72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
#include <main.h>
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#include <spi.h>
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#include <eeprom.h>
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// #include <stm32f1xx_hal.h>
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#include <string.h>
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#define HIGH GPIO_PIN_SET
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#define LOW GPIO_PIN_RESET
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const uint8_t EEPROM_READ = 0x03;
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const uint8_t EEPROM_WRITE = 0x02;
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const uint8_t EEPROM_WRDI = 0x04;
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const uint8_t EEPROM_WREN = 0x06;
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const uint8_t EEPROM_RDSR = 0x05;
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const uint8_t EEPROM_WRSR = 0x01;
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const uint32_t STORAGE_MAGIC = 0xaffe000b;
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typedef union {
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struct {
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uint8_t cmd;
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uint16_t addr;
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uint8_t data[32];
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} s;
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uint8_t b[35];
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} t_spiMsg;
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inline static void __EEPROM_CS(GPIO_PinState v) {
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HAL_GPIO_WritePin(EEPROM_CS_GPIO_Port, EEPROM_CS_Pin, v);
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}
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void eepromWrite(uint16_t addr, uint8_t *buf, uint8_t len) {
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t_spiMsg msg = {
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.s.cmd = EEPROM_WRITE,
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.s.addr = addr
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};
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memcpy(msg.s.data, buf, len);
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uint8_t writeEnable = EEPROM_WREN;
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__EEPROM_CS(LOW);
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HAL_SPI_Transmit(&eepromSpi, &writeEnable, 1, HAL_MAX_DELAY);
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__EEPROM_CS(HIGH);
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__EEPROM_CS(LOW);
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HAL_SPI_Transmit(&eepromSpi, msg.b, ((uint16_t)(len+3+1)), HAL_MAX_DELAY);
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__EEPROM_CS(HIGH);
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}
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void eepromRead(uint16_t addr, uint8_t *buf, uint8_t len) {
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t_spiMsg txMsg = {
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.s.cmd = EEPROM_READ,
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.s.addr = addr
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};
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t_spiMsg rxMsg;
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__EEPROM_CS(LOW);
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HAL_SPI_TransmitReceive(&eepromSpi, txMsg.b, rxMsg.b, ((uint16_t)(len+3+1)), HAL_MAX_DELAY);
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__EEPROM_CS(HIGH);
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memcpy(buf, rxMsg.s.data, len);
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}
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