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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.
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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?
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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 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.
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Hello, I am experimenting with UART, I’m transferring data every 1 second in my application. When I connect the Rx and Tx pins there’s no trouble.But when I cut the pin attachments. The data I send comes back to me ...Read more
Hello,
I am experimenting with UART, I’m transferring data every 1 second in my application. When I connect the Rx and Tx pins there’s no trouble.
But when I cut the pin attachments. The data I send comes back to me in the form of an interruption. How can I fix this situation? What’s the reason for this situation?
Thanks
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Hi, Thanks for reaching out to Volt.Tech Engineering Community. The UART- related interrupts can be seen below and call the defined callback function if it's defined. If you do not want a break in you can disable it by configuring SCR( Serial Control Register) properly. Else, you can close UART withRead more
Hi,
Thanks for reaching out to Volt.Tech Engineering Community.
The UART- related interrupts can be seen below and call the defined callback function if it’s defined.
If you do not want a break in you can disable it by configuring SCR( Serial Control Register) properly. Else, you can close UART withR_SCI_UART_Close() when no physical connection is established between the pins and open it again when there’s a connection.
Let us know if you solved your issue.
Regards,
See lessHello, 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 lessIt'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?
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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:
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?
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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);I want to configure RX0 and TX0 on pins P16 and P17 for Renesas R5F102AA, is it possible without changing the pin setting on PIOR register?
I want to configure RX0 and TX0 on pins P16 and P17 for Renesas R5F102AA, is it possible without changing the pin setting on PIOR register?
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Do you see the note on page 20 of the Hardware User's Manual? It says clearly that PIOR has to be used to change the function to TxD0/RxD0.
Do you see the note on page 20 of the Hardware User’s Manual?
It says clearly that PIOR has to be used to change the function to TxD0/RxD0.
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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