Sign Up to our social questions and Answers Engine to ask questions, answer people's questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people's questions & connect with other people.
Volt.Tech
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
A UART (Universal Asynchronous Receiver Transmitter) is a piece of logic that sends and receives data on a serial port.
Hi, I got a question that seems not easily answered in the HW documentation. ESP32-U4WDH which has an internal flash, does VDD_SDIO power needs to be connected at all? If so, shall it be connected to 100nF or VCC which is ...Read more
Hi,
I got a question that seems not easily answered in the HW documentation.
ESP32-U4WDH which has an internal flash, does VDD_SDIO power needs to be connected at all?
If so, shall it be connected to 100nF or VCC which is 3v3?
Thanks for your inputs
Read lessWe have developed 2kW PFC Board with ICE3PCS01G. When I did first power on with 12.15VDC, Vref not coming from IC. After that I replace the new chip, then it worked fine. But again after changing the nearest components during ...Read more
We have developed 2kW PFC Board with ICE3PCS01G.
When I did first power on with 12.15VDC, Vref not coming from IC. After that I replace the new chip, then it worked fine. But again after changing the nearest components during troubleshooting, the same problem came (vref gone), But ICOMP=5V is coming. 4 nos of IC got damaged and the same problem coming.
please suggest a solution.
Read less
Thanks for your Question. For the IC, the turn-on voltage is between 11.5~12.9V, turn of is between 10.5~11.9V. So, for 12.15V, if the Vcc is from 12.9V down to it, the IC will run. If VCC is from 10V up to 12.15V, the IC is off and can't work.
Thanks for your Question.
For the IC, the turn-on voltage is between 11.5~12.9V, turn of is between 10.5~11.9V.
So, for 12.15V, if the Vcc is from 12.9V down to it, the IC will run. If VCC is from 10V up to 12.15V, the IC is off and can’t work.
See lessHello, I need to use both UART and SPI interface, FX3’s SPI interface and UART interface are shared, now my SPI is connected to FLASH, I need to power on through SPI FLASH, so I can not use its UART ...Read more
Hello, I need to use both UART and SPI interface, FX3’s SPI interface and UART interface are shared, now my SPI is connected to FLASH, I need to power on through SPI FLASH, so I can not use its UART function, but FX3 has” 16- bit data bus UART SPI I2S” mode. In this mode, UART is mapped to GPIO46-49. Can I use the following settings to enable me to use both UART and SPI FLASH BOOT?
io_cfg.isDQ32Bit = CyFalse;
io_cfg.s0Mode = CY_U3P_SPORT_INACTIVE;
io_cfg.s1Mode = CY_U3P_SPORT_INACTIVE;
io_cfg.useUart = CyTrue;
io_cfg.useI2C = CyFalse;
io_cfg.useI2S = CyFalse;
io_cfg.useSpi = CyTure;
io_cfg.lppMode = CY_U3P_IO_MATRIX_LPP_DEFAULT;
/* No GPIOs are enabled. */
io_cfg.gpioSimpleEn[0] = 0;
io_cfg.gpioSimpleEn[1] = 0x08000000;
io_cfg.gpioComplexEn[0] = 0;
io_cfg.gpioComplexEn[1] = 0;
And, can I still use the virtual COM port function of the UART in this mode?
Read lessHi, You can use the" 16- bit Data Bus UART SPI I2S" configuration to use both UART and SPI. Please refer to the available GPIOs for that mode in Table 7 of the FX3 datasheet. As mentioned in the table, you must choose the proper GPIO if you want to use some GPIOs. If you want to use I2S GPIOs you haRead more
Hi,
You can use the” 16- bit Data Bus UART SPI I2S” configuration to use both UART and SPI. Please refer to the available GPIOs for that mode in Table 7 of the FX3 datasheet. As mentioned in the table, you must choose the proper GPIO if you want to use some GPIOs. If you want to use I2S GPIOs you have to override using CyU3PDeviceGpioOverride.
Yes, the virtual COM port will work if you use the below configuration.
Thanks
See lessHello, I am working on the USB. I added the” USB PCDC” stack. But there’s an error” Requires USB clock to be 48 MHz”. How can I fix it?Please see attached screenshot. Thanks.
Hello,
I am working on the USB. I added the” USB PCDC” stack. But there’s an error” Requires USB clock to be 48 MHz”. How can I fix it?
Please see attached screenshot.
Thanks.
Hello, You need to go to the" Clocks" tab of the FSP configurator and enable the UCLK clock. also, adjust your PLL Mul and UCLK Div to reach the UCLK frequency of 48 MHz. Kind regards,
Hello,
You need to go to the” Clocks” tab of the FSP configurator and enable the UCLK clock. also, adjust your PLL Mul and UCLK Div to reach the UCLK frequency of 48 MHz.
Kind regards,
Hi! I’m applying the LED Control (LEDC) PWM to control the servo motor, it worked well. And now I need to control further than 8, I’ve checked the ESP32 datasheet, and there have 16 channels can use 8 in High – ...Read more
Hi!
I’m applying the LED Control (LEDC) PWM to control the servo motor, it worked well.
And now I need to control further than 8, I’ve checked the ESP32 datasheet, and there have 16 channels can use 8 in High – speed mode, and 8 in Low – speed mode.
But the ledc library does not support low- speed mode right now, is there any way to use led pwn in low- speed mode?
Like, write the register directly?
thanks!
Read lessNot sure if the driver does not support all 16 channels. they may just not be supporting the low- speed option of the low- speed channels. But anyway, if you want to poke at the registers yourself, the LED PWM controller is documented in the TRM. Do not forget to actually turn the peripheral on, andRead more
Not sure if the driver does not support all 16 channels. they may just not be supporting the low- speed option of the low- speed channels. But anyway, if you want to poke at the registers yourself, the LED PWM controller is documented in the TRM. Do not forget to actually turn the peripheral on, and you should get it going enough quickly.
See less
Hello, I’m using RA2L1 and E2 Studio. I want to use UART without interrupt. How can i read and transmit datas?
Hello,
I’m using RA2L1 and E2 Studio. I want to use UART without interrupt. How can i read and transmit datas?
Read less
It's possible, but you won't be suitable to use the Read and Write API as handed. You'll have to produce your own which will poll the flags of the SCI SSR( Serial Communications Interface Serial Status Register) You would have to pend on the RDRF for data reception, and TDRE( & potentially TEND)Read more
It’s possible, but you won’t be suitable to use the Read and Write API as handed. You’ll have to produce your own which will poll the flags of the SCI SSR( Serial Communications Interface Serial Status Register)
You would have to pend on the RDRF for data reception, and TDRE( & potentially TEND) for data transmission.
See lessJust got the EK-RA4M2. Downloaded example code from here (EK-RA4M2 – Evaluation Kit for RA4M2 MCU Group | Renesas). Connected 1) RXD MISO P410 ——-> TXD Pin of USB-UART 2) TXD MOSI P411 ——-> RXD Pin of USB-UART 3) Common GND as ...Read more
Just got the EK-RA4M2. Downloaded example code from here (EK-RA4M2 – Evaluation Kit for RA4M2 MCU Group | Renesas). Connected
1) RXD MISO P410 ——-> TXD Pin of USB-UART
2) TXD MOSI P411 ——-> RXD Pin of USB-UART
3) Common GND
as readme.txt.
However, there is no serial activity. any suggestions?
Read lessThe pins P410, P411 are connected to the SCI0, and pins P601, P602 are connected to the SCI9. Have you changed the channel number in the UART stack like this? Also make sure that the Rx/Tx pins have both CMOS output type:
The pins P410, P411 are connected to the SCI0, and pins P601, P602 are connected to the SCI9. Have you changed the channel number in the UART stack like this?
Also make sure that the Rx/Tx pins have both CMOS output type:
I am testing “esp_sleep_enable_uart_wakeup” function. I have connected to UART0 (GPIO3 U0RX, GPIO1 U0TX) an external LTE module and I would like to wake up ESP32 when it is in light sleep but the external module send a particular string on ...Read more
I am testing “esp_sleep_enable_uart_wakeup” function.
I have connected to UART0 (GPIO3 U0RX, GPIO1 U0TX) an external LTE module and I would like to wake up ESP32 when it is in light sleep but the external module send a particular string on the UART0.
I have done a very simple test. It seems to work, but as soon as I change these configuration for CONSOLE debug output from the default to the below ones:
CONFIG_CONSOLE_UART_DEFAULT= CONFIG_CONSOLE_UART_CUSTOM=y CONFIG_CONSOLE_UART_NONE= CONFIG_CONSOLE_UART_CUSTOM_NUM_0= CONFIG_CONSOLE_UART_CUSTOM_NUM_1=y CONFIG_CONSOLE_UART_NUM=1 CONFIG_CONSOLE_UART_TX_GPIO=25 CONFIG_CONSOLE_UART_RX_GPIO=27 CONFIG_CONSOLE_UART_BAUDRATE=115200
It doesn’t work. I would like to use UART1 to send out the debugs because UART0 is occupied to talk with the external module: but the changes in the SDK config (only the one reported above) seems to be the cause of the issue.
How to solve the issue?
Read less
You have to do this PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD_U0RXD); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD_U0TXD);
You have to do this
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD_U0RXD);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD_U0TXD);How to leverage the UART function of digital IC XDPL series?
How to leverage the UART function of digital IC XDPL series?
Read lessHow do we change the UART BR in runtime?
How do we change the UART BR in runtime?
Read lessThere are basically two way to change the UART baud rate at run-time. It depends how you allocated the UART. If you allocated by PDL-method (ie. In the PSoC Creator TopDesign or Modustoolbox Device Configurator [design.modus]) then use the PDL SysClk API calls: Configure Baud Rate To get the UARTRead more
There are basically two way to change the UART baud rate at run-time. It depends how you allocated the UART.
If you allocated by PDL-method (ie. In the PSoC Creator TopDesign or Modustoolbox Device Configurator [design.modus]) then use the PDL SysClk API calls:
To get the UART to operate with the desired baud rate, the clk_scb frequency and the oversample must be configured. Use the SysClk (System Clock) driver API to configure clk_scb frequency. Set the oversample parameter in configuration structure to define the number of the SCB clocks within one UART bit-time.
* For clk_peri = 50 MHz, select divider value 36 and get SCB clock = (50 MHz / 36) = 1,389 MHz.
* Select Oversample = 12. These setting results UART data rate = 1,389 MHz / 12 = 115750 bps.
*/
Cy_SysClk_PeriphSetDivider (UART_CLK_DIV_TYPE, UART_CLK_DIV_NUMBER, 35UL);
Cy_SysClk_PeriphEnableDivider(UART_CLK_DIV_TYPE, UART_CLK_DIV_NUMBER);
Refer to the technical reference manual (TRM) section UART sub-section Clocking and Oversampling to get information about how to configure the UART to run with desired baud rate.
If you allocated the UART by the HAL-method use:
cyhal_uart_set_baud() link: Hardware Abstraction Layer (HAL)
See less
Hello, To run internal flash in ESP32-U4WDH You'd need to connect it to a 100nF capacitor. Thank & Regards
Hello,
To run internal flash in ESP32–U4WDH You’d need to connect it to a 100nF capacitor.
Thank & Regards
See less