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Add HW SPI support (#623)
* Add HW SPI support * Update spi.cpp * Lint * ESP32 Compile Fix
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parent
d2be58ba31
commit
75630a36f8
2 changed files with 93 additions and 15 deletions
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@ -8,20 +8,10 @@ namespace spi {
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static const char *TAG = "spi";
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template<SPIClockPolarity CLOCK_POLARITY> void SPIComponent::enable(GPIOPin *cs, uint32_t wait_cycle) {
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this->debug_enable(cs->get_pin());
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this->wait_cycle_ = wait_cycle;
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this->clk_->digital_write(CLOCK_POLARITY);
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this->active_cs_ = cs;
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this->active_cs_->digital_write(false);
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}
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template void SPIComponent::enable<CLOCK_POLARITY_LOW>(GPIOPin *cs, uint32_t wait_cycle);
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template void SPIComponent::enable<CLOCK_POLARITY_HIGH>(GPIOPin *cs, uint32_t wait_cycle);
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void ICACHE_RAM_ATTR HOT SPIComponent::disable() {
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if (this->hw_spi_ != nullptr) {
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this->hw_spi_->endTransaction();
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}
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ESP_LOGVV(TAG, "Disabling SPI Chip on pin %u...", this->active_cs_->get_pin());
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this->active_cs_->digital_write(true);
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this->active_cs_ = nullptr;
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@ -30,6 +20,53 @@ void SPIComponent::setup() {
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ESP_LOGCONFIG(TAG, "Setting up SPI bus...");
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this->clk_->setup();
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this->clk_->digital_write(true);
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bool use_hw_spi = true;
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if (this->clk_->is_inverted())
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use_hw_spi = false;
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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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if (has_miso && this->miso_->is_inverted())
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use_hw_spi = false;
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if (has_mosi && this->mosi_->is_inverted())
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use_hw_spi = false;
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int8_t clk_pin = this->clk_->get_pin();
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int8_t miso_pin = has_miso ? this->miso_->get_pin() : -1;
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int8_t mosi_pin = has_mosi ? this->mosi_->get_pin() : -1;
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#ifdef ARDUINO_ARCH_ESP8266
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if (clk_pin == 6 && miso_pin == 7 && mosi_pin == 8) {
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// pass
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} else if (clk_pin == 14 && miso_pin == 12 && mosi_pin == 13) {
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// pass
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} else {
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use_hw_spi = false;
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}
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if (use_hw_spi) {
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this->hw_spi_ = &SPI;
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this->hw_spi_->pins(clk_pin, miso_pin, mosi_pin, 0);
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this->hw_spi_->begin();
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return;
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}
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#endif
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#ifdef ARDUINO_ARCH_ESP32
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static uint8_t spi_bus_num = 0;
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if (spi_bus_num >= 2) {
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use_hw_spi = false;
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}
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if (use_hw_spi) {
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if (spi_bus_num == 0) {
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this->hw_spi_ = &SPI;
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} else {
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this->hw_spi_ = new SPIClass(VSPI);
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}
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spi_bus_num++;
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this->hw_spi_->begin(clk_pin, miso_pin, mosi_pin);
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return;
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}
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#endif
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if (this->miso_ != nullptr) {
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this->miso_->setup();
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}
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@ -43,6 +80,7 @@ void SPIComponent::dump_config() {
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LOG_PIN(" CLK Pin: ", this->clk_);
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LOG_PIN(" MISO Pin: ", this->miso_);
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LOG_PIN(" MOSI Pin: ", this->mosi_);
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ESP_LOGCONFIG(TAG, " Using HW SPI: %s", YESNO(this->hw_spi_ != nullptr));
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}
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float SPIComponent::get_setup_priority() const { return setup_priority::BUS; }
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@ -2,6 +2,7 @@
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#include "esphome/core/component.h"
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#include "esphome/core/esphal.h"
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#include <SPI.h>
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namespace esphome {
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namespace spi {
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@ -67,11 +68,18 @@ class SPIComponent : public Component {
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void dump_config() override;
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE> uint8_t read_byte() {
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if (this->hw_spi_ != nullptr) {
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return this->hw_spi_->transfer(0x00);
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}
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return this->transfer_<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE, true, false>(0x00);
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}
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE>
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void read_array(uint8_t *data, size_t length) {
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if (this->hw_spi_ != nullptr) {
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this->hw_spi_->transfer(data, length);
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return;
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}
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for (size_t i = 0; i < length; i++) {
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data[i] = this->read_byte<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE>();
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}
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@ -79,11 +87,20 @@ class SPIComponent : public Component {
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE>
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void write_byte(uint8_t data) {
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if (this->hw_spi_ != nullptr) {
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this->hw_spi_->write(data);
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return;
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}
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this->transfer_<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE, false, true>(data);
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}
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE>
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void write_array(const uint8_t *data, size_t length) {
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if (this->hw_spi_ != nullptr) {
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auto *data_c = const_cast<uint8_t *>(data);
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this->hw_spi_->writeBytes(data_c, length);
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return;
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}
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for (size_t i = 0; i < length; i++) {
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this->write_byte<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE>(data[i]);
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}
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@ -91,17 +108,39 @@ class SPIComponent : public Component {
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE>
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uint8_t transfer_byte(uint8_t data) {
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if (this->hw_spi_ != nullptr) {
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return this->hw_spi_->transfer(data);
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}
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return this->transfer_<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE, true, true>(data);
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}
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE>
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void transfer_array(uint8_t *data, size_t length) {
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if (this->hw_spi_ != nullptr) {
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this->hw_spi_->transfer(data, length);
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return;
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}
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for (size_t i = 0; i < length; i++) {
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data[i] = this->transfer_byte<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE>(data[i]);
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}
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}
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template<SPIClockPolarity CLOCK_POLARITY> void enable(GPIOPin *cs, uint32_t wait_cycle);
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template<SPIBitOrder BIT_ORDER, SPIClockPolarity CLOCK_POLARITY, SPIClockPhase CLOCK_PHASE, uint32_t DATA_RATE>
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void enable(GPIOPin *cs) {
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SPIComponent::debug_enable(cs->get_pin());
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if (this->hw_spi_ != nullptr) {
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uint8_t data_mode = (uint8_t(CLOCK_POLARITY) << 1) | uint8_t(CLOCK_PHASE);
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SPISettings settings(DATA_RATE, BIT_ORDER, data_mode);
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this->hw_spi_->beginTransaction(settings);
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} else {
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this->clk_->digital_write(CLOCK_POLARITY);
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this->wait_cycle_ = uint32_t(F_CPU) / DATA_RATE / 2ULL;
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}
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this->active_cs_ = cs;
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this->active_cs_->digital_write(false);
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}
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void disable();
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@ -121,6 +160,7 @@ 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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SPIClass *hw_spi_{nullptr};
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uint32_t wait_cycle_;
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};
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@ -138,7 +178,7 @@ class SPIDevice {
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this->cs_->digital_write(true);
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}
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void enable() { this->parent_->template enable<CLOCK_POLARITY>(this->cs_, uint32_t(F_CPU) / DATA_RATE / 2ULL); }
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void enable() { this->parent_->template enable<BIT_ORDER, CLOCK_POLARITY, CLOCK_PHASE, DATA_RATE>(this->cs_); }
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void disable() { this->parent_->disable(); }
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