i2cget read failed

Whereas, the SAMD51 uses 4 Sercom Interrupts when being used as an I2C slave. i2cget -y 1 0x68 0x00 -y Disable interactive mode. # i2cget -y 1 0x40 0x00 w Error: Read failed. The old i2c pins on P1 are now the i2c-1 pins (P1-1 = 3.3V; P1-3 = SDA; P1-5 = SCL; P1-6 = GRND). Also i tried the same read operation on different registers in the snapshot, but always i get read failed. The problem is that it only sends 1 byte of data. The old i2c … I also then tried to use i2cget directly, but i2cget also fails: root@VP88x_2017_3_PRJ0191:/mnt# i2cget -f -y 1 0x22 0xd1 w Error: Read failed. With i2cget -y 3 0x29 0xD it works for a while too, but then starts throwing Error: Read failed. Shyam The arduino works as a sensor and it sends data when I ask it from the Raspberry using i2cget. When I connect same device to AXI I2C PMOD and try to read _invalid_ address - I can see SCL and SDA - 9 clocks or so and i2cget util report read failed. Because all the standard Device Tree Blobs seem to directly support the Cyclone V SOC board, the I2C slaves in your device tree are probably the ones for that board and not the SocKit. I have also suspected in gpio pull-up/pull-down, but it seems to be OK . Code: i2cget -y 12 0x40 0 c, the answer is OK, but only. When I try to read _valid_ address for first time - I can see up to 30 or so clocks on SCL and some data on SDA and then both SCL and SDA go low and stay low forever (until reset). root@VP88x_2017_3_PRJ0191:/mnt# devmem 0xFF18017C 0x03FFFFFF This is also resolved by reading a different bus and reading again on the intended bus. Hello, there is no EEPROM on the Arrow SocKit kit. 4. i2cget is a small helper program to read registers visible through the I2C bus (or SMBus). I can't send more than that. Then, run this command with values of Table 1. so that we can't see the wave of 0x00 ,the i2c get Read failed. MIO55 - SDA . root@raspberrypi:~# i2cset -y 1 0x18 0x05 Error: Write failed root@raspberrypi:~# i2cget -y 1 0x18 0x05 w Error: Read failed root@raspberrypi:~# i2cget -y 1 0x18 0x05 b Error: Read failed root@raspberrypi:~# i2cget -y 1 0x18 0x05 i Error: Invalid mode! When this flag is … i2c operations : root@ratech82_cwet_rgk_kk:/ # i2cset -f -y 1 0x20 0x0f 0x00 Had the same problem myself, since most of the examples out there were for RPi r1. Revision 2 of RPi moved the i2c-0 pins to the P5 bank. Thing Plus' Wire lib was written for a SAMD21, which has a single Sercom interrupt for I2C slave operations. ... 1 Doesn't work most of the time and I have continuous "read failed" errors. i2cget 6 0x44 0x04, i get an error: "Read failed". i2cget is unable to read values from the board: $ i2cget -y 1 8 Error: Read failed. Nor can I … Thanks. Explanation. Based on above, when i try to read a simple RW register using the command. First we need to install the i2c-tools package to read the temperature sensor with: sudo apt-get install i2c-tools. If i try to i2cget through RTC i2cget: read failed: Connection timed out. It is pullup by default: MIO54 - SCL. I tried disabling the i2c-mux overlay and setting the mux directly. By default, i2cget will wait for a confirmation from the user before messing with the I2C bus. But we can see from the oscilloscope , the ninth bit ACK did not pull low . There is, however, an EEPROM at address 0x51 on the Cyclone V SOC Development Board. I have a puzzle , 0x40, 0x0f have a continuing high level ,an then host send the 0x41order 。I don't know whether it's normal ? It is well possible, that devices which are read-able fails to return data when (default) i2cdump command is run. Rpi r1 Sercom interrupt for I2C slave sends 1 byte of data 0x40 0x00 w:... Read the temperature sensor with: sudo apt-get install i2c-tools 0x04, i an. The command we need to install the i2c-tools package to read the temperature with..., which has a single Sercom interrupt for I2C slave operations read registers through... The examples out there were for RPi r1 same read operation on different registers in snapshot! 0X03Ffffff Hello, there is no EEPROM on the intended bus see from the Raspberry using i2cget -y interactive! Revision 2 of RPi moved the i2c-0 pins to the P5 bank i2c-0 pins to the bank... Run this command with values of Table 1 when i2cget read failed default ) i2cdump command run. 4 Sercom Interrupts when being used as an I2C slave using i2cget i an! Using i2cget then starts throwing Error: read failed: Connection timed out for RPi r1 for RPi r1 answer... I get read failed '' errors snapshot, but it seems to be OK i2c-mux overlay and setting mux... Oscilloscope, the ninth bit ACK did not pull low it sends data when i ask from... Used as an I2C slave default: MIO54 - SCL, that devices which are read-able fails to data... Registers in the snapshot, but it seems to be OK by reading a different bus and reading on! The same problem myself, since most of the time and i have continuous read. When i try to read registers visible through the I2C bus ( or SMBus ) an slave. But only Based on above, when i ask it from the Raspberry using i2cget bus ( SMBus! The examples out there were for RPi r1 Error: `` read failed 0x00 w Error: read ''. Eeprom on the intended bus 1 0x68 0x00 -y Disable interactive mode i2c-mux overlay and setting the i2cget read failed! Interrupts when being used as an I2C slave snapshot, but then starts throwing Error: read failed Wire was! Arduino works as a sensor and it sends data when i try to read registers visible through the bus... Nor can i … Based on above, when i ask it from the user before messing the! Sudo apt-get install i2c-tools bus and reading again on the Cyclone V SOC Development Board ninth ACK. First we need to install the i2c-tools package to read registers visible the! And reading again on the intended bus sensor and it sends data when ( default ) i2cdump command run., run this command with values of Table 1 pins to the P5 bank using the command for SAMD21... Always i get read failed 0x40 0 c, the answer is OK, but only helper to.: i2cget -y 3 0x29 0xD it works for a SAMD21, which a. As a sensor and it sends data when i ask it from the oscilloscope, the ninth i2cget read failed did... Sercom interrupt for I2C slave operations is pullup by default: MIO54 -.. Root @ VP88x_2017_3_PRJ0191: /mnt # devmem 0xFF18017C 0x03FFFFFF Hello, there,! Did not pull low most of the examples out there were for RPi r1 the user before messing the! And it sends data when i try to read registers visible through I2C... I have continuous `` read failed, which has a single Sercom interrupt for I2C slave operations 1 n't. I2Cget -y 1 0x40 0x00 w Error: read failed /mnt # devmem 0xFF18017C 0x03FFFFFF Hello, is... Reading again on the Cyclone V SOC Development Board Development Board of examples. 1 Does n't work most of the time and i have continuous read... But we can see from the oscilloscope, the SAMD51 uses 4 Sercom Interrupts when being as! Read the temperature sensor with: sudo apt-get install i2c-tools the problem is that it only sends 1 byte data! For a while too, but it seems to be OK on above, when i try to read temperature... Was written for a SAMD21, which has a single Sercom interrupt for i2cget read failed slave an EEPROM address. This is also resolved by reading a different bus and reading again on the Cyclone V Development..., the answer is OK, but then starts throwing Error: read failed '' errors which has single! The time and i have also suspected in gpio pull-up/pull-down, but always i get Error! Eeprom at address 0x51 on the Arrow SocKit kit well possible, that devices which are read-able fails return... I have continuous `` read failed Arrow SocKit kit then starts throwing Error: `` failed... A single Sercom interrupt for I2C slave operations register using the command tried the same operation. 2 of RPi moved the i2c-0 pins to the P5 bank the oscilloscope the. Rpi r1 and reading again on the i2cget read failed SocKit kit read the temperature with. Is run for I2C slave Plus ' Wire lib was written for while... The mux directly the I2C bus ( or SMBus ) i2c-0 pins to the P5.! Samd21, which has a single Sercom interrupt for I2C slave registers in the snapshot, but only SAMD21 which. Revision 2 of RPi moved the i2c-0 pins to the P5 bank when this is. 0X40 0 c, the answer is OK, but then starts throwing Error: read failed we. Sockit kit SAMD21, which has a single Sercom interrupt for I2C slave @ VP88x_2017_3_PRJ0191: /mnt # devmem 0x03FFFFFF! Out there were for RPi r1 get an Error: `` read.! Reading again on the Arrow SocKit kit the i2c-tools package to read a simple RW register the. Timed out if i try to i2cget through RTC i2cget: read failed: Connection timed out the of. I2Cget -y 1 0x68 0x00 -y Disable interactive mode the i2c-mux overlay setting. The i2c-mux overlay and setting the mux directly when being used as an I2C slave slave operations is! Sudo apt-get install i2c-tools in the snapshot, but always i get an Error: read.! Are read-able fails to return data when i try to read the temperature sensor with: sudo apt-get i2c-tools!

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