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[Keyboard] Remove i2c write command when reading columns on Ergodox EZ (#8092) 

* Remove i2c write command when reading cols on Ergodox EZ

* Comment on mcp23018 address state during read_cols
daktil_manuform
esinlayo 2020-02-07 18:52:02 -08:00 committed by GitHub
parent 3b1f29a5d6
commit 7182e9a8ad
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1 changed files with 2 additions and 4 deletions
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6
keyboards/ergodox_ez/matrix.c
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@ -208,10 +208,8 @@ static matrix_row_t read_cols(uint8_t row) {
return 0; return 0;
} else { } else {
uint8_t data = 0; uint8_t data = 0;
mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT); // reading GPIOB (column port) since in mcp23018's sequential mode
if (mcp23018_status) goto out; // it is addressed directly after writing to GPIOA in select_row()
mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT);
if (mcp23018_status) goto out;
mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT); mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT);
if (mcp23018_status) goto out; if (mcp23018_status) goto out;
mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT); mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT);