mirror of
https://github.com/EranMorkon/AMTS.git
synced 2023-12-28 16:48:38 +00:00
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
#include "eeprom.h"
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volatile uint32_t *EEPROMSTick, EEPROMSTickCur;
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uint8_t load_byte(uint16_t eeprom_addr)
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{
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uint8_t data;
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I2C_GenerateSTART(I2C1, ENABLE);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
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I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Transmitter);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
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I2C_SendData(I2C1, (eeprom_addr & 0xFF00) >> 8);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
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I2C_SendData(I2C1, (eeprom_addr & 0x00FF));
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
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I2C_GenerateSTART(I2C1, ENABLE);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
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I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Receiver);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
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data = I2C_ReceiveData(I2C1);
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I2C_GenerateSTOP(I2C1, ENABLE);
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return data;
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}
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void write_byte(uint16_t eeprom_addr, uint8_t data)
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{
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I2C_GenerateSTART(I2C1, ENABLE);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
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I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Transmitter);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
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I2C_SendData(I2C1, (eeprom_addr & 0xFF00) >> 8);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
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I2C_SendData(I2C1, (eeprom_addr & 0x00FF));
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
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I2C_SendData(I2C1, data);
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while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
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I2C_GenerateSTOP(I2C1, ENABLE);
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EEPROMSTickCur = *EEPROMSTick;
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while((*EEPROMSTick - EEPROMSTickCur) <= 50); // 5ms write cycle, see datasheet param 17
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return;
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}
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void init_eeprom(volatile uint32_t *SysTickCnt)
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{
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
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GPIO_InitTypeDef gpio;
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GPIO_StructInit(&gpio);
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// SCL
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gpio.GPIO_Mode = GPIO_Mode_AF_PP;
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gpio.GPIO_Pin = GPIO_Pin_6;
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GPIO_Init(GPIOB, &gpio);
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// SDA
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gpio.GPIO_Mode = GPIO_Mode_AF_OD;
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gpio.GPIO_Pin = GPIO_Pin_7;
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GPIO_Init(GPIOB, &gpio);
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I2C_InitTypeDef i2c;
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I2C_StructInit(&i2c);
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i2c.I2C_ClockSpeed = 400000;
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I2C_Init(I2C1, &i2c);
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I2C_Cmd(I2C1, ENABLE);
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EEPROMSTick = SysTickCnt;
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return;
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}
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void run_eeprom(uint8_t *success)
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{
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uint8_t set, read;
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*success = 0;
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set = 0xAA;
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write_byte(0x0000, set);
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read = load_byte(0x0000);
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if (set != read) return;
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set = 0xBA;
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write_byte(0x0010, set);
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read = load_byte(0x0010);
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if (set != read) return;
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set = 0xAD;
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write_byte(0x0001, set);
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read = load_byte(0x0001);
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if (set != read) return;
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set = 0x00;
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write_byte(0x0000, set);
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read = load_byte(0x0000);
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if (set != read) return;
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set = 0x88;
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write_byte(0x0002, set);
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read = load_byte(0x0002);
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if (set != read) return;
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set = 0x01;
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write_byte(0x0000, set);
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read = load_byte(0x0000);
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if (set != read) return;
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set = 0x55;
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write_byte(0x00005, set);
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read = load_byte(0x0005);
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if (set != read) return;
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set = 0xAA;
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write_byte(0x0005, set);
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read = load_byte(0x0005);
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if (set != read) return;
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*success = 1;
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return;
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}
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void deinit_eeprom(void)
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{
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I2C_Cmd(I2C1, DISABLE);
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I2C_DeInit(I2C1);
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return;
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}
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