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Code Issues Releases Wiki Activity

MCP23XXX Refactor (#1560)

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* Refactor MCP23XXX classes to consolidate shared code

* Update test mcp23xxx pin schemas
This commit is contained in:
Jesse Hills
2021-03-08 08:23:54 +13:00
committed by GitHub
parent 69879920eb
commit 570ec36fe3
25 changed files with 603 additions and 740 deletions
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89
esphome/components/mcp23x08_base/mcp23x08_base.cpp Normal file
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#include "mcp23x08_base.h"
#include "esphome/core/log.h"
namespace esphome {
namespace mcp23x08_base {
static const char *TAG = "mcp23x08_base";
bool MCP23X08Base::digital_read(uint8_t pin) {
uint8_t bit = pin % 8;
uint8_t reg_addr = mcp23x08_base::MCP23X08_GPIO;
uint8_t value = 0;
this->read_reg(reg_addr, &value);
return value & (1 << bit);
}
void MCP23X08Base::digital_write(uint8_t pin, bool value) {
uint8_t reg_addr = mcp23x08_base::MCP23X08_OLAT;
this->update_reg(pin, value, reg_addr);
}
void MCP23X08Base::pin_mode(uint8_t pin, uint8_t mode) {
uint8_t iodir = mcp23x08_base::MCP23X08_IODIR;
uint8_t gppu = mcp23x08_base::MCP23X08_GPPU;
switch (mode) {
case mcp23xxx_base::MCP23XXX_INPUT:
this->update_reg(pin, true, iodir);
break;
case mcp23xxx_base::MCP23XXX_INPUT_PULLUP:
this->update_reg(pin, true, iodir);
this->update_reg(pin, true, gppu);
break;
case mcp23xxx_base::MCP23XXX_OUTPUT:
this->update_reg(pin, false, iodir);
break;
default:
break;
}
}
void MCP23X08Base::pin_interrupt_mode(uint8_t pin, mcp23xxx_base::MCP23XXXInterruptMode interrupt_mode) {
uint8_t gpinten = mcp23x08_base::MCP23X08_GPINTEN;
uint8_t intcon = mcp23x08_base::MCP23X08_INTCON;
uint8_t defval = mcp23x08_base::MCP23X08_DEFVAL;
switch (interrupt_mode) {
case mcp23xxx_base::MCP23XXX_CHANGE:
this->update_reg(pin, true, gpinten);
this->update_reg(pin, false, intcon);
break;
case mcp23xxx_base::MCP23XXX_RISING:
this->update_reg(pin, true, gpinten);
this->update_reg(pin, true, intcon);
this->update_reg(pin, true, defval);
break;
case mcp23xxx_base::MCP23XXX_FALLING:
this->update_reg(pin, true, gpinten);
this->update_reg(pin, true, intcon);
this->update_reg(pin, false, defval);
break;
case mcp23xxx_base::MCP23XXX_NO_INTERRUPT:
this->update_reg(pin, false, gpinten);
break;
}
}
void MCP23X08Base::update_reg(uint8_t pin, bool pin_value, uint8_t reg_addr) {
uint8_t bit = pin % 8;
uint8_t reg_value = 0;
if (reg_addr == mcp23x08_base::MCP23X08_OLAT) {
reg_value = this->olat_;
} else {
this->read_reg(reg_addr, &reg_value);
}
if (pin_value)
reg_value |= 1 << bit;
else
reg_value &= ~(1 << bit);
this->write_reg(reg_addr, reg_value);
if (reg_addr == mcp23x08_base::MCP23X08_OLAT) {
this->olat_ = reg_value;
}
}
} // namespace mcp23x08_base
} // namespace esphome