PMBus: add the READ_TEMPERATURE_n cmds, temp sensor -> ADC -> tmp1

main_fw/build/Makefile

@@ -72,6 +72,7 @@ hal/src/hal_atomic.o \
 hpl/adc/hpl_adc.o \
 ../../common/src/checksums.o \
 ../../common/src/flash_utils.o \
+../../common/src/float_utils.o \
 ../../common/src/i2c_slave.o \
 ../src/i2c_impl.o
 

main_fw/src/i2c_impl.c

@@ -18,6 +18,10 @@ void query_prp();
 void query_cln();
 uint8_t query_r;
 
+extern uint16_t temp1;
+extern uint16_t temp2;
+extern uint16_t temp3;
+
 extern uint32_t secondary_fw_start;
 
 #define N_CMDS 12
@@ -25,6 +29,9 @@ extern uint32_t secondary_fw_start;
 static cmd_space_t cmds = {
         N_CMDS,
         (cmd_t[]){{0x1A, -1,                       (uint8_t *)&query_r, &query_prp, &query_cln},
+                  {0x8D,  2,                       (uint8_t *)&temp1,   (fp_t)NULL, (fp_t)NULL},
+                  {0x8E,  2,                       (uint8_t *)&temp2,   (fp_t)NULL, (fp_t)NULL},
+                  {0x8F,  2,                       (uint8_t *)&temp3,   (fp_t)NULL, (fp_t)NULL},
                   {0x99, -(int8_t)sizeof(MFR_ID),  (uint8_t *)&MFR_ID,  (fp_t)NULL, (fp_t)NULL},
                   {0x9A, -(int8_t)sizeof(MFR_MDL), (uint8_t *)&MFR_MDL, (fp_t)NULL, (fp_t)NULL},
                   {0x9B, -(int8_t)sizeof(MFR_REV), (uint8_t *)&MFR_REV, (fp_t)NULL, (fp_t)NULL},

main_fw/src/main.c

@@ -3,10 +3,15 @@
 #include "usb_debug.h"
 #include "checksums.h"
 #include "flash_utils.h"
+#include "float_utils.h"
 #include "i2c_impl.h"
 
 static uint16_t iter = 0;
 
+uint16_t temp1;
+uint16_t temp2;
+uint16_t temp3;
+
 static void mytimercallback(const struct timer_task *const timer_task)
 {
         uint16_t adc_val;
@@ -15,6 +20,7 @@ static void mytimercallback(const struct timer_task *const timer_task)
         for (int i = 0; i < 9; ++i)
                 adc_sync_read_channel(&ADC_0, 0, (uint8_t *)&adc_val, 2);
         adc_temp = ((adc_val / 4095.0) - 0.6)/0.01;
+        temp1 = float_to_linear(adc_temp);
         debug("slave iter %d, temp=%.1f", iter++, adc_temp);
 
         gpio_toggle_pin_level(LED);