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mcp23017: read output latch registers during setup (#3744)

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andyboeh
2022-08-31 00:07:40 +02:00
committed by GitHub
parent 84bac8356a
commit b2199d5464
5 changed files with 18 additions and 0 deletions
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4
esphome/components/mcp23s17/mcp23s17.cpp
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@@ -23,6 +23,10 @@ void MCP23S17::setup() {
this->transfer_byte(0b00011000); // Enable HAEN pins for addressing
this->disable();
// Read current output register state
this->read_reg(mcp23x17_base::MCP23X17_OLATA, &this->olat_a_);
this->read_reg(mcp23x17_base::MCP23X17_OLATB, &this->olat_b_);
if (this->open_drain_ints_) {
// enable open-drain interrupt pins, 3.3V-safe
this->write_reg(mcp23x17_base::MCP23X17_IOCONA, 0x04);