ST Manuals

AN2927 application note introduces capacitive touch sensing control technology and introduces ST's touch sensing software library, which can achieve low-cost touch detection function.

This application note describes the ADPCM audio firmware codec, and provides a demonstration firmware showing how to play ADPCM files using the high-density STM32F103xx I2S feature with an external DAC.

This application note presents the similarities and common features of the STM8S and STM32 product lines, with a view of helping migration from one family to the other.

The solar-LED streetlight controller described in this application note is designed to achieve an 85 W solar energy battery charger and a 25 W LED lamp driver. During the daytime, the controller preserves the electricity energy gathered by the solar module (PV module), then stores it in the battery. In the evening, the controller uses the battery energy to power the LED streetlight. When the battery runs out of power after several rainy days, the controller enables the external offline power supply (not included in this system) instead of the battery to power the LED streetlight until the system battery is fully charged again. Due to the clean nature of solar energy, and the highly efficient energy conversion of the PV module and very long operating life of the LED lamp, the solar-LED streetlight controller, compared to conventional streetlights, can save electricity remarkably, thus abating greenhouse gas (e.g. CO2) emission.

This document introduces how to upgrade the applications based on STM32F10xxx Firmware Library V2.0.3 (FWLib) to STM32F10xxx Standard Peripheral Library V3.0.0.

This application note provides a guide to the selection of the right sampling capacitor (CS) for applications based on STM8T141 and touch sensing library-based capacitive sensors.

This application note describes how to implement a driven shield on STM8T and STM8TS capacitive sensors. Driven shields can be used to reduce the influence of metal objects, ground planes or nearby traces, thereby increasing the detection range of capacitive sensors.

This document presents the principles of capacitive sensing and charge transfer used in STMicroelectronics STM8T and STM8TS capacitive sensors. All devices can be configured in touch or proximity sensing.

This document describes how to build a simple ADC using the STM8L101xx comparator.

Presents a precise calculation procedure to correctly set the necessary parameters when using a 3.3 V power supply.

This application note describes the implementation of the internal RTC (real-time clock) of the 32-bit, ARM Cortex-M3-based medium-density STM32F10xxx microcontroller. It provides a set of continuously running counters, which can be used to implement a clock/calendar function using suitable software. The RTC and backup registers are supplied through a switch that draws power from either the VDD supply or the backup battery. Thus, the RTC runs even when the main supply is switched off. This application note provides an example of how to implement the clock/calendar functionality using the medium-density STM32F10xxx microcontroller in low-power and standard applications. The firmware example also performs leap year counting and tamper time stamping. It provides a low-power mode demonstration and a basic RTC calibration routine to compensate for crystal and temperature variations. The STM3210B-EVAL board supports the firmware example described in this application note without any modification to its hardware.

This application note describes how to take advantage of the 16 MHz internal RC oscillator trimming feature on the STM8S and STM8A microcontroller to improve the frequency accuracy of the system compensating voltage and temperature frequency drift. The calibration technique, using the mains frequency as a timebase, is presented with an example of both hardware and software solutions. The example source code can be downloaded from the www.st.com. To benefit fully from the information in this application note, the user should be familiar with the STM8S and STM8A microcontroller architecture and with the basics of C language. For further information on the STM8S and STM8A family features, pinout, electrical characteristics, mechanical data and ordering information, please refer to the STM8S and STM8A datasheets. This document and its associated firmware, are written to accompany the STM8S and STM8A firmware library. Please contact STMicroelectronics for information on the STM8S and STM8A firmware library.

This application note provides I2C firmware optimized examples based on polling, interrupts and DMA, covering the four I2C communication modes available in the STM32F10xxx, that is, slave transmitter, slave receiver, master transmitter and master receiver.

This application note describes how to achieve optimum ADC accuracy on the STM32F10xxx. It first introduces various factors related to ADC design, such as external hardware design parameters and different types of ADC error sources. Then, some design recommendations are given, and how to reduce errors in hardware is proposed.

This application note is intended for system designers who require a hardware implementation overview of the low-power modes of the STM8S and STM8A product families. It shows how to use the STM8S and STM8A devices in these modes, describes how to take power consumption and wakeup time measurements, and gives results for such measurements.