You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.2 KiB
53 lines
1.2 KiB
1 year ago
|
/**
|
||
|
|
* TODO file description
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <pico/stdlib.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <hardware/i2c.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include "ee.h"
|
||
|
|
#include "pinout.h"
|
||
|
|
#include "rv_try.h"
|
||
|
|
|
||
|
|
#define I2C_ADDR_EEPROM 0b1010111
|
||
|
|
#define TIMEOUT_US 20000
|
||
|
|
|
||
|
|
static uint8_t scratch[64 + 2];
|
||
|
|
|
||
|
|
int ee_read(uint16_t start, uint8_t *dest, size_t len) {
|
||
|
|
int rv;
|
||
|
|
uint8_t req[2] = {
|
||
|
|
(start & 0xFF00) >> 8,
|
||
|
|
start & 0xFF
|
||
|
|
};
|
||
|
|
TRY(i2c_write_timeout_us(i2c0, I2C_ADDR_EEPROM, req, 2, true, TIMEOUT_US));
|
||
|
|
TRY(i2c_read_timeout_us(i2c0, I2C_ADDR_EEPROM, dest, len, false, TIMEOUT_US));
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ee_write(uint16_t start, const uint8_t *data, size_t len) {
|
||
|
|
int rv;
|
||
|
|
scratch[0] = (start & 0xFF00) >> 8;
|
||
|
|
scratch[1] = (start & 0xFF);
|
||
|
|
memcpy(&scratch[2], data, len);
|
||
|
|
|
||
|
|
TRY(i2c_write_timeout_us(i2c0, I2C_ADDR_EEPROM, scratch, 2 + len, false, TIMEOUT_US));
|
||
|
|
|
||
|
|
sleep_ms(5 * (1 + len / 8));
|
||
|
|
|
||
|
|
return rv;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
//int ee_write(uint8_t start, const uint8_t *data, size_t len) {
|
||
|
|
// int rv;
|
||
|
|
// if (len > 19) return -1;
|
||
|
|
// uint8_t scratch[20];
|
||
|
|
// scratch[0] = start;
|
||
|
|
// memcpy(&scratch[1], data, len);
|
||
|
|
// TRY(i2c_write_timeout_us(i2c0, I2C_ADDR_RTC, scratch, len + 1, true, TIMEOUT_US));
|
||
|
|
// return 0;
|
||
|
|
//}
|