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44 lines
929 B
C++
44 lines
929 B
C++
#include "mcp3008.h"
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#include "esphome/core/helpers.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace mcp3008 {
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static const char *const TAG = "mcp3008";
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float MCP3008::get_setup_priority() const { return setup_priority::HARDWARE; }
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void MCP3008::setup() {
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ESP_LOGCONFIG(TAG, "Setting up mcp3008");
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this->spi_setup();
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}
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void MCP3008::dump_config() {
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ESP_LOGCONFIG(TAG, "MCP3008:");
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LOG_PIN(" CS Pin:", this->cs_);
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}
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float MCP3008::read_data(uint8_t pin) {
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uint8_t data_msb, data_lsb = 0;
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uint8_t command = ((0x01 << 7) | // start bit
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((pin & 0x07) << 4)); // channel number
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this->enable();
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this->transfer_byte(0x01);
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data_msb = this->transfer_byte(command) & 0x03;
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data_lsb = this->transfer_byte(0x00);
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this->disable();
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uint16_t data = encode_uint16(data_msb, data_lsb);
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return data / 1023.0f;
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}
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} // namespace mcp3008
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} // namespace esphome
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