乐谱以及其他读写功能。(Simple keyboard, to achieve small print group, and a group of small print small print tone two groups can be read txt documents to read and write music, and other functions.)
- 2014-02-17 19:39:14下载
- 积分：1
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wendukongzhidianlu
最简单的温控系统，基于51单片机和DS18B20里面包含程序和仿真电路(temperature control)
- 2013-09-02 16:56:57下载
- 积分：1
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temp
ds18b20+1602 温度传感器原创代码，1602显示(Temperature sensor original code, using 1602 display .)
- 2015-03-08 17:14:02下载
- 积分：1
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Nochange
本代码为本人用8PS538 8脚单片机写的7彩渐变程序，渐变过程很缓和，渐变时间为3秒，有不懂QQ：1063754468(I used this code for 8PS538 8-pin single-chip color gradient 7 written procedures, a gradual process is very relaxed, and gradually the time was 3 seconds, there do not QQ: 1063754468)
- 2009-04-11 20:51:09下载
- 积分：1
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stc12c5404ad
p1.5脚控制灯。
当灯点亮是，把域值增大。
光传感器通过AD转换。
使用STC12C5404AD调试通过。(P1.5 pin control lights. When the lights lit is to increase the domain value. Optical sensor through the AD conversion. Debugging through the use of STC12C5404AD.)
- 2008-05-20 22:28:06下载
- 积分：1
