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add eeprom stuff

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This commit is contained in:
Wolfgang Hottgenroth
2017-06-07 20:09:53 +02:00
parent 4739491654
commit 6a7b54dcc1
10 changed files with 123 additions and 24 deletions
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55
my_src/eeprom.c Normal file
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/*
* eeprom.c
*
* Created on: Jun 7, 2017
* Author: wn
*/
#include "eeprom.h"
#include "stm32f1xx_hal.h"
#define HIGH GPIO_PIN_SET
#define LOW GPIO_PIN_RESET
extern SPI_HandleTypeDef hspi1;
const uint8_t EEPROM_READ = 0x03;
const uint8_t EEPROM_WRITE = 0x02;
const uint8_t EEPROM_WRDI = 0x04;
const uint8_t EEPROM_WREN = 0x06;
const uint8_t EEPROM_RDSR = 0x05;
const uint8_t EEPROM_WRSR = 0x01;
static void __EEPROM_CS(GPIO_PinState v) {
HAL_GPIO_WritePin(EEPROM_CS_GPIO_Port, EEPROM_CS_Pin, v);
}
static void __HAL_SPI_Transmit_One_ByValue(SPI_HandleTypeDef *hspi, uint8_t c) {
HAL_SPI_Transmit(hspi, &c, 1, 0);
}
void eepromWrite(uint16_t addr, uint8_t *buf, uint8_t len) {
__EEPROM_CS(LOW);
__HAL_SPI_Transmit_One_ByValue(&hspi1, EEPROM_WREN);
__HAL_SPI_Transmit_One_ByValue(&hspi1, EEPROM_WRITE);
HAL_SPI_Transmit(&hspi1, (uint8_t*)&addr, 2, 0);
HAL_SPI_Transmit(&hspi1, buf, len, 0);
__EEPROM_CS(HIGH);
}
void eepromRead(uint16_t addr, uint8_t *buf, uint8_t len) {
__EEPROM_CS(LOW);
__HAL_SPI_Transmit_One_ByValue(&hspi1, EEPROM_READ);
HAL_SPI_Transmit(&hspi1, (uint8_t*)&addr, 2, 0);
HAL_SPI_Receive(&hspi1, buf, len, 0);
__EEPROM_CS(HIGH);
}