From 785f8a6806113fd5a1b1e2d03db7f4b4a9ffe6ca Mon Sep 17 00:00:00 2001
From: Vasily Davydov <vasilydavydovmail@yahoo.com>
Date: Tue, 4 Apr 2023 22:19:24 +0300
Subject: [PATCH] peripherals: add EEPROM lib [#2]

---
 source/shoh/src/peripherals/EEPROMWrapper.cpp | 95 +++++++++++++++++++
 source/shoh/src/peripherals/EEPROMWrapper.h   | 83 ++++++++++++++++
 2 files changed, 178 insertions(+)
 create mode 100644 source/shoh/src/peripherals/EEPROMWrapper.cpp
 create mode 100644 source/shoh/src/peripherals/EEPROMWrapper.h

diff --git a/source/shoh/src/peripherals/EEPROMWrapper.cpp b/source/shoh/src/peripherals/EEPROMWrapper.cpp
new file mode 100644
index 0000000..4f9f160
--- /dev/null
+++ b/source/shoh/src/peripherals/EEPROMWrapper.cpp
@@ -0,0 +1,95 @@
+/*
+ * EEPROMWrapper.cpp
+ *
+ *  Created on: Dec 4, 2022
+ *      Author: tylen
+ */
+
+#include <EEPROMWrapper.h>
+
+EEPROM_Wrapper::EEPROM_Wrapper ()
+{
+  /* Enable EEPROM clock and reset EEPROM controller */
+  Chip_Clock_EnablePeriphClock (SYSCTL_CLOCK_EEPROM);
+  Chip_SYSCTL_PeriphReset (RESET_EEPROM);
+  iap_exec = reinterpret_cast<IAP_call> (IAP_ENTRY_LOCATION);
+}
+
+EEPROM_Wrapper::~EEPROM_Wrapper ()
+{
+  // TODO Auto-generated destructor stub
+}
+
+static void
+e_memcpy (void *from, void *to, unsigned int n)
+{
+  if (!from)
+    return;
+  char *source = (char *)from;
+  char *dest = (char *)to;
+  while (n)
+    {
+      (*dest++) = (*source++);
+      n--;
+    }
+}
+
+void
+EEPROM_Wrapper::eeprom_execute (EEPROM *rom)
+{
+  command[0] = rom->mode;
+  command[1] = rom->addr;
+  command[2] = rom->data;
+  command[3] = rom->size;
+  command[4] = rom->clock;
+  this->iap_exec (command, result);
+}
+
+void
+EEPROM_Wrapper::eeprom_use (uint8_t *data, uint32_t addr, uint32_t size,
+                            bool mode)
+{
+  rom.addr = addr;
+  rom.data = (uint32_t)data;
+  rom.mode = (mode) ? IAP_EEPROM_READ : IAP_EEPROM_WRITE;
+  rom.size = size;
+#if INCLUDE_vTaskSuspend
+  vTaskSuspendAll ();
+#endif
+  /* Main execution of eeprom r/w */
+  eeprom_execute (&rom);
+#if INCLUDE_vTaskSuspend
+  xTaskResumeAll ();
+#endif
+  assert (result[0] == IAP_CMD_SUCCESS);
+}
+
+std::string
+EEPROM_Wrapper::str_read_from (uint32_t addr, uint32_t amount)
+{
+  eeprom_use (buffer, addr, amount, READ);
+  std::string str = (char *)buffer;
+  return str;
+}
+
+void
+EEPROM_Wrapper::write_to (uint32_t addr, std::string str)
+{
+  std::copy (str.begin (), str.end (), std::begin (buffer));
+  eeprom_use (buffer, addr, str.length (), WRITE);
+}
+
+void *
+EEPROM_Wrapper::read_from (uint32_t addr, uint32_t amount)
+{
+  eeprom_use (buffer, addr, amount, READ);
+  void *data = (void *)buffer;
+  return data;
+}
+void
+EEPROM_Wrapper::write_to (uint32_t addr, void *data, uint32_t size_of_data)
+{
+  assert (size_of_data < EEPROM_MAX_BUFER_SIZE);
+  e_memcpy (data, buffer, size_of_data);
+  eeprom_use (buffer, addr, size_of_data, WRITE);
+}
diff --git a/source/shoh/src/peripherals/EEPROMWrapper.h b/source/shoh/src/peripherals/EEPROMWrapper.h
new file mode 100644
index 0000000..b0aed9b
--- /dev/null
+++ b/source/shoh/src/peripherals/EEPROMWrapper.h
@@ -0,0 +1,83 @@
+/*
+ * EEPROMWrapper.h
+ *
+ *  Created on: Dec 4, 2022
+ *      Author: tylen
+ */
+
+#ifndef EEPROMWRAPPER_H_
+#define EEPROMWRAPPER_H_
+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "chip.h"
+#include <assert.h>
+#include <string>
+
+
+typedef void (*IAP_call) (uint32_t[], uint32_t[]);
+
+typedef struct _eeprom
+{
+  uint32_t data;
+  uint32_t addr;
+  uint32_t size;
+  uint32_t mode;
+  uint32_t clock;
+} EEPROM;
+
+#define READ true
+#define WRITE false
+#define EEPROM_MAX_BUFER_SIZE 1000
+
+class EEPROM_Wrapper
+{
+public:
+  /**
+   * @brief Construct a new eeprom wrapper object
+   *
+   */
+  EEPROM_Wrapper ();
+  virtual ~EEPROM_Wrapper ();
+  /**
+   * @brief Read a string from EEPROM
+   *
+   * @param addr - address to read from
+   * @param amount - amount of bytes to read
+   * @return std::string - that was read
+   */
+  std::string str_read_from (uint32_t addr, uint32_t amount);
+  /**
+   * @brief Write a string to EEPROM
+   *
+   * @param addr - address to write on
+   * @param str - string to write
+   */
+  void write_to (uint32_t addr, std::string str);
+  /**
+   * @brief Read data from EEPROM
+   *
+   * @param addr - address to read from
+   * @param amount - amount of bytes to read
+   * @return void* - data that was read
+   */
+  void *read_from (uint32_t addr, uint32_t amount);
+  /**
+   * @brief Write data to EEPROM
+   *
+   * @param addr - address to write on
+   * @param data - data to be written
+   * @param size_of_data - size of data to be written
+   */
+  void write_to (uint32_t addr, void *data, uint32_t size_of_data);
+
+private:
+  IAP_call iap_exec;
+  uint32_t command[5], result[5];
+  EEPROM rom = { 0, 0, 0, 0, 72000 };
+  void eeprom_execute (EEPROM *rom);
+  void eeprom_use (uint8_t *data, uint32_t addr, uint32_t size, bool mode);
+  uint8_t buffer[EEPROM_MAX_BUFER_SIZE] = { 0 };
+};
+
+#endif /* EEPROMWRAPPER_H_ */