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