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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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72
Mieke/SW/ODD/eeprom.c Normal file
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#include "eeprom.h"
extern volatile uint32_t SysTickCnt;
#define EEPROM_ADDR (uint8_t)0xA0 // 0b10100000
// ---- Vendor address part
// --- User address part
// - Keep free for R/W bit (set by I2C_Send7bitAddress())
uint32_t last_write_tick = 0;
void eeprom_init(void)
{
i2c1_init();
}
void eeprom_read(uint16_t address, uint8_t *data, uint16_t length)
{
uint16_t cur_pos;
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, (address & 0xFF00) >> 8);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, (address & 0x00FF));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C1, ENABLE);
I2C_AcknowledgeConfig(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));
for(cur_pos = 0; cur_pos < length; cur_pos++) {
if(cur_pos == length - 1) {
I2C_AcknowledgeConfig(I2C1, DISABLE);
}
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
data[cur_pos] = I2C_ReceiveData(I2C1);
}
I2C_GenerateSTOP(I2C1, ENABLE);
}
void eeprom_write(uint16_t address, uint8_t *data, uint16_t length)
{
uint8_t cur_page = 0;
uint16_t cur_pos = 0;
address = address & 0xFFA0;
for(cur_page = 0; cur_page <= ((length-1)/64); cur_page++) {
while((SysTickCnt - last_write_tick) <= 5);
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, (address & 0xFF00) >> 8);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, (address & 0x00FF));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
for(; (cur_pos < length) && (cur_pos%64 <= 63); cur_pos++) {
I2C_SendData(I2C1, data[cur_pos]);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
I2C_GenerateSTOP(I2C1, ENABLE);
address += 0x0040;
last_write_tick = SysTickCnt;
}
}