The CSB pin can be pulled high after the command is sent or after the end of the command execution (for example end of conversion). The pin CSB (Chip Select) is used to enable/disable the interface, so that other devices can talk on the same SPI bus. The sensor responds on the output SDO (Serial Data Out). In the SPI mode module can accept both mode 0 and mode 3 for the clock polarity and phase. The external microcontroller clocks in the data through the input SCLK (Serial CLocK) and SDI (Serial Data In). No, I have no idea whether it is well behaved or not. MS5611-01BA03 Barometric Pressure Sensor, with stainless steel cap You could have put a description in your link e.g. and then if it passes the MISO test, simply create a 7 pin SPI programming header, with the extra pin used for a 10k pullup on slave select to keep the slave deselected during programming.Ĭan anyone offer any advice if this simple idea will work? So I'm thinking to do the MISO test here: Once the MCU has been programmed the slave select pin will be driven high after startup, so I don't see why a pullup is required here. I've read that on some SPI devices the MISO line is not properly tri-stated, and that a buffer is required, but I've got no reason to suspect that this is the case for the device I'm using, and the datasheet clearly shows logic traces where the MISO line is floating before and after communication with the SPI master. Pullups on some other combination of pins. Pullup on slave select and a tri-state buffer on MISO.Ĥ. I've also seen a few application notes, and I still don't understand what will definitely work.Ģ. So far I've read about 10 different threads and sources of information here and elsewhere, and they all seem to suggest different things. I'm designing the PCB and I've been trying to work out if the slave device will interfere with SPI programming of the ATMega 328p. The board is connected using the UEXT connector.My project has an ATMega 328p master with an SPI slave device. The steps should also work with a iCE40HX1K-EVB. This example uses the OLIMEXINO-32U4 to flash a Olimex iCE40HX8K-EVB. If you try this, let me know! Flashing iCE40HX8K-EVB from Olimex Python3 spi_flash_programmer_client.py -f -flash-offset 16711680 -file-offset 4128768 verify Python3 spi_flash_programmer_client.py -f -flash-offset 16711680 -file-offset 4128768 write Write the ART partition to the final 64k of the chip (the magic numbers are 16M-64K and 4M-64K respectively). Python3 spi_flash_programmer_client.py -s 4096 -f verify Python3 spi_flash_programmer_client.py -s 4096 -f write Python3 spi_flash_programmer_client.py -s 4096 -f read
I guess if you do a system upgrade which puts the kernel image somewhere after the first 4MB you might be in trouble, so upgrade u-boot before doing that. So all you need to do is copy the image and write the ART (wireless firmware) partition to the right spot, which is right at the end of Flash. U-Boot still thinks the chip is 4MB large, but Linux doesn't seem to care. Recent versions of OpenWRT detect the larger Flash and automatically use it, so you don't need to do any patching. I used this to write a 16MB flash chip for the wr703n router running OpenWRT. To the extent possible under law, the authors below have waived all copyright and related or neighboring rights to spi-flash-programmer. You'll have to edit the value in both the.
# Help text > python3 spi_flash_programmer_client.py -h # Override ChipSelect pin # Example: use IO pin 13/0xd > python3 spi_flash_programmer_client.py \
383/1024 - 00:01:13 # Set IO Pin value # Example: IO pin 0x2, set to LOW > python3 spi_flash_programmer_client.py \ # Erase flash > python3 spi_flash_programmer_client.py \ > -d /dev/cu.usbserial -l 4096 -f dump.bin verify # Verify flash > python3 spi_flash_programmer_client.py \ > -d /dev/ttyS1 -l 4096 -f dump.bin write # Write flash (sectors are erased automatically) > python3 spi_flash_programmer_client.py \ # Read flash > python3 spi_flash_programmer_client.py \Ĭonnected to 'SPI Flash programmer v1.0 ' # Listing serial ports > python3 spi_flash_programmer_client.py ports