eeprom stuff

cube/Makefile

@@ -37,7 +37,7 @@ BUILD_DIR = build
 ######################################
 # C sources
 C_SOURCES =  \
-User/Src/frontend.c User/Src/logger.c User/Src/loopCtrl.c User/Src/main2.c User/Src/mbusComm.c User/Src/ringbuffer.c User/Src/show.c hottislib/PontCoopScheduler.c  \
+User/Src/eeprom.c User/Src/frontend.c User/Src/logger.c User/Src/loopCtrl.c User/Src/main2.c User/Src/mbusComm.c User/Src/ringbuffer.c User/Src/show.c hottislib/PontCoopScheduler.c  \
 libmbus/mbus/mbus-protocol.c \
 Core/Src/main.c \
 Core/Src/gpio.c \

cube/User/Inc/eeprom.h

@@ -0,0 +1,31 @@
+/*
+ * eeprom.h
+ *
+ *  Created on: Jun 7, 2017
+ *      Author: wn
+ */
+
+#ifndef EEPROM_H_
+#define EEPROM_H_
+
+#include "stm32f1xx_hal.h"
+
+
+#define STORAGE_ADDRESS 0x20
+
+
+typedef struct {
+  uint32_t magic;
+  uint32_t savedTemperature;
+  uint32_t savedTime;
+  uint32_t operatingTime;
+} tStorage;
+
+
+void eepromWrite(uint16_t addr, uint8_t *buf, uint8_t len);
+void eepromRead(uint16_t addr, uint8_t *buf, uint8_t len);
+
+void eepromWriteStorage();
+int eepromReadStorage();
+
+#endif /* EEPROM_H_ */

cube/User/Src/eeprom.c

@@ -0,0 +1,127 @@
+/*
+ * eeprom.c
+ *
+ *  Created on: Jun 7, 2017
+ *      Author: wn
+ */
+
+#include "eeprom.h"
+#include "stm32f1xx_hal.h"
+#include <string.h>
+
+#define HIGH GPIO_PIN_SET
+#define LOW GPIO_PIN_RESET
+
+extern SPI_HandleTypeDef hspi1;
+
+
+const uint8_t EEPROM_READ = 0x03;
+const uint8_t EEPROM_WRITE = 0x02;
+const uint8_t EEPROM_WRDI = 0x04;
+const uint8_t EEPROM_WREN = 0x06;
+const uint8_t EEPROM_RDSR = 0x05;
+const uint8_t EEPROM_WRSR = 0x01;
+
+
+const uint32_t STORAGE_MAGIC = 0xaffe000b;
+
+
+
+tStorage storage;
+extern tDisplay display;
+
+
+static void __EEPROM_CS(GPIO_PinState v) {
+  HAL_GPIO_WritePin(EEPROM_CS_GPIO_Port, EEPROM_CS_Pin, v);
+}
+
+
+__attribute__((unused)) static uint8_t eepromReadStatus() {
+  struct {
+    uint8_t rdsr;
+    uint8_t data;
+  } txMsg = {
+      .rdsr = EEPROM_RDSR
+  }, rxMsg;
+
+  __EEPROM_CS(LOW);
+  HAL_SPI_TransmitReceive(&eepromSpi, &txMsg, &rxMsg, 2, HAL_MAX_DELAY);
+  __EEPROM_CS(HIGH);
+
+  return rxMsg.data;
+}
+
+static void eepromWren() {
+  struct {
+    uint8_t wren;
+  } txMsg = {
+      .wren = EEPROM_WREN
+  };
+
+  __EEPROM_CS(LOW);
+  HAL_SPI_Transmit(&eepromSpi, &txMsg, 1, HAL_MAX_DELAY);
+  __EEPROM_CS(HIGH);
+}
+
+__attribute__((unused)) static void eepromWrdi() {
+  struct {
+    uint8_t wrdi;
+  } txMsg = {
+      .wrdi = EEPROM_WRDI
+  };
+
+  __EEPROM_CS(LOW);
+  HAL_SPI_Transmit(&eepromSpi, &txMsg, 1, HAL_MAX_DELAY);
+  __EEPROM_CS(HIGH);
+}
+
+
+void eepromWrite(uint16_t addr, uint8_t *buf, uint8_t len) {
+  struct {
+    uint8_t write;
+    uint16_t addr;
+    uint8_t data[32];
+  } msg = {
+      .write = EEPROM_WRITE,
+      .addr = addr
+  };
+  memcpy(msg.data, buf, len);
+
+  eepromWren();
+
+  __EEPROM_CS(LOW);
+  HAL_SPI_Transmit(&eepromSpi, &msg, ((uint16_t)(len+3+1)), HAL_MAX_DELAY);
+  __EEPROM_CS(HIGH);
+}
+
+void eepromRead(uint16_t addr, uint8_t *buf, uint8_t len) {
+  struct {
+    uint8_t read;
+    uint16_t addr;
+    uint8_t data[32];
+  } txMsg = {
+      .read = EEPROM_READ,
+      .addr = addr
+  },
+    rxMsg;
+
+  __EEPROM_CS(LOW);
+  HAL_SPI_TransmitReceive(&eepromSpi, &txMsg, &rxMsg, ((uint16_t)(len+3+1)), HAL_MAX_DELAY);
+  __EEPROM_CS(HIGH);
+
+  memcpy(buf, rxMsg.data, len);
+}
+
+int eepromReadStorage() {
+  eepromRead(STORAGE_ADDRESS, (uint8_t*) &storage, sizeof(storage));
+  if (storage.magic == STORAGE_MAGIC) {
+    return 0;
+  } else {
+    return -1;
+  }
+}
+
+void eepromWriteStorage() {
+  storage.magic = STORAGE_MAGIC;
+  eepromWrite(STORAGE_ADDRESS, (uint8_t*) &storage, sizeof(storage));
+}