About AA1

AA1 · 2024-04-26

1. According to datasheet, STM32U0 family have an IRTIM (Infrared interface). But this section is missing in RM0503. Also in SYSCFG_CFGR1 there is missing IR_MOD and IR_POL bits.2. In RTC section Figure 297 it is missing RTC_OUT2 and RTC_REFIN pins. ...

AA1 · 2022-07-04

Cortex-M0 programming manual have several instructions like this:You can use the LSR ...When the instruction is LSRS, the carry flag is updated ...But I believe that on Cortex-M0, there is no optional 'S' appended to instructions to update flags. Ins...

AA1 · 2022-02-14

Hi,I need clarification of errata, "Interrupt service routine (ISR) executed with priority of main process".I don't understand in which cases this limitation can occur.I don't understand why the workaround used for STM8S (put a SIM instruction at the...

AA1 · 2021-10-07

Hi,Reference: AN5179 - RS232 communications with a terminal using the STM8 Nucleo-64 boardshttps://www.st.com/resource/en/application_note/dm00513075-rs232-communications-with-a-terminal-using-the-stm8-nucleo64-boards-stmicroelectronics.pdfAN5179 pag...

AA1 · 2024-07-18

STM uses an I2C address left-shifted by 1 bit and possibly ESP32 not. On ESP32 try with 'slaveAddr = (0x30 >> 1)'. Also you don't have an I2C interrupt handler and I2C_TwoBoards example have.printf("%d \n\r", data); should be:printf("%x \n\r", data);...

AA1 · 2024-07-16

STM8L15x/16x/05x/AL3Lx/AL31x standard peripheral library.

AA1 · 2024-07-16

RM0016 page 142: Do not use the LDW instruction to read the 16-bit counter. It reads the LS byte first and returns an incorrect result.

AA1 · 2024-07-11

As this MCU doesn't have reset pin, external reset is only possible by Power-On Reset.If SWIM pin is not used as GPIO, it should be possible to connect by SWIM even without reset. Read RM0016 pages 57 and 58, and datasheet page 12.

AA1 · 2024-07-01

Don't insert code as if it was text. When you insert code, you should click in </> icon in the toolbar.SPI3_SCK and SPI3_MOSI output type should be push-pull. Where is GPIO configuration?

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Missing section IRTIM in STM32U0 RM and more.

Possible error in Cortex-M0 programming manual.

Need clarification of errata, "Interrupt service routine (ISR) executed with priority of main process".

RS232 communication with a terminal using STM8L-DISCOVERY.

Re: STM8S003F3 I2C Slave Not Working - Troubleshooting Assistance Needed

Re: STM8S/A Standard peripheral library usable for STM8L?

Re: TIM1 registers read errata

Re: STM8S001J3: Unable to communicate with the device

Re: Problem with SPI Communication - Nucleo U575ZI-Q/STEVAL-MKI168V1