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main: fix, write I²C EEPROM in pages

This commit is contained in:
King Kévin 2021-08-17 08:54:17 +02:00
parent 1d78baf925
commit c68bf6a324
1 changed files with 20 additions and 4 deletions
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24
main.c
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@ -173,6 +173,9 @@ static bool save_edid(void)
return ram_eeprom_blockprog(edid, edid_length());
}
// size in byte of a page in the I²C EEPROM (for faster page write)
#define I2C_EEPROM_PAGE_SIZE 16U
// read EDID from I²C memory
// return if succeeded
static bool read_edid(void)
@ -192,12 +195,25 @@ static bool read_edid(void)
// return if succeeded
static bool write_edid(void)
{
const uint8_t address[] = {0};
if (!i2c_master_setup(false)) {
if (!i2c_master_setup(5)) {
puts("I²C setup failed");
return false;
}
if (I2C_MASTER_RC_NONE != i2c_master_address_write(I2C_SLAVE, false, address, ARRAY_LENGTH(address), edid, edid_length())) {
return false;
// write all page
const uint16_t length = edid_length();
for (uint16_t i = 0; i < length; i += I2C_EEPROM_PAGE_SIZE) {
const uint8_t address[] = {i};
const enum i2c_master_rc rc = i2c_master_address_write(I2C_SLAVE, false, address, ARRAY_LENGTH(address), &edid[i], I2C_EEPROM_PAGE_SIZE); // write I²C EEPROM page
if (I2C_MASTER_RC_NONE != rc) {
puts("I²C write failed (");
putc('0' + rc);
putc(')');
if (I2C_MASTER_RC_BUS_ERROR == rc) {
i2c_master_reset(); // try to clear any I²C issue
}
return false;
}
wait_10us((5 + 1) * 100); // wait 5 ms for the page write to complete
}
i2c_master_release(); // release I²C again
return true;