bus.c

#include "sx1262/sx1262.h"
#include "sx1262/sx126x.h"
#include "sx1262/sx126x_hal.h"
#include "mculibrary.h"
 
/*
 * PINS:
 * SX1262   STM32
 *
 * CSN      PB12  112 (NSS)
 * SCLK     PB13  113
 * MOSI     PB15  115
 * MISO     PB14  114
 * DIO1     PA0   000
 * BUSY     PC5   205
 * nRESET   PC13  213
 *
 * connected to spi port #2
 */
 
// return non-zero if timeout
int wait_for_chip(struct network_context *nctx) {
  uint32_t started = 0;
 
  for (started = 0; started < 0x0000FFFF; started++) {
    int p = mculib_pin_get(nctx->mculib_handle, SX1262_BUSY);
    if (p == 0) {
      return 0;
    }
  }
  printf("[sx1262] timeout\r\n");
  return 1;
}
sx126x_hal_status_t sx126x_hal_read(struct network_context *nctx, const uint8_t *command, const uint16_t command_length,
                                    uint8_t *data, const uint16_t data_length) {
  //printf("read called (%i bytes data buf)\r\n",data_length);
  //print_buf(command_length,command);
  int i;
  int r;
 
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 1);
  MCULIB_ERR_RET("RD_CSN1", r);
  //  Delay(100);
  wait_for_chip(nctx);
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 0);
  MCULIB_ERR_RET("RD_CSN0", r);
  uint16_t res;
 
  for (i = 0; i < command_length; i++) {
    r = mculib_spi_write_and_read(nctx->mculib_handle, 2, command[i], &res);
    MCULIB_ERR_RET("RD_READ", r);
    //printf("16 bit res: %i\r\n",res);
  }
  for (i = 0; i < data_length; i++) {
    r = mculib_spi_write_and_read(nctx->mculib_handle, 2, 0, &res);
    MCULIB_ERR_RET("RD_STATUS", r);
    //printf("16 bit extra res: %x\r\n",res);
    data[i] = res;
  }
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 1);
  return 0;
}
 
sx126x_hal_status_t sx126x_hal_write(struct network_context *nctx, const uint8_t *command, const uint16_t command_length, const uint8_t *data, const uint16_t data_length) {
  //  printf("write %i/%i:", command_length,data_length);
  //print_buf(command_length, command);
  int i;
  int r;
 
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 1);
  MCULIB_ERR_RET("WR_CSN1", r);
  //  Delay(100);
  wait_for_chip(nctx);
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 0);
  MCULIB_ERR_RET("WR_CSN0", r);
  uint16_t res;
 
  for (i = 0; i < command_length; i++) {
    r = mculib_spi_write_and_read(nctx->mculib_handle, 2, command[i], &res);
    MCULIB_ERR_RET("WR_WRITE", r)
    // get status??
    //      printf("Status: %x\r\n",res);
  }
  for (i = 0; i < data_length; i++) {
    r = mculib_spi_write_and_read(nctx->mculib_handle, 2, data[i], &res);
    MCULIB_ERR_RET("WR_STATUS", r)
    // get status??
    //    printf("Status: %x\r\n", res);
  }
 
  /*
   * r=    mculib_spi_write_and_read(2,0,&res);
   * printf("Status: %x\r\n",res);
   * r=    mculib_spi_write_and_read(2,0,&res);
   * printf("Status: %x\r\n",res);
   */
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 1);
  return 0;
}
 
 
sx126x_hal_status_t sx126x_hal_reset(struct network_context *nctx) {
  printf("[sx1262] Reset called\r\n");
  int r = mculib_pin_set(nctx->mculib_handle, SX1262_RESET, 0);
 
  MCULIB_ERR_RET("RESET0", r);
  Delay(100);
  r = mculib_pin_set(nctx->mculib_handle, SX1262_RESET, 1);
  MCULIB_ERR_RET("RESET1", r);
  return 0;
}
sx126x_hal_status_t sx126x_hal_wakeup(struct network_context *nctx) {
  int r;
 
  printf("[sx1262] wakeup called\r\n");
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 0);
  MCULIB_ERR_RET("WK_CSNSETPIN", r);
  r = mculib_spi_write_only(nctx->mculib_handle, 2, 0);
  MCULIB_ERR_RET("WK_WRITE1", r)
  r = mculib_spi_write_only(nctx->mculib_handle, 2, 0);
  MCULIB_ERR_RET("WK_WRITE2", r)
  r = mculib_pin_set(nctx->mculib_handle, SX1262_CSN, 1);
  MCULIB_ERR_RET("WK_XSN", r);
 
  return 0;
}