RE: Renesas Solution Starter Kit for RX23E-A: build and run the Thermocouple application

Jan Cumps — Mon, 17 Jul 2023 18:57:45 GMT

A few captures while running the code:

2 DACs read

R_Config_DSAD0_Get_ValueResult( &dsad0_reg);
R_Config_DSAD1_Get_ValueResult( &dsad1_reg);

From 2 complement to signed int

 /** Flag mask, Sign extension */
 dsad0_value = (int32_t) ((dsad0_reg & 0x00FFFFFFU) << 8) >> 8;
 /** Flag mask, Sign extension */
 dsad1_value = (int32_t) ((dsad1_reg & 0x00FFFFFFU) << 8) >> 8;

Convert ref junction to temp


float R_RTD_DsadToTemp (float dsad)
{
 float rrtd = (D_RTD_GAIN * dsad) + D_RTD_OFFSET; /** Convert DSAD Value to RTD resistance value [ohm] */
 uint16_t idx = R_CALC_BinarySearch(s_rtd_table, D_RTD_TABLE_SIZE, rrtd);

/** Set a temperature range that includes the value of the argument */
 float x0 = s_rtd_table[idx]; /** x0:Temperature range lower limit resistance [ohm] */
 float x1 = s_rtd_table[idx + 1]; /** x1:Temperature range upper limit resistance [ohm] */

/** convert idx to temperature */
 float y0 = (float) idx + D_RTD_TABLE_TOP_TEMPARATURE;

/** convert idx + 1 to temperature */
 float y1 = (float) (idx + 1) + D_RTD_TABLE_TOP_TEMPARATURE;

float f_temp = R_CALC_Lerp(x0, y0, x1, y1, rrtd); /** Calculated temperature [degree] */

return f_temp;
}

etc....

RE: Renesas Solution Starter Kit for RX23E-A: build and run the Thermocouple application

shabaz — Fri, 23 Jun 2023 15:34:13 GMT

Very interesting! The e2studio is also used for Renesas RA microcontrollers too, so it's good to see that the experience using it is transferrable.

That Flash Programmer looks neat, it could be useful for in-the-field upgrades. Is that using the bootloader inside the RX chip, or is it some other chip on the development board?