feat: eeprom drivers

bms/App/api/eeprom/CMakeLists.txt

@@ -3,5 +3,5 @@ add_library(eeprom STATIC)
 
 file(GLOB SRC_FILES "*.c")
 target_sources(eeprom PRIVATE ${SRC_FILES})
-
-target_include_directories(eeprom PUBLIC .)
+target_link_libraries(eeprom PUBLIC stm32_hal)
+target_include_directories(eeprom PUBLIC .)

bms/App/api/eeprom/eeprom.c

@@ -0,0 +1,135 @@
+#include "eeprom.h"
+
+#define EEPROM_ADDRESS 0x50
+
+void setWriteProtect(int enable) {
+    if (enable) {
+        HAL_GPIO_WritePin(WriteProtect_EEPROM_GPIO_Port, WriteProtect_EEPROM_Pin, GPIO_PIN_SET);
+    } else {
+        HAL_GPIO_WritePin(WriteProtect_EEPROM_GPIO_Port, WriteProtect_EEPROM_Pin, GPIO_PIN_RESET);
+    }
+}
+
+int eeprom_init()
+{
+    setWriteProtect(1);
+    return 0;
+}
+
+int eeprom_ready()
+{
+    HAL_StatusTypeDef status = HAL_I2C_IsDeviceReady(&hi2c1, (EEPROM_ADDRESS << 1), 3, 1);
+
+    if (status == HAL_OK)
+    {
+        return 1;
+    }
+    else if (status == HAL_BUSY || status == HAL_TIMEOUT)
+    {
+        return 0;
+    }
+
+    return -1;
+}
+
+int eeprom_wait_until_ready(uint32_t timeout_ms)
+{
+    uint32_t tickstart = HAL_GetTick();
+    while ((HAL_GetTick() - tickstart) < timeout_ms)
+    {
+        int ready = eeprom_ready();
+        if (ready == 1) return 0;
+        else if (ready == -1) return -1;
+        HAL_Delay(5);
+    }
+    return -1;
+}
+
+int eeprom_write(uint16_t address, uint8_t *data, size_t size)
+{
+    if (size > 128)
+        return -1;
+
+    setWriteProtect(0);    
+
+    HAL_StatusTypeDef status = HAL_I2C_Mem_Write(
+        &hi2c1,
+        (EEPROM_ADDRESS << 1),
+        address,
+        I2C_MEMADD_SIZE_16BIT,
+        data,
+        size,
+        10);
+
+    setWriteProtect(1);
+
+    if (status != HAL_OK)
+        return -1;
+
+    return 0;
+}
+
+int eeprom_write_dma(uint16_t address, uint8_t *data, size_t size) {
+    if (hi2c1.State != HAL_I2C_STATE_READY) return -1;
+
+    setWriteProtect(0);
+
+    HAL_StatusTypeDef status = HAL_I2C_Mem_Write_DMA(
+        &hi2c1,
+        (EEPROM_ADDRESS << 1),
+        address,
+        I2C_MEMADD_SIZE_16BIT,
+        data,
+        size
+    );
+
+    if (status != HAL_OK) {
+        setWriteProtect(1);
+        return -1;
+    }
+
+    return 0;
+}
+
+void eeprom_TxCpltCallback() {
+    setWriteProtect(1);
+}
+
+int eeprom_read(uint16_t address, uint8_t *buffer, size_t size)
+{
+    if (buffer == NULL || size == 0)
+        return -1;
+
+    HAL_StatusTypeDef status = HAL_I2C_Mem_Read(
+        &hi2c1,
+        (EEPROM_ADDRESS << 1),
+        address,
+        I2C_MEMADD_SIZE_16BIT,
+        buffer,
+        size,
+        10);
+
+    if (status != HAL_OK)
+        return -1;
+
+    return 0;
+}
+
+int eeprom_read_dma(uint16_t address, uint8_t *buffer, size_t size) {
+    if (hi2c1.State != HAL_I2C_STATE_READY) return -1;
+
+    HAL_StatusTypeDef status = HAL_I2C_Mem_Read_DMA(
+        &hi2c1,
+        (EEPROM_ADDRESS << 1),
+        address,
+        I2C_MEMADD_SIZE_16BIT,
+        buffer,
+        size
+    );
+
+    if (status != HAL_OK) {
+        return -1;
+    }
+
+    return 0;
+}

bms/App/api/eeprom/eeprom.h

@@ -0,0 +1,18 @@
+#pragma once
+#include "stm32g4xx_hal.h"
+#include "main.h"
+
+extern I2C_HandleTypeDef hi2c1;
+
+int eeprom_init();
+
+int eeprom_ready();
+int eeprom_wait_until_ready(uint32_t timeout_ms);
+
+int eeprom_write(uint16_t address, uint8_t* data, size_t size);
+int eeprom_read(uint16_t address, uint8_t* buffer, size_t size);
+
+int eeprom_write_dma(uint16_t address, uint8_t* data, size_t size);
+int eeprom_read_dma(uint16_t address, uint8_t* buffer, size_t size);
+
+void eeprom_TxCpltCallback();

bms/CMakeLists.txt

@@ -100,6 +100,7 @@ target_link_libraries(${PROJECT_NAME}
         adbms  
         segment
         charger
+        eeprom
         program    
         daemons    
         threads

bms/Core/Inc/main.h

@@ -76,6 +76,8 @@ void Error_Handler(void);
 #define T_SWDIO_GPIO_Port GPIOA
 #define T_SWCLK_Pin GPIO_PIN_14
 #define T_SWCLK_GPIO_Port GPIOA
+#define WriteProtect_EEPROM_Pin GPIO_PIN_11
+#define WriteProtect_EEPROM_GPIO_Port GPIOC
 
 /* USER CODE BEGIN Private defines */
 

bms/Core/Inc/stm32g4xx_it.h

@@ -54,6 +54,8 @@ void UsageFault_Handler(void);
 void DebugMon_Handler(void);
 void DMA1_Channel1_IRQHandler(void);
 void DMA1_Channel2_IRQHandler(void);
+void DMA1_Channel3_IRQHandler(void);
+void DMA1_Channel4_IRQHandler(void);
 void FDCAN1_IT0_IRQHandler(void);
 void EXTI15_10_IRQHandler(void);
 void TIM5_IRQHandler(void);