fix(adc): fix s2 cali loss resolution

Bruce297 · Bruce297 · commit 3f9f2187aba6 · 2025-04-01T17:19:11.000+08:00
diff --git a/components/esp_adc/esp32s2/adc_cali_line_fitting.c b/components/esp_adc/esp32s2/adc_cali_line_fitting.c
@@ -143,7 +143,7 @@ static esp_err_t cali_raw_to_voltage(void *arg, int raw, int *voltage)
     //pointers are checked in the upper layer
 
     cali_chars_line_fitting_t *ctx = arg;
-    *voltage = raw * ctx->coeff_a / coeff_a_scaling + ctx->coeff_b / coeff_b_scaling;
+    *voltage = (raw * ctx->coeff_a / (coeff_a_scaling / coeff_b_scaling) + ctx->coeff_b) / coeff_b_scaling;
 
     return ESP_OK;
 }

Original file line number	Diff line number	Diff line change
`@@ -143,7 +143,7 @@ static esp_err_t cali_raw_to_voltage(void arg, int raw, int voltage)`
`143`	`143`	`//pointers are checked in the upper layer`
`144`	`144`
`145`	`145`	`cali_chars_line_fitting_t *ctx = arg;`
`146`		`- voltage = raw ctx->coeff_a / coeff_a_scaling + ctx->coeff_b / coeff_b_scaling;`
	`146`	`+ voltage = (raw ctx->coeff_a / (coeff_a_scaling / coeff_b_scaling) + ctx->coeff_b) / coeff_b_scaling;`
`147`	`147`
`148`	`148`	`return ESP_OK;`
`149`	`149`	`}`