You signed in with another tab or window. Thanks for your response. D: 0:3 00 00 00 00 00 00 000000 (*2) I am using SC16is752 UART driver in i2c mode. serial port - Raspberry Pi + sc16is752 - Stack Overflow The changes haven't been regression tested, but it is currently working reliably for me on my breadboarded SC16IS752 interface. Y: 6:0 06 00 00 06 00 00 000000 However, I cannot read the uart for now and I suspect, I am missing the right configuration. sc16is752 SPI driver probe function is not called. Never see it called from, static bool sc16is7xx_port_irq(struct sc16is7xx_port *s, int portno), Had been spending a good amount of time trouble shooting this!!! I don't have SPI interface in my processor, i have only I2C interface which i connect this. Please share the 'SC16IS752' driver source code and explain how to integrate this driver with main. Please let us know the brief steps. How to vertical center a TikZ node within a text line? * SC16IS7xx tty serial driver - Copyright (C) 2014 GridPoint, * Author: Jon Ringle , * Based on max310x.c, by Alexander Shiyan , * TCR trigger levels are available from 0 to 60 characters with a granularity, * The programmer must program the TCR such that TCR[3:0] > TCR[7:4]. In my hardware the messages are polled via i2c., then what is the significance of the interrupt parent and interrupts in the dts? (I also changed clock freq because I'm using 1.843200MHz crystal in my hardware, not 14.xxxxMHz): I compiled dts file, I put it to /boot/overlays and I have added proper line in /boot/config.txt to use that overlay. documents. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. SPI1_HOST is used for communication with Flash memory. Raspbian use jessie version with kernel version 4.1.3+ I compiled the module sc16is7xx.ko with result ok and now I do not know how to use it. Below is the context to enable SPI function. * back to a non-shared falling-edge trigger. You do not have permission to remove this product association. In Linux device tree syntax, what happens when duplicate labels appear? Please mark this Forum post as answered via the Verify Answer button below if it helps answer your question. sc16is7xx_ist call back is setup, guessing probably the dts parsing for interrupt node is wrong. * Setup interrupt. General Discussion device-tree, kernel Ndziura July 24, 2022, 12:28pm #1 I am trying to configure an SC16IS752 device but my unfamiliarity with linux is getting in the way. New replies are no longer allowed. But Rx always comes via interrupt and havent seen it happening. But from PC to the device will not work.In short rx wont work at all. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Partner Marketplace. please share the working code for modifying this in to I2C based. 2 Texas Instruments has been making progress possible for decades. Quick reference to our 2 I'm trying to make SC16IS752 (SPI to UART converter) work in RS485 mode by using device tree overlay (without running C application at boot). Can I accept donations under CC BY-NC-SA 4.0? Make sure the interrupt bits register are properly enabled in the Interrupt Enable Register (IER). When you don't use SDSPI, both SPI2_HOST and SPI3_HOST will work. Section 7.3 of the datasheet explains how to configure the device: https://www.nxp.com/docs/en/data-sheet/SC16IS752_SC16IS762.pdf. sc16is752 maaxboard Compile kernel module (sc16is7xx.c) david.bozo over 2 years ago Hello! I work with the NXP chip SC16IS740 as a peripheral to an embedded linux system (mainline kernel v4.8). We first try to acquire the IRQ line as level IRQ. This topic was automatically closed 14 days after the last reply. Heres one example, change the spi1 section: I have modified the file, however when I try to compile it I get the error, #include NVIDIA R535 Linux Beta Brings New Vulkan Extensions, DMA-BUF - Phoronix (*3) To find a complete list of our partners that support this product, please see our To get it integrated with the kernel I modified the /drivers/serial/Makefile to include: I wanted it as a loadable module. To review, open the file in an editor that reveals hidden Unicode characters. RTS line now is always LOW (without flag it was HIGH - see image above): So this flag has been read by kernel/driver, but it RTS does nothing when I'm sending data. G: 1:2 0c 00 00 0c 00 00 000000 One thing comes to my mind: does the choice between the kernel config variables SERIAL_SC16IS7XX_I2C and SERIAL_SC16IS7XX_SPI match the interface the hardware uses? * This is similar to disabling the interrupt, but that doesn't work, * because the bulk of the interrupt processing is run as a workqueue, * Hardware flow control is enabled and thus the device ignores RTS, * value set in MCR register. lrwxrwxrwx 1 root root 0 Jul 22 00:22 spidev0.0 //devices/7000d400.spi/spi_master/spi0/spi0.0/spidev/spidev0.0 tegra210-p3448-0000-p3449-0000-a01-hdr40.dts (5.9 KB). How to divide is described in the data sheet. For adding the driver I added in the drivers/serial.kconfig. In this movie I see a strange cable for terminal connection, what kind of connection is this? infact the transmission is happening from kthread_init_work(&s->p[i].tx_work, sc16is7xx_tx_proc); The call to sc16is7xx_handle_tx is only happening from the sc16is7xx_tx_proc. engineering services. What do the characters on this CCTV lens mean? Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. pin 19 mosi 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows, Potential U&L impact from TOS change on Imgur, PSA: Stack Exchange Inc. have announced a network-wide policy for AI content, Linux cdc_acm device - unexpected characters sent to USB device, ttyO ports do not have the good port address on QEMU 1.4.0 running image for beagleboard-xm. I'm suspecting that the driver has no default configuration, and it has zeroes in both SER_RS485_RTS_ON_SEND and SER_RS485_RTS_AFTER_SEND flags. Hi @Ndziura feel free to re-enable that config: I had to disable it for us, as the breaks SERIAL_DEV_CTRL_TTYPORT, which breaks Bluetooth on wl18xx which breaks the Black Wireless, Green Wireless, Gateway etc. SC16IS752 driver linux Options 10-15-2020 06:52 PM 2,202 Views aneesnorthwales Contributor I I am using SC16is752 UART driver in i2c mode. Device tree binding documentation for RS485. * control is enabled to avoid spurious operation of the device. max speed: 500000 Hz (500 KHz), TX | 31 32 33 34 34 34 34 61 62 63 64 __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ | 1234444abcd SC16IS7XX_LCR_TXBREAK_BIT : val = SC16IS7XX_FCR_RXRESET_BIT | SC16IS7XX_FCR_TXRESET_BIT; val = SC16IS7XX_IER_RDI_BIT | SC16IS7XX_IER_CTSI_BIT |. I2C has speed 400 kHz. 11-06-2017 08:58 PM 1,601 Views fq1110 Contributor I Dear All, I use the LPC3250 + SC16IS752, the SPI interface to expand two serial ports,OSC 11059200,SPI speed 4M, but now I am having problems, when the peripheral sends a large amount of data, far beyond the FIFO 64 bytes, at this time, will receive the following error. linux/sc16is7xx.c at master torvalds/linux GitHub SC16IS752 driver linux - NXP Community I am using SC16is752 UART driver in i2c mode. Section 7.3 of the datasheet explains how to configure the device: https://www.nxp.com/docs/en/data-sheet/SC16IS752_SC16IS762.pdf. Copyright 1995-2023 Texas Instruments Incorporated. What is the name of the oscilloscope-like software shown in this screenshot? This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. tristate "SC16IS752 chips" depends on I2C && GPIOLIB select SERIAL_CORE help gpio driver for SC16IS752 I2C UARTs. I used a raw ESP-C3-13 to verify that these pins could be used as SPI clocks. * If that succeeds, we can allow sharing the interrupt as well. 1 I have bought Waveshare 2-CH RS485 HAT based on SC16IS752. Is there a reliable way to check if a trigger being fired was the result of a DML action from another *specific* trigger? please share the working code for modifying this in to I2C based. So I need to write and compile a device tree overlay for those pins? I have dts updated as per the linux documentation. So far I included the driver module sc16is7xx in the kernel build and I am able to see the device as /dev/ttySC0. 1 In Germany, does an academic position after PhD have an age limit? S: 4:2 a0 80 00 20 00 00 000000 Why wouldn't a plane start its take-off run from the very beginning of the runway to keep the option to utilize the full runway if necessary? @dirkt if I understand correctly, you think that I don't need / there is not more configuration than what can be set in the serial tools (e.g. 2 Initial Question I work with the NXP chip SC16IS740 as a peripheral to an embedded linux system (mainline kernel v4.8). Since such a value cannot be set in the register, sets 54 in the register. What will be add in dtsi file for accessing Uart ? There is a separate Tx worker thread that keeps running and it enabled to send message from device to PC. sc16is7xx_ist call back is setup, guessing probably the dts parsing for interrupt node is wrong. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. class="nav-category mobile-label ">i.MX Securityi.MX Security, class="nav-category mobile-label ">i.MX Trainingi.MX Training, class="nav-category mobile-label ">MCUX SDK DevelopmentMCUX SDK Development. Different combinations of software flow control can be enabled by setting different combinations of EFR[3:0]. Therefore, when using IRQ, an external pull-up resistor is required. If TLR has non-zero trigger level value, * the trigger level defined in FCR is discarded. SC16IS7XX_LSR_REG << SC16IS7XX_REG_SHIFT, &val). Why does this trig equation have only 2 solutions and not 4? The best answers are voted up and rise to the top, Not the answer you're looking for? all flags are empty. 14.7456MHz crystal is used for SC16IS750. Stop reading data from RX FIFO so the. If the receiver interrupt is detected, the interrupt handler will read data from the receiver FIFO of the Bridge IC and store the data. After very short amount of time, I have found that sometimes app reading answers from another port. I am using SC16is752 UART driver in i2c mode. Re: SC16IS752 driver linux - NXP Community Learn more about Stack Overflow the company, and our products. According to the ESP32C3 specifications, these pins can also be used as SPI clocks. pin 37 mosi Infact its not even called during SC16is7xx driver probe. On all boards, the SC16IS752 IRQ pin and the board's IRQ connector are directly connected. debugging the driver in a way. spi mode: 0x0 One of the last installation steps will offer to update your X configuration file. Powered by Discourse, best viewed with JavaScript enabled, tegra210-p3448-0000-p3449-0000-a02-hdr40.dts, tegra210-p3448-0000-p3449-0000-a01-hdr40.dts, Issues with Jetson Nano Production and Jetson-io (and jetpack 4.6 rev1). hardware offering. Stop reading data from RX FIFO so the. Does the conduit for a wall oven need to be pulled inside the cabinet? * EFR, and claiming the same mutex from within the interrupt handler. * However, it's sometimes useful to delay TX even without RTS. The first method is polling the Bridge IC status register regularly. from the debugging in my Linux driver. So overlay changed RTS state after boot, but flags on port are zeroes? kernel. I am trying to configure an SC16IS752 device but my unfamiliarity with linux is getting in the way. * control therefore we try to handle .delay_rts_before_send. Initially it required setting the . To get further assistance directly from NXP, please see our Engineering Services. K: 2:2 00 00 00 00 00 00 000000 What exactly do you want to configure? CC: 7:0 92 80 80 12 00 12 121200 I have dts updated as per the linux documentation. rev2023.6.2.43474. in drivers/serial/makefile obj-$ (CONFIG_SERIAL_SC16IS752) += sx16is752.o in drivers/serial/serial_core.h #define PORT_SC16IS7X2 20 /* SC16IS7x2 SPI UART */ #define PORT_MAX_8250 20 /* max port ID */ pin 16 cs1, tegra210-p3448-0000-p3449-0000-a02-hdr40.dts Table 3 on page 8 of the AN10587 (https://www.nxp.com/docs/en/application-note/AN10587.pdf) shows the interrupt handler read the interrupt identity register to check the interrupt sources such as receiver interrupt. Why setting rs485 mode in device tree is not enough? TIOCM_DSR : mctrl |= (msr & SC16IS7XX_MSR_CD_BIT) ? We are a global semiconductor company that designs, manufactures, tests and sells analog and embedded processing chips. Powertrain and Electrification Analog Drivers, ColdFire/68K Microcontrollers and Processors, Essentials of MQX RTOS Application Development Course - Lab Guides, Graduation/Capstone Projects & NXP Cup Technical Rep, https://www.nxp.com/docs/en/data-sheet/SC16IS752_SC16IS762.pdf, https://www.nxp.com/docs/en/application-note/AN10587.pdf. ret = devm_request_threaded_irq (dev, irq, NULL, sc16is7xx_irq, Stop.make[2]: *** [drivers/serial] Error 2make[1]: *** [drivers] Error 2make[1]: Leaving directory `/usr/local/ti-sdk-am3517-evm/board-support/linux-2.6.37-psp04.02.00.07.sdk'make: *** [linux] Error 2, Your file name should be match with object name, use either SC16is752.c & SC16is752.o or sx16is752.c & sx16is752.o. The maximum transfer speed of SC16IS750 is 14745600/16 = 921,600bps. Usually, the kernel driver (you didn't say which one you are using) should take care of all important configuration stuff, either via the IOCTL interface (which is also used by, Building a safer community: Announcing our new Code of Conduct, Balancing a PhD program with a startup career (Ep. PDF SC16IS752 SC16IS762 - NXP Semiconductors The part is interfaced to microcontroller running linux yocto build and uses i2c. @RobertCNelson Im not familiar with linux, so I dont know how to re enable the config. U: 5:0 00 00 00 00 00 00 000000 SC16IS752 driver linux 10-15-2020 06:52 PM 1,008 Views aneesnorthwales Contributor I I am using SC16is752 UART driver in i2c mode. P: 3:3 00 00 00 00 00 00 000000 Are you sure you want to create this branch? How to say They came, they saw, they conquered in Latin? TIOCM_CTS : mctrl |= (msr & SC16IS7XX_MSR_DSR_BIT) ? SC16IS752 Interrupt bug? Issue #3340 raspberrypi/linux I also cannot find any related driver using find /lib/modules | grep sc16. Autonomous Machines Jetson & Embedded Systems Jetson Nano kernel LeWerner September 22, 2020, 2:58pm 1 Dear Community, I'm currently trying to integrate the SC16IS752 ( SC16IS7xx Datasheet) into one of my Jetson Nano projects. After that I have test /dev/spidev0.0 and getting data null.
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