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View Code? Open in Web Editor NEWESP-IDF (C) driver for the MCP23008 GPIO expander
License: MIT License
ESP-IDF (C) driver for the MCP23008 GPIO expander
License: MIT License
in mcp23008_read_reg() the last i2c_master_read_byte() should be NACK_VAL. (line 53)
described in the documentation here:
Compared to writing data, the command link is populated in Step 4 not with i2c_master_write... functions but with i2c_master_read_byte() and/or i2c_master_read(). Also, the last read in Step 5 is configured so that the master does not provide the ACK bit.
To set the bit, the operation should be |=, not &=
so, the function should be:
esp_err_t mcp23008_port_set_bit(mcp23008_t *mcp, uint8_t b) {
mcp->current |= (1 << b);
return mcp23008_write_port(mcp, mcp->current);
}
otherwise, good job on the library...
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