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ashishgawade
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ashishgawade
Asked: December 8, 2022In:
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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 ...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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bootflashfx3gpio46spiuart
  1. vikas Nagpal

    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

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nidhi singh
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nidhi singh
Asked: November 1, 2022In:
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Hii,  I’m designing a dev board based on ESP32- C3 (ESP32- C3FN4) and I’m not sure if I’m good with connections for download boot. Is it enough to put tactile switched on GPIO2 and GPIO8 towards VCC and pull down ...Read more

Hii,  I’m designing a dev board based on ESP32- C3 (ESP32- C3FN4) and I’m not sure if I’m good with connections for download boot.
Is it enough to put tactile switched on GPIO2 and GPIO8 towards VCC and pull down on GPIO9?

Also, should I include a connector in case the device needs to be flashed?

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bootdeviceesp32ESP32-C3gpio
  1. Alex thomas

    Hello, You need to start your esp32 with the Low position on the Boot pin to begin the bootloader. In normal mode, u can hold a HIGH position on this pin by pullup him up with 10k, for example. Generally, you can use 2 buttons for switching modes, 1- to connect the boot pin to GND, 2- to pull the RSRead more

    Hello, You need to start your esp32 with the Low position on the Boot pin to begin the bootloader. In normal mode, u can hold a HIGH position on this pin by pullup him up with 10k, for example. Generally, you can use 2 buttons for switching modes, 1- to connect the boot pin to GND, 2- to pull the RST( EN) pin to GND- for resuming esp32 (you need to pull up it too). Also, you can use special schemes which will do it automatically.

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