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| interfaces:slicepi [2014/12/31 14:26] – created darron | interfaces:slicepi [2024/07/10 12:30] (current) – external edit 127.0.0.1 | ||
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| ==== Slice of Pi/O ==== | ==== Slice of Pi/O ==== | ||
| <wrap right> | <wrap right> | ||
| - | {{:boards:pio.jpg?200}} | + | {{:interfaces:rpipio.jpg? |
| + | \\ \\ | ||
| + | {{: | ||
| </ | </ | ||
| The Slice of Pi/O is an I2C expansion board for the Raspberry Pi. | The Slice of Pi/O is an I2C expansion board for the Raspberry Pi. | ||
| - | == Power == | + | === Power === |
| The Slice of Pi/O may be configured in 3V3 or 5V modes of operation | The Slice of Pi/O may be configured in 3V3 or 5V modes of operation | ||
| - | via a jumper | + | via a jumper. |
| + | |||
| + | Power may be taken from the board on PWR and GND if | ||
| a suitable 4-pin header is fitted. | a suitable 4-pin header is fitted. | ||
| - | == RPi I2C == | + | === RPi I2C === |
| - | Enable I2C on the RPi as root. | + | |
| + | == Without device tree == | ||
| < | < | ||
| sed -i ' | sed -i ' | ||
| - | echo ' | + | </ |
| + | |||
| + | == With device tree == | ||
| + | < | ||
| + | echo " | ||
| + | </ | ||
| + | |||
| + | == With and without device tree == | ||
| + | < | ||
| + | echo ' | ||
| echo " | echo " | ||
| echo ' | echo ' | ||
| Line 21: | Line 35: | ||
| </ | </ | ||
| - | For the MCP23017 a baudrate of 900000 has been tested and appears to work | + | For the MCP23017 a baudrate of 900000 has been tested and appears to work satisfactorily. You should experiment with this value. |
| - | satisfactorily. You should experiment with this value. | + | |
| - | == I/O == | + | === I/O === |
| - | ^RPi version ^I2C device ^Default MCP Address| | + | ^RPi revision ^I2C device ^Default MCP Address| |
| | 1 |/ | | 1 |/ | ||
| | 2 |/ | | 2 |/ | ||
| - | ==== k8048 Microchip PIC programmer ==== | + | === Pickle |
| Low Voltage Programming with VPP at 3V3 or 5V | Low Voltage Programming with VPP at 3V3 or 5V | ||
| Separate data I/O connections (only supported option) | Separate data I/O connections (only supported option) | ||
| + | |||
| + | ==Wiring== | ||
| < | < | ||
| Line 55: | Line 70: | ||
| - Not used by all LVP compatible devices. | - Not used by all LVP compatible devices. | ||
| + | ==Config== | ||
| + | < | ||
| + | VPP=0 # A0 | ||
| + | PGC=1 # A1 | ||
| + | PGDO=2 | ||
| + | PGDI=3 | ||
| + | PGM=-1 | ||
| + | DEVICE=MCP230XX | ||
| + | IFACE=/ | ||
| + | ADDR=0x20 | ||
| + | SLEEP=0 | ||
| + | #VPP_RUN + PGD_IN_PULLUP | ||
| + | BITRULES=0x1010 | ||
| + | </ | ||
| + | ===Resources=== | ||
| + | |||
| + | {{downloads: | ||
