STM8 MCUs

Posted on May 11, 2011 at 22:21What is 'safe' sink/source current for I/O pins for STM8S105/103

Posted on June 14, 2011 at 17:20Here's a question for the STVD & Cosmic gurus!  Since bit instructions in the STM8 do not utilize the zero page addressing I wanted to move the ''.bit'' section out of the ''Zero Page'' and into ''Ram'' so I'd have more room down there.  In STVD, I cannot make any change to the ''.bit'' section.  Is there a way to allow changes?  As a side note, I'd sure like to be able to modify the default segment/section mapping. jdf #cosmic-link-linking-stvd

Posted on June 12, 2011 at 19:42Hi all,does it exist libraries and a toolkit for STM8S able to connect through Bluetooth smart phones android based to STM8S? Is there any plan to devolop it?brazov2

Posted on April 27, 2011 at 15:42Hello All: In my company we are working with STM8S-Discovery and a Texas Instruments ADC ADS1231. We are trying to communicate via SPI but so far we have not been successful. Does anyone have experience with external ADC and discovery?We can change the ADC. Some example? Thank you very much in advance.

Posted on June 10, 2011 at 14:50Hey! I'm trying to make sensorless BLDC control unit on STM8L15xxx MCU. High-side switches of drive circuit are opened by logical ''1'', and low-side - by logical ''0''. So I need to perform six-step trapezoidal commutation using Timer1. The problem arises at transition between phase where top or bottom output of channel are active and phase where both top and bottom outputs of same channel must be inactive. I'm using the algorithm shown below. But i have some problems in the moment of transition between active and inactive phases. It seems like the top output makes an impulse when it already have to be inactive. Could You advise something for me? (this code is performed within of interception) // Disable All PWM Channels    TIM1->CCER1 &= (uint8_t)(~(TIM1_CCER1_CC1NE|TIM1_CCER1_CC2NE|TIM1_CCER1_CC1E|TIM1_CCER1_CC2E));

Posted on June 06, 2011 at 21:05Good day! I'm trying to assign register value to a variable in COSMIC C. I've tried the obvious way first, but it doesn't work: uint8_t test = 0; ... test = CLK->SWCR; // define from stm8s.h and uint8_t test = 0; ... test = CLK_SWCR; // define from ''C:\Program Files\COSMIC\CXSTM8_32K\Hstm8\iostm8s.h'' When I run my program in Debug mode and create a watch for 'test' variable it is always zero. What can be wrong? Thanks in advance!

Posted on June 03, 2011 at 18:00Hello, I have an existing platform that I've recently built on PIC18. Soon I'm starting a new project that is very price sensitive. Currently the existing platform occupies too much code memory, avoiding me to take a smaller PIC18 from among the same family. I thought if I move to STM8L, I might have this ability, since this MCU has CISC architecture vs RISC of PIC18. So, I would like to ask the people, who did some kind of code density benchmark between these 2 MCUs, to share their experiences. Thank you in advance, E.L.

Posted on May 21, 2011 at 15:40Hi all, I've set PE0 -> PE3 as inputs with internal pull-up enabled. Without connecting anything to these pins, I read the input register as 0x09, indicating that the pull-up is only operational on pins PE0 and PE3. Has anyone noticed similar behavior? Thanks and regards Nick

Posted on April 19, 2011 at 21:39Hello, I want to use the beep function with my STM8L Discovery. After writing the program to STM8L, I connect the a piezo speaker between PA0 and GND. The program is as following: // Initialize     BEEP_LSICalibrationConfig(16000000);     BEEP_Init(BEEP_Frequency_1KHz); //Beep     BEEP_Cmd(ENABLE);     delay_ms(200);     BEEP_Cmd(DISABLE); But it doesn't work. Do I need something another command on Initialization process ? I know the PA0 is connected to the SWIM. Is it affect something bad for the beeper function?

Posted on January 05, 2011 at 18:19Please HELP. STM8L+DAC

Posted on May 31, 2011 at 11:26Hi all, I'm trying to configure PortB as a Digital Input and afert reading the IDR register it seems to be reading the analog value of the PB0 pin. I've tried to configure PortB as PullUP no interrupt or Floating, but same result. I`ve configured the PortB as Output and it works fine. Is not possible to configure the PortB as digial input????. Regards. Oscar #portb

Posted on March 29, 2011 at 19:03Hi All, I have taken some of the sample code that comes with the stm8l-discovery eval board to try and talk to hyperterm on from stm8.  when i try to send anything all I see is garbage on the hyperterm screen...  I have verified both side have the same settings, 115200, no polarity, 1 stop bit, 8 bit word length - butstill it does not work. Can I get some help to get this working?  My sample code snippet is as follows - can someone explain what I am doing wrong? &sharpdefine DBG_COM1                   USART1 &sharpdefine DBG_COM1_GPIO              GPIOC &sharpdefine DBG_COM1_CLK               CLK_Peripheral_USART1

Posted on May 17, 2011 at 15:15Hello;I'm trying to communicate to an external flash memory (M25PE80) using SPI. I´m using the STM8SPI librarie but I´m not having success to write/read from memory. My doubt is about the configuration of pins. Are there any Option Byte that I must set to use the SPI alternate function? Does I need to use the GPIO_Init to configure the ports used for SPI (MISO, MOSI, CLK)? For the Chip Select pin, I´m using the PortG0 as GPIO_MODE_OUT_PP_LOW_FAST.These are the code I´m using to init the SPI (Funtions from stm8s_spi.c):SPI_DeInit();SPI_Init(SPI_FIRSTBIT_MSB, SPI_BAUDRATEPRESCALER_64,SPI_MODE_MASTER,SPI_CLOCKPOLARITY_HIGH, SPI_CLOCKPHASE_2EDGE, SPI_DATADIRECTION_2LINES_FULLDUPLEX,SPI_NSS_SOFT, 0x07);SPI_Cmd(ENABLE);Regards

Posted on May 06, 2011 at 13:18How to store large constant arrays in flash not in RAM

Posted on April 29, 2011 at 07:56STM8 core bug

Posted on April 26, 2011 at 10:13STM8L151K4 adc input impedance

Posted on April 21, 2011 at 08:33No workaround for STM8 assembler bug

Posted on April 10, 2011 at 09:59STM8L HSE Clock issues

Posted on April 04, 2011 at 05:40STVD and Data EEPROM unlock

Posted on March 30, 2011 at 15:48COSMIC and OPTION_BYTE

Posted on March 26, 2011 at 14:25 STM8 FT(Five Volt Tollerant Pins) Problem

Posted on March 24, 2011 at 12:00I2C protocol STOP condition not detected in slave-transmission mode

Posted on March 22, 2011 at 15:18TIM1 Input Capture not accurate at low frequencies?

Posted on March 22, 2011 at 08:21Maximum Cable length for I2C protocol in STM8S #i2c

Posted on March 17, 2011 at 13:1916bit SPI on STM8