Mitig: make I2C never write to TMRed variables

main_fw/src/i2c_impl.c

@@ -15,10 +15,11 @@ const char MFR_DAT[] = "190801";
 const char MFR_SER[] = "123456789";
 
 void page_chk();
+uint8_t page_tmp;
 uint16_t page __xMR;
 
 extern uint16_t use_pec __xMR;
-uint8_t use_pec_local;
+uint8_t use_pec_tmp;
 void set_pec();
 
 void accvolt();
@@ -93,7 +94,7 @@ static const int8_t cmd_data_lengths[] = {
 static int8_t cmd_data_length_query = -1;
 
 static cmd_t cmds_cmds[] = (cmd_t[]){
-        {0x00, (int8_t *)&cmd_data_lengths[0], (uint8_t *)&page,     (fp_t)NULL, &page_chk,  (fp_t)NULL, QUERY_WR | QUERY_RD | QUERY_FMT_8B, 0},
+        {0x00, (int8_t *)&cmd_data_lengths[0], (uint8_t *)&page_tmp,     (fp_t)NULL, &page_chk,  (fp_t)NULL, QUERY_WR | QUERY_RD | QUERY_FMT_8B, 0},
         {0x1A, (int8_t *)&cmd_data_length_query, (uint8_t *)&query_r,  (fp_t)NULL, &query_prp, (fp_t)NULL, QUERY_SUP, 1},
         {0x8B, (int8_t *)&cmd_data_lengths[2], (uint8_t *)&curpage_volt, &accvolt, (fp_t)NULL, (fp_t)NULL, QUERY_RD | QUERY_FMT_LIN, 0},
         {0x8C, (int8_t *)&cmd_data_lengths[3], (uint8_t *)&curpage_curr, &acccurr, (fp_t)NULL, (fp_t)NULL, QUERY_RD | QUERY_FMT_LIN, 0},
@@ -137,7 +138,7 @@ static cmd_t ext_cmds_cmds[] = (cmd_t[]){
         {0x05, (int8_t *)&ext_cmd_data_lengths[0], (uint8_t *)&dummy_byte, (fp_t)NULL, &boot_new_fw, (fp_t)NULL, 0, 0},
         {0x06, (int8_t *)&ext_cmd_data_lengths[1], (uint8_t *)&dummy_byte, (fp_t)NULL, &uc_reset, (fp_t)NULL, 0, 0},
         {0xA0, (int8_t *)&ext_cmd_data_lengths[2], (uint8_t *)&TMR_ERROR_CNT, (fp_t)NULL, (fp_t)NULL, (fp_t)NULL, 0, 0},
-        {0xB0, (int8_t *)&ext_cmd_data_lengths[3], (uint8_t *)&use_pec_local, (fp_t)NULL, &set_pec, (fp_t)NULL, 0, 1},
+        {0xB0, (int8_t *)&ext_cmd_data_lengths[3], (uint8_t *)&use_pec_tmp, (fp_t)NULL, &set_pec, (fp_t)NULL, 0, 1},
         {0xC0, (int8_t *)&ext_cmd_data_lengths[4], (uint8_t *)&temp_curve_points_data, (fp_t)NULL, &set_tc_curve, (fp_t)NULL, 0, 0},
         {0xC1, (int8_t *)&ext_cmd_data_lengths[5], (uint8_t *)&temp_matrix_row, (fp_t)NULL, &set_tc_matrix, (fp_t)NULL, 0, 0},
         {0xC4, (int8_t *)&ext_cmd_data_lengths[6], (uint8_t *)&tc_on, (fp_t)NULL, &set_tc_onoff, (fp_t)NULL, 0, 0}};
@@ -182,8 +183,10 @@ void boot_new_fw()
 
 void __xMR page_chk()
 {
-        if (page > 2)
+        if (page_tmp > 2)
                 page = 2;
+        else
+                page = page_tmp;
 }
 
 
@@ -241,7 +244,7 @@ void __xMR set_frpms()
 
 void __xMR set_pec()
 {
-        use_pec = use_pec_local;
+        use_pec = use_pec_tmp;
 }