weikai_spi.cpp

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#include "weikai_spi.h"
 
namespace esphome::weikai_spi {
using namespace weikai;
static const char *const TAG = "weikai_spi";
 
uint32_t elapsed_ms(uint32_t &last_time) {
  uint32_t e = millis() - last_time;
  last_time = millis();
  return e;
};
 
const char *p2s(uart::UARTParityOptions parity) {
  using namespace uart;
  switch (parity) {
    case UART_CONFIG_PARITY_NONE:
      return "NONE";
    case UART_CONFIG_PARITY_EVEN:
      return "EVEN";
    case UART_CONFIG_PARITY_ODD:
      return "ODD";
    default:
      return "UNKNOWN";
  }
}
 
void print_buffer(const uint8_t *data, size_t length) {
  char hex_buffer[100];
  hex_buffer[(3 * 32) + 1] = 0;
  for (size_t i = 0; i < length; i++) {
    snprintf(&hex_buffer[3 * (i % 32)], sizeof(hex_buffer), "%02X ", data[i]);
    if (i % 32 == 31) {
      ESP_LOGVV(TAG, "   %s", hex_buffer);
    }
  }
  if (length % 32) {
    // null terminate if incomplete line
    hex_buffer[3 * (length % 32) + 2] = 0;
    ESP_LOGVV(TAG, "   %s", hex_buffer);
  }
}
 
static const char *const REG_TO_STR_P0[16] = {"GENA", "GRST",  "GMUT",  "SPAGE", "SCR", "LCR",  "FCR",  "SIER",
                                              "SIFR", "TFCNT", "RFCNT", "FSR",   "LSR", "FDAT", "FWCR", "RS485"};
static const char *const REG_TO_STR_P1[16] = {"GENA", "GRST", "GMUT", "SPAGE", "BAUD1", "BAUD0", "PRES", "RFTL",
                                              "TFTL", "FWTH", "FWTL", "XON1",  "XOFF1", "SADR",  "SAEN", "RTSDLY"};
 
// method to print a register value as text: used in the log messages ...
const char *reg_to_str(int reg, bool page1) {
  if (reg == WKREG_GPDAT) {
    return "GPDAT";
  } else if (reg == WKREG_GPDIR) {
    return "GPDIR";
  } else {
    return page1 ? REG_TO_STR_P1[reg & 0x0F] : REG_TO_STR_P0[reg & 0x0F];
  }
}
 
enum RegType { REG = 0, FIFO = 1 };            
enum CmdType { WRITE_CMD = 0, READ_CMD = 1 };  
 
inline static uint8_t cmd_byte(RegType fifo, CmdType transfer_type, uint8_t channel, uint8_t reg) {
  return (fifo << 7 | transfer_type << 6 | channel << 4 | reg << 0);
}
 
// The WeikaiRegisterSPI methods
uint8_t WeikaiRegisterSPI::read_reg() const {
  auto *spi_comp = static_cast<WeikaiComponentSPI *>(this->comp_);
  uint8_t cmd = cmd_byte(REG, READ_CMD, this->channel_, this->register_);
  spi_comp->enable();
  spi_comp->write_byte(cmd);
  uint8_t val = spi_comp->read_byte();
  spi_comp->disable();
  char bin_buf[9];
  ESP_LOGVV(TAG, "WeikaiRegisterSPI::read_reg() cmd=%s(%02X) reg=%s ch=%d buf=%02X", format_bin_to(bin_buf, cmd), cmd,
            reg_to_str(this->register_, this->comp_->page1()), this->channel_, val);
  return val;
}
 
void WeikaiRegisterSPI::read_fifo(uint8_t *data, size_t length) const {
  auto *spi_comp = static_cast<WeikaiComponentSPI *>(this->comp_);
  uint8_t cmd = cmd_byte(FIFO, READ_CMD, this->channel_, this->register_);
  spi_comp->enable();
  spi_comp->write_byte(cmd);
  spi_comp->read_array(data, length);
  spi_comp->disable();
#ifdef ESPHOME_LOG_HAS_VERY_VERBOSE
  char bin_buf[9];
  ESP_LOGVV(TAG, "WeikaiRegisterSPI::read_fifo() cmd=%s(%02X) ch=%d len=%d buffer", format_bin_to(bin_buf, cmd), cmd,
            this->channel_, length);
  print_buffer(data, length);
#endif
}
 
void WeikaiRegisterSPI::write_reg(uint8_t value) {
  auto *spi_comp = static_cast<WeikaiComponentSPI *>(this->comp_);
  uint8_t buf[2]{cmd_byte(REG, WRITE_CMD, this->channel_, this->register_), value};
  spi_comp->enable();
  spi_comp->write_array(buf, 2);
  spi_comp->disable();
  char bin_buf[9];
  ESP_LOGVV(TAG, "WeikaiRegisterSPI::write_reg() cmd=%s(%02X) reg=%s ch=%d buf=%02X", format_bin_to(bin_buf, buf[0]),
            buf[0], reg_to_str(this->register_, this->comp_->page1()), this->channel_, buf[1]);
}
 
void WeikaiRegisterSPI::write_fifo(uint8_t *data, size_t length) {
  auto *spi_comp = static_cast<WeikaiComponentSPI *>(this->comp_);
  uint8_t cmd = cmd_byte(FIFO, WRITE_CMD, this->channel_, this->register_);
  spi_comp->enable();
  spi_comp->write_byte(cmd);
  spi_comp->write_array(data, length);
  spi_comp->disable();
 
#ifdef ESPHOME_LOG_HAS_VERY_VERBOSE
  char bin_buf[9];
  ESP_LOGVV(TAG, "WeikaiRegisterSPI::write_fifo() cmd=%s(%02X) ch=%d len=%d buffer", format_bin_to(bin_buf, cmd), cmd,
            this->channel_, length);
  print_buffer(data, length);
#endif
}
 
// The WeikaiComponentSPI methods
void WeikaiComponentSPI::setup() {
  using namespace weikai;
  ESP_LOGCONFIG(TAG, "Setup %s (%d UARTs)", this->get_name(), this->children_.size());
  this->spi_setup();
  // enable all channels
  this->reg(WKREG_GENA, 0) = GENA_C1EN | GENA_C2EN | GENA_C3EN | GENA_C4EN;
  // reset all channels
  this->reg(WKREG_GRST, 0) = GRST_C1RST | GRST_C2RST | GRST_C3RST | GRST_C4RST;
  // initialize the spage register to page 0
  this->reg(WKREG_SPAGE, 0) = 0;
  this->page1_ = false;
 
  // we setup our children channels
  for (auto *child : this->children_) {
    child->setup_channel();
  }
}
 
void WeikaiComponentSPI::dump_config() {
  ESP_LOGCONFIG(TAG,
                "Initialization of %s with %d UARTs completed\n"
                "  Crystal: %" PRIu32,
                this->get_name(), this->children_.size(), this->crystal_);
  if (test_mode_) {
    ESP_LOGCONFIG(TAG,
                  "  Test mode: %d\n"
                  "  Transfer buffer size: %d",
                  test_mode_, XFER_MAX_SIZE);
  }
  LOG_PIN("  CS Pin: ", this->cs_);
 
  for (auto *child : this->children_) {
    child->dump_channel();
  }
}
 
}  // namespace esphome::weikai_spi