About afr_e2

afr_e2 · 2024-10-07

Hello everyone, in a project we are using the ST25R3916 chip to read RFID cards. To do this we are using the sources of the STSW-ST25R-LIB library. If the ST25R3916 sets its IRQ output, the routine st25r3916isr() is called. In this ISR the interrupt ...

afr_e2 · 2023-08-04

I've changed from LIS2DH to IIS2DH, without changing the drivers sources. According to the datasheet, there should be no problem doing this.In the application the accelerator is used to detect each motion of the device. If the device keeps un-motione...

afr_e2 · 2024-10-09

Hi again,thank you for your analysis. At first I just have modified the "WaitFor..." function. When modifying the GetInterrupt function also, everything works fine!Here my mods:uint32_t st25r3916GetInterrupt( uint32_t mask ) { if (platformGpioIsH...

afr_e2 · 2024-10-08

Hi Ulysses,this ist my setup:The test is to read cyclic the UID of the chip card. I have made 2 tests:st25r3916Isr() is called in the EXTI context (good case)st25r3916Isr() is called in the mainloop context (called in st25r3916WaitForInterruptsTimed(...

afr_e2 · 2024-10-08

In my current implementation I registered the st25r3916Isr() to the EXTI9_5_IRQHandler(). If the rising edge is detected, the st25r3916Isr() is called immediatelly - in EXTI9_5_IRQHandler context. Since the function reads the IRQ registers via SPI, t...

afr_e2 · 2024-10-07

Hi TDK,thank you for your reply. I already tried to do so, but then I'm not able to read the card anymore. Maybe it takes too much time between irq rising and handling?!? So, is there any other possibility to synchronize the SPI access with the main ...

afr_e2 · 2024-10-07

Hi Ulysses,thank you for the reply. I checked both implementations and have seen, that both are using a mulithreading OS and spend a seperate thread to handle the ISR. In that case you can use a semaphore or mutex.In my project I'm not using a RTOS, ...

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STSW-ST25R-LIB using SPI while in IRQ context

IIS2DH - multiple interrupts

Re: STSW-ST25R-LIB using SPI while in IRQ context

Re: STSW-ST25R-LIB using SPI while in IRQ context

Re: STSW-ST25R-LIB using SPI while in IRQ context

Re: STSW-ST25R-LIB using SPI while in IRQ context

Re: STSW-ST25R-LIB using SPI while in IRQ context