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Add an option to force SPI into software mode, useful when (#4556)
reusing pins for different purposes.
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parent
3d4c0e6667
commit
a8bb2a42a1
3 changed files with 6 additions and 1 deletions
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@ -17,6 +17,7 @@ spi_ns = cg.esphome_ns.namespace("spi")
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SPIComponent = spi_ns.class_("SPIComponent", cg.Component)
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SPIDevice = spi_ns.class_("SPIDevice")
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MULTI_CONF = True
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CONF_FORCE_SW = "force_sw"
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CONFIG_SCHEMA = cv.All(
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cv.Schema(
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@ -25,6 +26,7 @@ CONFIG_SCHEMA = cv.All(
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cv.Required(CONF_CLK_PIN): pins.gpio_output_pin_schema,
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cv.Optional(CONF_MISO_PIN): pins.gpio_input_pin_schema,
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cv.Optional(CONF_MOSI_PIN): pins.gpio_output_pin_schema,
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cv.Optional(CONF_FORCE_SW, default=False): cv.boolean,
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}
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),
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cv.has_at_least_one_key(CONF_MISO_PIN, CONF_MOSI_PIN),
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@ -39,6 +41,7 @@ async def to_code(config):
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clk = await cg.gpio_pin_expression(config[CONF_CLK_PIN])
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cg.add(var.set_clk(clk))
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cg.add(var.set_force_sw(config[CONF_FORCE_SW]))
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if CONF_MISO_PIN in config:
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miso = await cg.gpio_pin_expression(config[CONF_MISO_PIN])
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cg.add(var.set_miso(miso))
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@ -25,7 +25,7 @@ void SPIComponent::setup() {
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this->clk_->digital_write(true);
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#ifdef USE_SPI_ARDUINO_BACKEND
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bool use_hw_spi = true;
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bool use_hw_spi = !this->force_sw_;
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const bool has_miso = this->miso_ != nullptr;
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const bool has_mosi = this->mosi_ != nullptr;
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int8_t clk_pin = -1, miso_pin = -1, mosi_pin = -1;
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@ -74,6 +74,7 @@ class SPIComponent : public Component {
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void set_clk(GPIOPin *clk) { clk_ = clk; }
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void set_miso(GPIOPin *miso) { miso_ = miso; }
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void set_mosi(GPIOPin *mosi) { mosi_ = mosi; }
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void set_force_sw(bool force_sw) { force_sw_ = force_sw; }
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void setup() override;
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@ -260,6 +261,7 @@ class SPIComponent : public Component {
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GPIOPin *miso_{nullptr};
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GPIOPin *mosi_{nullptr};
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GPIOPin *active_cs_{nullptr};
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bool force_sw_{false};
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#ifdef USE_SPI_ARDUINO_BACKEND
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SPIClass *hw_spi_{nullptr};
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#endif // USE_SPI_ARDUINO_BACKEND
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