Fix EEPROM in flash emulation; can't fix error in ADC16/ADC17 (temperature and Vdd calculation)

STM32/steppers/adc.c

@@ -23,6 +23,7 @@
 #include "stm32f0.h"
 #include "flash.h"
 #include "adc.h"
+#include "usart.h"
 
 /*
  * 0 - Steppers current
@@ -39,9 +40,11 @@ uint16_t ADC_array[NUMBER_OF_ADC_CHANNELS];
 void adc_setup(){
     // AIN: PA0..3, PA13, PA14. ADC_IN16 - inner temperature. ADC_IN17 - VREFINT
     /* (1) Enable the peripheral clock of the ADC */
-    /* (2) Set peripheral prescaler to /2 so PCLK = HCLK/2 = 24MHz */
+    /* (2) Start HSI14 RC oscillator */
+    /* (3) Wait HSI14 is ready */
     RCC->APB2ENR |= RCC_APB2ENR_ADC1EN; /* (1) */
-    RCC->CFGR |= RCC_CFGR_PPRE_2; /* (2) */
+    RCC->CR2 |= RCC_CR2_HSI14ON; /* (2) */
+    while ((RCC->CR2 & RCC_CR2_HSI14RDY) == 0) /* (3) */
     /* (1) Ensure that ADEN = 0 */
     /* (2) Clear ADEN */
     /* (3) Launch the calibration by setting ADCAL */
@@ -56,12 +59,12 @@ void adc_setup(){
     do{
         ADC1->CR |= ADC_CR_ADEN; /* (1) */
     }while ((ADC1->ISR & ADC_ISR_ADRDY) == 0) /* (2) */;
-    /* (1) Select PCLK/2 by writing 01 in CKMODE */
+    /* (1) Select HSI14 by writing 00 in CKMODE (reset value) */
     /* (2) Select the continuous mode */
     /* (3) Select CHSEL0..3, 13,14, 16,17 */
     /* (4) Select a sampling mode of 111 i.e. 239.5 ADC clk to be greater than 17.1us */
     /* (5) Wake-up the VREFINT and Temperature sensor (only for VBAT, Temp sensor and VRefInt) */
-    ADC1->CFGR2 |= ADC_CFGR2_CKMODE_0; /* (1) */
+    // ADC1->CFGR2 &= ~ADC_CFGR2_CKMODE; /* (1) */
     ADC1->CFGR1 |= ADC_CFGR1_CONT; /* (2)*/
     ADC1->CHSELR = ADC_CHSELR_CHSEL0 | ADC_CHSELR_CHSEL1 | ADC_CHSELR_CHSEL2 |
             ADC_CHSELR_CHSEL3 | ADC_CHSELR_CHSEL13 | ADC_CHSELR_CHSEL14 |
@@ -87,25 +90,47 @@ void adc_setup(){
 }
 
 // return MCU temperature (degrees of celsius)
-uint32_t getTemp(){
-    uint32_t temperature = ADC_array[6];
-    temperature = ((temperature * VDD_APPLI / VDD_CALIB) - (uint32_t) *TEMP30_CAL_ADDR ) ;
-    temperature *= (uint32_t)(110 - 30);
-    temperature /= (uint32_t)(*TEMP110_CAL_ADDR - *TEMP30_CAL_ADDR);
-    temperature += 30;
+int32_t getTemp(){
+    int32_t temperature = (int32_t)ADC_array[6];
+write2trbuf("getTemp()\ncal30=");
+put_uint(*TEMP30_CAL_ADDR);
+write2trbuf(", cal110=");
+put_uint(*TEMP110_CAL_ADDR);
+write2trbuf(", t=");
+put_int(temperature);
+SENDBUF();
+    temperature = ((int32_t) *TEMP30_CAL_ADDR - temperature);
+put_int(temperature);
+SENDBUF();
+    temperature *= (int32_t)(1100 - 300);
+put_int(temperature);
+SENDBUF();
+    temperature = temperature / (int32_t)(*TEMP30_CAL_ADDR - *TEMP110_CAL_ADDR);
+put_int(temperature);
+SENDBUF();
+    temperature += 300;
     return(temperature);
 }
 
 //static uint32_t calval = 0;
 // return Vdd * 10 (V)
 uint32_t getVdd(){
+write2trbuf("getVdd(), val=");
+put_uint(ADC_array[7]);
+write2trbuf(", cal=");
+put_uint(*VREFINT_CAL_ADDR);
+SENDBUF();
   /*  if(!calval){
         calval = ((uint32_t) *VREFINT_CAL_ADDR) * VDD_CALIB;
         calval /= VDD_APPLI;
     } */
-    uint32_t vdd = ADC_array[7] * (uint32_t)33 * the_conf.v33numerator; // 3.3V
+    uint32_t vdd = ((uint32_t) *VREFINT_CAL_ADDR) * (uint32_t)33 * the_conf.v33numerator; // 3.3V
+put_uint(vdd);
+SENDBUF();
     //vdd /= calval * the_conf.v33denominator;
-    vdd /= ((uint32_t) *VREFINT_CAL_ADDR) * the_conf.v33denominator;
+    vdd /= ADC_array[7] * the_conf.v33denominator;
+put_uint(vdd);
+SENDBUF();
     return vdd;
 }
 

STM32/steppers/adc.h

@@ -38,7 +38,7 @@ typedef enum{
     ESW_ERROR
 } ESW_status;
 
-uint32_t getTemp();
+int32_t getTemp();
 uint32_t getVdd();
 uint32_t getVmot();
 uint32_t getImot();

STM32/steppers/flash.c

@@ -28,9 +28,10 @@
 
 // start of configuration data in flash (from 15kB, one kB size)
 #define FLASH_CONF_START_ADDR   ((uint32_t)0x08003C00)
+static const int maxnum = 1024 / sizeof(user_conf);
 
 user_conf the_conf = {
-     .good_data_pos = 0xffffffff
+     .userconf_sz = sizeof(user_conf)
     ,.devID = 0
     ,.v12numerator = 1
     ,.v12denominator = 1
@@ -41,66 +42,81 @@ user_conf the_conf = {
     ,.ESW_thres = 150
 };
 
-static int maxnum = 0x800 / sizeof(user_conf);
-
 static int erase_flash();
 
 static int get_gooddata(){
     user_conf *c = (user_conf*) FLASH_CONF_START_ADDR;
-    uint32_t datapos = c->good_data_pos;
-    if(datapos == 0xffffffff){ // virginity clear
-        return maxnum;
-    }
     // have data - move it to `the_conf`
-    if(maxnum > 32) maxnum = 32;
     int idx;
-    for(idx = 1; idx < maxnum; ++idx){ // find current settings index - first non-zero bit
-        if(datapos & 1<<idx){
-            break;
+//write2trbuf("get_gooddata()\n");
+    for(idx = 0; idx < maxnum; ++idx){ // find current settings index - first good
+        uint16_t sz = c[idx].userconf_sz;
+/*write2trbuf("idx=");
+put_int((int32_t) idx);
+write2trbuf(", sz=");
+put_uint((uint32_t) sz);
+write2trbuf(", devID=");
+put_uint((uint32_t) c[idx].devID);
+write2trbuf(", ESW_thres=");
+put_uint((uint32_t) c[idx].ESW_thres);
+SENDBUF();*/
+        if(sz != sizeof(user_conf)){
+            if(sz == 0xffff) break; // first clear
+            else{
+                return -2; // flash corrupt, need to erase
             }
         }
-    return idx-1;
+    }
+    return idx-1; // -1 if there's no data at all & flash is clear; maxnum-1 if flash is full
 }
 
 void get_userconf(){
     user_conf *c = (user_conf*) FLASH_CONF_START_ADDR;
     int idx = get_gooddata();
-    if(idx == maxnum) return;
+    if(idx < 0) return; // no data stored
     memcpy(&the_conf, &c[idx], sizeof(user_conf));
 }
 
 // store new configuration
 // @return 0 if all OK
 int store_userconf(){
-char buf[2] = {0,0};
     int ret = 0;
     user_conf *c = (user_conf*) FLASH_CONF_START_ADDR;
     int idx = get_gooddata();
-    if(idx == maxnum || idx == maxnum - 1){ // first run or there's no more place
+    if(idx == -2 || idx == maxnum - 1){ // data corruption or there's no more place
         idx = 0;
         if(erase_flash()) return 1;
     }else ++idx; // take next data position
-    if (FLASH->CR & FLASH_CR_LOCK){
+/*write2trbuf("store_userconf()\nidx=");
+put_int((int32_t) idx);
+SENDBUF();*/
+    if (FLASH->CR & FLASH_CR_LOCK){ // unloch flash
         FLASH->KEYR = FLASH_FKEY1;
         FLASH->KEYR = FLASH_FKEY2;
     }
-    the_conf.good_data_pos = 0xffffffff ^ (1<<idx); // write zero to corresponding position
     while (FLASH->SR & FLASH_SR_BSY);
-    FLASH->SR = FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR;
+    if(FLASH->SR & FLASH_SR_WRPERR) return 1; // write protection
+    FLASH->SR = FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR; // clear all flags
     FLASH->CR |= FLASH_CR_PG;
     uint16_t *data = (uint16_t*) &the_conf;
     uint16_t *address = (uint16_t*) &c[idx];
     uint32_t i, count = sizeof(user_conf) / 2;
     for (i = 0; i < count; ++i){
-        //*(volatile uint16_t*)(address + i) = (((uint8_t)data[i + 1]) << 8) | data[i];
         *(volatile uint16_t*)(address + i) = data[i];
-        //while (!(FLASH->SR & FLASH_SR_EOP));
-        while((FLASH->SR & FLASH_SR_BSY));
-buf[0] = '0' + i;
-usart1_send_blocking(buf);
-        if(FLASH->SR &  FLASH_SR_PGERR) ret = 1;
-buf[0] = ret + '0';
-usart1_send_blocking(buf);
+        while (FLASH->SR & FLASH_SR_BSY);
+        if(FLASH->SR &  FLASH_SR_PGERR) ret = 1; // program error - meet not 0xffff
+        else while (!(FLASH->SR & FLASH_SR_EOP));
+/*write2trbuf("write byte ");
+put_int((int32_t) i);
+write2trbuf(", write value=");
+put_uint(data[i]);
+write2trbuf(", read value=");
+put_uint(address[i]);
+SENDBUF();
+if(ret){
+write2trbuf("PGERR");
+SENDBUF();
+}*/
         FLASH->SR = FLASH_SR_EOP | FLASH_SR_PGERR | FLASH_SR_WRPERR;
     }
     FLASH->CR &= ~(FLASH_CR_PG);
@@ -110,6 +126,8 @@ usart1_send_blocking(buf);
 
 static int erase_flash(){
     int ret = 0;
+/*write2trbuf("erase_flash()");
+SENDBUF();*/
     /* (1) Wait till no operation is on going */
     /* (2) Clear error & EOP bits */
     /* (3) Check that the Flash is unlocked */

STM32/steppers/flash.h

@@ -26,7 +26,7 @@
 #define __FLASH_H__
 
 typedef struct{
-    uint32_t good_data_pos; // position of data (index of mostly left zero)
+    uint16_t userconf_sz; // size of data
     uint16_t devID; // device address (id)
     uint16_t ESW_thres; // ADC threshold for end-switches/Hall sensors
     // calibration values for current/voltage sensors

STM32/steppers/proto.c

@@ -27,8 +27,6 @@
 #include "string.h"
 #include "usart.h"
 
-#define SENDBUF() do{usart1_send_blocking(gettrbuf()); cleartrbuf();}while(0)
-
 static const char *eodata = "DATAEND";
 static const char *badcmd = "BADCMD";
 static const char *allok = "ALL OK";
@@ -158,6 +156,7 @@ typedef struct{
 } user_conf_descr;
 
 static const user_conf_descr descrarr[] = {
+    {"CONFSZ", &the_conf.userconf_sz},
     {"DEVID",  &the_conf.devID},
     {"V12NUM", &the_conf.v12numerator},
     {"V12DEN", &the_conf.v12denominator},
@@ -171,9 +170,6 @@ static const user_conf_descr descrarr[] = {
 
 static char *get_conf(){
     const user_conf_descr *curdesc = descrarr;
-    write2trbuf("DATAPOS=");
-    put_uint(the_conf.good_data_pos);
-    SENDBUF();
     do{
         write2trbuf(curdesc->fieldname);
         put2trbuf('=');
@@ -274,9 +270,9 @@ static char *setESWthres(char *str){
 }
 
 static char *get_temper(){
-    uint32_t t = getTemp();
+    int32_t t = getTemp();
     write2trbuf("TEMP=");
-    put_uint(t);
+    put_int(t);
     SENDBUF();
     return NULL;
 }

STM32/steppers/usart.h

@@ -47,6 +47,7 @@ void USART1_config();
 int usart1_getline(char **line);
 TXstatus usart1_send(char *str);
 #define usart1_send_blocking(str) do{}while(LINE_BUSY == usart1_send(str))
+#define SENDBUF() do{usart1_send_blocking(gettrbuf()); cleartrbuf();}while(0)
 
 #define cleartrbuf()  do{trbufidx = 0;}while(0)
 #define trbufisfull()  (trbufidx)