ST公司的STEVAL-CCM001V2图像解决方案是采用STM32F103xC,STM32F103xD或STM32F103xE 32位MCU,采用ARM
Cortex
-M3 RISC内核,工作频率72MHz,具有256-512KB闪存,USB.CAN以及格1个定时器,3个ADC和13个通信接口,工作电压2.0到3.6V,工作温度–40到+105℃,主要用在马达驱动和应用控制,医疗和手持设备,PC外设和GPS平台,工业应用,PLCV,变频器,打印机和扫描仪以及告警系统,视频互连和HVAC.本文介绍了STM32F103xC,STM32F103xD和STM32F103xE主要特性,方框图,时钟树和电源方案,以及STEVAL-CCM001V2图像演示板主要特性和电路图.
The STM32F103xC, STM32F103xD and STM32F103xE performance line family incorporates the high-performance ARM Cortex-M3 32-bit RISC core operating at a 72 MHz frequency, high-speed embedded memories (Flash memory up to 512 Kbytes and SRAM up to 64 Kbytes), and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer three 12-bit ADCs, four general-purpose 16-bit timers plus two PWM timers, as well as standard and advanced communication interfaces: up to two I2Cs, three SPIs, two I2Ss, one SDIO, five USARTs, an USB and a CAN.
The STM32F103xx high-density performance line family operates in the –40 to +105 ℃temperature range, from a 2.0 to 3.6 V power supply. A comprehensive set of power-saving mode allows the design of low-power applications.
The STM32F103xx high-density performance line family offers devices in six different package types: from 64 pins to 144 pins. Depending on the device chosen, different sets of peripherals are included, the description below gives an overview of the complete range of peripherals proposed in this family.
These features make the STM32F103xx high-density performance line microcontroller family suitable for a wide range of applications:
● Motor drive and application control
● Medical and handheld equipment
● PC peripherals gaming and GPS platforms
● Industrial applications, PLC, inverters, printers, and scanners
● Alarm systems, video intercom, and HVAC
STM32F103xx主要特性:
■ Core: ARM 32-bit Cortex-M3 CPU
– 72 MHz maximum frequency, 1.25 DMIPS/MHz (Dhrystone 2.1) performance at 0 wait state memory access
– Single-cycle multiplication and hardware division
■ Memories
– 256 to 512 Kbytes of Flash memory
– up to 64 Kbytes of SRAM
– Flexible static memory controller with 4 Chip Select. Supports Compact Flash,SRAM, PSRAM, NOR and NAND memories
– LCD parallel interface, 8080/6800 modes
■ Clock, reset and supply management
– 2.0 to 3.6 V application supply and I/Os
– POR, PDR, and programmable voltage detector (PVD)
– 4-to-16 MHz crystal oscillator
– Internal 8 MHz factory-trimmed RC
– Internal 40 kHz RC with calibration
– 32 kHz oscillator for RTC with calibration
■ Low power
– Sleep, Stop and Standby modes
– VBAT supply for RTC and backup registers
■ 3 × 12-bit, 1 μs A/D converters (up to 21 channels)
– Conversion range: 0 to 3.6 V
– Triple-sample and hold capability
– Temperature sensor
■ 2 × 12-bit D/A converters
■ DMA: 12-channel DMA controller
– Supported peripherals: timers, ADCs, DAC, SDIO, I2Ss, SPIs, I2Cs and USARTs
■ Debug mode
– Serial wire debug (SWD) & JTAG interfaces
– Cortex-M3 Embedded Trace Macrocell
■ Up to 112 fast I/O ports
– 51/80/112 I/Os, all mappable on 16 external interrupt vectors and almost all 5 V-tolerant
■ Up to 11 timers
– Up to four 16-bit timers, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
– 2 × 16-bit motor control PWM timers with dead-time generation and emergency stop
– 2 × watchdog timers (Independent and Window)
– SysTick timer: a 24-bit downcounter
– 2 × 16-bit basic timers to drive the DAC
■ Up to 13 communication interfaces
– Up to 2 × I2C interfaces (SMBus/PMBus)
– Up to 5 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control)
– Up to 3 SPIs (18 Mbit/s), 2 with I2S interface multiplexed
– CAN interface (2.0B Active)
– USB 2.0 full speed interface
– SDIO interface
■ CRC calculation unit, 96-bit unique ID
■ ECOPACK packages
图1.STM32F103xx系列方框图
图2.STM32F103xx系列时钟树框图
图3.STM32F103xx系列电源方框图
STEVAL-CCM001V2图像演示板
Graphic panel demonstration board based on the STM32
The STM32-based STEVAL-CCM001V2 graphic panel demonstration board displays images oneby- one in a slideshow fashion. The heart of this board is the STM32 microcontroller, which is capable of reading a memory card containing photographs, and display them on a TFT screen. The memory used to store the images is a microSD card. A 3-axis MEMS accelerometer is used for picture orientation.With the growing popularity of digital cameras and cellular phones with high-pixel photo capability, it is becoming more common for people to store digital photos in storage media rather than producing prints. Digital photo frames are an ideal solution to preview digital images. Bundling image display solutions with the STM32 shows the capability of this microcontroller in the world of multimedia. Additional features of the board include display of room temperature, date and time, a touchscreen-based keypad as user interface, USB mass storage, ZigBee and a rechargeable battery system.
The application can be used either as a standalone solution, or combined with other
applications such as POS, card readers, security panels, USB speakers or high-end remote controls.
STEVAL-CCM001V2图像演示板主要特性:
■ Microcontroller: STM32-HD (64 KB RAM)
■ 320 x 240 resolution parallel TFT screen using FSMC peripheral for faster display
■ Bluetooth module footprint
■ Touchscreen for user interface
■ ZigBee for picture transfer
■ STM32-based RTC available to display date/time and calendar
■ MEMS device to rotate the image based on TFT position
■ MicroSD card interfaced through SDIO
■ USB Mini-B connector
■ PC connectivity
■ User-programmable time interval for photo display
■ Senses temperature and displays data on TFT
■ On-board power supply for DPF
■ Rechargeable battery circuit available
■ On-board JTAG connector for firmware upgrade and modifications
■ Additional ESD protection device for USB and SD card
■ RoHS compliant
图4.STEVAL-CCM001V2图像演示板外形图
图5.STEVAL-CCM001V2图像演示板电路图:MCU部分
图6.STEVAL-CCM001V2图像演示板电路图:连接器部分(TFT, microSD, JTAG, 温度传感器, ZigBee, 蓝牙,触摸板连接器)
图7.STEVAL-CCM001V2图像演示板电路图:电源,MEMS和USB
图8.STEVAL-CCM001V2图像演示板电路图:S-触摸键部分
来源：中电网