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This commit is contained in:
Andreas Mieke 2018-03-18 23:43:59 +01:00
parent 4093cd295f
commit dc99dcf6e8
41 changed files with 1775 additions and 19 deletions
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123
Mieke/SW/MT/eeprom.c Normal file
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#include "eeprom.h"
volatile uint32_t *EEPROMSTick, EEPROMSTickCur;
uint8_t load_byte(uint16_t eeprom_addr)
{
uint8_t data;
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, (eeprom_addr & 0xFF00) >> 8);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, (eeprom_addr & 0x00FF));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
data = I2C_ReceiveData(I2C1);
I2C_GenerateSTOP(I2C1, ENABLE);
return data;
}
void write_byte(uint16_t eeprom_addr, uint8_t data)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, (eeprom_addr & 0xFF00) >> 8);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, (eeprom_addr & 0x00FF));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, data);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
EEPROMSTickCur = *EEPROMSTick;
while((*EEPROMSTick - EEPROMSTickCur) <= 50); // 5ms write cycle, see datasheet param 17
return;
}
void init_eeprom(volatile uint32_t *SysTickCnt)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
GPIO_InitTypeDef gpio;
GPIO_StructInit(&gpio);
// SCL
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
gpio.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOB, &gpio);
// SDA
gpio.GPIO_Mode = GPIO_Mode_AF_OD;
gpio.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOB, &gpio);
I2C_InitTypeDef i2c;
I2C_StructInit(&i2c);
i2c.I2C_ClockSpeed = 400000;
I2C_Init(I2C1, &i2c);
I2C_Cmd(I2C1, ENABLE);
EEPROMSTick = SysTickCnt;
return;
}
void run_eeprom(uint8_t *success)
{
uint8_t set, read;
*success = 0;
set = 0xAA;
write_byte(0x0000, set);
read = load_byte(0x0000);
if (set != read) return;
set = 0xBA;
write_byte(0x0010, set);
read = load_byte(0x0010);
if (set != read) return;
set = 0xAD;
write_byte(0x0001, set);
read = load_byte(0x0001);
if (set != read) return;
set = 0x00;
write_byte(0x0000, set);
read = load_byte(0x0000);
if (set != read) return;
set = 0x88;
write_byte(0x0002, set);
read = load_byte(0x0002);
if (set != read) return;
set = 0x01;
write_byte(0x0000, set);
read = load_byte(0x0000);
if (set != read) return;
set = 0x55;
write_byte(0x00005, set);
read = load_byte(0x0005);
if (set != read) return;
set = 0xAA;
write_byte(0x0005, set);
read = load_byte(0x0005);
if (set != read) return;
*success = 1;
return;
}
void deinit_eeprom(void)
{
I2C_Cmd(I2C1, DISABLE);
I2C_DeInit(I2C1);
return;
}