155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
#include "m95128.h"
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uint8_t read_value;
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uint8_t old_last_page;
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uint8_t new_last_page;
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void spi_eeprom_select(bool state)
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{
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SET_PIN_OUT(DDRB, DDB0);
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if (!state) {
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SET_PIN_HIGH(PORTB, PB0);
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} else {
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SET_PIN_LOW(PORTB, PB0);
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}
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}
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void eeprom_write(uint8_t page, unsigned const char* msg, uint8_t msg_len)
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{
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spi_rfm69_select(false);
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spi_eeprom_select(true);
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spi_write(EEPROM_WREN);
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spi_eeprom_select(false);
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spi_eeprom_select(true);
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spi_write(EEPROM_WRITE);
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write_page_address(page);
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for (int i = 0; i < msg_len; i++) {
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spi_write(msg[i]);
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}
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spi_eeprom_select(false);
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spi_eeprom_select(true);
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spi_write(EEPROM_WRDI);
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spi_eeprom_select(false);
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while (1) {
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spi_eeprom_select(true);
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spi_write(EEPROM_RDSR);
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read_value = spi_read();
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spi_eeprom_select(false);
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if (read_value == 0x00) {
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return;
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}
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};
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}
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void eeprom_read(uint8_t page, unsigned char* msg, uint8_t msg_len)
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{
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spi_eeprom_select(true);
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spi_write(EEPROM_WRDI);
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spi_eeprom_select(false);
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spi_eeprom_select(true);
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spi_write(EEPROM_READ);
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write_page_address(page);
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for (int i = 0; i < msg_len; i++) {
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msg[i] = spi_read();
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}
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spi_eeprom_select(false);
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}
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void delete_last_page()
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{
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old_last_page = get_last_page();
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if (old_last_page == 0) // If we have nothing, no need to delete anything
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{
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return;
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}
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new_last_page = old_last_page - 1;
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write_last_page_value(new_last_page);
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eeprom_clear_page(old_last_page);
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}
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uint8_t get_last_page()
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{
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memset(DATA_BUFFER_65, 0, 1);
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eeprom_read(0, DATA_BUFFER_65, 1);
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return (uint8_t)DATA_BUFFER_65[0];
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}
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void write_last_page_value(uint8_t page)
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{
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DATA_BUFFER_7[0] = page;
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eeprom_write(0, DATA_BUFFER_7, 1);
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}
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void write_page_address(uint8_t page)
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{
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uint16_t addr = page * 0x40; // Each page starts at 64 byte intervals. And 64 byte is 0x40 or
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// 0b01000000;
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spi_write((addr >> 8) & 0xFF);
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spi_write(addr & 0xFF);
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}
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void eeprom_write_tx_data(uint8_t page, tx_rx_data_struct tx_data_in)
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{
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if (page == 0) {
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return;
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}
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memset(DATA_BUFFER_65, ' ', 64);
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DATA_BUFFER_65[64] = '\0';
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memcpy(DATA_BUFFER_65, tx_data_in.msg, 60);
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DATA_BUFFER_65[60] = tx_data_in.flags;
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DATA_BUFFER_65[61] = tx_data_in.from;
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DATA_BUFFER_65[62] = tx_data_in.to;
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DATA_BUFFER_65[63] = tx_data_in.dtype;
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eeprom_write(page, DATA_BUFFER_65, 64);
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}
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tx_rx_data_struct eeprom_read_tx_data(uint8_t page)
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{
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reset_txrx_struct(&TX_DATA);
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memset(DATA_BUFFER_65, ' ', 64);
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DATA_BUFFER_65[64] = '\0';
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eeprom_read(page, DATA_BUFFER_65, 64);
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memcpy(TX_DATA.msg, DATA_BUFFER_65, 60);
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TX_DATA.flags = DATA_BUFFER_65[60];
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TX_DATA.from = DATA_BUFFER_65[61];
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TX_DATA.to = DATA_BUFFER_65[62];
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TX_DATA.dtype = DATA_BUFFER_65[63];
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TX_DATA.len = 60;
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return TX_DATA;
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}
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tx_rx_data_struct read_struct_last_page()
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{
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uint8_t page_num = get_last_page();
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return eeprom_read_tx_data(page_num);
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}
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void write_struct_to_last_page(tx_rx_data_struct tx_data_in)
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{
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uint8_t page_val = get_last_page();
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uint8_t next_page_val;
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if (page_val == 255) {
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next_page_val = 1;
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} else {
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next_page_val = page_val + 1;
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}
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eeprom_write_tx_data(next_page_val, tx_data_in);
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write_last_page_value(next_page_val);
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}
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void eeprom_clear_page(uint8_t page)
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{
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memset(DATA_BUFFER_65, ' ', 64);
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eeprom_write(page, DATA_BUFFER_65, 64);
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}
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