From a1decd342779ca8d32a048e8d1e7541bfd1e15e1 Mon Sep 17 00:00:00 2001
From: giedriuslt <123905703+giedriuslt@users.noreply.github.com>
Date: Fri, 9 Feb 2024 15:32:02 +0200
Subject: [PATCH] Add temperature to BL602 (#1067)

Co-authored-by: openshwprojects <85486843+openshwprojects@users.noreply.github.com>
---
 src/httpserver/http_fns.c | 80 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 76 insertions(+), 4 deletions(-)

diff --git a/src/httpserver/http_fns.c b/src/httpserver/http_fns.c
index be6cd30af..55841a043 100644
--- a/src/httpserver/http_fns.c
+++ b/src/httpserver/http_fns.c
@@ -25,6 +25,9 @@ static char SUBMIT_AND_END_FORM[] = "<br><input type=\"submit\" value=\"Submit\"
 // nothing
 #elif PLATFORM_BL602
 #include <bl_sys.h>
+#include <bl_adc.h>     //  For BL602 ADC HAL
+#include <bl602_adc.h>  //  For BL602 ADC Standard Driver
+#include <bl602_glb.h>  //  For BL602 Global Register Standard Driver
 #elif PLATFORM_W600 || PLATFORM_W800
 
 #elif PLATFORM_XR809
@@ -47,6 +50,68 @@ static char SUBMIT_AND_END_FORM[] = "<br><input type=\"submit\" value=\"Submit\"
 #if defined(PLATFORM_BK7231T) || defined(PLATFORM_BK7231N)
 int tuya_os_adapt_wifi_all_ap_scan(AP_IF_S** ap_ary, unsigned int* num);
 int tuya_os_adapt_wifi_release_ap(AP_IF_S* ap);
+#elif PLATFORM_BL602
+/// Read the Internal Temperature Sensor as Float. Returns 0 if successful.
+/// Based on bl_tsen_adc_get in https://github.com/lupyuen/bl_iot_sdk/blob/master/components/hal_drv/bl602_hal/bl_adc.c#L224-L282
+static int get_tsen_adc(
+  float *temp,      //  Pointer to float to store the temperature
+  uint8_t log_flag  //  0 to disable logging, 1 to enable logging
+) {
+  static uint16_t tsen_offset = 0xFFFF;
+  float val = 0.0;
+
+  //  If the offset has not been fetched...
+  if (0xFFFF == tsen_offset) {
+    //  Define the ADC configuration
+    tsen_offset = 0;
+    ADC_CFG_Type adcCfg = {
+      .v18Sel=ADC_V18_SEL_1P82V,                /*!< ADC 1.8V select */
+      .v11Sel=ADC_V11_SEL_1P1V,                 /*!< ADC 1.1V select */
+      .clkDiv=ADC_CLK_DIV_32,                   /*!< Clock divider */
+      .gain1=ADC_PGA_GAIN_1,                    /*!< PGA gain 1 */
+      .gain2=ADC_PGA_GAIN_1,                    /*!< PGA gain 2 */
+      .chopMode=ADC_CHOP_MOD_AZ_PGA_ON,         /*!< ADC chop mode select */
+      .biasSel=ADC_BIAS_SEL_MAIN_BANDGAP,       /*!< ADC current form main bandgap or aon bandgap */
+      .vcm=ADC_PGA_VCM_1V,                      /*!< ADC VCM value */
+      .vref=ADC_VREF_2V,                        /*!< ADC voltage reference */
+      .inputMode=ADC_INPUT_SINGLE_END,          /*!< ADC input signal type */
+      .resWidth=ADC_DATA_WIDTH_16_WITH_256_AVERAGE,  /*!< ADC resolution and oversample rate */
+      .offsetCalibEn=0,                         /*!< Offset calibration enable */
+      .offsetCalibVal=0,                        /*!< Offset calibration value */
+    };
+    ADC_FIFO_Cfg_Type adcFifoCfg = {
+      .fifoThreshold = ADC_FIFO_THRESHOLD_1,
+      .dmaEn = DISABLE,
+    };
+
+    //  Enable and reset the ADC
+    GLB_Set_ADC_CLK(ENABLE,GLB_ADC_CLK_96M, 7);
+    ADC_Disable();
+    ADC_Enable();
+    ADC_Reset();
+
+    //  Configure the ADC and Internal Temperature Sensor
+    ADC_Init(&adcCfg);
+    ADC_Channel_Config(ADC_CHAN_TSEN_P, ADC_CHAN_GND, 0);
+    ADC_Tsen_Init(ADC_TSEN_MOD_INTERNAL_DIODE);
+    ADC_FIFO_Cfg(&adcFifoCfg);
+
+    //  Fetch the offset
+    BL_Err_Type rc = ADC_Trim_TSEN(&tsen_offset);
+
+    //  Must wait 100 milliseconds or returned temperature will be negative
+    rtos_delay_milliseconds(100);
+  }
+  //  Read the temperature based on the offset
+  val = TSEN_Get_Temp(tsen_offset);
+  if (log_flag) {
+    printf("offset = %d\r\n", tsen_offset);
+    printf("temperature = %f Celsius\r\n", val);
+  }
+  //  Return the temperature
+  *temp = val;
+  return 0;
+}
 #endif
 
 unsigned char hexdigit(char hex) {
@@ -751,22 +816,29 @@ int http_fn_index(http_request_t* request) {
 	hprintf255(request, "<h5>Cfg size: %i, change counter: %i, ota counter: %i, boot incompletes %i (might change to 0 if you wait to 30 sec)!</h5>",
 		sizeof(g_cfg), g_cfg.changeCounter, g_cfg.otaCounter, g_bootFailures);
 
-#if PLATFORM_BEKEN
-	if(!bSafeMode && g_bootFailures <= 1) // only in Normal mode, and if boot is not failing
+  // display temperature - thanks to giedriuslt
+  // only in Normal mode, and if boot is not failing
+	if(!bSafeMode && g_bootFailures <= 1) 
 	{
+#if PLATFORM_BEKEN
 		UINT32 temperature;
 		temp_single_get_current_temperature(&temperature);
 		hprintf255(request, "<h5>Internal temperature: %.1f°C</h5>",
 			temperature/10.0f);
-	}
+#elif PLATFORM_BL602
+	float wifi_temperature;
+	get_tsen_adc(&wifi_temperature, 0);
+	hprintf255(request, "<h5>Internal Temperature: %.1f°C</h5>",
+		wifi_temperature);
 #elif PLATFORM_LN882H
 	// Quick hack to display LN-only temperature,
 	// we may improve it in the future
 	extern float g_wifi_temperature;
 
-	hprintf255(request, "<h5>Internal temperature: %f°C</h5>",
+	hprintf255(request, "<h5>Internal temperature: %.1f°C</h5>",
 		g_wifi_temperature);
 #endif
+	}
 
 	inputName = CFG_GetPingHost();
 	if (inputName && *inputName && CFG_GetPingDisconnectedSecondsToRestart()) {