ChibiOS Free Embedded RTOS

Giovanni wrote:Hi,

See PMs, suggestions are welcome.

Giovanni

Thank you. Went to read the book.

Re all. How can I take a look on the book?

The final solution:

There is a problem. The macro STM32_RTC_HAS_SUBSECONDS is defined for RTCv2, but as I remember stm32f103 has to use RTCv1.

If I am right, any ideas to get milliseconds?

Update
Yes, I am right: link to post.

Hi.

I need to get an information about current time with milliseconds resolution. I use function rtcGetTimeTm() and see in docs that tm structure has only field for seconds, not millisecond. It makes me think that I can't get milliseconds. But suddenly I have know that my stm32f103 has an ability ...

Unfortunately, I can use only SPI2 at this moment. I have a GPIO expander on I2C2 and microSD on SPI2. I need to write a data from GPIO to microSD periodically. I'm ready to write some code for ChibiOS but need some guidance.

As I see in this code I2C2 uses DMA 4&5 channels.:

#define STM32_HAS_I2C2 TRUE
#define STM32_I2C2_RX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 5))
#define STM32_I2C2_RX_DMA_CHN 0x00000000
#define STM32_I2C2_TX_DMA_MSK (STM32_DMA_STREAM_ID_MSK(1, 4))
#define STM32_I2C2_TX_DMA_CHN 0x00000000

And here ...

wbober wrote:The issue we have is that when you switch off SPI and switch on I2C the later doesn't work properly. To deal with the problem we decided to modify the driver and use IRQs instead of DMA.

Can anyone explain what to do to use IRQs instead of DMA. It is not clear for me.

I have the same issue on STM32F103 with I2C2 & SPI2.

I have forgot to check the results of shellCreate:

if (th_shell == NULL) {
chprintf((BaseSequentialStream*) &SHELL_SD,
"cmd respawn: heap of %d bytes can not be allocated\n",
SHELL_WA_SIZE);
}

Then I reduce SHELL_WA_SIZE and it works now.